Fracturing system control method, fracturing system, safety control method for fracturing operation, target device, fracturing operation control system, fracturing fluid supply device and control method therefor, feeding device and feeding control method

Abstract

A fracturing system control method, a fracturing system, a safety control method for a fracturing operation, a target device, a fracturing operation control system, a fracturing fluid supply device and a control method therefor, a feeding device and a feeding control method, relating to the field of oilfield equipment. The fracturing system control method comprises: measuring an actual pressure value of a fracturing sand mixing fluid at a wellhead; when the actual pressure value does not exceed a preset pressure value, controlling the discharge rate of the fracturing sand mixing fluid to remain unchanged; and when the actual pressure value exceeds the preset pressure value, controlling the discharge rate of the fracturing sand mixing fluid to be reduced, so that the actual pressure value does not exceed the preset pressure value.

Description

Control method of fracturing system and fracturing system, safety control method of fracturing operation, target equipment and fracturing operation control system, fracturing fluid supply equipment and control method thereof, feeding equipment and feeding control method

[0001] Cross-references

[0002] This application claims priority to the Chinese patent applications filed on January 31, 2024, with application number 202410149113.1, filed with the Patent Office of China, with invention name “Fracturing fluid supply equipment and control method thereof”; the Chinese patent application filed on January 31, 2024, with application number 202410148236.3, filed with the Patent Office of China, with invention name “Safety control method, target equipment and fracturing operation control system for fracturing operation”; the Chinese patent application filed on January 31, 2024, with application number 202410149098.0, filed with the Patent Office of China, with invention name “Fracturing system control method and fracturing system”; and the Chinese patent application filed on January 31, 2024, with application number 202410148242.9, filed with the Patent Office of China, with invention name “Feeding equipment and feeding control method”. The entire contents of these applications are incorporated by reference into this application. Technical Field

[0003] The present application belongs to the technical field of oilfield equipment, and specifically relates to a control method for a fracturing system and a fracturing system, a safety control method for a fracturing operation, target equipment and a fracturing operation control system, a fracturing fluid supply device and a control method thereof, a feeding device and a feeding control method. Background Art

[0004] Fracturing is an effective and widely used method for increasing oil production in oilfields. A fracturing fleet typically includes several to more than twenty pieces of fracturing equipment, including sand mixers. The sand mixer, while responsible for mixing the fracturing fluid and fracturing sand, supplies the fracturing equipment. The fracturing equipment, on the other hand, pressurizes the fracturing mixture to meet the demands of the fracturing operation. Both are key components of a fracturing fleet.

[0005] At present, some fracturing trucks on the market use single-machine control for each device. When abnormal working conditions occur during fracturing operations, abnormal signals cannot be fed back in time, thus affecting the normal fracturing operation process. Summary of the Invention

[0006] The purpose of the embodiments of the present application is to provide a control method for a fracturing system and a fracturing system.

[0007] An embodiment of the present application provides a control method for a fracturing system, the control method comprising: detecting an actual pressure value of a fracturing sand mixing fluid at a wellhead; controlling to maintain a displacement of the fracturing sand mixing fluid unchanged when the actual pressure value does not exceed a preset pressure value; and controlling to reduce the displacement of the fracturing sand mixing fluid so that the actual pressure value does not exceed the preset pressure value when the actual pressure value exceeds the preset pressure value.

[0008] The present application also provides a fracturing system, which adopts the control method of the above-mentioned fracturing system, and the fracturing system includes: a fracturing device, a sand mixing device, a high-pressure manifold, a control center and a pressure detection element; the inlet of the fracturing device is connected to the outlet of the sand mixing device, and the outlet of the fracturing device is connected to the high-pressure manifold, and the high-pressure manifold is used to output fracturing sand mixing fluid; the pressure detection element is arranged on the high-pressure manifold; the control center is electrically connected to the fracturing device, the sand mixing device and the pressure detection element respectively.

[0009] The present application also provides a safety control method for fracturing operations, which includes: a target device obtaining target information related to the fracturing equipment; when the target information meets the target conditions, the target device locks the target valve so that the target valve cannot be opened or closed.

[0010] The present application also provides a target device, which includes: a memory and a processor, wherein the memory stores a program or instruction running on the processor, and when the program or instruction is executed by the processor, the steps of the safety control method for fracturing operations as described above are implemented.

[0011] The present application also provides a fracturing operation control system, which includes: fracturing equipment, a manifold, a target valve, and the target equipment as described above, wherein the target equipment is connected to the fracturing equipment, and the fracturing equipment is connected to the manifold.

[0012] The present application also provides a fracturing fluid supply equipment, which includes: a fluid replenishing device, a base liquid container, a sand mixing device and a control device, wherein the fluid replenishing device is connected to the inlet of the base liquid container, the outlet of the base liquid container is connected to the sand mixing device, and the outlet of the base liquid container is provided with a sand mixing control valve; the base liquid container is provided with a liquid level detection component, and the liquid level detection component and the fluid replenishing device are both connected to the control device. When the detection value of the liquid level detection component is less than a first preset value, the control device controls the fluid replenishing device to open to replenish base liquid into the base liquid container.

[0013] The present application also provides a control method for the above-mentioned fracturing fluid supply equipment, the control method comprising: obtaining the actual liquid level in the base liquid container; when the actual liquid level is less than a first preset value, controlling the liquid replenishing device to open to replenish base liquid into the base liquid container.

[0014] The present application also provides a feeding device, comprising: a feeding device (100), a mixing device (200), a sensing device (300) and an adjusting device (400), wherein the outlet end of the feeding device (100) is communicated with the inlet end of the mixing device (200), the sensing device (300) is arranged on the mixing device (200) to detect the amount of material in the mixing device (200), the adjusting device (400) is connected to the feeding device (100) to adjust the amount of material supplied at the outlet end of the feeding device (100), the sensing device (300) is communicatively connected to the adjusting device (400), and when the amount of material in the mixing device (200) detected by the sensing device (300) does not reach a preset amount range, the adjusting device (400) adjusts the amount of material supplied at the outlet end of the feeding device (100).

[0015] The present application also provides a feeding method, which comprises: detecting the amount of material in a mixing device (200); when the amount of material in the mixing device (200) is less than a first amount of material, controlling the regulating device (400) to increase the amount of material fed at the outlet of the feeding device (100); and when the amount of material in the mixing device (200) is greater than a second amount of material, controlling the regulating device (400) to decrease the amount of material fed at the outlet of the feeding device (100); wherein the first amount of material is less than the second amount of material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a flow chart of a control method for a fracturing system disclosed in an embodiment of the present application;

[0017] FIG2 is a schematic diagram of the multi-level protection control logic disclosed in an embodiment of the present application;

[0018] FIG3 is a schematic diagram of setting multiple parameters in a control center disclosed in an embodiment of the present application;

[0019] FIG4 is a schematic structural diagram of a fracturing system disclosed in an embodiment of the present application;

[0020] FIG5 is a flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application;

[0021] FIG6 is a flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application;

[0022] FIG7 is a flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application;

[0023] FIG8 is a flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application;

[0024] FIG9 is a flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application;

[0025] FIG10 is a schematic diagram of a safety control method for a fracturing operation provided in an embodiment of the present application;

[0026] FIG11 is a complete flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application;

[0027] FIG12 is a structural block diagram of a safety control device for fracturing operations provided in an embodiment of the present application;

[0028] FIG13 is a structural block diagram of a target device provided in an embodiment of the present application;

[0029] FIG14 is a structural block diagram of a fracturing operation control system provided in an embodiment of the present application;

[0030] FIG15 is a schematic structural diagram of a fracturing fluid supply device disclosed in an embodiment of the present application;

[0031] FIG16 is a flow chart of a control method for a fracturing fluid supply device disclosed in an embodiment of the present application.

[0032] FIG17 is a schematic structural diagram of a feeding device disclosed in an embodiment of the present application;

[0033] FIG18 is a schematic structural diagram of a feeding device disclosed in another embodiment of the present application;

[0034] FIG19 is a flow chart of the feeding method disclosed in an embodiment of the present application.

[0035] Explanation of reference numerals: 100 - sand mixing equipment; 200 - fracturing equipment; 300 - mixing equipment; 400 - sand transport equipment; 500 - wellhead; 600 - control center; 710 - pressure detection element; 720 - flow detection element; 730 - liquid level detection element; 810 - first valve body; 820 - second valve body; 830 - third valve body; 910 - high-pressure manifold; 920 - low-pressure manifold; 0100-Liquid storage container, 0200-Mixing device, 0310-First base liquid container, 0320-Second base liquid container, 0330-Third base liquid container, 0340-Fourth base liquid container, 0400-Sand mixing device, 0500-Control device, 0610-First detection component, 0620-Second detection component, 0630-Third detection component, 0640-Fourth detection component, 0700-Mixing control valve, 0810-First control valve, 0820-Second control valve, 0830-Third control valve, 0840-Fourth control valve, 0910-Flow meter, 0920-Remote liquid supply equipment, 0930-Downstream equipment; 1100-Feeding device, 1110-Storage device, 1111-Discharge port, 1120-Transporting device, 1121-Second driving component, 1122-feeding part, 1200-mixing device, 1300-sensing device, 1310-first material level detection element, 1320-first weighing sensor, 1400-adjusting device, 1410-valve plate, 1420-first driving part, 1510-flow detection element, 1520-second material level detection element, 1521-distance measuring sensor, 1522-guided wave radar material level sensor, 1523-radar material level sensor, 1524-ultrasonic material level sensor, 1530-second weighing sensor, 1540-humidity detection element, 1550-camera device, 1560-material level switch, 1600-control device. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0038] The embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0039] 1 to 4 , the present application discloses a control method for a fracturing system. The disclosed control method includes:

[0040] Detect the actual pressure value of the fracturing sand mixing fluid at the wellhead 500;

[0041] When the actual pressure value does not exceed the preset pressure value, the displacement of the fracturing sand mixing fluid is controlled to remain unchanged;

[0042] When the actual pressure value exceeds the preset pressure value, the displacement of the fracturing sand mixing fluid is controlled to be reduced so that the actual pressure value does not exceed the preset pressure value.

[0043] The embodiment of the present application can compare the actual pressure value detected at the wellhead 500 with a preset pressure value, thereby automatically adjusting the displacement of the fracturing sand mixing fluid based on the actual pressure value. Specifically, if the actual pressure value does not exceed the preset pressure value, the displacement of the fracturing sand mixing fluid is controlled to remain unchanged; if the actual pressure value exceeds the preset pressure value, the displacement of the fracturing sand mixing fluid is controlled to be reduced to reduce the pressure at the wellhead 500, so that the actual pressure value does not exceed the preset pressure value, ensuring that the pressure at the wellhead 500 is not too high.

[0044] Based on the above settings, the embodiment of the present application can achieve the correlation between upstream and downstream equipment, so that when an abnormality occurs downstream, the abnormal signal can be fed back to the upstream equipment to achieve adaptive adjustment of the upstream equipment, thereby effectively solving the abnormal problem and ensuring the normal progress of the fracturing operation.

[0045] Optionally, a pressure detection element 710 may be installed at the wellhead 500, or at a pipeline connected to the wellhead 500 (i.e., the high-pressure manifold 910), so as to monitor in real time the actual pressure of the fracturing sand mixing fluid input to the wellhead 500, thereby laying the foundation for subsequent adjustment of the displacement of the fracturing sand mixing fluid.

[0046] The preset pressure value is a pressure reference value (i.e., a pressure protection value) set within the control center 600. The need to adjust the flow rate of the fracturing sand mixing fluid is determined based on the magnitude relationship between the detected actual pressure value and the preset pressure value. Of course, the control center 600 may include more than one preset pressure value, and may also include multiple preset pressure values, so that the detected actual pressure value can be compared with each preset pressure value, thereby enabling multi-level regulation of the flow rate of the fracturing sand mixing fluid based on the multi-level pressure comparison.

[0047] Optionally, when the actual pressure exceeds a preset pressure value but does not exceed a first pressure protection value, the flow rate of the fracturing sand mixing fluid is controlled to be reduced by a first amplitude, wherein the first pressure protection value is greater than the preset pressure value. Based on this, when the flow rate of the fracturing sand mixing fluid is reduced by the first amplitude, the pressure at the wellhead 500 can be appropriately reduced, thereby reducing the actual pressure value detected at the wellhead 500 and returning it to a range that does not exceed the preset pressure value, thereby ensuring the normal progress of the fracturing operation.

[0048] It should be noted that the difference between the first pressure protection value and the preset pressure value can be relatively small. In this case, the displacement of the fracturing sand mixing fluid is reduced by a relatively small first amplitude, thereby alleviating the problem of excessive pressure at the wellhead 500 while ensuring that sufficient fracturing sand mixing fluid is input into the wellhead 500 to ensure the fracturing operation. In addition, in the embodiments of the present application, "not exceeding" can be understood as less than or equal to, and "exceeding" can be understood as greater than.

[0049] For example, the preset pressure value can be set to 80 MPa, and the first pressure protection value can be set to 84 MPa. Of course, both can also be set to other values, which are not specifically limited here.

[0050] As the actual pressure detected at the wellhead 500 increases, if the actual pressure exceeds the first pressure protection value but does not exceed the upper pressure protection value, the flow rate of the fracturing sand mixture can be controlled to be reduced by a second amount, where the upper pressure protection value is greater than the first pressure protection value. Based on this, when the flow rate of the fracturing sand mixture is reduced by the second amount, the pressure at the wellhead 500 can be appropriately reduced, thereby reducing the actual pressure detected at the wellhead 500 and returning it to a range that does not exceed the preset pressure value, thereby ensuring the normal progress of the fracturing operation.

[0051] It should be noted here that the difference between the upper limit pressure protection value and the preset pressure value can be relatively large. At this time, reducing the displacement of the fracturing sand mixing fluid with a larger second amplitude can not only alleviate the problem of excessive pressure at the wellhead 500, but also ensure that sufficient fracturing sand mixing fluid is input into the wellhead 500 to ensure the progress of the fracturing operation.

[0052] Exemplarily, the upper limit pressure protection value may be set to 92 MPa. Of course, it may also be set to other values, which are not specifically limited here.

[0053] Taking into account that the difference between the upper limit pressure protection value and the preset pressure value is relatively large, multiple pressure protection values ​​may be set between the preset pressure value and the upper limit pressure protection value to facilitate multi-level time control.

[0054] Optionally, four levels of pressure protection values ​​can be set between the preset pressure value and the upper pressure protection value, specifically, a first pressure protection value (i.e., a first pressure protection value), a second pressure protection value (i.e., a second pressure protection value), a third pressure protection value (i.e., a third pressure protection value), and a fourth pressure protection value (i.e., a fourth pressure protection value), which increase in sequence. Each of the four pressure protection values ​​is greater than the preset pressure value and less than the upper pressure protection value. Of course, other levels of pressure protection values ​​can also be set, and the specific number can be selected based on actual operating conditions.

[0055] Exemplarily, the first pressure protection value may be set to 84 MPa, the second pressure protection value may be set to 86 MPa, the third pressure protection value may be set to 88 MPa, and the fourth pressure protection value may be set to 90 MPa.

[0056] As the pressure detected at the wellhead 500 continues to increase, if the actual pressure exceeds the upper pressure protection value, the supply of the fracturing sand mixing fluid is stopped, thereby preventing the pressure at the wellhead 500 from continuing to increase. Therefore, the pressure at the wellhead 500 is guaranteed not to exceed the safety range, ensuring the safety of the fracturing operation.

[0057] It should be noted here that the timing of controlling the stop of the supply of the fracturing sand mixing fluid is not restricted. The pump can be stopped when the actual pressure value exceeds the first pressure protection value to a certain extent, or when the actual pressure value exceeds the second pressure protection value to a certain extent. Of course, other forms are also possible and are not specifically limited here.

[0058] In the embodiment of the present application, controlling and reducing the displacement of the fracturing sand mixing fluid includes:

[0059] Controls the amount of displacement reduction or the percentage of displacement reduction.

[0060] Take the example of reducing the displacement:

[0061] When the actual pressure value is greater than the preset pressure value but does not exceed the first pressure protection value, the 3 / min to reduce the displacement; when the actual pressure value is greater than the first pressure protection value but less than the second pressure protection value, the first amplitude is set to 0.5m 3 / min, and reduce the displacement by this amplitude; when the actual pressure value is greater than the second pressure protection value but less than the third pressure protection value, the displacement can be reduced by 1.0m 3 / min to reduce the displacement; when the actual pressure value is greater than the third pressure protection value but less than the fourth pressure protection value, the displacement can be reduced by 2.0m 3 / min to reduce the displacement; when the actual pressure value is greater than the fourth pressure protection value, it can be 4.0m 3 / min to reduce the displacement, and so on, until the actual pressure value exceeds the upper limit pressure protection value and the pump stops.

[0062] Take the percentage of displacement reduction as an example:

[0063] When the actual pressure value is greater than the preset pressure value but does not exceed the first pressure protection value, the displacement can be set to be reduced by 1% of the original displacement (i.e., the displacement during normal fracturing operation); when the actual pressure value is greater than the first pressure protection value but less than the second pressure protection value, the first amplitude is set to 2%, and the displacement is reduced by this amplitude; when the actual pressure value is greater than the second pressure protection value but less than the third pressure protection value, the displacement can be reduced by 5% of the original displacement; when the actual pressure value is greater than the third pressure protection value but less than the fourth pressure protection value, the displacement can be reduced by 10% of the original displacement; when the actual pressure value is greater than the fourth pressure protection value, the displacement can be reduced by 20% of the original displacement, and so on, until the actual pressure value exceeds the upper limit pressure protection value and the pump is stopped.

[0064] Taking into account that the fracturing sand-mixing fluid is a mixture of fracturing fluid and fracturing sand, the displacement of the fracturing sand-mixing fluid is related to the flow rates of the fracturing fluid and the fracturing sand. Therefore, when the actual pressure value does not meet the requirements, the flow rate of the fracturing sand can be directly regulated. By regulating the flow rate of the fracturing sand, the flow rate generated by the fracturing sand-mixing fluid can be regulated, and then the displacement of the fracturing sand-mixing fluid can be regulated.

[0065] Based on the above situation, the control method in the embodiment of the present application further includes:

[0066] When the actual pressure value does not exceed the preset pressure value, the supply amount of fracturing sand is controlled to remain unchanged;

[0067] When the actual pressure value exceeds the preset pressure value, the supply of fracturing sand is controlled to be reduced.

[0068] In an embodiment of the present application, the actual pressure value detected at the wellhead 500 can be compared with the preset pressure value. Not only can the displacement of the fracturing sand mixing fluid be automatically adjusted according to the actual pressure value, but the supply of fracturing sand can also be automatically adjusted according to the actual pressure value, so that the actual pressure value does not exceed the preset pressure value, ensuring that the pressure at the wellhead 500 is not too high.

[0069] It should be noted here that in the embodiment of the present application, the displacement of the fracturing sand mixing fluid can be adjusted individually according to the relationship between the actual pressure value and the preset pressure value, that is, the relationship between the difference between the actual pressure value and the preset pressure value, and the displacement of the fracturing sand mixing fluid is established; of course, the displacement of the fracturing sand mixing fluid and the supply of fracturing sand can also be adjusted at the same time according to the relationship between the actual pressure value and the preset pressure value, that is, the relationship between the difference between the actual pressure value and the preset pressure value, and the displacement of the fracturing sand mixing fluid and the supply of fracturing sand is established at the same time.

[0070] Considering that one or more pressure protection values ​​can be set between the actual pressure value and the preset pressure value, it is convenient to realize multi-level regulation of the pressure mixing fluid discharge volume and the fracturing sand supply volume according to the multi-level pressure comparison.

[0071] Optionally, if the actual pressure exceeds a preset pressure value but does not exceed a first pressure protection value, the fracturing sand supply is controlled to be reduced by a third amount, wherein the first pressure protection value is greater than the preset pressure value. Based on this, while regulating the fracturing sand mixing fluid flow rate, the fracturing sand supply can also be reduced by the third amount, thereby appropriately reducing the pressure at the wellhead 500, causing the actual pressure value detected at the wellhead 500 to decrease and return to a range that does not exceed the preset pressure value, thereby ensuring the normal progress of the fracturing operation.

[0072] As the actual pressure detected at the wellhead 500 increases, if the actual pressure exceeds the first pressure protection value but does not exceed the upper pressure protection value, the fracturing sand supply is controlled to be reduced by a fourth amplitude, wherein the upper pressure protection value is greater than the first pressure protection value. Based on this, while regulating the fracturing sand mixing displacement, the fracturing sand supply can also be reduced by the fourth amplitude, thereby appropriately reducing the pressure at the wellhead 500, causing the actual pressure detected at the wellhead 500 to decrease and return to a range that does not exceed the preset pressure value, ensuring the normal progress of the fracturing operation.

[0073] As the pressure detected at wellhead 500 continues to increase, if the actual pressure exceeds the upper pressure protection value, the supply of fracturing sand is stopped, thereby preventing the pressure at wellhead 500 from continuing to increase. This ensures that the pressure at wellhead 500 does not exceed the safety range, ensuring the safety of the fracturing operation.

[0074] It should be noted here that there is no restriction on the timing of controlling the stop of the supply of fracturing sand. The pump can be stopped when the actual pressure value exceeds the first pressure protection value to a certain extent, or when the actual pressure value exceeds the second pressure protection value to a certain extent. Of course, it can also be stopped in other forms, which are not specifically limited here.

[0075] In the embodiment of the present application, controlling and reducing the supply of fracturing sand includes:

[0076] Control and reduce the sand ratio of fracturing sand or reduce the concentration of fracturing sand.

[0077] Take reducing the sand ratio of fracturing sand as an example:

[0078] When the actual pressure value is greater than the preset pressure value but does not exceed the first pressure protection value, the supply of fracturing sand can be reduced by 2% with a sand ratio; when the actual pressure value is greater than the first pressure protection value but less than the second pressure protection value, the supply of fracturing sand can be reduced by 5% with a sand ratio; when the actual pressure value is greater than the second pressure protection value but less than the third pressure protection value, the supply of fracturing sand can be reduced by 10% with a sand ratio; when the actual pressure value is greater than the third pressure protection value but less than the fourth pressure protection value, the supply of fracturing sand can be reduced by 15% with a sand ratio; when the actual pressure value is greater than the fourth pressure protection value, the supply of fracturing sand can be reduced by 20% with a sand ratio, and so on, until the actual pressure value exceeds the upper limit pressure protection value and the supply is stopped.

[0079] Take reducing the concentration of fracturing sand as an example:

[0080] When the actual pressure value is greater than the preset pressure value but does not exceed the first pressure protection value, the concentration value can be 30kg / m 3 To reduce the supply of fracturing sand; when the actual pressure value is greater than the first pressure protection value and less than the second pressure protection value, the concentration value can be 60kg / m 3 To reduce the supply of fracturing sand; when the actual pressure value is greater than the second pressure protection value and less than the third pressure protection value, the concentration value can be 120kg / m 3 To reduce the supply of fracturing sand; when the actual pressure value is greater than the third pressure protection value and less than the fourth pressure protection value, the concentration value can be 180kg / m 3 To reduce the supply of fracturing sand; when the actual pressure value is greater than the fourth pressure protection value, the concentration value can be 240kg / m 3 To reduce the supply of fracturing sand, and so on, until the actual pressure value exceeds the upper limit pressure protection value and the supply is stopped.

[0081] Considering that the fracturing sand-mixing fluid is a mixture of fracturing fluid and fracturing sand, the displacement of the fracturing sand-mixing fluid is related to the flow rates of the fracturing fluid and the fracturing sand. Therefore, when the actual pressure value does not meet the requirements, the displacement of the fracturing sand-mixing fluid can be directly adjusted, and the flow rate of the fracturing sand can be adjusted according to the displacement of the fracturing sand-mixing fluid to meet the actual fracturing operation needs.

[0082] Based on the above situation, in the embodiment of the present application, controlling and reducing the displacement of the fracturing sand mixing fluid may include:

[0083] Control and reduce the supply of fracturing fluid and fracturing sand.

[0084] It should be noted here that when it is detected that the actual pressure value at the wellhead 500 exceeds the preset pressure value, the feedback signal is directly fed back to the fracturing equipment 200, and the displacement of the fracturing equipment 200 needs to be adjusted. At the same time, the fracturing equipment 200 can also provide feedback to the upstream mixing equipment 300 and the sand transporting equipment 400 respectively to reduce the supply of fracturing fluid and the supply of fracturing sand, thereby resulting in a reduction in the mixed raw materials received by the fracturing equipment 200, and then reducing the displacement of the fracturing equipment 200, which can ultimately reduce the pressure value at the wellhead 500.

[0085] Based on the control method of the above-mentioned fracturing system, the embodiment of the present application also discloses a fracturing system, which adopts the above-mentioned control method. As shown in Figures 1 to 4, the disclosed fracturing system includes: a fracturing device 200, a sand mixing device 100, a high-pressure manifold 910, a control center 600 and a pressure detection element 710; the fracturing device 200

[0086] The inlet of the fracturing equipment 200 is connected to the outlet of the sand mixing equipment 100, and the outlet of the fracturing equipment 200 is connected to the high-pressure manifold 910. The high-pressure manifold 910 is used to output the fracturing sand mixing fluid so that the fracturing sand mixing fluid enters the wellhead 500 to achieve fracturing operation.

[0087] In addition, a pressure detection element 710 is provided in the high-pressure manifold 910 to detect in real time the pressure of the fracturing sand-mixing fluid in the high-pressure manifold 910. For example, the pressure detection element 710 can be located near the inlet of the high-pressure manifold 910 to facilitate the reaction of the pressure of the fracturing sand-mixing fluid in the area near the wellhead 500.

[0088] The control center 600 is used to collect data from various on-site equipment and can also be used to set various operational data and protection parameters. To implement multi-level safety protection control, the control center 600 can set multiple wellhead 500 pressure protection values, multiple fracturing equipment 200 flow reduction values, and multiple sand mixing equipment 100 sand volume values, as shown in Figure 4.

[0089] In addition, for each level of pressure protection of the fracturing equipment 200, there are three options: displacement maintenance, displacement reduction, and pump stop, which can be flexibly set according to actual operating conditions.

[0090] For each level of pressure protection of the sand mixing equipment 100, there are three options: sand quantity maintenance, sand quantity reduction and sand stop, which can be flexibly set according to actual operating conditions.

[0091] Specifically, the control center 600 is electrically connected to the fracturing equipment 200, the sand mixing equipment 100 and the pressure detection element 710, respectively, so that the control center 600 can receive the pressure signal detected by the pressure detection element 710, analyze and process the pressure signal, and finally obtain a control signal, and send the control signal to the fracturing equipment 200, the sand mixing equipment 100, etc., so as to adaptively control the displacement of the fracturing equipment 200 and the sand supply of the sand mixing equipment 100 according to the detected pressure conditions.

[0092] Based on the above settings, the embodiment of the present application can detect the actual pressure value of the fracturing sand mixing fluid near the wellhead 500 in the high-pressure manifold 910 in real time through the pressure detection element 710, and send the actual pressure value to the control center 600. After analysis and processing by the control center 600, the actual pressure value can be compared with the preset pressure value set in the control center 600.

[0093] When the actual pressure value does not exceed the preset pressure value, the control center 600 controls the fracturing equipment 200 and the sand mixing equipment 100 to maintain normal operation and keeps the displacement of the fracturing sand mixing fluid unchanged;

[0094] When the actual pressure value exceeds the preset pressure value, the control center 600 controls the fracturing equipment 200 to reduce the displacement of the fracturing sand mixing fluid so that the actual pressure value returns to a range not exceeding the preset pressure value.

[0095] Therefore, the embodiment of the present application can achieve the correlation between upstream and downstream equipment, so that when an abnormality occurs downstream, the abnormal signal can be fed back to the upstream equipment to achieve adaptive adjustment of the upstream equipment, thereby effectively solving the abnormal problem and ensuring the normal progress of the fracturing operation.

[0096] In some embodiments, the fracturing system may further include a mixing device 300 and a sand conveying device 400, wherein the outlet of the mixing device 300 is connected to the inlet of the sand mixing device 100 for conveying fracturing fluid to the sand mixing device 100, and the outlet of the sand conveying device 400 is connected to the inlet of the sand mixing device 100 for conveying fracturing sand to the sand mixing device 100.

[0097] Among them, the mixing equipment 300 is used to supply fracturing fluid to the sand mixing equipment 100, and the sand conveying equipment 400 is used to supply fracturing sand to the sand mixing equipment 100. The sand ratio is controlled by controlling the mixing equipment 300 and the sand conveying equipment 400 to obtain a fracturing sand mixing fluid that meets the requirements of the fracturing operation.

[0098] In some embodiments, the fracturing system may further include a low-pressure manifold 920, the mixing equipment 300 and the sand transporting equipment 400 are both connected to the inlet of the low-pressure manifold 920, the outlet of the low-pressure manifold 920 is connected to the fracturing equipment 200, and the sand mixing equipment 100 is connected to the low-pressure manifold 920. In this way, the fracturing fluid and fracturing sand can be transported to the sand mixing equipment 100 respectively through the low-pressure manifold 920, and mixed through the sand mixing equipment 100, and finally transported to the fracturing equipment 200 for subsequent injection into the wellhead 500.

[0099] Furthermore, the fracturing system may also include a flow detection element 720 , which is connected to the low-pressure manifold 920 and located upstream of the sand mixing device 100 . In this way, the flow of the fracturing material in the low-pressure manifold 920 can be detected in real time through the flow detection element 720 .

[0100] Specifically, when the mixing device 300 delivers fracturing fluid to the sand mixing device 100 through the low-pressure manifold 920, the flow rate of the fracturing fluid delivered to the sand mixing device 100 can be detected by the flow detection element 720; when the sand conveying device 400 delivers fracturing sand to the sand mixing device 100 through the low-pressure manifold 920, the flow rate of the fracturing sand delivered to the sand mixing device 100 can be detected by the flow detection element 720. Therefore, the fracturing fluid and fracturing sand can enter the sand mixing device 100 in a certain ratio, so that the fracturing sand mixed liquid formed after mixing in the sand mixing device 100 can meet the requirements of the fracturing operation.

[0101] In some embodiments, the fracturing system may further include a liquid level detection element 730, which is connected to the sand mixing device 100 to detect the liquid level of the fracturing sand mixing fluid in the sand mixing device 100 and prevent the liquid level from being too high and causing overflow. It should be noted that when the actual pressure value detected is high, the displacement and sand amount will be reduced to adjust the pressure, which will affect the liquid level in the sand mixing device 100. At this time, the liquid level in the sand mixing device 100 can be adjusted by adjusting the liquid supply of the mixing device 300 and the sand supply of the sand conveying device 400. Therefore, the liquid level in the sand mixing device 100 is monitored in real time through the liquid level detection element 730, so that the liquid level in the sand mixing device 100 can be adjusted, thereby making the liquid level in the sand mixing device 100 relatively stable.

[0102] The fracturing system may further include a first valve body 810, which is connected to the high-pressure manifold 910 and disposed adjacent to the outlet of the fracturing equipment 200. Thus, when fracturing operations are not in progress, the first valve body 810 is closed, sealing the fracturing equipment 200 to prevent leakage of the fracturing fluid within the fracturing equipment 200. During fracturing operations, the first valve body 810 is opened to prevent obstruction of the fracturing fluid. For example, the first valve body 810 may be a starter valve, such as a pneumatic valve or an electric valve, or may alternatively be a manual valve.

[0103] The fracturing system may further include a second valve body 820, which is connected to the low-pressure manifold 920 and is disposed adjacent to the inlet of the fracturing device 200. This allows for control of the fracturing fluid delivered to the fracturing device 200. When no fracturing operation is being performed, the inlet of the fracturing device 200 is closed by closing the second valve body 820, thereby preventing the fracturing fluid in the fracturing device 100 from flowing into the fracturing device 200. For example, the first valve body 810 may be a start-up valve, such as a pneumatic valve, an electric valve, or a manual valve.

[0104] The fracturing system may also include a third valve body 830, which is connected to the low-pressure manifold 920 and is arranged adjacent to the outlet of the mixing device 300. In this way, when no fracturing operation is performed, the third valve body 830 can be closed to block the fracturing fluid in the mixing device 300 to prevent the fracturing fluid from flowing into the mixing device 300.

[0105] In the embodiment of the present application, the upstream equipment are respectively a mixing device 300 and a sand conveying device 400. The mixing device 300 supplies fracturing fluid to the sand mixing device 100, and the sand conveying device 400 supplies fracturing sand to the sand mixing device 100. The sand mixing device 100 mixes the fracturing fluid and fracturing sand input according to a certain sand ratio to form a fracturing sand mixed fluid, and transports it to the fracturing equipment 200 through the low-pressure manifold 920. The fracturing equipment 200 transports it to the wellhead through the high-pressure manifold 910, so that the fracturing sand mixed fluid can reach the well and realize the fracturing operation.

[0106] In the embodiment of the present application, the four-level security protection process is used as an example to explain in detail, specifically:

[0107] Set four levels of pressure protection values: level one pressure protection value (i.e., the first pressure protection value), level two pressure protection value (i.e., the second pressure protection value), level three pressure protection value (i.e., the third pressure protection value), and level four pressure protection value (i.e., the fourth pressure protection value).

[0108] The preset pressure value is set to 80MPa, the first-level pressure protection value is 84MPa, the second-level pressure protection value is 86MPa, the third-level pressure protection value is 88MPa, and the fourth-level pressure protection value is 90MPa.

[0109] Accordingly, the first-level pressure protection reduction value can be 0.5m 3 / min, the secondary pressure protection reduction value can be 1.0m 3 / min, the third-level pressure protection displacement reduction value can be 2.0m 3 / min, the fourth level pressure protection displacement reduction value can be 4.0m 3 / min.

[0110] The first-level pressure protection displacement reduction percentage may be 2%, the second-level pressure protection displacement reduction percentage may be 5%, the third-level pressure protection displacement reduction percentage may be 10%, and the fourth-level pressure protection displacement reduction percentage may be 20%.

[0111] The first-level pressure protection sand reduction ratio can be 5%, the second-level pressure protection sand reduction ratio can be 10%, the third-level pressure protection sand reduction ratio can be 15%, and the fourth-level pressure protection sand reduction ratio can be 20%.

[0112] The first level pressure protection sand reduction concentration value can be 60kg / m 3 The secondary pressure protection sand reduction concentration value can be 120kg / m 3 The third level pressure protection sand reduction concentration value can be 180kg / m 3 The fourth level pressure protection sand reduction concentration value can be 240kg / m 3 .

[0113] For example, in the actual operation process, the displacement reduction is set to the displacement value, and the sand reduction is set to the sand reduction ratio; the actual normal pressure value is 80MPa, and the displacement is 10m 3 / min, and the sand ratio is 40%.

[0114] When the actual pressure reaches the first level pressure protection value of 84MPa but does not reach the second level pressure protection value of 86MPa, the first level pressure protection function is triggered, including triggering the displacement reduction function of the fracturing equipment 200, and reducing the total displacement by 0.5m 3 / min, the total displacement value is reduced to 9.5m 3 / min, and trigger the sand reduction function of the sand mixing equipment 100, and execute the operation according to reducing the sand ratio by 2%, so that the sand ratio is reduced to 38%.

[0115] The embodiment of the present application realizes automatic control and linkage control between the sand mixing device 100 and upstream and downstream equipment, changing the state of independent operation of the sand mixing device 100, upstream equipment (i.e., mixing equipment 300 and sand conveying equipment 400), and downstream equipment (i.e., fracturing equipment 200), so that the key operating parameters of the fracturing equipment 200 can be transmitted to the sand mixing device 100, so that the sand mixing device 100 can predict the operating conditions in advance and take action before the operating parameters of the sand mixing device 100 itself change, and transmit the parameters to the upstream equipment in advance after the operating parameters of the sand mixing device 100 itself change, so that the upstream equipment takes action in advance. Therefore, through intelligent linkage control, the fracturing operation process can be made smoother and more stable, laying a technical foundation for the development trend of automation, remote control, and unmanned operation.

[0116] The safety control method for fracturing operations provided in the embodiments of the present application is applicable to fracturing operations, and more specifically, to the safety control of valves during fracturing operations. Specifically, the valve is locked when the fracturing equipment is being operated (e.g., during the fracturing operation); and the fracturing equipment is locked when the valve is being operated (e.g., when confirming the valve's open or closed state) to ensure the safety of the fracturing operation.

[0117] The safety control method for fracturing operations provided in the embodiments of the present application may involve fracturing equipment, which can be used at the construction site of the fracturing operation. The essence of the fracturing operation is actually to quickly inject a liquid with a certain viscosity into the formation. When the injection speed of the pump is greater than the absorption speed of the formation, the formation will rupture or the original tiny gaps will open to form larger cracks. As the liquid is continuously injected, the cracks that have been formed extend inward. In order to prevent the cracks from closing again after the pump is stopped, proppant is added to the injected liquid so that the proppant fills the cracks opened by the pressure to support the cracks and form a certain flow channel in the original rock formation to realize industrial mining operations.

[0118] The safety control method for fracturing operations provided in the embodiment of the present application can be executed by a target device, and a fracturing equipment control system and a valve control system can be set in the target device, and the fracturing equipment control system and the valve control system can be software control systems. Specifically, the fracturing equipment control system can be used to control the fracturing equipment, and the valve control system can be used to control the valves at the operation site. Among them, the target device can be one electronic device or multiple electronic devices. That is to say, the safety control method for fracturing operations provided in the embodiment of the present application can be executed by one electronic device, wherein the electronic device can be, for example, an instrument skid, or a terminal device such as a desktop computer, a laptop computer, a mobile phone, a tablet computer, or a server, such as an independent physical server, a server cluster composed of multiple servers, and a cloud server capable of cloud computing. In the case where the safety control method for fracturing operations provided in the embodiment of the present application is executed by multiple electronic devices, these multiple electronic devices can form a service cluster, and they cooperate with each other to complete each step.

[0119] The safety control method for fracturing operations provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0120] Please refer to FIG5 , which is a flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG5 , the method includes the following steps:

[0121] Step 110: The target device obtains target information related to the fracturing equipment;

[0122] In an embodiment of the present application, the target device may include an instrument skid, and the fracturing equipment may be equipment used in the fracturing operation, such as a well plug, a ball thrower, and the like. The target information may be instruction information related to the fracturing equipment during the fracturing operation, or mandatory control instruction information for the fracturing equipment. Among them, the instruction information related to the fracturing equipment during the fracturing operation may be, for example, if the fracturing operation is performed using fracturing equipment, the target device will obtain instruction information related to the fracturing equipment to meet the use requirements of the fracturing equipment in the fracturing operation. The mandatory control instruction information of the fracturing equipment may be manual mandatory control instruction information for the fracturing equipment. For example, in the event of a failure of the fracturing equipment, it may be considered that the fracturing equipment is forcibly disabled.

[0123] In one embodiment of the present application, the target information in step 110 includes the displacement or pressure of the fracturing equipment. In step 120, when the target information meets the target condition, the target equipment locks the target valve, including: when the displacement of the fracturing equipment is greater than 0, or when the pressure of the fracturing equipment is greater than 0, the target equipment locks the target valve.

[0124] Step 120: When the target information satisfies the target condition, the target device locks the target valve so that the target valve cannot be opened or closed.

[0125] In this embodiment of the present application, the target condition may include at least one of the following conditions: the fracturing equipment is currently operating, the fracturing equipment is about to begin operating, and the fracturing equipment has been deactivated; the target valve is a valve associated with the fracturing equipment. If the target condition is met, the target valve can be locked to prevent fracturing operation failure or safety accidents caused by the open or closed state of the target valve.

[0126] In one embodiment of the present application, valves at an operation site may include operable valves and inoperable valves. The inoperable valves are valves whose opening or closing during an operation may result in an operation failure or a safety incident. The operable valves include valves that do not affect the operation or are valves used for emergency response. The target valves may include inoperable valves.

[0127] In the embodiments of the present application, the operable valves may include valves that do not affect the operation. Opening or closing such valves will not affect the fracturing operation or cause safety incidents. Therefore, such valves do not need to be locked and can be opened or closed normally during the operation. Furthermore, the operable valves may also include emergency valves that can be used to handle safety hazards during the fracturing operation. Such valves may affect the operation.

[0128] In an embodiment of the present application, if the target information satisfies the target conditions, the target device can lock the inoperable valve, preventing it from being opened or closed. This can prevent the inoperable valve from causing an operation failure or a safety incident due to an abnormal opening or closing state caused by misoperation during operation, thereby preventing the inoperable valve from causing an operation failure or a safety incident.

[0129] In one embodiment of the present application, the number of the target valves is M, where M is an integer greater than 1. The target device locks the target valve in step 120, including: the target device locks each target valve in turn according to the pre-set operation sequence of the M target valves.

[0130] In this embodiment of the present application, during the on / off operation of the target valve, the target device can perform a one-touch switching process according to the operation sequence. That is, the target device performs the on / off operation of the target valves one by one according to the operation sequence. Furthermore, the on / off operation of the next target valve can only be performed after the on / off operation of the previous target valve is completed.

[0131] In an embodiment of the present application, the number of target valves is M, where M is an integer greater than 1; and the target device locking the target valves includes: the target device sequentially locking each target valve according to a preset operation sequence of the M target valves. Thus, because the sequential locking is performed according to the preset operation sequence of the target valves, repeated inspections of a target valve or missed inspections of a target valve can be avoided during the target valve locking process, thereby improving the efficiency and quality of the target valve inspections.

[0132] In an embodiment of the present application, a target device acquires target information related to the fracturing equipment; if the target information satisfies a target condition, the target device locks the target valve, preventing the target valve from being opened or closed. Thus, upon detecting that the target information related to the fracturing equipment satisfies the target condition, the target device locks the target valve at the operation site, preventing the target valve from switching between open and closed states. This prevents incorrect valve opening and closing states due to misoperation, resolving the technical issue of high safety risks associated with fracturing operations.

[0133] Please refer to FIG6 , which is a flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG6 , the method includes the following steps:

[0134] Step 210: The target device obtains a fracturing operation instruction for controlling the fracturing device;

[0135] In an embodiment of the present application, the fracturing operation instruction is used to instruct the fracturing equipment to perform a fracturing operation. Specifically, a fracturing operation can be divided into seven major process operations: circulation, pressure test, test squeeze, fracturing, proppant, displacement squeeze, and backwash or active string. The fracturing operation instruction can be an instruction for instructing the fracturing equipment to perform at least one of the seven process operations. For example, the fracturing operation instruction can be an instruction for instructing the fracturing equipment to perform a circulation operation, or the fracturing operation instruction can be an instruction for instructing the fracturing equipment to perform a pressure test operation.

[0136] Step 220: The target device responds to the fracturing operation instruction. During the process of controlling the fracturing operation of the fracturing device, the target device locks the target valve, so that the target valve cannot be opened or closed.

[0137] In an embodiment of the present application, upon receiving the fracturing operation instruction, it can be determined that the fracturing equipment is about to or is performing a fracturing operation associated with the fracturing operation instruction. At this time, the target equipment can lock the target valve so that the target valve cannot be opened or closed.

[0138] In one embodiment of the present application, in order to monitor whether the fracturing equipment is performing a fracturing operation, the displacement or pressure of the fracturing equipment can be monitored in real time. The displacement or pressure of the fracturing equipment will remain at 0 when the fracturing equipment is not performing a fracturing operation. Therefore, when the displacement of the fracturing equipment is greater than 0, or the pressure of the fracturing equipment is greater than 0, it can be determined that the fracturing equipment is performing a fracturing operation. The target device can lock the target valve, making it impossible to open or close the target valve. In this way, the operating status of the fracturing equipment can be determined by monitoring the displacement and pressure of the fracturing equipment, ensuring that the target valve is locked once the fracturing equipment is in an operating state.

[0139] In one embodiment of the present application, the target valve may include an inoperable valve, which is a valve whose opening or closing during an operation may cause an operation failure or a safety accident.

[0140] In an embodiment of the present application, a target device receives a fracturing operation instruction for controlling a fracturing device. In response to the fracturing operation instruction, the target device locks a target valve while controlling the fracturing operation of the fracturing device. This allows the target valve to be locked during the fracturing operation of the fracturing device, thereby preventing safety accidents caused by improper operation of the target valve during the fracturing operation.

[0141] Please refer to FIG7 , which is a flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG7 , the method includes the following steps:

[0142] Step 310: The target device performs a control operation on the target valve;

[0143] In an embodiment of the present application, the control operation includes performing a switch operation on the target valve. Specifically, the control operation may be an operation of confirming or switching the switch state of the target valve through the target device before performing the fracturing operation.

[0144] Optionally, in one embodiment of the present application, the valves on site may include operable valves and inoperable valves; the inoperable valves are valves whose opening or closing during an operation may cause an operation failure or a safety incident, and the operable valves are valves that do not affect the operation or are valves used for emergency response. The target valves include inoperable valves, and the inoperable valves are valves whose opening or closing during an operation may cause an operation failure or a safety incident.

[0145] Step 320: During the control operation of the target valve, the target device locks the fracturing device, so that the fracturing device cannot perform the fracturing operation;

[0146] In an embodiment of the present application, during the process of confirming or switching the switch state of the target valve, the target device can lock the fracturing device, making it impossible for the fracturing device to perform a displacement operation, thereby achieving the locking of the fracturing device by the target valve.

[0147] Step 330: After the control operation on the target valve is completed, the target device unlocks the fracturing device;

[0148] In the embodiment of the present application, the target valve may include multiple ones, and after the switch status of all target valves is confirmed, the target device may release the lock on the fracturing device. After the lock on the fracturing device is released, the fracturing device can perform normal fracturing operations.

[0149] Step 340: The target device obtains target information related to the fracturing equipment;

[0150] Step 350: When the target information satisfies the target condition, the target device locks the target valve so that the target valve cannot be opened or closed.

[0151] In an embodiment of the present application, when the fracturing equipment is about to be or is in operation, the target device may lock the target valve, that is, the target valve cannot be switched between on and off states.

[0152] In an embodiment of the present application, the target device controls the target valve; while controlling the target valve, the target device locks the fracturing device, preventing it from performing a fracturing operation; after completing the control operation on the target valve, the target device unlocks the fracturing device. Thus, while the target valve is being controlled, the fracturing device is locked; while the fracturing device is operating, the target valve can be locked. By monitoring the target valve and the fracturing device, a safety interlock between the fracturing device and the target valve is achieved.

[0153] Please refer to FIG8 , which is a flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG8 , the method includes the following steps:

[0154] Step 410: The target device obtains target information related to the fracturing equipment;

[0155] Step 420: When the target information satisfies the target condition, the target device sends a valve locking instruction to the valve feedback device, where the valve locking instruction is used to instruct to lock the target valve;

[0156] In an embodiment of the present application, in order to determine or switch the switch state of the target valve before performing a fracturing operation, the target device may send a valve locking instruction to a valve feedback device corresponding to the target valve, wherein the valve locking instruction is used to instruct the target valve to be locked.

[0157] Optionally, in one embodiment of the present application, the valves at the operation site may include operable valves and inoperable valves; the inoperable valves are valves whose opening or closing during the operation process will cause the operation to fail or a safety accident to occur, the operable valves include valves that do not affect the operation, or valves used for emergency treatment, and the target valves may include inoperable valves.

[0158] In an embodiment of the present application, there may be multiple target valves. When sending a valve locking instruction to each target valve, a sequence may be set in advance for the multiple target valves, and a valve locking instruction may be sent to the valve feedback device corresponding to each target valve according to this sequence.

[0159] In one embodiment of the present application, the valve feedback device is wirelessly connected to the target device, and the valve feedback device is used to control the opening and closing of the target valve, and each valve feedback device has a unique IP address; the target valve includes a first valve set at the wellhead, and / or a second valve set at the manifold.

[0160] In an embodiment of the present application, the valve feedback device can communicate with the target device to confirm and switch the open or closed state of the target valve. It should be noted that the location of the target valve is not limited, and the target valve may include valves located at various locations on the well site, such as a first valve located at the wellhead, a second valve located at the manifold, a valve located between the manifold and the wellhead, and so on. At the same time, each valve feedback device can correspond to a target valve at the operation site, and the valve feedback device can have a unique IP address, which can be the IP address of the target valve corresponding to the valve feedback device.

[0161] In an embodiment of the present application, the switching state of the target valve can be further confirmed through communication between the valve feedback device and the target device. At the same time, individual control of each target valve can be achieved by setting a unique IP address for the valve feedback device.

[0162] Step 430: The target device receives the locking completion information sent by the valve feedback device after locking the target valve;

[0163] In an embodiment of the present application, after sending a valve locking instruction to the valve feedback device of the target valve, the valve feedback device determines whether the switch state of the target valve is consistent with the expected switch state. If the switch state of the target valve is consistent, the valve feedback device can confirm the switch state of the target valve and lock the target valve. At the same time, the valve feedback device can send a lock completion message to the target device. If the switch state of the target valve is inconsistent, the switch state of the target valve is switched to the expected switch state, and after the switch is switched, the switch state of the target valve is locked. At the same time, the valve feedback device can send a lock completion message to the target device.

[0164] In the embodiment of the present application, if there are multiple target valves, the switch states of the multiple target valves can be locked according to the sequence. Specifically, after the switch state of the previous target valve is confirmed and the locking completion information sent by the valve feedback device is received, the switch state of the next target valve can be confirmed.

[0165] In an embodiment of the present application, the target device sends a valve locking instruction to the valve feedback device, the valve locking instruction being used to instruct the target valve to be locked; the target device then receives a lock completion message sent by the valve feedback device after locking the target valve. In this manner, after locking the target valve and receiving the lock completion message sent by the valve feedback device, the target valve can be locked. By setting the lock completion message, the locking of the target valve can be reconfirmed, thereby improving the accuracy of the target valve's on / off state and further reducing safety risks.

[0166] Please refer to Figure 9, which is a flow chart of a safety control method for fracturing operations provided in an embodiment of the present application. As shown in Figure 9, the method includes the following steps:

[0167] Step 510: The target device obtains the configured well site layout;

[0168] In an embodiment of the present application, the configured wellsite layout may be a wellsite layout pre-configured for the operation site, and may be restored based on the operation site to obtain a wellsite layout design. The wellsite layout design includes the assembly of components corresponding to the equipment at the operation site. Specifically, the location information of the equipment at the operation site and the connection relationships between the equipment at the operation site may be referenced to determine the location information of the components of the wellsite layout and the connection relationships between the components of the wellsite layout. The components of the wellsite layout include fracturing equipment, target valves, and manifolds, corresponding to the fracturing equipment, target valves, and manifolds at the operation site.

[0169] In the embodiments of the present application, valves at the worksite can be combined with fracturing equipment or manifolds. The valves can be located on the manifold, between the fracturing equipment and the manifold, or at the well site. Furthermore, the target equipment can be connected to the fracturing equipment via a network cable, the fracturing equipment can be connected to the manifold, and the manifold can be connected to the well site.

[0170] In one embodiment of the present application, to ensure accuracy during on-site reconstruction of the operation, the equipment at the operation site (including fracturing equipment, target valves, and manifolds) can be equipped with a feedback device that can obtain the IP address of the equipment at the operation site. During the wellsite layout design process, the components of the wellsite layout can be bound to the IP addresses of the on-site devices corresponding to the components. This enables control and communication between the components of the wellsite layout and the corresponding feedback devices.

[0171] In an embodiment of the present application, components of the wellsite layout can be configured with parameters that indicate the on / off status of the components. Specifically, parameters of valve assemblies can be used to indicate whether the valve assemblies are open or closed. Parameters of fracturing equipment and manifolds can be used to indicate the display status of the fracturing equipment and manifolds. The display status can be determined based on the on / off status of the valve assemblies, indicating whether or not liquid is flowing.

[0172] Step 520: The target device sets the type and operation sequence of target valves in the well site layout, where the type includes operable valves and inoperable valves; the number of target valves is M, where M is an integer greater than 1;

[0173] In the embodiments of the present application, the inoperable valves are valves whose opening or closing during operation could result in operation failure or a safety incident. The operable valves include valves that do not affect the operation, or valves used for emergency response. The operation sequence can be pre-set for the target equipment based on the fracturing operation process. Specifically, fracturing operations can be divided into seven major process operations: circulation, pressure testing, test squeezing, fracturing, proppant, displacement squeezing, and backwash or active string. A corresponding operation sequence can be set for each of the seven process operations.

[0174] In an embodiment of the present application, the operation sequence can be pre-set based on the configured well site layout, and the operation sequence of each of the seven processes can be determined. Specifically, taking the operation sequence of a process as an example, after obtaining the configured well site layout, a new process can be created, and the corresponding process name can be configured for the process. The switch state of the target valve in the process can be determined based on the switch state of the target valve during the actual fracturing operation. The operation sequence of the target valve can be determined based on the position information of the target valve, for example, one by one from north to south. Alternatively, it can be determined based on the distance from the well site, with the target valve closest to the well site determined as the first, the target valve farthest from the well site determined as the last, and so on, to determine the operation sequence of all target valves.

[0175] In one embodiment of the present application, the target valve includes an inoperable valve, which is a valve whose opening or closing during the operation process may cause operation failure or a safety accident.

[0176] Step 530: The target device obtains target information related to the fracturing equipment;

[0177] In the embodiment of the present application, the target information may be used to indicate that the fracturing equipment is about to or is currently performing a fracturing operation of one of the seven processes. For example, the target information may be used to indicate that the fracturing equipment is currently performing a circulation operation.

[0178] Step 540: When the target information satisfies the target condition, the target device locks each target valve in turn according to the preset operation sequence of the M target valves, so that the target valve cannot be opened or closed.

[0179] In the embodiment of the present application, during the on / off operation of the target valves, the target valves can be opened and closed one by one according to the components in the layout design. Alternatively, the target device can perform a one-touch switching process according to the operation sequence. That is, according to the operation sequence, the target device opens and closes the target valves one by one. Furthermore, the on / off operation of the next target valve can only be performed after the on / off operation of the previous target valve is completed.

[0180] In one embodiment of the present application, the locking process can be confirmed by the valve feedback device corresponding to the target valve. Specifically, only after the on / off operation of one target valve is completed and a lock completion message is received from the valve feedback device corresponding to the target valve, can the on / off operation of the next target valve be performed. Specifically, before locking a target valve according to the operation sequence, the valve feedback device of the target valve can confirm the on / off state of the target valve based on the on / off state of the target valve pre-set in the process. If the on / off state of the target valve is consistent with the pre-set on / off state of the target valve, the valve feedback device of the target valve can send a lock completion message to the target device. If the on / off state of the target valve is inconsistent with the pre-set on / off state of the target valve, the valve feedback device of the target valve can switch the on / off state of the target valve. After the state switch, the on / off state of the target valve can be confirmed again. If the on / off state of the target valve is consistent, the valve feedback device of the target valve can send a lock completion message to the target device.

[0181] In an embodiment of the present application, the target valves in the well field can be controlled by restoring the well field layout, and the valves in the well field can be locked in an orderly manner; and the valves are divided into two types, including operable valves and inoperable valves, and the inoperable valves can be locked. In the event of a safety hazard, the operable valves can be used for emergency treatment.

[0182] Please refer to Figures 10 and 11. Figure 10 is a schematic diagram of a safety control method for a fracturing operation provided by an embodiment of the present application. As shown in Figure 10, during the fracturing operation of the fracturing equipment, the target valve can be locked, and during the process of switching the switch state of the target valve, the fracturing equipment can be locked. There may be multiple fracturing equipment at the well site (such as fracturing equipment 1, fracturing equipment 2, ..., fracturing equipment n in Figure 10). The fracturing equipment related to the current fracturing operation can be determined and safety controlled. In addition, during the process of locking the target valve, the target valve can be locked through three aspects (layout design, process design and process control). Specifically, the layout design is to restore the well site layout based on the equipment at the operation site, and obtain information about the equipment at the operation site through the well site layout; the process design is to design the switch state and operation sequence of the target valve in a certain process of the fracturing operation; the process control is to confirm the switch state of the target valve on site one by one according to the switch state and operation sequence of the target valve set in the process design.

[0183] FIG11 is a complete flow chart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG11 , a safety control method for a fracturing operation provided in an embodiment of the present application includes the following steps:

[0184] Step 710: The target device obtains the configured well site layout;

[0185] In the embodiment of the present application, the configured well site layout can be a well site layout pre-configured for the operation site, and can be restored according to the operation site to obtain a well site layout design. The well site layout design includes the assembly of components corresponding to the equipment at the operation site.

[0186] Step 720: The target device sets the type and operation sequence of the target valves in the well site layout, where the type includes operable valves and inoperable valves.

[0187] In the embodiments of the present application, the inoperable valves are valves whose opening or closing during the operation may result in operation failure or a safety incident. The operable valves include valves that do not affect the operation, or valves used for emergency treatment. The operation sequence can be pre-set for the target equipment based on the process of the fracturing operation. Specifically, the fracturing operation can be divided into seven major process operations: circulation, pressure test, test squeeze, fracturing, proppant, displacement squeeze, and backwash or active string. A corresponding operation sequence can be set for each of the seven process operations.

[0188] Step 730: the target device performs a control operation on the target valve;

[0189] Step 740: During the control operation of the target valve, the target device locks the fracturing device, so that the fracturing device cannot perform the fracturing operation;

[0190] Step 750: After the control operation on the target valve is completed, the target device unlocks the fracturing device;

[0191] Step 760: The target device acquires target information related to the fracturing device, wherein the target information includes the displacement or pressure of the fracturing device;

[0192] In an embodiment of the present application, the target information further includes a fracturing operation instruction for controlling a fracturing device, wherein the fracturing operation instruction indicates that the fracturing device is about to perform or is performing a fracturing operation.

[0193] Step 770: When the displacement of the fracturing equipment is greater than 0, or when the pressure of the fracturing equipment is greater than 0, the target equipment sends a locking instruction to the valve feedback device, where the valve locking instruction is used to instruct the target valve to lock.

[0194] In an embodiment of the present application, the valve feedback device is wirelessly connected to the target device and is used to control the opening and closing of the target valve. Each valve feedback device has a unique IP address. The target valves include a first valve located at the wellhead and / or a second valve located at the manifold. The target device can sequentially lock each target valve according to a pre-set operation sequence of the M target valves. Specifically, the target device can send a valve locking instruction to the valve feedback device corresponding to the target valve, and the valve locking instruction is used to instruct the target valve to lock.

[0195] Step 780: The target device receives the locking completion information sent by the valve feedback device after locking the target valve.

[0196] In an embodiment of the present application, after the switch state of the previous target valve is confirmed and locked, the switch state of the next target valve may be confirmed and locked after receiving the locking completion information sent by the valve feedback device.

[0197] In an embodiment of the present application, a target device acquires target information related to the fracturing equipment; if the target information satisfies a target condition, the target device locks the target valve, preventing the target valve from being opened or closed. Thus, upon detecting that the target information related to the fracturing equipment satisfies the target condition, the target device locks the target valve at the operation site, preventing the target valve from switching between open and closed states. This prevents incorrect valve opening and closing states due to misoperation, resolving the technical issue of high safety risks associated with fracturing operations.

[0198] It should be understood that the explanations of the same or corresponding steps in Figures 5 to 11 can refer to each other. For example, the explanations of steps 110 and 120 in Figure 5 can be applied to steps 510 and 520 in Figure 9.

[0199] At the same time, it should be understood that the safety control method for fracturing operations provided in the embodiments of the present application can have the following beneficial effects: First, the method provided in the present application can achieve a safety interlock between the fracturing equipment and the target valve through a process control method, thereby ensuring that during on-site operations, fracturing operations can only be performed after the valve switch status is correct. Second, the method provided in the present application can be used during the fracturing operation. For the locked target valve, the switch status cannot be switched, which can improve the safety of the fracturing operation at the well site. Third, the method provided in the present application can automatically control and monitor the switch status of the valve, which can avoid the safety risks of missed inspections in manual inspections.

[0200] FIG12 is a block diagram of a safety control device for a fracturing operation provided in an embodiment of the present application. Referring to FIG12 , the safety control device 800 for a fracturing operation provided in an embodiment of the present application includes:

[0201] An acquisition module 810 is used to acquire target information related to the fracturing equipment;

[0202] The locking module 820 is configured to lock the target valve when the target information satisfies the target condition, so that the target valve cannot be opened or closed.

[0203] In this embodiment of the present application, the acquisition module is used to obtain target information related to the fracturing equipment; the locking module is used to lock the target valve when the target information meets the target conditions, thereby preventing the target valve from being opened or closed. In this way, upon detecting that the target information related to the fracturing equipment meets the target conditions, the target valve at the operation site can be locked, thereby preventing the target valve from being switched on or off. This prevents the valve from being switched on or off due to incorrect operation, thereby resolving the technical issue of high safety risks associated with fracturing operations.

[0204] In one embodiment of the present application, in the process of acquiring target information related to the fracturing equipment, the acquisition module 810 is specifically used to: acquire a fracturing operation instruction for controlling the fracturing equipment; in the process of locking the target valve when the target information meets the target condition, the locking module 820 is specifically used to: respond to the fracturing operation instruction, in the process of controlling the fracturing operation of the fracturing equipment, lock the target valve.

[0205] In one embodiment of the present application, the target information includes the displacement or pressure of the fracturing equipment. When the target information satisfies the target condition, during the process of locking the target valve, the locking module 820 is specifically configured to lock the target valve when the displacement of the fracturing equipment is greater than 0 or when the pressure of the fracturing equipment is greater than 0.

[0206] In one embodiment of the present application, before obtaining the target information related to the fracturing equipment, the locking module 820 is further used to: perform control operations on the target valve; during the process of controlling the target valve, lock the fracturing equipment so that the fracturing equipment cannot perform fracturing operations; and after the control operation of the target valve is completed, unlock the fracturing equipment.

[0207] In one embodiment of the present application, during the process of locking the target valve, the locking module 820 is specifically used to: send a valve locking instruction to the valve feedback device, wherein the valve locking instruction is used to instruct the target valve to be locked; and receive the locking completion information sent by the valve feedback device after the target valve is locked.

[0208] In one embodiment of the present application, the valve feedback device is wirelessly connected to the safety control device of the fracturing operation, and the valve feedback device is used to control the opening and closing of the target valve, and each valve feedback device has a unique IP address; the target valve includes a first valve set at the wellhead, and / or a second valve set at the manifold.

[0209] In one embodiment of the present application, the number of the target valves is M, where M is an integer greater than 1. During the process of locking the target valves, the locking module 820 is specifically configured to lock each target valve in sequence according to a preset operation sequence of the M target valves.

[0210] In one embodiment of the present application, before obtaining target information related to the fracturing equipment, the acquisition module 810 is further used to: obtain the configured well site layout; set the type and operation sequence of the target valves in the well site layout, the types including operable valves and inoperable valves; the inoperable valves are valves whose opening or closing during the operation process will cause operation failure or a safety accident, and the operable valves include valves that do not affect the operation, or valves used for emergency treatment.

[0211] As shown in FIG53 , an embodiment of the present application further provides a target device 900, which can be various types of computers, etc. The target device 900 includes a processor 910 and a memory 920. The memory 920 stores a program or instruction. When the program or instruction is executed by the processor 910, it implements the steps of any of the methods described above. For example, when the program is executed by the processor 910, the following process is implemented: the target device obtains target information related to the fracturing equipment; when the target information meets the target condition, the target device locks the target valve, making it impossible to open or close the target valve. In this way, when it is detected that the target information related to the fracturing equipment meets the target condition, the target device can lock the target valve at the operation site, thereby preventing the target valve from switching. This prevents the valve from switching incorrectly due to improper operation of the valve, thus resolving the technical problem of high safety risks in fracturing operations.

[0212] As shown in FIG10 and FIG54 , embodiments of the present application further provide a fracturing operation control system, comprising a fracturing device 1010, a manifold 1020, a target valve 1030, and the aforementioned target device 1040. The target device 1040 is connected to the fracturing device 1010, which is in turn connected to the manifold 1020. As shown in FIG10 and FIG54 , the target valve 1030 may be located on the manifold 1020. It should be noted that the location of the target valve on the manifold in FIG10 and FIG54 is merely an example; the target valve may be located on the fracturing device 1010 or between the fracturing device 1010 and the manifold 1020, depending on the actual situation.

[0213] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of each embodiment of the safety control method for fracturing operations are implemented and the same technical effect can be achieved. To avoid repetition, they are not described here.

[0214] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0215] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned method embodiment and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0216] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the above-mentioned method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0217] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0218] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0219] As shown in FIG15 , the embodiment of the present application discloses a fracturing fluid supply device (hereinafter referred to as “the supply device” or “the device”), which can supply fracturing fluid, that is, the supply device disclosed in the embodiment of the present application can utilize the corresponding raw materials to process and form fracturing fluid, wherein the raw materials for forming the fracturing fluid, such as base fluid, can be transported from the outside to the supply device disclosed in the present application. Of course, the supply device can also utilize the corresponding raw materials to process and form upstream intermediate products of the fracturing fluid, such as base fluids such as slick water and guar gum. As shown in FIG15 , the fracturing fluid supply device disclosed in the embodiment of the present application includes a fluid replenishing device, a base fluid container, a sand mixing device 0400 and a control device 0500. Of course, the supply device can also include a pipeline for connecting the corresponding two devices, as well as cables or oil pipelines for providing power to each device, etc., which will not be described in detail herein.

[0220] Among them, the liquid replenishing device is connected to the inlet of the base liquid container, and the liquid replenishing device can be used to control the replenishment of the base liquid in the base liquid container. In detail, as mentioned above, the raw materials for forming the fracturing fluid such as the base liquid in the liquid supply equipment disclosed in the embodiment of the present application can be supplied from the outside. For example, during the operation of the fracturing fluid supply equipment disclosed in the embodiment of the present application, the base liquid equipment and other equipment capable of containing or processing base liquid can be connected to the liquid supply equipment disclosed in the embodiment of the present application, and when it is necessary to replenish the base liquid for the base liquid container in the liquid supply equipment disclosed in the embodiment of the present application, the base liquid in the aforementioned base liquid equipment can be transported to the base liquid container in the liquid supply equipment of the present application.

[0221] Based on the above technical solution, in the present application, the liquid replenishing device may include a control valve, and the control valve is used to control the on-off relationship between the base liquid device and the base liquid container. When the control valve is in the open state, the base liquid device can replenish the base liquid into the base liquid container. Correspondingly, when the control valve is in the closed state, the base liquid device cannot continue to replenish the base liquid into the base liquid container, so that the opening and closing of the control valve can be controlled accordingly according to actual needs.

[0222] Accordingly, in the embodiment of the present application, the control valve of the liquid replenishing device can be connected to the control device 0500, so that the control valve included in the liquid replenishing device can be controlled by the control device 0500 to open, thereby replenishing the base liquid container with base liquid. Of course, in the aforementioned technical solution, the base liquid in the base liquid device can automatically or controlledly flow to the location of the control valve, and when the control valve is in the open state, it passes through the control valve.

[0223] To further enhance the autonomy and independence of the liquid supply device disclosed in the embodiments of this application, in another embodiment of this application, the liquid replenishing device includes a liquid storage container 0100 and a mixing device 0200, so that the liquid supply device itself has the ability to process and form a base liquid. Furthermore, for ease of description, the following embodiments of this application will describe the liquid supply device disclosed in this application using the embodiment in which the liquid replenishing device includes a liquid storage container 0100 and a mixing device 0200 as an example.

[0224] Liquid storage container 0100 is used to store water. More specifically, it can store relatively clean liquid water, such as deionized water or purified water. The water in liquid storage container 0100 is a critical raw material in the mixing process. Liquid storage container 0100 can specifically include a liquid storage tank or other device. Of course, liquid storage container 0100 can also be a barrel-shaped structure, which is not limited herein.

[0225] Optionally, the liquid storage container 0100, the mixing device 0200, the base liquid container, and the sand mixing device 0400 can all be mounted on a transport device such as a vehicle frame or a skid, so that the entire fracturing fluid supply device can be moved together to switch between production sites, thereby improving its ease of use. Of course, in other embodiments of the present application, the liquid storage container 0100, the mixing device 0200, the base liquid container, and the sand mixing device 0400 can also be mounted on a transport device such as a vehicle frame or a skid individually or in combination. Before moving to a production site, the pipelines between the devices on the different transport devices are removed, allowing each transport device to be independently transferred. After arriving at the next production site, the pipelines and cables between the aforementioned devices are connected together. In this case, the transfer difficulty of the entire fracturing fluid supply device can also be relatively reduced.

[0226] Based on the above, optionally, in the liquid supply device disclosed in the embodiment of the present application, the number of liquid storage container 0100 can be one, and by connecting the liquid storage container 0100 to the remote liquid supply device 0920, and having the remote liquid supply device 0920 deliver clean water to the liquid storage container 0100 in real time, the mixing process can be continuously carried out at the production site. Alternatively, the volume of the liquid storage container 0100 can be increased. In this case, the remote liquid supply device 0920 can be used to intermittently deliver clean water to the liquid storage container 0100.

[0227] In another embodiment of the present application, there can be at least two liquid storage containers 0100, and at least two liquid storage containers 0100 can be installed simultaneously on the carrier. In this case, on the one hand, the total liquid storage capacity of the liquid storage containers 0100 can be relatively large, thereby eliminating the need for remote liquid supply equipment 0920 to continuously supply fresh water to the liquid storage containers 0100, reducing the overall control difficulty of the liquid supply process. On the other hand, the size of each liquid storage container 0100 is not relatively large, which facilitates the processing, installation, and transfer of the liquid storage containers 0100. More specifically, the shape and size and other parameters of each liquid storage container 0100 can be made identical, further reducing the difficulty of processing, installation, and transfer of the liquid storage containers 0100.

[0228] The mixing device 0200 is used to mix materials such as dry powder and chemical additives with the clean water in the liquid storage container 0100 and stir them to form a base liquid. Of course, the specific type of base liquid can be changed according to the type of added materials and other parameters to form a desired base liquid.

[0229] The base liquid container is used to hold the base liquid mixed by the mixing device 0200. Similarly, the base liquid container can also include a base liquid tank or other container. Of course, in this application, the shape and size of the base liquid container can also be flexibly selected according to actual needs, and this document does not limit this. In addition, the number of base liquid containers can be one, and the base liquid container can be used to hold base liquid. In order to increase the variety of base liquids that the base liquid container can hold, the base liquid container can optionally be provided with at least two holding chambers, so that multiple holding chambers can be used to hold multiple base liquids.

[0230] In another embodiment of the present application, the number of base liquid containers can be multiple, and multiple base liquid containers can be used to accommodate multiple base liquids. In addition, when there are multiple base liquid containers, at least two of the multiple base liquid containers can accommodate a relatively large amount of the same base liquid, so as to prepare a relatively large volume of the base liquid and make sufficient preparations for the sand mixing process and the production process. Of course, the two technical solutions mentioned above do not conflict with each other, that is, when there are multiple base liquid containers, several of the multiple base liquid containers can be used to accommodate different types of base liquids respectively, and at the same time, several of the multiple base liquid containers can be used to accommodate the same type of base liquid at the same time, and at least two base liquids can be accommodated in multiple base liquid containers respectively.

[0231] The sand mixer 0400 is used to mix sand and other particulate matter with the base fluid stored in the base fluid container to form a fracturing fluid. Of course, the specific type of fracturing fluid can be adjusted based on the type of base fluid added and other parameters to produce the desired fracturing fluid. Furthermore, the sand mixer 0400 is connected to the downstream equipment 0930, allowing the fracturing fluid produced by the sand mixer 0400 to be transported to the corresponding area in the mining area via the downstream equipment 0930, thereby improving production efficiency and mining thoroughness.

[0232] In the present application, the control device 0500 can at least be used to achieve the purpose of controlling the mixing device 0200 and the mixing work, so as to control the progress and stop of the mixing work under corresponding conditions.

[0233] To achieve the purpose of controlling the mixing operation using the control device 0500, in the liquid supply device disclosed in the embodiment of this application, the liquid storage container 0100 and the mixing device 0200 are connected via a connecting pipeline, and a mixing control valve 0700 is provided on the connecting pipeline. The mixing control valve 0700 can control the on-off state between the liquid storage container 0100 and the mixing device 0200. At the same time, the base liquid container is equipped with a liquid level detection member, which can specifically include a liquid level gauge, which can be used to detect the actual liquid level of the base liquid in the base liquid container.

[0234] Accordingly, the liquid level detector, mixing device 0200, and mixing control valve 0700 are all connected to the control device 0500, so that the actual liquid level information in the base liquid container can be transmitted to the control device 0500, allowing the control device 0500 to obtain the actual liquid level information in the base liquid container. Specifically, the liquid level detector, mixing device 0200, and mixing control valve 0700 can all be electrically connected to the control device 0500 via cables, etc., to ensure that signals such as parameter information and control commands can be transmitted via the cables. This can also ensure relatively high control reliability and stability while maintaining relatively low overall cost. Alternatively, wireless transmission can be used to connect the liquid level detector, mixing device 0200, mixing control valve 0700, and control device 0500, which makes assembly relatively easy and reduces the restrictions on the installation of the liquid supply equipment.

[0235] Moreover, when the detection value of the liquid level detection component is less than the first preset value, the control device 0500 can send corresponding control commands to the mixing control valve 0700 and the mixing device 0200 to control the mixing control valve 0700 to open and control the mixing device 0200 to operate, so that the clean water in the liquid storage container 0100 can be transported to the mixing device 0200 through the connecting pipeline, and mixed with other materials in the mixing device 0200 to perform mixing work, and then replenish the base liquid into the base liquid container.

[0236] At the same time, by connecting the mixing device 0200 to the base liquid container, the base liquid mixed in the mixing device 0200 can be transported to the base liquid container to replenish the base liquid. Of course, the base liquid container is also connected to the sand mixing device 0400, and the outlet of the base liquid container is equipped with a sand mixing control valve. Therefore, when it is necessary to produce fracturing fluid, the sand mixing control valve can be opened to control the operation of the sand mixing device 0400 to perform sand mixing.

[0237] Furthermore, it should be noted that during the mixing process of the mixing device 0200, it takes a certain amount of time to mix the dry powder and other materials with the clean water. During this process, the mixing device 0200 can utilize its own blocking function to prevent the unmixed materials from flowing uncontrollably into the base liquid container. In this case, the blocking function is part of the control function of the mixing device 0200. Alternatively, a control valve can be provided between the mixing device 0200 and the base liquid container. In this case, the control valve can be controlled to be closed before and during the mixing process of the mixing device 0200. After the mixing process is completed, the control valve can be opened to allow the base liquid mixed in the mixing device 0200 to be transferred to the base liquid container.

[0238] The present embodiment discloses a fracturing fluid supply device, wherein a fluid replenishment device is connected to a base fluid container. When the fluid replenishment device is in the open state, base fluid can be replenished into the base fluid container. The base fluid container is connected to a sand mixing device 0400, and a sand mixing control valve is provided at the outlet of the base fluid container. When sand mixing is required, the sand mixing control valve can be opened to allow the base fluid in the base fluid container to be transferred to the sand mixing device 0400 to form the fracturing fluid.

[0239] At the same time, in the fracturing fluid supply equipment disclosed in the embodiments of this application, the base liquid container is equipped with a liquid level detector. The liquid level detector and the refilling device are both connected to the control device 0500. When the detection value of the liquid level detector is less than a first preset value, the control device 0500 can control the refilling device to open, thereby replenishing base liquid into the base liquid container through the refilling device. Furthermore, in this application, the control device 0500 can automatically control the base liquid replenishment operation based on the actual liquid level in the base liquid container, thereby saving a lot of manpower, greatly reducing the risk of monitoring errors in the base liquid container, and significantly improving the reliability of the supply equipment.

[0240] As described above, in the fracturing fluid supply equipment disclosed in the embodiments of the present application, the control device 0500 can be used to control the opening and closing of the mixing process. Furthermore, the sand mixing device 0400 and the sand mixing control valve can also be connected to the control device 0500, so that the control device 0500 can also control the opening and closing of the sand mixing device 0400 and the sand mixing control valve. That is, in the present application, the control device 0500 can also control the opening and closing of the sand mixing process, thereby further improving the automation level of the fracturing fluid supply equipment. Similarly, the sand mixing device 0400 and the sand mixing control valve can also be connected to the control device 0500 using a wired connection or a wireless connection according to actual needs, so that signals such as detection information and control commands can be transmitted between the sand mixing device 0400 and the sand mixing control valve and the control device 0500.

[0241] When the above technical solution is adopted, the opening and closing of the sand mixing work can be remotely controlled, thereby reducing the number of manual workers configured at the production site and significantly improving production safety. In addition, in the present application, by configuring corresponding sensors and other parameters, the filling and stopping of the fracturing fluid can be automatically controlled by detecting parameters such as the actual situation of the mining area. In another embodiment of the present application, it is also possible to configure manual control at the control device 0500 so that the staff can input corresponding control commands to the control device 0500 based on the information they have and other conditions, so that the control device 0500 can correspondingly control the opening and closing of the sand mixing work. This can significantly improve the accuracy of the timing of filling the fracturing fluid and improve mining efficiency and economy.

[0242] In the above-mentioned embodiment, the present application discloses a technical solution that can automatically replenish base liquid into the base liquid container when the liquid level in the base liquid container is relatively low. Generally, as the mixing device 0200 continues to operate, the liquid level in the base liquid container can continue to rise. Based on this, in order to prevent the mixing operation of the mixing device 0200 from causing the base liquid to overflow from the base liquid container, in a specific embodiment of the present application, a second preset value can be set, and when the liquid level in the base liquid container reaches the second preset value, the mixing device 0200 is controlled to stop operating. Of course, the second preset value is greater than the first preset value. As for the specific parameters of the first preset value and the second preset value, they can be flexibly selected according to actual needs and are not limited to this herein.

[0243] Furthermore, as described above, the operation of the sand mixing device 0400 consumes the base liquid in the base liquid container. Consequently, regardless of other circumstances, the liquid level in the base liquid container will continue to decrease while the sand mixing device 0400 is operating. Correspondingly, when the sand mixing device 0400 is shut down and without considering unexpected circumstances such as leakage, the liquid level in the base liquid container will remain unchanged. Based on the aforementioned circumstances, when the liquid supply device is operating, as the sand mixing device 0400 continuously consumes the base liquid in the base liquid container, the liquid level in the base liquid container will decrease to a first preset value. In this case, the mixing device 0200 will enter operation to replenish the base liquid in the base liquid container.

[0244] As is well known, the operation of the mixing device 0200 will increase the liquid level in the base liquid container, while the operation of the sand mixing device 0400 will decrease the liquid level in the base liquid container. Based on this, when both the mixing device 0200 and the sand mixing device 0400 are working, the actual liquid level in the mixed liquid container is directly related to the specific value of the difference between the replenishment efficiency of the mixing device 0200 and the consumption efficiency of the sand mixing device 0400. Of course, in order to ensure that the mixing efficiency does not hinder the continuity of the operation of the sand mixing device 0400, in a specific embodiment of the present application, before the sand mixing device 0400 in the liquid supply equipment works, the base liquid with a relatively high liquid level can be stored in the base liquid container in advance. For example, the base liquid container can be filled with the base liquid. At this time, the first preset value can be 0100%; and / or before the sand mixing device 0400 works, the mixing device 0200 can be put into working state in advance, and then the sand mixing device 0400 can be worked, and the mixing device 0200 can be kept working continuously. Accordingly, in this case, the setting value of the first preset value can also be made relatively large, such as 90% or 0100%, etc., which can ensure that the above-mentioned technical solution can be implemented accordingly.

[0245] Of course, in order to minimize the possibility that the mixing efficiency is too low, resulting in the liquid level in the base liquid container continuing to decrease even when the mixing device 0200 continues to operate, in the embodiment of the present application, when the sand mixing device 0400 is operating, the base liquid consumption efficiency of the sand mixing device 0400 can be made less than or equal to the base liquid replenishment efficiency of the mixing device 0200. Of course, the aforementioned consumption efficiency and replenishment efficiency are both average values, that is, the consumption efficiency includes the time span from the last time the base liquid was introduced into the sand mixing device 0400 to the next time the sand mixing device 0400 needs to introduce base liquid. This time span includes the time period during which the sand mixing device 0400 is performing sand mixing, although theoretically, no base liquid is consumed during the aforementioned time period. Similarly, the base liquid replenishment efficiency comprehensively considers the base liquid formation process and the time required to transport it to the base liquid container, etc., to obtain the average base liquid replenishment efficiency. In this case, even if the first preset value is relatively low, such as 50% or 70%, it can also prevent the sand mixing device 0400 from being unable to operate normally due to insufficient base liquid.

[0246] Of course, when adopting the above technical solution, if the base liquid replenishment efficiency exceeds the base liquid consumption efficiency, then as the operating time of the mixing device 0200 continues to increase, the liquid level in the base liquid container will also reach the first preset value again. At this time, if the mixing device 0200 continues to operate, there is still a risk of base liquid overflowing from the base liquid container. Therefore, in this case, a second preset value can also be set, and when the liquid level in the base liquid container reaches the second preset value, the mixing device 0200 is controlled to stop operating. Of course, as the sand mixing device 0400 continues to operate, the liquid level in the base liquid container will also fall below the first preset value again. At this time, the mixing device 0200 is controlled to resume operation until the liquid level in the base liquid container reaches the second preset value again. This cycle is repeated until the sand mixing device 0400 stops operating.

[0247] When adopting the above technical solution, when the sand mixing device 0400 stops working, the liquid level in the base liquid container is usually greater than or equal to the first preset value. In this case, optionally, when the sand mixing device 0400 is in a shutdown state, if the liquid level in the base liquid container is not less than the first preset value, the mixing device 0200 can be stopped.

[0248] To further enhance the adequacy of the next operation of the liquid supply device, in other embodiments of the present application, when the sand mixing device 0400 is shut down and the liquid level in the base liquid container is less than a second preset value, the control device 0500 can also control the mixing device 0200 to operate and control the mixing control valve 0700 to open, thereby performing mixing to replenish the base liquid in the base liquid container until the liquid level in the base liquid container is no less than the second preset value. Of course, the second preset value is greater than the first preset value, and the actual parameters of the two can be flexibly determined according to actual needs.

[0249] As described above, when the liquid level in the base liquid container is lower than the first preset value, the mixing device 0200 can be operated until the liquid level in the base liquid container reaches the second preset value, regardless of whether the sand mixing device 0400 is operating or stopped.

[0250] However, considering that the sand mixing device 0400 typically operates for a relatively long time, in order to prevent the mixing device 0200 from being frequently started and stopped, which would significantly adversely affect its reliability and service life, another embodiment of the present application controls the mixing device 0200 to operate when the sand mixing device 0400 is in operation and the liquid level in the base liquid container is less than a first preset value. During the aforementioned operation of the mixing device 0200, the mixing device 0200 can be initially operated at a preset power level to raise the liquid level in the base liquid container. In other words, when operating at the aforementioned preset power level, the mixing device 0200's efficiency in replenishing the base liquid is greater than its efficiency in consuming the base liquid.

[0251] As described above, after the mixing device 0200 continues to operate at the aforementioned preset power for a certain period of time, the liquid level in the base liquid container will return to the first preset value. In this case, the mixing device 0200 can be operated at a reduced power, that is, operated at another preset power, which is lower than the aforementioned preset power. In this case, depending on the specific parameters of the aforementioned preset power, three situations may occur: the liquid level in the base liquid container continues to rise, the liquid level remains unchanged, or the liquid level continues to fall.

[0252] Afterwards, if the liquid level in the base liquid container continues to rise, the operating power of the mixing device 0200 can be further reduced until the liquid level in the base liquid container remains unchanged or continues to decrease.

[0253] On the other hand, if the liquid level in the base liquid container continues to drop, and once the liquid level in the base liquid container is again less than the first preset value, the operating power of the mixing device 0200 can be increased again. Of course, the increased operating power of the mixing device 0200 will still be less than the aforementioned preset power. If the liquid level in the base liquid container continues to drop, the operating efficiency of the mixing device 0200 can be further increased until the liquid level in the base liquid container remains constant. On the other hand, if the liquid level in the base liquid container rises to the first preset value after the initial increase in the operating efficiency of the mixing device 0200, the operating power of the mixing device 0200 can be further decreased until the liquid level in the base liquid container remains constant.

[0254] In summary, in the embodiment of the present application, when the sand mixing device 0400 is in working condition and the liquid level in the base liquid container is less than the first preset value, the mixing device 0200 can be controlled to work, and after the liquid level in the base liquid container reaches the first preset value again, the mixing device 0200 is controlled to work at a preset power, so that the base liquid replenishment efficiency of the mixing device 0200 is equal to the base liquid consumption efficiency of the sand mixing device 0400, thereby preventing the sand mixing process of the sand mixing device 0400 from being short of base liquid without stopping the mixing device 0200, thereby ensuring the continuity and timeliness of the production process.

[0255] Furthermore, considering that mixing device 0200 experiences relatively high wear when operating at a relatively high power, and that the mixing device 0200 is subjected to a relatively high load, resulting in high energy consumption and significant energy waste, in a specific embodiment of the present application, when sand mixing device 0400 is in a shutdown state and the liquid level in the base liquid container is less than a first preset value, mixing device 0200 can be operated at a second preset power; whereas, when sand mixing device 0400 is in an operating state and the liquid level in the base liquid container is less than the first preset value, mixing device 0200 can be operated at a power greater than the second preset power (e.g., the first preset power). Of course, the specific values ​​of the second preset power and the first preset power can be determined based on actual conditions. Furthermore, to reduce control difficulty, the second preset power can be a fixed value, while to ensure a continuous supply of base liquid and prevent frequent starting and stopping of mixing device 0200, the first preset power can include multiple values, and of course, any value of the first preset power is greater than the second preset power.

[0256] As described above, the number of base liquid containers can be multiple. To this end, in an embodiment of the present application, the base liquid container may include a first base liquid container 0310 and a second base liquid container 0320-0320. Correspondingly, the sand mixing control valve may include a first control valve 0810 and a third control valve 0830, and the liquid level detection component may include a first detection component 0610 and a second detection component 0620. The first base liquid container 0310 can be used to accommodate the first base liquid, and the second base liquid container 0320-0320 can be used to accommodate the second base liquid. Specifically, the first base liquid may include slick water, and the second base liquid may include guar gum solution. Of course, the first base liquid and the second base liquid may also include other types of base liquids, respectively, and this document does not limit this.

[0257] In the case of the above technical solution, the first detection member 0610 is arranged in the first base liquid container 0310, and the second detection member 0620 is arranged in the second base liquid container 03200320, so that the first detection member 0610 and the second detection member 0620 can respectively detect the actual liquid level of the base liquid in the first base liquid container 0310 and the second base liquid container 03200320. At the same time, the inlets of the first base liquid container 0310 and the second base liquid container 03200320 are both connected to the mixing device 0200, and the outlets of the first base liquid container 0310 and the second base liquid container 03200320 are both connected to the sand mixing device 0400. This can ensure that the base liquid formed by mixing in the mixing device 0200 can be transported to the first base liquid container 0310 and the second base liquid container 03200320 according to the type. Accordingly, the base liquid stored in the first base liquid container 0310 and the second base liquid container 03200320 can be transported to the sand mixing device 0400 respectively according to actual needs.

[0258] Of course, in order to achieve the purpose of selecting the delivery path of the base liquid in the mixing device 0200 and the selection of the source of the base liquid in the sand mixing device 0400, in this application, the inlets of the first base liquid container 0310 and the second base liquid container 03200320 are respectively provided with a second control valve 0820 and a fourth control valve 0840, and the outlets of the first base liquid container 0310 and the second base liquid container 03200320 are provided with a first control valve 0810 and a third control valve 0830. Specifically, the first base liquid container 0310 and the second base liquid container 03200320 are provided with a first control valve 0810 and a third control valve 0830. A second control valve 0820 is provided on the connecting pipe between the inlet of the container 0310 and the mixing device 0200. A fourth control valve 0840 is provided on the connecting pipe between the inlet of the second base liquid container 0320 and the mixing device 0200. A first control valve 0810 is provided on the connecting pipe between the outlet of the first base liquid container 0310 and the sand mixing device 0400. A third control valve 0830 is provided on the connecting pipe between the outlet of the second base liquid container 0320 and the sand mixing device 0400. Specifically, the first control valve 0810, the second control valve 0820, the third control valve 0830, and the fourth control valve 0840 can all be electrically controlled valves. Of course, in other embodiments of the present application, the aforementioned valves can also be pneumatic valves, which is not limited herein. Similarly, the aforementioned mixing control valve 0700 can also be an electrically controlled valve or a pneumatic valve, depending on actual needs.

[0259] In the above case, the first control valve 0810, the second control valve 0820, the third control valve 0830 and the fourth control valve 0840 are all connected to the control device 0500, so that when the detection value of the first detection component 0610 is less than the first preset value, the control device 0500 controls the mixing control valve 0700 and the second control valve 0820 to open, and controls the mixing device 0200 to work; and when the detection value of the second detection component 0620 is less than the first preset value, the control device 0500 controls the mixing control valve 0700 and the fourth control valve 0840 to open, and controls the mixing device 0200 to work.

[0260] That is, in an embodiment of the present application, if the first base liquid container 0310 and the second base liquid container 03200320 respectively contain different types of base liquids, that is, the first base liquid and the second base liquid, the first detection member 0610 and the second detection member 0620 can be used to respectively detect the liquid levels in the first base liquid container 0310 and the second base liquid container 03200320, and when the liquid levels in the first base liquid container 0310 and the second base liquid container 03200320 are lower than the first preset value, the control valves respectively connected to the two are controlled to open, so that the mixing device 0200 performs mixing and replenishes the corresponding base liquids for the first base liquid container 0310 and the second base liquid container 03200320.

[0261] It should be noted that, typically, at the same time, only one of the first base liquid container 0310 and the second base liquid container 0320 is connected to the sand mixing device 0400 to prepare the fracturing fluid. That is, in this application, although both the first detection element 0610 and the second detection element 0620 are connected to the control device 0500, at the same time, only one of the first detection element 0610 and the second detection element 0620 is triggered and sends a corresponding signal, causing the mixing device 0200 to operate and mix the corresponding type of base liquid, replenishing the corresponding type of base liquid into the base liquid container corresponding to the detection element that sent the aforementioned signal.

[0262] Furthermore, while mixing device 0200 is performing mixing, the mixing device 0200's inherent blocking function can be utilized to prevent unmixed base liquid from flowing into first base liquid container 0310 or second base liquid container 0320, 0320. Alternatively, the mixing device 0200, as well as the opening and closing of second control valve 0820, fourth control valve 0840, and mixing control valve 0700 can be controlled in stages. Specifically, when mixing is required, mixing control valve 0700 and mixing device 0200 can be opened first to mix the base liquid. After mixing is complete, second control valve 0820 or fourth control valve 0840 can be controlled to open accordingly, depending on the type of base liquid being mixed.

[0263] In addition, in the embodiment of the present application, a third base liquid container 0330, a fourth base liquid container 0400340, and the like may be provided, and each of the third and fourth base liquid containers 0330 and 0400340 may be equipped with a third detection element 0630 and a fourth detection element 0640, respectively, to detect the actual liquid level of the base liquid in the third and fourth base liquid containers 0330 and 0400340, respectively. Correspondingly, the inlet and outlet of the third and fourth base liquid containers 0330 and 0400340 may also be equipped with corresponding control valves, with both inlets communicating with the mixing device 0200 and both outlets communicating with the sand mixing device 0400. In this case, the control device 0500 may also be used to control the aforementioned control valves, thereby flexibly controlling the mixing device 0200 to replenish the third and fourth base liquid containers 0330 and 0400340, respectively, according to actual needs. For the sake of brevity, this will not be described in detail here.

[0264] As described above, at least two base liquid containers can also be prepared for the same base liquid. In this case, the first base liquid container 0310 and the second base liquid container 03200320 can both be used to contain the first base liquid, which can specifically be slippery water or guar gum solution.

[0265] When adopting the above technical solution, the assembly of the first base liquid container 0310 and the second base liquid container 03200320 can refer to the above embodiment, and the difference between the embodiment of the present application and the above embodiment is that: in the embodiment of the present application, the bottom of the first base liquid container 0310 and the bottom of the second base liquid container 03200320 are connected to each other, so that when the sand mixing device 0400 needs to use the first base liquid to prepare the fracturing fluid, the first base liquid can be supplied to the sand mixing device 0400 by opening at least one of the first control valve 0810 set at the outlet of the first base liquid container 0310 and the third control valve 0830 set at the outlet of the second base liquid container 03200320.

[0266] As mentioned above, as the sand mixing work continues, the liquid levels in the first base liquid container 0310 and the second base liquid container 03200320 will continue to drop. Furthermore, in order to prevent the continuity of the sand mixing work from being affected, in an embodiment of the present application, when the detection value of at least one of the first detection member 0610 and the second detection member 0620 is less than the first preset value, the control device 0500 controls the mixing control valve 0700, the second control valve 0820 and the fourth control valve 0840 to be opened, and controls the mixing device 0200 to work, so that the first base liquid container 0310 and the second base liquid container 03200320 can be replenished with the first base liquid at the same time. Similarly, during the mixing process, the blocking function of the mixing device 0200 itself can be used to prevent the base liquid that has not yet completed the mixing work from flowing into the first base liquid container 0310 and the second base liquid container 03200320. Alternatively, the above embodiment can be referred to and the mixing device 0200 and the mixing control valve 0700 can be controlled to open in stages, as well as the second control valve 0820 and the fourth control valve 0840 can be controlled to open.

[0267] Based on the fracturing fluid supply equipment disclosed in the above embodiment, when the liquid level detection component and the fluid replenishing device are both connected to the control device, the embodiment of the present application also discloses a control method, which can be applied to the above-mentioned fluid supply equipment. Of course, the specific structure of the above-mentioned fluid supply equipment and the connection and assembly relationship between the components can refer to the above embodiment. As shown in Figure 16, the control method includes:

[0268] S1. Obtaining the actual liquid level in the base liquid container;

[0269] S2. When the actual liquid level is less than a first preset value, control the liquid replenishing device to open to replenish the base liquid into the base liquid container.

[0270] As described above, the actual liquid level in the base liquid container can be detected by using the liquid level detection component provided in the base liquid container, thereby obtaining the actual liquid level in the base liquid container. Accordingly, the liquid level detection component can transmit its own detection value to the control device, and enable the control device to control the liquid replenishing device to open when the actual liquid level is less than the first preset value to replenish the base liquid into the base liquid container.

[0271] To further enhance the automation level of the fluid supply equipment, the fracturing fluid supply equipment disclosed in the embodiments of this application can also utilize a control device to control the on / off operation of the mixing process. To this end, the sand mixing device and the sand mixing control valve can also be connected to the control device, allowing the control device to also control the on / off operation of the sand mixing device and the sand mixing control valve. That is, in this application, the control device can also control the on / off operation of the sand mixing process, thereby further enhancing the automation level of the fracturing fluid supply equipment.

[0272] When the above technical solution is adopted, the opening and closing of the sand mixing work can be remotely controlled, thereby reducing the number of manpower deployed at the production site and significantly improving production safety. In addition, in the present application, by configuring corresponding sensors and other parameters, the filling and stopping of the fracturing fluid can be automatically controlled by detecting parameters such as the actual situation of the mining area. In another embodiment of the present application, it is also possible to configure manual methods at the control device so that the staff can input corresponding control commands to the control device according to the information they have, so that the control device can control the opening and closing of the sand mixing work accordingly. This can significantly improve the accuracy of the timing of filling the fracturing fluid and improve mining efficiency and economy.

[0273] In a specific embodiment of the present application, the liquid replenishing device may include a liquid storage container and a mixing device, which are interconnected, and the mixing device is also connected to the base liquid container. This has been described above and will not be repeated here. Based on the above embodiment, the mixing device and the mixing control valve can be connected to the control device, and then in the control method disclosed in the embodiment of the present application, the above step S2 may include:

[0274] S21 . When the actual liquid level is less than a first preset value, control the mixing control valve to open, and control the mixing device to operate, so as to replenish the base liquid into the base liquid container.

[0275] As described above, the liquid level detection component, the mixing device and the mixing control valve are all connected to the control device, so that the actual liquid level information in the base liquid container can be transmitted to the control device, so that the control device can obtain the actual liquid level information in the base liquid container.

[0276] Furthermore, when the detection value of the liquid level detector, i.e., the actual liquid level in the base liquid container, is less than a first preset value, the control device can send corresponding control commands to the mixing control valve and the mixing device to control the mixing control valve to open and control the mixing device to operate, so that the clean water in the liquid storage container can be transported to the mixing device through the connecting pipeline and mixed with other materials in the mixing device to perform the mixing operation. At the same time, by connecting the mixing device to the base liquid container, the base liquid mixed in the mixing device can be transported to the base liquid container to provide base liquid replenishment for the base liquid container.

[0277] In addition, it should be noted that during the mixing process of the mixing device, it takes a certain amount of time to mix the dry powder and other materials with the clean water. During this process, the mixing device can utilize its own blocking function to ensure that the unmixed materials do not flow uncontrollably into the base liquid container. In this case, the blocking function is part of the control function of the mixing device. Alternatively, a control valve can be provided between the mixing device and the base liquid container. In this case, before and during the mixing process of the mixing device, the control valve can be controlled to be in a closed state. After the mixing device completes the mixing process, the control valve is opened, allowing the base liquid mixed in the mixing device to be transported to the base liquid container.

[0278] Based on the above embodiment, in order to improve the adequacy of the liquid supply device during the next operation, in a specific embodiment of the present application, when the sand mixing device is shut down and the liquid level in the base liquid container is less than a second preset value, the control device can control the liquid replenishing device to open to replenish the base liquid container until the liquid level in the base liquid container is no less than the second preset value. Of course, the second preset value is greater than the first preset value, and the actual parameters of the two can be flexibly determined according to actual needs.

[0279] That is, in the embodiment of the present application, the above step S21 may specifically include:

[0280] When the sand mixing device is in a shutdown state and the actual liquid level is less than a first preset value, the liquid replenishing device is controlled to open to replenish base liquid into the base liquid container until the actual liquid level reaches a second preset value, wherein the second preset value is greater than the first preset value.

[0281] The operating command of the sand mixing device is issued by the control device, so the control device can obtain the real-time operating status of the sand mixing device. In the above embodiment, the liquid replenishing device can include a control valve, and the control valve is connected to the base liquid device externally. When the control valve is open, the base liquid in the base liquid device can be replenished into the base liquid container through the control valve.

[0282] In another embodiment of the present application, as described above, the liquid replenishing device may include a liquid storage container and a mixing device. In this case, the liquid supply device disclosed in the embodiment of the present application itself has the ability to process and form the base liquid, which can enhance the autonomy and independence of the liquid supply device. Based on this, in the following embodiments of the present application, for ease of description, the liquid replenishing device including the liquid storage container and the mixing device is used as an example.

[0283] As described above, when the sand mixing device is in the shutdown state, the liquid replenishing device can be controlled to be closed when the liquid level in the base liquid container reaches the second preset value to stop replenishing the base liquid into the base liquid container.

[0284] Similarly, when the sand mixing device is in operation, the liquid replenishment device (the mixing device therein) can be controlled to stop operating when the actual liquid level reaches a second preset value. However, considering that the operation duration of the sand mixing device is generally relatively long, in this case, to prevent the mixing device from being frequently started and stopped, which would significantly adversely affect the reliability and service life of the mixing device, in another embodiment of the present application, when the sand mixing device is in operation and the liquid level in the base liquid container is less than a first preset value, the mixing device is controlled to continue operating. That is, when the sand mixing device is in operation, once the liquid level in the base liquid container is less than the first preset value, the mixing device can be controlled to enter the operation state until the sand mixing device stops operating.

[0285] Of course, to ensure the continuous operation of the sand mixer is not affected by the mixing device, during the aforementioned operation of the mixing device, the mixing device can be operated at a predetermined power level to allow the liquid level in the base liquid container to rise again. In other words, when the mixing device is operated at the predetermined power level, the efficiency of the base liquid replenishment by the mixing device is greater than the efficiency of the base liquid consumption by the sand mixer, thereby preventing the sand mixer from having to stop operating due to insufficient base liquid.

[0286] As described above, after the mixing device continues to operate at the aforementioned preset power for a certain period of time, the liquid level in the base liquid container will return to the first preset value. In this case, the mixing device can be operated at a reduced power, that is, at another preset power, which is lower than the aforementioned preset power. In this case, depending on the specific parameters selected for the aforementioned other preset power, the liquid level in the base liquid container may continue to rise, remain unchanged, or continue to fall.

[0287] Afterwards, if the liquid level in the base liquid container continues to rise, the operating power of the mixing device can be further reduced until the liquid level in the base liquid container remains unchanged or continues to decrease.

[0288] On the other hand, if the liquid level in the base liquid container continues to drop, and once the liquid level in the base liquid container is again below the first preset value, the operating power of the mixing device can be increased again. Of course, the increased operating power of the mixing device will still be below the aforementioned preset power. If the liquid level in the base liquid container continues to drop, the operating efficiency of the mixing device can be further increased until the liquid level in the base liquid container remains constant. On the other hand, if the liquid level in the base liquid container rises to the first preset value after the initial increase in the operating efficiency of the mixing device, the operating power of the mixing device can be further reduced until the liquid level in the base liquid container remains constant.

[0289] In summary, in the embodiment of the present application, when the sand mixing device is in working condition and the liquid level in the base liquid container is less than a first preset value, the mixing device can be controlled to operate at a preset power, and when the mixing device operates at the aforementioned preset power, the base liquid replenishment efficiency of the mixing device is equal to the base liquid consumption efficiency of the sand mixing device, thereby preventing the sand mixing process of the sand mixing device from being short of base liquid without stopping the mixing device, thereby ensuring the continuity and timeliness of the production process.

[0290] That is, in the embodiment of the present application, the above step S21 includes:

[0291] When the sand mixing device is in operation and the actual liquid level is less than a first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to mix the base liquid at a first preset power, wherein the base liquid replenishment efficiency when the mixing device operates at the first preset power is equal to the base liquid consumption efficiency of the sand mixing device.

[0292] Of course, the above steps can also be split and include:

[0293] When the sand mixing device is in working state and the actual liquid level is less than a first preset value, controlling the mixing control valve to open, and controlling the mixing device to mix the base liquid at a first preset power;

[0294] After the first preset time, if the actual liquid level continues to drop, the actual power of the mixing device is controlled to increase by the first preset power difference (i.e., ΔK) until the base liquid replenishment efficiency of the mixing device when operating at the first preset power is equal to the base liquid consumption efficiency of the sand mixing device, wherein the new first preset power is equal to the sum of the original first preset power and the first preset power difference;

[0295] After the first preset time, if the actual liquid level rises again, the power of the mixing device is controlled to be reduced by the second preset power difference until the base liquid replenishment efficiency of the mixing device when operating at the first preset power is equal to the base liquid consumption efficiency of the sand mixing device. Of course, the second preset power difference must be smaller than the first preset power difference to ensure that the mixing device can determine its final operating power during the power adaptation process so that its base liquid replenishment efficiency is equal to the base liquid consumption efficiency of the sand mixing device.

[0296] Of course, in actual applications, the first preset power value can be set based on actual conditions, and the base liquid replenishment efficiency of the mixing device when operating at the first preset power is ensured to be no less than the base liquid consumption efficiency of the sand mixing device, thereby reducing control difficulty. The base liquid consumption efficiency of the sand mixing device can be determined based on parameters such as the set power of the sand mixing device, while the base liquid replenishment efficiency of the mixing device can be determined based on the ratio between the power of the mixing device and the base liquid replenishment efficiency. This will not be discussed in detail herein.

[0297] In addition, considering that the mixing device has a relatively large degree of wear when the working power is relatively large, and the load of the mixing device is relatively high, the energy consumption is large and there is a large amount of energy waste, for this reason, in a specific embodiment of the present application, when the sand mixing device is in a shutdown state and the liquid level in the base liquid container is less than the first preset value, the mixing device can be operated at a second preset power; and when the sand mixing device is in a working state and the liquid level in the base liquid container is less than the first preset value, the mixing device can be operated at a power greater than the second preset power (for example, the aforementioned power can be the first preset power). Of course, the specific values ​​of the aforementioned second preset power and the aforementioned first preset power can be determined according to actual conditions. In addition, in order to reduce the difficulty of control, the aforementioned second preset power can be a fixed value, and in order to ensure the continuity of the base liquid supply and prevent the mixing device from frequently starting and stopping, the first preset power can include multiple values. Of course, the value of any first preset power is greater than the second preset power.

[0298] That is, in the embodiment of the present application, before step S2, the following steps are also included:

[0299] Acquire the operating status of the sand mixing device. As described above, the operating status of the sand mixing device is controlled by the control device. Therefore, the control device can acquire the operating status of the sand mixing device. Of course, to ensure the accuracy of acquiring the operating status of the sand mixing device, a flow meter 0910 can also be installed at the outlet of the sand mixing device, and the detection value of the flow meter 0910 can be used to determine the operating status of the sand mixing device. Alternatively, the two aforementioned solutions can be used to collaboratively acquire the operating status of the sand mixing device.

[0300] Based on the above content, the above step S21 includes:

[0301] When the sand mixing device is in a stopped state and the actual liquid level is less than a first preset value, controlling the mixing control valve to open, and controlling the mixing device to mix the base liquid at a second preset power to replenish the base liquid into the base liquid container;

[0302] When the sand mixing device is in operation and the actual liquid level is less than the first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to mix the base liquid at a power greater than the second preset power to replenish the base liquid into the base liquid container.

[0303] As mentioned above, the number of base liquid containers can be multiple. To this end, in an embodiment of the present application, the base liquid container can include a first base liquid container and a second base liquid container. Correspondingly, the sand mixing control valve can include a first control valve and a third control valve, and the liquid level detection component can include a first detection component and a second detection component. The first base liquid container can be used to accommodate the first base liquid, and the second base liquid container can be used to accommodate the second base liquid. Specifically, the first base liquid can include slick water, and the second base liquid can include guar gum solution. Of course, the first base liquid and the second base liquid can also include other types of base liquids, respectively, and this document does not limit this.

[0304] In the case of the above technical solution, the first detection member is provided in the first base liquid container, and the second detection member is provided in the second base liquid container, so that the actual liquid level of the base liquid in each of the first base liquid container and the second base liquid container can be detected by the first detection member and the second detection member. At the same time, the inlets of the first base liquid container and the second base liquid container are both connected to the mixing device, and the outlets of the first base liquid container and the second base liquid container are both connected to the sand mixing device. This ensures that the base liquid formed by mixing in the mixing device can be transported to the first base liquid container and the second base liquid container according to the type. Accordingly, the base liquid stored in the first base liquid container and the second base liquid container can be transported to the sand mixing device according to actual needs.

[0305] Of course, in order to achieve the purpose of selecting the delivery path of the base liquid in the mixing device and selecting the source of the base liquid in the sand mixing device, in this application, the inlets of the first base liquid container and the second base liquid container are respectively provided with a second control valve and a fourth control valve, and the outlets of the first base liquid container and the second base liquid container are provided with a first control valve and a third control valve. Specifically, the second control valve can be provided on the connecting pipe between the inlet of the first base liquid container and the mixing device, the fourth control valve can be provided on the connecting pipe between the inlet of the second base liquid container and the mixing device, the first control valve can be provided on the connecting pipe between the outlet of the first base liquid container and the sand mixing device, and the third control valve can be provided on the connecting pipe between the outlet of the second base liquid container and the sand mixing device. Specifically, the first control valve, the second control valve, the third control valve, and the fourth control valve can all be electrically controlled valves. Of course, in other embodiments of the present application, the aforementioned valves can also be pneumatic valves, which is not limited herein. Similarly, the above-mentioned mixing control valves can also be selected to adopt electrically controlled valves or pneumatic valves according to actual needs.

[0306] In the above case, the first control valve, the second control valve, the third control valve and the fourth control valve are all connected to the control device, so that when the detection value of the first detection member is less than the first preset value, the control device controls the mixing control valve and the second control valve to open, and controls the mixing device to work; and when the detection value of the second detection member is less than the first preset value, the control device controls the mixing control valve and the fourth control valve to open, and controls the mixing device to work.

[0307] That is, in an embodiment of the present application, if the first base liquid container and the second base liquid container respectively contain different types of base liquids, that is, the first base liquid and the second base liquid, the first detection member and the second detection member can be used to respectively detect the liquid levels in the first base liquid container and the second base liquid container, and when the liquid levels in the first base liquid container and the second base liquid container are lower than the first preset value, the control valves respectively connected to the two are controlled to open, so that the mixing device performs mixing work and replenishes the corresponding base liquids for the first base liquid container and the second base liquid container.

[0308] It should be noted that, typically, at any given time, only one of the first and second base liquid containers is connected to the sand mixing device to prepare the fracturing fluid. That is, in this application, although both the first and second detection components are connected to the control device, typically only one of the first and second detection components is triggered at any given time to issue a corresponding signal, causing the mixing device to operate and mix the corresponding type of base liquid, replenishing the corresponding type of base liquid into the base liquid container corresponding to the detection component that issued the signal.

[0309] Furthermore, while the mixing device is performing mixing, the mixing device's inherent blocking function can be utilized to prevent unmixed base liquid from flowing into the first or second base liquid containers. Alternatively, the mixing device, as well as the opening and closing of the second, fourth, and mixing control valves, can be controlled in stages. Specifically, when mixing is required, the mixing control valve and the mixing device can be opened first to mix the base liquid. After the base liquid is mixed, the second or fourth control valve can be controlled to open accordingly, depending on the type of base liquid being mixed.

[0310] In addition, in the embodiment of the present application, a third base liquid container, a fourth base liquid container, etc. may also be provided, and the third base liquid container and the fourth base liquid container, etc. may be equipped with a third detection member and a fourth detection member in sequence to detect the actual liquid level of the base liquid in the third base liquid container and the fourth base liquid container, respectively. Correspondingly, the inlet and outlet of the third base liquid container and the fourth base liquid container may also be equipped with corresponding control valves, respectively, and the inlets of both may be connected to the mixing device, and the outlets of both may be connected to the sand mixing device. In this case, the control device may also be used to control the aforementioned control valves, so that according to actual needs, the mixing device can be flexibly controlled to replenish the third base liquid container and the fourth base liquid container with the third base liquid and the fourth base liquid, respectively. Considering the brevity of the text, this will not be described in detail here.

[0311] Regarding the above technical content, in general, in the control method disclosed in the embodiment of the present application, the above step S1 may include:

[0312] A first actual liquid level in the first base liquid container and a second actual liquid level in the second base liquid container are acquired.

[0313] Correspondingly, the above step S21 may include:

[0314] When the first actual liquid level is less than a first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to operate to replenish the first base liquid into the first base liquid container;

[0315] When the second actual liquid level is less than the first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to operate to replenish the second base liquid into the second base liquid container.

[0316] Of course, after the mixing device completes mixing of the first base liquid, the first base liquid can be transferred to the first base liquid container so that the liquid level in the first base liquid container reaches or exceeds the first preset value. Correspondingly, after the mixing device completes mixing of the second base liquid, the second base liquid can be transferred to the second base liquid container so that the liquid level in the second base liquid container reaches or exceeds the first preset value.

[0317] Accordingly, at least two base liquid containers can be prepared for the same base liquid. In this case, both the first base liquid container and the second base liquid container can be used to contain the first base liquid, which can specifically be slippery water or guar gum solution.

[0318] When adopting the above technical solution, the assembly of the first base liquid container and the second base liquid container can refer to the above embodiment, and the difference between the embodiment of the present application and the above embodiment is that: in the embodiment of the present application, the bottom of the first base liquid container and the bottom of the second base liquid container are connected to each other, so that when the sand mixing device needs to use the first base liquid to prepare the fracturing fluid, the first base liquid can be supplied to the sand mixing device by opening at least one of the first control valve provided at the outlet of the first base liquid container and the third control valve provided at the outlet of the second base liquid container.

[0319] As described above, as the sand mixing work continues, the liquid levels in the first base liquid container and the second base liquid container will continue to drop. Furthermore, in order to prevent the continuity of the sand mixing work from being affected, in an embodiment of the present application, when the detection value of at least one of the first detection member and the second detection member is less than the first preset value, the control device controls the mixing control valve, the second control valve and the fourth control valve to open, and controls the mixing device to work, so that the first base liquid container and the second base liquid container can be replenished with the first base liquid. Similarly, during the mixing process, the blocking function of the mixing device itself can be used to prevent the base liquid that has not yet completed the mixing work from flowing into the first base liquid container and the second base liquid container. Alternatively, the mixing device and the mixing control valve can be controlled to open, and the second control valve and the fourth control valve can be controlled to open in stages.

[0320] Regarding the above technical content, in general, in the control method disclosed in the embodiment of the present application, the above step S1 may include:

[0321] A first actual liquid level in the first base liquid container and a second actual liquid level in the second base liquid container are acquired.

[0322] Correspondingly, the above step S21 may include:

[0323] When at least one of the first actual liquid level and the second actual liquid level is less than a first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to operate to replenish the first base liquid container and the second base liquid container with the first base liquid.

[0324] Of course, after the mixing device completes the mixing of the first base liquid, the first base liquid can be transported to the first base liquid container and the second base liquid container so that the liquid levels in the first base liquid container and the second base liquid container reach or exceed the first preset value.

[0325] Furthermore, as described above, in another embodiment of the present application, the liquid replenishing device may include a control valve and, by connecting to an external base liquid device, replenishes base liquid into the base liquid container in the liquid supply device of the present application when the liquid level in the base liquid container falls below a first preset value. Based on the above technical solution, when the base liquid container includes a first base liquid container and a second base liquid container, the external base liquid device may also be used to replenish base liquid into the first base liquid container and the second base liquid container, respectively.

[0326] Accordingly, when the first base liquid container and the second base liquid container are used to hold the first base liquid and the second base liquid, respectively, the base liquid device can also be capable of transporting the first base liquid and the second base liquid. When the actual liquid level in the first base liquid container is less than a first preset value, the liquid replenishing device is controlled to open to replenish the first base liquid into the first base liquid container. Similarly, when the actual liquid level in the first base liquid container is less than the first preset value, the liquid replenishing device is controlled to open to replenish the second base liquid into the second base liquid container.

[0327] Correspondingly, when both the first base liquid container and the second base liquid container are used to contain the first base liquid, the first base liquid can be replenished into both the first base liquid container and the second base liquid container by controlling the liquid replenishing device to open when the actual liquid level of at least one of the first base liquid container and the second base liquid container is less than the first preset value.

[0328] The feeding equipment and feeding control method provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0329] Please refer to Figures 17-18. The feeding equipment disclosed in the embodiment of the present application includes a feeding device 1100, a mixing device 1200, a sensing device 1300 and an adjusting device 1400, wherein the feeding device 1100 is used to feed materials to the inlet end of the mixing device 1200, and the materials in the mixing device 1200 are mixed with other substances and then provided to subsequent equipment. The sensing device 1300 is used to detect the amount of materials in the mixing device 1200, and the adjusting device 1400 is used to adjust the feeding amount of the feeding device 1100.

[0330] Optionally, the material supplied by the feeding device is sand, the feeding device is a sand feeding device, the mixing device is a sand mixing device, and the sand in the mixing device 1200 is mixed with other substances in proportion. Of course, the material supplied by the feeding device can also be other materials besides sand. The embodiment of the present application does not limit the type of material.

[0331] Optionally, the feeding device 1100 can be a device for storing materials or a device for transporting materials, as long as it can feed materials to the mixing device 1200; the mixing device 1200 can be a mixing hopper, and the materials entering the mixing hopper are mixed with other substances and then flow out from the lower port of the mixing hopper. Of course, the mixing device 1200 can also be other devices other than a mixing hopper, as long as it can hold materials and other substances.

[0332] The outlet end of the feeding device 1100 is connected to the inlet end of the mixing device 1200. Optionally, the outlet end of the feeding device 1100 can be directly located above the inlet end of the mixing device 1200, so that the material flowing out of the feeding device 1100 flows directly into the mixing device 1200. Alternatively, the outlet end of the feeding device 1100 is connected to the inlet end of the mixing device 1200 through other devices, so that the material provided by the feeding device 1100 can flow into the mixing device 1200.

[0333] The sensing device 1300 is arranged in the mixing device 1200 to detect the amount of material in the mixing device 1200. The sensing device 1300 can be a component for detecting the weight of the mixing device 1200, and the amount of material in the mixing device 1200 is fed back by detecting the weight of the mixing device 1200. The sensing device 1300 can also be a component for detecting the material level, and the amount of material is fed back by detecting the material level in the mixing device 1200. Of course, the sensing device 1300 can also be other types of detection components, which indirectly feed back the amount of material in the mixing device 1200 by detecting other physical quantities.

[0334] The regulating device 1400 is connected to the feeding device 1100 to adjust the feeding amount at the outlet end of the feeding device 1100, and the sensing device 1300 is in communication with the regulating device 1400. Optionally, the outlet end of the feeding device 1100 can be located at the bottom of the feeding device 1100, so that the material in the feeding device 1100 flows out directly under the action of gravity, and the regulating device 1400 can adjust the opening of the outlet end of the feeding device 1100, thereby adjusting the feeding amount at the outlet end of the feeding device 1100; the outlet end of the feeding device 1100 can also be located at the side of the feeding device 1100, and the feeding device 1100 is provided with a driving member that drives the material to flow toward its outlet end, and the regulating device 1400 can adjust the driving speed of the driving member to adjust the feeding amount at the outlet end of the feeding device 1100; of course, the regulating device 1400 can also adjust the feeding amount at the outlet end of the feeding device 1100 by other means.

[0335] If the amount of material in the mixing device 1200 detected by the sensing device 1300 does not reach a preset amount range, the regulating device 1400 adjusts the amount of material supplied at the outlet of the feeding device 1100. Specifically, the preset amount range refers to a range between a first amount and a second amount, where the first amount is less than the second amount. If the amount of material in the mixing device 1200 detected by the sensing device 1300 is less than the first amount, indicating that the amount of material in the mixing device 1200 is small, the regulating device 1400 increases the amount of material supplied at the outlet of the feeding device 1100 to increase the amount of material in the mixing device 1200. If the amount of material in the mixing device 1200 detected by the sensing device 1300 is greater than the second amount, indicating that the amount of material in the mixing device 1200 is large, the regulating device 1400 decreases the amount of material supplied at the outlet of the feeding device 1100 to reduce the amount of material in the mixing device 1200.

[0336] The first material quantity and the second material quantity are respectively material quantity values ​​set by the user according to needs.

[0337] It should be noted that the mixing device 1200 in this embodiment provides the material mixed with other substances to the subsequent equipment. Therefore, when the feeding device 1100 provides material to it, the material in the mixing device will also be used by the subsequent equipment. Therefore, when the material consumption of the mixing device 1200 is constant, if the feeding amount of the feeding device 1100 increases, the amount of material in the mixing device 1200 increases; if the feeding amount of the feeding device 1100 decreases, the amount of material in the mixing device 1200 decreases.

[0338] In an embodiment of the present application, the feeding equipment is provided with a sensing device 1300 and an adjusting device 1400. According to the material amount of the mixing device 1200 detected by the sensing device 1300, the adjusting device 1400 constantly adjusts the feeding amount at the outlet end of the feeding device 1100, and further adjusts the material amount entering the mixing device 1200, so that the material amount in the mixing device 1200 is within a preset material amount range, avoiding too much or too little material in the mixing device 1200. In this way, the sensing device 1300 and the adjusting device 1400 realize automatic control without human participation, which is conducive to ensuring adjustment accuracy, improving adjustment efficiency, and saving labor costs.

[0339] Optionally, as shown in Figures 17 and 18 , the feeding device further includes a control device 600, which is in communication with the sensing device 1300 and the regulating device 1400, respectively. The control device 600 accurately controls the regulating device 1400 based on the detection information of the sensing device 1300, thereby achieving automated adjustment of the feeding process. The control device 600 can be a single-chip microcomputer, a programmable logic controller (PLC), or other controller capable of communication control.

[0340] In an optional embodiment, as shown in Figures 17 and 18, the feeding device 1100 includes a storage device 11110. The storage device 11110 can be a device that can directly store materials, such as a storage tank or a storage silo. The embodiment of the present application does not specifically limit the structure of the storage device 11110. The storage device 11110 is provided with a discharge port 1111. The discharge port 1111 can be located at the bottom of the storage device 11110 or at other locations. The discharge port 1111 is connected to the inlet end of the mixing device 1200. In this way, the material flowing out of the discharge port 1111 can enter the mixing device 1200. The adjustment device 1400 is connected to the storage device 11110 to adjust the opening of the discharge port 1111. Optionally, the regulating device 1400 may include a control valve, which may be a solenoid valve. The control valve is arranged at the discharge port 1111, and the control valve is communicated with the sensing device 1300. The opening of the discharge port 1111 is adjusted by the control valve. Further optionally, the control device 600 is communicated with the control valve and the sensing device 1300 respectively.

[0341] Specifically, if the amount of material in the mixing device 1200 detected by the sensing device 1300 is less than the first amount, it indicates that the amount of material in the mixing device 1200 is small. The regulating device 1400 increases the opening of the discharge port 1111 to increase the amount of material discharged from the discharge port 1111. As a result, the amount of material in the mixing device 1200 increases within the same period of time. If the amount of material in the mixing device 1200 detected by the sensing device 1300 is greater than the second amount of material, it indicates that the amount of material in the mixing device 1200 is large. The regulating device 1400 decreases the opening of the discharge port 1111 to reduce the amount of material discharged from the discharge port 1111. As a result, the amount of material in the mixing device 1200 decreases within the same period of time. The first amount of material is smaller than the second amount of material.

[0342] In this embodiment, the regulating device 1400 adjusts the opening of the discharge port 1111 of the storage device 11110 , thereby adjusting the feeding amount of the feeding device 1100 , thereby ensuring that the material amount in the mixing device 1200 is maintained within a preset material amount range.

[0343] Optionally, an opening sensor is further provided at the discharge port 1111 of the storage device 11110, and the opening sensor is used to detect the opening of the discharge port 1111 and display the opening data information.

[0344] In a further embodiment, the adjusting device 1400 includes a valve plate 1410 and a first driving member 1420. The valve plate 1410 can be movably arranged at the discharge port 1111 to adjust the opening of the discharge port 1111. The valve plate 1410 can be a square plate, a circular plate or other structures. The structure of the valve plate 1410 can be the same as the structure of the discharge port 1111. The valve plate 1410 can close or open the discharge port 1111; the first driving member 1420 is connected to the valve plate 1410 to drive the valve plate 1410 to move relative to the discharge port 1111. The first driving member 1420 is communicated with the sensing device 1300. Optionally, the control device 600 is communicated with the first driving member 1420 and the sensing device 1300 respectively.

[0345] Specifically, when the amount of material in the mixing device 1200 detected by the sensing device 1300 is less than the first amount, it indicates that the amount of material in the mixing device 1200 is small. The first driving member 1420 drives the valve plate 1410 to move in the first direction to increase the opening of the discharge port 1111, thereby increasing the amount of material supplied at the outlet of the feeding device 1100. When the amount of material in the mixing device 1200 detected by the sensing device 1300 is greater than the second amount, it indicates that the amount of material in the mixing device 1200 is large. The first driving member 1420 drives the valve plate 1410 to move in the second direction to decrease the opening of the discharge port 1111, thereby decreasing the amount of material supplied at the outlet of the feeding device 1100. The first direction is opposite to the second direction.

[0346] Optionally, the first driving member 1420 can be a driving member such as a cylinder, an electric cylinder, a linear module, etc. that can generate linear displacement. The first driving member 1420 drives the valve plate 1410 to move relative to the discharge port 1111 to adjust the opening of the discharge port 1111. In this case, the first direction and the second direction are both moving directions; or, the first driving member 1420 can be a driving member such as a motor, a pneumatic motor, etc. that can generate rotational power. The first driving member 1420 drives the valve plate 1410 to rotate relative to the discharge port 1111 to adjust the opening of the discharge port 1111. In this case, the first direction and the second direction are both rotation directions.

[0347] In this embodiment, the first driving member 1420 is used to control the movement direction and movement distance of the valve plate 1410 to adjust the degree to which the valve plate 1410 opens the discharge port 1111, which is conducive to accurately adjusting the opening of the discharge port 1111 and ensuring that the material amount in the mixing device 1200 is maintained within the preset material amount range.

[0348] In an optional embodiment, as shown in FIG17 , the feeding device 1100 further includes a feeding device 1120. The inlet end of the feeding device 1120 is in communication with the discharge port 1111, and the outlet end of the feeding device 1120 is in communication with the inlet end of the mixing device 1200. Thus, the material flowing out of the discharge port 1111 of the storage device 11110 enters the feeding device 1120, and after being conveyed by the feeding device 1120, further flows into the mixing device 1200. The regulating device 1400 is connected to the feeding device 1120 to adjust the feeding speed of the feeding device 1120.

[0349] Specifically, when the amount of material in the mixing device 1200 detected by the sensing device 1300 is less than the first amount of material, the amount of material in the mixing device 1200 is small, and while the regulating device 1400 increases the opening of the discharge port 1111, the regulating device 1400 also increases the feeding speed of the feeding device 1120; when the amount of material in the mixing device 1200 detected by the sensing device 1300 is greater than the second amount of material, the amount of material in the mixing device 1200 is large, and while the regulating device 1400 decreases the opening of the discharge port 1111, the regulating device 1400 also decreases the feeding speed of the feeding device 1120.

[0350] That is, the feeding device 1100 is provided with both a storage device 11110 and a feeding device 1120. When the opening of the discharge port 1111 increases, the amount of material entering the feeding device 1120 from the discharge port 1111 increases. By increasing the feeding speed, the material entering the feeding device 1120 is transported to the mixing device 1200 more quickly, and the amount of material entering the feeding device 1120 in the same period of time increases. Similarly, when the opening of the discharge port 1111 decreases, the amount of material entering the feeding device 1120 from the discharge port 1111 decreases. By reducing the feeding speed, the amount of material entering the feeding device 1120 in the same period of time decreases. Otherwise, even if the opening of the discharge port 1111 is adjusted, the constant feeding speed will still cause the amount of material entering the mixing device 1200 to remain unchanged, making it impossible to adjust the amount of material entering the mixing device 1200.

[0351] In this embodiment, as the opening of the discharge port 1111 changes, the regulating device 1400 also adaptively adjusts the feeding speed of the feeding device 1120, which is conducive to accurately adjusting the amount of material entering the mixing device 1200 and ensuring that the amount of material in the mixing device 1200 is maintained within the preset material amount range.

[0352] Of course, in other embodiments, the feeding device 1100 may not be provided with the conveying device 1120 , but may only be provided with the storage device 11110 , so that the outlet end of the storage device 11110 is directly connected to the inlet end of the mixing device 1200 .

[0353] In a further embodiment, the feeding device 1120 includes a second driving member 1121 and a feeding member 1122. The second driving member 1121 is connected to the feeding member 1122. The second driving member 1121 can drive the feeding member 1122 to move so that the feeding member 1122 transports materials. The second driving member 1121 is communicated with the adjusting device 1400. The adjusting device 1400 can adjust the driving state of the second driving member 1121 to change the speed of movement of the feeding member 1122.

[0354] Optionally, the feeding device 1120 can adopt belt conveying, auger conveying or pipeline conveying. For belt conveying and auger conveying, the second driving member 1121 can be a driving member that provides rotational power for an electric motor, a hydraulic motor, etc. When the second driving member 1121 is a motor, the adjusting device 1400 can be a frequency converter, which is electrically connected to the motor. The frequency converter is used to adjust the voltage and frequency output of the motor to change the output speed of the motor, thereby adjusting the feeding speed of the feeding member 1122; when the second driving member 1121 is a hydraulic motor, the adjusting device 1400 can be a flow control valve or a speed regulator. By adjusting the flow control valve or the speed regulator, the output speed of the hydraulic motor is adjusted, thereby adjusting the feeding speed of the feeding member 1122; for the pipeline conveying method, it is necessary to rely on gas to blow the material to realize the conveying process. Therefore, the second driving member 1121 adopts a component that can provide gas, such as a fan. The adjusting device 1400 can also be a frequency converter, which uses the frequency converter to adjust the output speed of the fan to adjust the wind force, thereby adjusting the feeding speed of the feeding member 1122.

[0355] Specifically, when the amount of material in the mixing device 1200 detected by the sensing device 1300 is less than the first amount of material, it means that the amount of material in the mixing device 1200 is small, and the adjusting device 1400 adjusts the second driving member 1121 so that the speed at which the second driving member 1121 drives the feeding member 1122 to move increases, and the feeding speed increases; when the amount of material in the mixing device 1200 detected by the sensing device 1300 is greater than the second amount of material, it means that the amount of material in the mixing device 1200 is large, and the adjusting device 1400 adjusts the second driving member 1121 so that the speed at which the second driving member 1121 drives the feeding member 1122 to move decreases, and the feeding speed decreases.

[0356] With this embodiment, while adjusting the opening of the discharge port 1111, the adjusting device 1400 directly adjusts the movement speed of the second driving member 1121 to adjust the feeding speed, which is conducive to accurately adjusting the feeding speed, and then accurately adjusting the amount of material entering the mixing device 1200, ensuring that the amount of material in the mixing device 1200 is maintained within the preset material amount range.

[0357] In an optional embodiment, the feeding equipment also includes a flow detection element 1510, which is arranged on the feeding device 1120. The flow detection element 1510 is used to detect the flow of the feeding device 1120, that is, the feeding speed of the feeding device 1120. The flow detection element 1510 can be but is not limited to a flow sensor; the flow detection element 1510 is communicatively connected to the regulating device 1400. Optionally, the control device 600 is communicatively connected to the flow detection element 1510 and the regulating device 1400 respectively. In this way, the control device 600 controls the regulating device 1400 to adjust the feeding speed according to the flow value detected by the flow detection element 1510.

[0358] If the flow detection element 1510 detects that the flow rate of the feeding device 1120 does not reach the preset flow rate range, it indicates that the flow rate is relatively large or relatively small. The regulating device 1400 adjusts the feeding speed of the feeding device 1120 until the feeding flow rate is within the preset flow rate range. Specifically, the preset flow rate range refers to the range between a first flow rate and a second flow rate, where the first flow rate is smaller than the second flow rate. If the flow detection element 1510 detects that the flow rate of the feeding device 1120 is smaller than the first flow rate, it indicates that the feeding speed of the feeding device 1120 is relatively small. The regulating device 1400 increases the feeding speed of the feeding device 1120 to increase the flow rate of the feeding device 1120. If the flow detection element 1510 detects that the feeding flow rate of the feeding device 1120 is larger than the second flow rate, it indicates that the feeding speed of the feeding device 1120 is relatively large. The regulating device 1400 decreases the feeding speed of the feeding device 1120 to reduce the flow rate of the feeding device 1120.

[0359] The first flow rate and the second flow rate are flow rate values ​​set by the user according to needs.

[0360] In this embodiment, the regulating device 1400 regulates the feeding speed according to the flow rate of the feeding device 1120 detected by the flow detecting element 1510 to ensure that the feeding speed of the feeding device 1120 is within an appropriate range and to avoid the feeding speed being too high or too low.

[0361] Of course, in other embodiments, the feeding device may not be provided with the flow detection element 1510, and the regulating device 1400 may be directly used to regulate the second driving member 1121 to ensure that the feeding speed of the feeding device 1120 is within an appropriate range.

[0362] In the solution of the present application, the feeding device further includes a second material level detection element 1520, which is disposed on the storage device 11110 to detect the material level of the storage device 11110. Optionally, the second material level detection element 1520 may include at least one of a distance sensor 1521, a guided wave radar material level sensor 1522, a radar material level sensor 1523, and an ultrasonic material level sensor 1524. Of course, other sensors capable of detecting material levels may also be used. Optionally, the distance sensor 1521, the guided wave radar material level sensor 1522, the radar material level sensor 1523, and the ultrasonic material level sensor 1524 are simultaneously disposed on the top of the storage device 11110, and each sensor is spaced apart in the circumferential direction of the storage device 11110. In this way, the material levels at different positions of the storage device 11110 are detected by multiple sensors, which is conducive to accurately detecting the material level of the storage device 11110.

[0363] With such arrangement, the amount of material in the storage device 11110 can be known in time according to the second material level detection element 1520 , and material can be added in time when the storage amount in the storage device 11110 is small, and adding of material can be stopped when the storage amount in the storage device is large.

[0364] Optionally, the feeding device further includes a material level switch 1560, which can be a paddle-type material level switch, a capacitive material level switch, or a radio frequency admittance material level switch. Material level switches 1560 are provided at the bottom, middle, and top of the storage device 11110. When the material level in the storage device 11110 reaches the position corresponding to the material level switch 1560, the material level switch 1560 displays an alarm to prevent the material level in the storage device 11110 from being too high or too low. Furthermore, as shown in FIG18 , a material level switch 1560 is also provided at the top of the mixing device 1200. When the material level in the mixing device 1200 reaches the position corresponding to the material level switch 1560, the material level switch 1560 also displays an alarm to prevent the material level in the mixing device 1200 from being too high.

[0365] In an optional embodiment, as shown in Figures 17 and 18, the feeding device further includes a second load cell 1530, which is disposed at the bottom of the storage device 11110 to detect the weight of the storage device 11110. In this way, the amount of material in the storage device 11110 can be fed back through the weight change detected by the second load cell 1530.

[0366] In an optional embodiment, as shown in FIG17 , the feeding device further includes a humidity detection element 1540. The humidity detection element 1540 may be, but is not limited to, a humidity sensor. The humidity detection element 1540 is disposed in the mixing device 1200 to detect the humidity of the material in the mixing device 1200. Specifically, the detection end of the humidity detection element 1540 extends into the mixing device 1200. In this embodiment, the humidity detection element 1540 is utilized to accurately detect the humidity of the material in the mixing device 1200, so that the storage conditions can be adjusted in a timely manner when the humidity is low or high, thereby preventing the material from being too wet or too dry.

[0367] In an optional embodiment, as shown in reference figure 17, the feeding equipment further includes a camera device 1550, which is arranged in the mixing device 1200 to detect the state of the material in the mixing device 1200. The camera device 1550 can take pictures of the material in the mixing device 1200, so as to conveniently monitor the state of the material in the mixing device 1200 at all times, for example, the cleanliness of the material can be monitored.

[0368] In an optional embodiment, the sensing device 1300 includes a first material level detection element 1310, which is disposed in the mixing device 1200 to detect the material level of the mixing device 1200 and provide feedback on the amount of material in the mixing device 1200 by detecting the material level. The first material level detection element 1310 is communicatively connected to the regulating device 1400. Optionally, the control device 600 is communicatively connected to the first material level detection element 1310 and the regulating device 1400, respectively. The first material level detection element 1310 can be a range sensor, a guided wave radar material level sensor, a radar material level sensor, an ultrasonic material level sensor, or the like, or can be other sensors capable of detecting material level.

[0369] Specifically, when the material level in the mixing device 1200 detected by the first material level detection element 1310 is lower than the first material level, it indicates that the amount of material in the mixing device 1200 is small, and the regulating device 1400 increases the material supply at the outlet of the feeding device 1100 to increase the material amount in the mixing device 1200. When the material level in the mixing device 1200 detected by the first material level detection element 1310 is higher than the second material level, it indicates that the amount of material in the mixing device 1200 is large, and the regulating device 1400 decreases the material supply at the outlet of the feeding device 1100 to reduce the material amount in the mixing device 1200. The first material level is lower than the second material level, and the first material level and the second material level are material levels set by the user as required.

[0370] Optionally, the first material level is the material level corresponding to when the material amount in the mixing device 1200 reaches the first material amount in the foregoing text, and the second material level is the material level corresponding to when the material amount in the mixing device 1200 reaches the second material amount in the foregoing text.

[0371] In this embodiment, the sensing device 1300 detects the material level of the mixing device 1200 to provide feedback on the material quantity, so that the regulating device 1400 adjusts the supply quantity of the feeding device 1100 accordingly to ensure that the material quantity in the mixing device 1200 is maintained within the preset material quantity range.

[0372] In another embodiment, the sensing device 1300 includes a first weighing sensor 1320, which is arranged at the bottom of the mixing device 1200 to detect the weight of the mixing device 1200, and to provide feedback on the amount of material in the mixing device 1200 by detecting the weight. The first weighing sensor 1320 is communicatively connected to the regulating device 1400. Optionally, the control device 600 is communicatively connected to the first weighing sensor 1320 and the regulating device 1400, respectively.

[0373] Specifically, if the weight of the mixing device 1200 detected by the first load cell 1320 is less than the first weight, it indicates that the amount of material in the mixing device 1200 is small, and the regulating device 1400 increases the amount of material supplied at the outlet of the feeding device 1100 to increase the amount of material in the mixing device 1200. If the weight of the mixing device 1200 detected by the first load cell 1320 is greater than the second weight, it indicates that the amount of material in the mixing device 1200 is large, and the regulating device 1400 decreases the amount of material supplied at the outlet of the feeding device 1100 to reduce the amount of material in the mixing device 1200. The first weight is less than the second weight, and the first and second weights are material levels set by the user as required.

[0374] Optionally, the first weight is the weight corresponding to when the amount of material in the mixing device 1200 reaches the first amount in the foregoing text, and the second weight is the weight corresponding to when the amount of material in the mixing device 1200 reaches the second amount in the foregoing text.

[0375] In this embodiment, the sensing device 1300 detects the weight of the mixing device 1200 to provide feedback on the material quantity, so that the regulating device 1400 adjusts the feeding amount of the feeding device 1100 accordingly to ensure that the material quantity in the mixing device 1200 is maintained within a preset material quantity range.

[0376] Based on the feeding device disclosed in this application, the embodiment of this application further discloses a feeding control method. Referring to FIG19 , the feeding control method includes:

[0377] S100 , detecting the amount of material in the mixing device 1200 .

[0378] Alternatively, the material level of the mixing device 1200 may be detected by the first material level detection element 1310, or the weight of the mixing device 1200 may be detected by the first weight sensor, thereby indirectly providing feedback on the material quantity of the mixing device 1200. Of course, the material quantity of the mixing device 1200 may also be indirectly provided by detecting other physical quantities of the material in the mixing device 1200.

[0379] S200 , when the material amount in the mixing device 1200 is less than the first material amount, the regulating device 1400 is controlled to increase the material supply amount at the outlet end of the feeding device 1100 .

[0380] S300 , when the material amount in the mixing device 1200 is greater than the second material amount, the regulating device 1400 is controlled to reduce the material supply amount at the outlet end of the feeding device 1100 .

[0381] The first material amount is smaller than the second material amount.

[0382] In an embodiment in which the material level of the mixing device 1200 is detected by the first material level detection element 1310, a situation in which the material level in the mixing device 1200 is lower than the first material level indicates that the material amount in the mixing device 1200 is less than the first material amount, and a situation in which the material level in the mixing device 1200 is higher than the first material level indicates that the material amount in the mixing device 1200 is greater than the second material amount; or, in an embodiment in which the weight of the mixing device 1200 is detected by the first weighing sensor 1320, a situation in which the weight of the mixing device 1200 is less than the first weight indicates that the material amount in the mixing device 1200 is less than the first material amount, and a situation in which the weight of the mixing device 1200 is greater than the second weight indicates that the material amount in the mixing device 1200 is greater than the second material amount.

[0383] Optionally, when the amount of material in the mixing device 1200 is less than the first amount of material, the control regulating device 1400 increases the opening of the discharge port 1111 of the storage device 11110, and controls the regulating device 1400 to increase the feeding speed of the feeding device 1120; when the amount of material in the mixing device 1200 is greater than the second amount of material, the control regulating device 1400 decreases the opening of the discharge port 1111 of the storage device 11110, and controls the regulating device 1400 to decrease the feeding speed of the feeding device 1120.

[0384] According to this feeding control method, the regulating device 1400 timely adjusts the feeding amount at the outlet end of the feeding device 1100 according to the amount of material in the mixing device 1200, so that the amount of material in the mixing device 1200 is within the preset material amount range, realizing an automatic adjustment process without the need for human participation, which is conducive to ensuring adjustment accuracy, improving adjustment efficiency, and saving labor costs.

[0385] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0386] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), including a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0387] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A method for controlling a fracturing system, wherein: The control method includes: Detect the actual pressure value of the fracturing sand mixing fluid at the wellhead; When the actual pressure value does not exceed the preset pressure value, controlling the displacement of the fracturing sand mixing fluid to remain unchanged; When the actual pressure value exceeds the preset pressure value, the displacement of the fracturing sand mixing fluid is controlled to be reduced so that the actual pressure value does not exceed the preset pressure value.

2. The control method according to claim 1, wherein: When the actual pressure value exceeds the preset pressure value and does not exceed a first pressure protection value, the displacement of the fracturing sand mixing fluid is controlled to be reduced by a first amplitude, wherein the first pressure protection value is greater than the preset pressure value.

3. The control method according to claim 2, wherein: When the actual pressure value exceeds a first pressure protection value but does not exceed an upper pressure protection value, the displacement of the fracturing sand mixing fluid is controlled to be reduced by a second amplitude, wherein the upper pressure protection value is greater than the first pressure protection value.

4. The control method according to claim 2, wherein: When the actual pressure value exceeds an upper pressure protection value, the supply of the fracturing sand mixing fluid is controlled to be stopped, wherein the upper pressure protection value is greater than the first pressure protection value.

5. The control method according to any one of claims 1 to 4, wherein: The controlling and reducing the displacement of the fracturing sand mixing fluid includes: Controls the amount of displacement reduction or the percentage of displacement reduction.

6. The control method according to claim 1, wherein: The control method further includes: controlling the supply amount of the fracturing sand to remain unchanged when the actual pressure value does not exceed the preset pressure value; When the actual pressure value exceeds the preset pressure value, the supply amount of the fracturing sand is controlled to be reduced.

7. The control method according to claim 6, wherein: When the actual pressure value exceeds the preset pressure value and does not exceed a first pressure protection value, the supply of the fracturing sand is controlled to be reduced by a third amplitude, wherein the first pressure protection value is greater than the preset pressure value.

8. The control method according to claim 7, wherein: When the actual pressure value exceeds the first pressure protection value and does not exceed an upper pressure protection value, the sand mixing amount of the fracturing sand is controlled to be reduced by a fourth amplitude, wherein the upper pressure protection value is greater than the first pressure protection value.

9. The control method according to claim 7, wherein: When the actual pressure value exceeds an upper pressure protection value, the supply of the fracturing sand is stopped, wherein the upper pressure protection value is greater than the first pressure protection value.

10. The control method according to any one of claims 6 to 9, wherein: The controlling and reducing the supply of fracturing sand includes: The sand ratio of the fracturing sand is controlled to be reduced or the concentration of the fracturing sand is reduced.

11. The control method according to any one of claims 1 to 4, wherein: The control to reduce the displacement of the fracturing sand mixing fluid includes: Control and reduce the supply of fracturing fluid and fracturing sand.

12. A fracturing system, using the control method according to any one of claims 1 to 11, wherein: The fracturing system comprises: a fracturing device (200), a sand mixing device (100), a high-pressure manifold (910), a control center (600) and a pressure detection element (710); The inlet of the fracturing equipment (200) is connected to the outlet of the sand mixing equipment (100), and the outlet of the fracturing equipment (200) is connected to the high-pressure manifold (910), and the high-pressure manifold (910) is used to output the fracturing sand mixing fluid; The pressure detection element (710) is provided on the high-pressure manifold (910); The control center (600) is electrically connected to the fracturing equipment (200), the sand mixing equipment (100), and the pressure detection element (710), respectively.

13. The fracturing system of claim 12, wherein: The fracturing system further includes a mixing device (300) and a sand transport device (400); The outlet of the mixing device (300) is connected to the inlet of the sand mixing device (100) for delivering fracturing fluid to the sand mixing device (100); The outlet of the sand conveying device (400) is connected to the inlet of the sand mixing device (100) and is used to convey fracturing sand to the sand mixing device (100).

14. The fracturing system of claim 13, wherein: The fracturing system further comprises a low-pressure manifold (920), the mixing device (300) and the sand transporting device (400) are both connected to the inlet of the low-pressure manifold (920), the outlet of the low-pressure manifold (920) is connected to the fracturing device (200), and the sand mixing device (100) is connected to the low-pressure manifold (920); The fracturing system further comprises a flow detection element (720), which is connected to the low-pressure manifold (920) and is located upstream of the sand mixing device (100).

15. The fracturing system of claim 13, wherein: The fracturing system further comprises a liquid level detection element (730), wherein the liquid level detection element (730) is connected to the sand mixing device (100); And / or, the fracturing system further comprises a first valve body (810), the first valve body (810) being connected to the high-pressure manifold (910) and being disposed adjacent to an outlet of the fracturing equipment (200); And / or, the fracturing device (200) further includes a second valve body (820) and a low-pressure manifold (920), wherein the second valve body (820) is connected to the low-pressure manifold (920) and is disposed adjacent to an inlet of the fracturing device (200); And / or, the fracturing device (200) further includes a third valve body (830) and a low-pressure manifold (920), wherein the third valve body (830) is connected to the low-pressure manifold (920) and is arranged adjacent to the outlet of the mixing device (300).

16. A safety control method for fracturing operations, wherein: include: The target device obtains target information related to the fracturing equipment; When the target information satisfies the target condition, the target device locks the target valve so that the target valve cannot be opened or closed.

17. The method according to claim 16, wherein: The target device acquires target information related to the fracturing device, including: the target device acquires a fracturing operation instruction for controlling the fracturing device; When the target information meets the target condition, the target device locks the target valve, including: the target device responds to the fracturing operation instruction, and during the process of controlling the fracturing operation of the fracturing device, the target device locks the target valve.

18. The method according to claim 16, wherein The target information includes: the displacement or pressure of the fracturing equipment, When the target information meets the target condition, the target device locks the target valve, including: when the displacement of the fracturing equipment is greater than 0, or when the pressure of the fracturing equipment is greater than 0, the target device locks the target valve.

19. The method according to any one of claims 16 to 18, wherein: Before the target device acquires target information related to the fracturing equipment, the method further includes: The target device performs a control operation on the target valve; During the control operation of the target valve, the target device locks the fracturing device so that the fracturing device cannot perform a fracturing operation; After the control operation on the target valve is completed, the target device unlocks the fracturing device.

20. The method according to any one of claims 16 to 18, wherein: The target device locks the target valve, including: The target device sends a valve locking instruction to the valve feedback device, wherein the valve locking instruction is used to instruct the target valve to be locked; The target device receives locking completion information sent by the valve feedback device after locking the target valve.

21. The method according to claim 20, wherein The valve feedback device is wirelessly connected to the target device, and is used to control the opening and closing of the target valve. Each valve feedback device has a unique IP address; the target valve includes a first valve arranged at the wellhead, and / or a second valve arranged at the manifold.

22. The method according to any one of claims 16 to 18, wherein: The number of the target valves is M, where M is an integer greater than 1; the target device locks the target valve, including: The target device locks each target valve in turn according to the preset operation sequence of the M target valves.

23. The method according to claim 22, wherein Before the target device acquires target information related to the fracturing equipment, the method further includes: The target device acquires a configured well site layout; The target device sets the type and operation sequence of the target valves in the well site layout, and the types include operable valves and inoperable valves; the inoperable valves are valves whose opening or closing during the operation process will cause operation failure or a safety accident, and the operable valves include valves that do not affect the operation, or valves used for emergency treatment.

24. A target device, wherein: The method comprises a memory and a processor, wherein the memory stores a program or instruction running on the processor, and when the program or instruction is executed by the processor, the steps of the method according to any one of claims 16 to 23 are implemented.

25. A fracturing operation control system, wherein: It comprises a fracturing device, a manifold, a target valve and a target device according to claim 24, wherein the target device is connected to the fracturing device, and the fracturing device is connected to the manifold.

26. A fracturing fluid supply device, wherein: It includes a liquid replenishing device, a base liquid container, a sand mixing device and a control device, wherein: The liquid replenishing device is communicated with the inlet of the base liquid container, the outlet of the base liquid container is communicated with the sand mixing device, and the outlet of the base liquid container is provided with a sand mixing control valve; The base liquid container is provided with a liquid level detection component, and the liquid level detection component and the liquid replenishing device are both connected to the control device. When the detection value of the liquid level detection component is less than a first preset value, the control device controls the liquid replenishing device to open to replenish base liquid into the base liquid container.

27. The fracturing fluid supply equipment according to claim 26, wherein: The sand mixing device and the sand mixing control valve are both connected to the control device, and the control device is also used to control the opening and closing of the sand mixing device and the sand mixing control valve.

28. The fracturing fluid supply equipment according to claim 26, wherein: The liquid replenishing device includes a liquid storage container and a mixing device, the liquid storage container is connected to the mixing device via a connecting pipeline, the connecting pipeline is provided with a mixing control valve, the mixing device is connected to the inlet of the base liquid container, and the mixing device and the mixing control valve are both connected to the control device; When the detection value of the liquid level detection element is less than a first preset value, the control device controls the mixing control valve to open and controls the mixing device to operate, so as to replenish the base liquid into the base liquid container.

29. The fracturing fluid supply equipment according to claim 28, wherein: The base liquid container includes a first base liquid container and a second base liquid container, the sand mixing control valve includes a first control valve and a third control valve, and the liquid level detection element includes a first detection element and a second detection element. The first base liquid container is used to contain a first base liquid, and the second base liquid container is used to contain a second base liquid. The first detection member is provided in the first base liquid container, the second detection member is provided in the second base liquid container, the inlets of the first base liquid container and the second base liquid container are both connected to the mixing device, and the outlets of the first base liquid container and the second base liquid container are both connected to the sand mixing device; The inlets of the first base liquid container and the second base liquid container are provided with a second control valve and a fourth control valve, respectively. The outlets of the first base liquid container and the second base liquid container are provided with a first control valve and a third control valve, respectively. The first control valve, the second control valve, the third control valve and the fourth control valve are all connected to the control device. When the detection value of the first detection member is less than the first preset value, the control device controls the mixing control valve and the second control valve to open, and controls the mixing device to operate, so as to replenish the first base liquid container with the first base liquid; when the detection value of the second detection member is less than the first preset value, the control device controls the mixing control valve and the fourth control valve to open, and controls the mixing device to operate, so as to replenish the second base liquid container with the second base liquid.

30. The fracturing fluid supply equipment according to claim 28, wherein: The base liquid container includes a first base liquid container and a second base liquid container, the sand mixing control valve includes a first control valve and a third control valve, and the liquid level detection member includes a first detection member and a second detection member. The bottom of the first base liquid container and the bottom of the second base liquid container are connected to each other, and both are used to contain the first base liquid; The first detection member is provided in the first base liquid container, the second detection member is provided in the second base liquid container, the inlets of the first base liquid container and the second base liquid container are both connected to the mixing device, and the outlets of the first base liquid container and the second base liquid container are both connected to the sand mixing device; The inlets of the first base liquid container and the second base liquid container are provided with a second control valve and a fourth control valve respectively, and the outlets of the first base liquid container and the second base liquid container are provided with a first control valve and a third control valve respectively, and the first control valve, the second control valve, the third control valve and the fourth control valve are all connected to the control device; When the detection value of at least one of the first detection member and the second detection member is less than the first preset value, the control device controls the mixing control valve, the second control valve and the fourth control valve to open, and controls the mixing device to operate to replenish the first base liquid container and the second base liquid container with the first base liquid.

31. A control method for the fracturing fluid supply equipment according to claim 26, wherein: The control method includes: Obtaining the actual liquid level in the base liquid container; When the actual liquid level is less than a first preset value, the liquid replenishing device is controlled to open to replenish base liquid into the base liquid container.

32. The control method according to claim 31, wherein: The sand mixing device and the sand mixing control valve are both connected to the control device. In the control method, When the actual liquid level is less than a first preset value, controlling the liquid replenishing device to open to replenish the base liquid into the base liquid container comprises: When the sand mixing device is in a shutdown state and the actual liquid level is less than a first preset value, the liquid replenishing device is controlled to open to replenish base liquid into the base liquid container until the actual liquid level reaches a second preset value, wherein the second preset value is greater than the first preset value.

33. The control method according to claim 31, wherein: The liquid replenishing device includes a liquid storage container and a mixing device, the liquid storage container is connected to the mixing device via a connecting pipeline, the connecting pipeline is provided with a mixing control valve, the mixing device is connected to the inlet of the base liquid container, the mixing device and the mixing control valve are both connected to the control device, in the control method: When the actual liquid level is less than a first preset value, controlling the liquid replenishing device to open to replenish the base liquid into the base liquid container comprises: When the actual liquid level is less than a first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to operate, so as to replenish the base liquid into the base liquid container.

34. The control method according to claim 33, wherein: The sand mixing device and the sand mixing control valve are both connected to the control device, and in the control method: When the actual liquid level is less than a first preset value, controlling the mixing control valve to open and controlling the mixing device to operate so as to replenish the base liquid into the base liquid container comprises: When the sand mixing device is in operation and the actual liquid level is less than a first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to mix the base liquid at a first preset power, wherein the base liquid replenishment efficiency when the mixing device operates at the first preset power is equal to the base liquid consumption efficiency of the sand mixing device.

35. The control method according to claim 33, wherein: The sand mixing device and the sand mixing control valve are both connected to the control device, and in the control method: When the actual liquid level is less than the first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to operate so as to replenish the base liquid into the base liquid container, and the method further includes: Obtaining the working status of the sand mixing device; When the actual liquid level is less than a first preset value, controlling the mixing control valve to open and controlling the mixing device to operate so as to replenish the base liquid into the base liquid container comprises: When the sand mixing device is in a stopped state and the actual liquid level is less than a first preset value, controlling the mixing control valve to open, and controlling the mixing device to mix the base liquid at a second preset power to replenish the base liquid into the base liquid container; When the sand mixing device is in operation and the actual liquid level is less than a first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to mix the base liquid at a power greater than the second preset power to replenish the base liquid into the base liquid container.

36. The control method according to claim 33, wherein: The base liquid container includes a first base liquid container and a second base liquid container, the sand mixing control valve includes a first control valve and a third control valve, and the liquid level detection element includes a first detection element and a second detection element. The first base liquid container is used to contain a first base liquid, and the second base liquid container is used to contain a second base liquid. The first detection member is provided in the first base liquid container, the second detection member is provided in the second base liquid container, the inlets of the first base liquid container and the second base liquid container are both connected to the mixing device, and the outlets of the first base liquid container and the second base liquid container are both connected to the sand mixing device; The inlets of the first base liquid container and the second base liquid container are provided with a second control valve and a fourth control valve, respectively. The outlets of the first base liquid container and the second base liquid container are provided with a first control valve and a third control valve, respectively. The first control valve, the second control valve, the third control valve and the fourth control valve are all connected to the control device. In the control method: The obtaining of the actual liquid level in the base liquid container includes: Acquiring a first actual liquid level in the first base liquid container and a second actual liquid level in the second base liquid container; When the actual liquid level is less than a first preset value, controlling the mixing control valve to open and controlling the mixing device to operate so as to replenish the base liquid into the base liquid container comprises: When the first actual liquid level is less than a first preset value, controlling the mixing control valve to open and controlling the mixing device to operate so as to replenish the first base liquid into the first base liquid container; When the second actual liquid level is less than the first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to operate, so as to replenish the second base liquid into the second base liquid container.

37. The control method according to claim 33, wherein: The base liquid container includes a first base liquid container and a second base liquid container, the sand mixing control valve includes a first control valve and a third control valve, and the liquid level detection member includes a first detection member and a second detection member. The bottom of the first base liquid container and the bottom of the second base liquid container are connected to each other, and both are used to contain the first base liquid; The first detection member is provided in the first base liquid container, the second detection member is provided in the second base liquid container, the inlets of the first base liquid container and the second base liquid container are both connected to the mixing device, and the outlets of the first base liquid container and the second base liquid container are both connected to the sand mixing device; The inlets of the first base liquid container and the second base liquid container are provided with a second control valve and a fourth control valve in sequence, and the outlets of the first base liquid container and the second base liquid container are provided with a first control valve and a third control valve in sequence, and the first control valve, the second control valve, the third control valve and the fourth control valve are all connected to the control device; in the control method: The obtaining of the actual liquid level in the base liquid container includes: Acquiring a first actual liquid level in the first base liquid container and a second actual liquid level in the second base liquid container; When the actual liquid level is less than a first preset value, controlling the mixing control valve to open and controlling the mixing device to operate so as to replenish the base liquid into the base liquid container comprises: When at least one of the first actual liquid level and the second actual liquid level is less than a first preset value, the mixing control valve is controlled to open, and the mixing device is controlled to operate to replenish the first base liquid container and the second base liquid container with the first base liquid.

38. A feeding device, wherein: The invention comprises a feeding device (1100), a mixing device (1200), a sensing device (1300) and an adjusting device (1400), wherein the outlet of the feeding device (1100) is connected to the inlet of the mixing device (1200), the sensing device (1300) is arranged on the mixing device (1200) to detect the amount of material in the mixing device (1200), the adjusting device (1400) is connected to the feeding device (1100) to adjust the amount of material supplied at the outlet of the feeding device (1100), and the sensing device (1300) is in communication connection with the adjusting device (1400). When the material quantity in the mixing device (1200) detected by the sensing device (1300) does not reach a preset material quantity range, the regulating device (1400) regulates the material supply quantity at the outlet end of the feeding device (1100).

39. The feeding device according to claim 38, wherein The feeding device (1100) comprises a storage device (1110), wherein the storage device (1110) is provided with a discharge port (1111), wherein the discharge port (1111) is communicated with the inlet end of the mixing device (1200), and the regulating device (1400) is connected to the storage device (1110) to regulate the opening of the discharge port (1111). When the amount of material in the mixing device (1200) detected by the sensing device (1300) is less than the first amount of material, the regulating device (1400) increases the opening of the discharge port (1111) to increase the discharge amount of the discharge port (1111); When the amount of material in the mixing device (1200) detected by the sensing device (1300) is greater than the second amount of material, the regulating device (1400) reduces the opening of the discharge port (1111) to reduce the discharge amount of the discharge port (1111); Wherein, the first material amount is smaller than the second material amount.

40. The feeding device according to claim 39, wherein The regulating device (1400) includes a valve plate (1410) and a first driving member (1420). The valve plate (1410) is movably disposed at the discharge port (1111) to adjust the opening of the discharge port (1111). The first driving member (1420) is connected to the valve plate (1410) to drive the valve plate (1410) to move relative to the discharge port (1111). The first driving member (1420) is in communication with the sensing device (1300). When the amount of material in the mixing device (1200) detected by the sensing device (1300) is less than the first amount of material, the first driving member (1420) drives the valve plate (1410) to move in a first direction to increase the opening of the discharge port (1111); When the amount of material in the mixing device (1200) detected by the sensing device (1300) is greater than the second amount of material, the first driving member (1420) drives the valve plate (1410) to move in a second direction to reduce the opening of the discharge port (1111); The first direction is opposite to the second direction.

41. The feeding device according to claim 39, wherein The feeding device (1100) further comprises a feeding device (1120), wherein the inlet end of the feeding device (1120) is communicated with the discharge port (1111), and the outlet end of the feeding device (1120) is communicated with the inlet end of the mixing device (1200). The regulating device (1400) is connected to the feeding device (1120) to regulate the feeding speed of the feeding device (1120). When the amount of material in the mixing device (1200) detected by the sensing device (1300) is less than the first amount of material, the regulating device (1400) increases the feeding speed of the feeding device (1120); In the case where the amount of material in the mixing device (1200) detected by the sensing device (1300) is greater than the second amount of material, the regulating device (1400) reduces the feeding speed of the feeding device (1120).

42. The feeding device according to claim 41, wherein The feeding device (1120) includes a second driving member (1121) and a feeding member (1122). The second driving member (1121) is connected to the feeding member (1122). The second driving member (1121) can drive the feeding member (1122) to move so that the feeding member (1122) conveys materials. The second driving member (1121) is in communication with the regulating device (1400). When the amount of material in the mixing device (1200) detected by the sensing device (1300) is less than the first amount of material, the regulating device (1400) regulates the second driving member (1121) so as to increase the speed at which the second driving member (1121) drives the material feeding member (1122) to move; When the amount of material in the mixing device (1200) detected by the sensing device (1300) is greater than the second amount of material, the adjusting device (1400) adjusts the second driving member (1121) so as to reduce the speed at which the second driving member (1121) drives the feeding member (1122) to move.

43. The feeding device according to claim 41, wherein The feeding device further comprises a flow detection element (1510), wherein the flow detection element (1510) is arranged on the feeding device (1120), and the flow detection element (1510) is in communication connection with the regulating device (1400). When the flow detection element (1510) detects that the flow rate of the feeding device (1120) does not reach a preset flow rate range, the regulating device (1400) regulates the feeding speed of the feeding device (1120).

44. The feeding device according to claim 39, wherein The feeding device further comprises a second material level detection element (1520), wherein the second material level detection element (1520) is arranged on the material storage device (1110) to detect the material level of the material storage device (1110); And / or, the feeding device further comprises a second weighing sensor (1530), wherein the second weighing sensor (1530) is arranged at the bottom of the storage device (1110) to detect the weight of the storage device (1110); And / or, the feeding device further comprises a humidity detection element (1540), wherein the humidity detection element (1540) is arranged in the mixing device (1200) to detect the humidity of the material in the mixing device (1200); And / or, the feeding device further includes a camera device (1550), and the camera device (1550) is arranged in the mixing device (1200) to detect the state of the material in the mixing device (1200).

45. The feeding device according to claim 38, wherein The sensing device (1300) comprises a first material level detection element (1310), the first material level detection element (1310) being arranged on the mixing device (1200) to detect the material level of the mixing device (1200), the first material level detection element (1310) being in communication connection with the regulating device (1400), When the material level in the mixing device (1200) detected by the first material level detection element (1310) is lower than a first material level, the regulating device (1400) increases the supply amount at the outlet end of the feeding device (1100); When the material level in the mixing device (1200) detected by the first material level detection element (1310) is higher than a second material level, the regulating device (1400) reduces the supply amount at the outlet end of the feeding device (1100); Wherein, the first material level is smaller than the second material level.

46. The feeding device according to claim 38, wherein The sensing device (1300) includes a first weighing sensor (1320), the first weighing sensor (1320) being arranged at the bottom of the mixing device (1200) to detect the weight of the mixing device (1200), the first weighing sensor (1320) being in communication connection with the regulating device (1400), When the weight of the mixing device (1200) detected by the first weighing sensor (1320) is less than a first weight, the regulating device (1400) increases the supply amount at the outlet end of the feeding device (1100); When the weight of the mixing device (1200) detected by the first weighing sensor (1320) is greater than a second weight, the regulating device (1400) reduces the supply amount at the outlet end of the feeding device (1100); Wherein, the first weight is less than the second weight.

47. A feeding control method, wherein: include: Detecting the amount of material in the mixing device (1200); When the material amount in the mixing device (1200) is less than the first material amount, the regulating device (1400) is controlled to increase the material supply amount at the outlet end of the feeding device (1100); When the material amount in the mixing device (1200) is greater than the second material amount, controlling the regulating device (1400) to reduce the material supply amount at the outlet end of the feeding device (1100); Wherein, the first material amount is smaller than the second material amount.

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