Control method for fracturing system, fracturing system, safety control method for fracturing operation, target device, fracturing operation control system, fracturing fluid supplying device and control method therefor, material supplying device, and material supplying control method

Abstract

A control method for a fracturing system, a fracturing system, a safety control method for a fracturing operation, a target device, a fracturing operation control system, a fracturing fluid supplying device and a control method therefor, a material supplying device, and a material supplying control method, and belongs to the field of oilfield equipment. The control method for the fracturing system includes: detecting an actual pressure value of a fracturing fluid with proppant at a wellhead; controlling a flowrate of the fracturing fluid with proppant to remain unchanged when the actual pressure value does not exceed a preset pressure value; and controlling to decrease the flowrate of the fracturing fluid with proppant when the actual pressure value exceeds the preset pressure value, so that the actual pressure value returns to below the preset pressure value.

Description

CONTROL METHOD FOR FRACTURING SYSTEM, FRACTURING SYSTEM, SAFETY CONTROL METHOD FOR FRACTURING OPERATION, TARGET DEVICE, FRACTURING OPERATION CONTROL SYSTEM, FRACTURING FLUID SUPPLYING DEVICE AND CONTROL METHOD THEREFOR, MATERIAL SUPPLYING DEVICE, AND MATERIAL SUPPLYINGCONTROL METHODCROSS-REFERENCE TO RELATED APPLICATIONS[1] This application claims priority to Chinese Patent Application No. 202410149113.1 filed to China National Intellectual Property Administration on January 31, 2024, titled "FRACTURING FLUID SUPPLYING DEVICE AND CONTROL METHOD THEREFOR", Chinese Patent Application No. 202410148236.3 filed to China National Intellectual Property Administration on January 31, 2024, titled "SAFETY CONTROL METHOD FOR FRACTURING OPERATION, TARGET DEVICE, AND FRACTURING OPERATION CONTROL SYSTEM", Chinese Patent Application No. 202410149098.0 filed to China National Intellectual Property Administration on January 31, 2024, titled "CONTROL METHOD FOR FRACTURING SYSTEM AND FRACTURING SYSTEM", and Chinese Patent Application No. 202410148242.9 filed to China National Intellectual Property Administration on January 31, 2024, titled "MATERIAL SUPPLYING DEVICE AND MATERIAL SUPPLYING CONTROL METHOD". The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties.TECHNICAL FIELD[2] The present application belongs to the technical field of oilfield equipment, and in particular to a control method for a fracturing system, a fracturing system, a safety control method for a fracturing operation, a target device, a fracturing operation control system, a fracturing fluid supplying device and a control method therefor, a material supplying device, and a material supplying control method.Background[3] Fracturing operation is an effective production increase measure commonly used on oilfield sites at present. A fracturing operation truck group usually includes several to more than twenty fracturing devices and proppant blending devices. The proppant blending devices play a role of mixing a base fluid and fracturing proppant to feed a fluid to the fracturing devices in the entire truck group. The fracturing devices are configured for pressurizing a fracturing mixed fluid to meet the needs of fracturing operations. Both are key devices of the fracturing truck group.[4] At present, each device in some fracturing truck groups in the market adopt single machine control. When abnormal working conditions occur in the fracturing operation, it is difficult to provide timely feedback of abnormal signals, thus affecting the normal fracturing operation process.Summary[5] An objective of an embodiment of the present application is to provide a control method for a fracturing system, and a fracturing system.[6] An embodiment of the present application provides a control method for a fracturing system. The control method includes: detecting an actual pressure value of a fracturing fluid with proppant at a wellhead; controlling a flowrate of the fracturing fluid with proppant to remain unchanged when the actual pressure value does not exceed a preset pressure value; and controlling to decrease the flowrate of the fracturing fluid with proppant when the actual pressure value exceeds the preset pressure value, so that the actual pressure value returns to below the preset pressure value.[7] The present application further provides a fracturing system adopting the above control method for the fracturing system. The fracturing system includes: a fracturing device, a proppant blending device, a high-pressure manifold, a control center, and a pressure detection element, where an inlet of the fracturing device is in fluid communication with an outlet of the proppant blending device, an outlet of the fracturing device is in fluid communication with the high-pressure manifold, and the high-pressure manifold is configured for outputting the fracturing fluid with proppant; the pressure detection element is provided on the high-pressure manifold; and the control center is electrically connected to the fracturing device, the proppant blending device, and the pressure detection element respectively.[8] The present application further provides a safety control method for a fracturing operation. The safety control method for the fracturing operation includes: acquiring, by a target device, target information related to a fracturing device; and locking, by the target device, a target valve when the target information satisfies a target condition, so that an opening or closing operation is unable to be performed on the target valve.[9] The present application further provides a target device. The target device includes: a memory and a processor, where the memory stores programs or instructions running on the processor, and when the programs or the instructions are executed by the processor, the processor implements steps of the safety control method for a fracturing operation as described above.

[10] The present application further provides a fracturing operation control system. The fracturing operation control system includes: a fracturing device, a manifold, a target valve, and the target device as described above, where the target device is connected to the fracturing device, and the fracturing device is connected to the manifold.

[11] The present application further provides a fracturing fluid supplying device. The fracturing fluid supplying device includes: a fluid replenishment apparatus, a base fluid container, a proppant mixing apparatus, and a control apparatus, where the fluid replenishment apparatus is in fluid communication with an inlet of the base fluid container, an outlet of the base fluid container is in fluid communication with the proppant mixing apparatus, and the outlet of the base fluid container is provided with a proppant mixing control valve; and the base fluid container is provided with a fluid level detection element, the fluid level detection element and the fluid replenishment apparatus are both connected to the control apparatus, and the control apparatus controls the fluid replenishment apparatus to open to replenish base fluid into the base fluid container when a detection value of the fluid level detection element is less than a first preset value.

[12] The present application further provides a control method applied to the above fracturing fluid supplying device. The control method includes: acquiring an actual fluid level in the base fluid container; and controlling the fluid replenishment apparatus to open to replenish the base fluid into the base fluid container when the actual fluid level is less than the first preset value.

[13] The present application further provides a material supplying device. The material supplying device includes: a material supplying apparatus, a material mixing apparatus, a sensing apparatus, and an adjustment apparatus, where an outlet end of the material supplying apparatus is in fluid communication with an inlet end of the material mixing apparatus, the sensing apparatus is provided on the material mixing apparatus to detect a material amount in the material mixing apparatus, the adjustment apparatus is connected to the material supplying apparatus to adjust a material supplying amount at the outlet end of the material supplying apparatus, the sensing apparatus is communicatively connected to the adjustment apparatus, and the adjustment apparatus adjusts the material supplying amount at the outlet end of the material supplying apparatus when the material amount in the material mixing apparatus detected by the sensing apparatus does not reach a preset material amount range.

[14] The present application further provides a material supplying control method. The material supplying method includes: detecting a material amount in a material mixing apparatus; controlling an adjustment apparatus to adjust up a material supplying amount at an outlet end of a material supplying apparatus when the material amount in the material mixing apparatus is less than a first material amount; and controlling the adjustment apparatus to adjust down the material supplying amount at the outlet end of the material supplying apparatus when the material amount in the material mixing apparatus is greater than a second material amount, where the first material amount is less than the second material amount.BRIEF DESCRIPTION OF DRAWINGS

[15] FIG. 1 is a flowchart of a control method for a fracturing system disclosed in an embodiment of the present application.

[16] FIG. 2 is a schematic diagram of a multi-level protection control logic disclosed in an embodiment of the present application.

[17] FIG. 3 is a schematic diagram of multiple parameters set in a control center disclosed in an embodiment of the present application.

[18] FIG. 4 is a schematic structural diagram of a fracturing system disclosed in an embodiment of the present application.

[19] FIG. 5 is a flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application.

[20] FIG. 6 is a flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application.

[21] FIG. 7 is a flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application.

[22] FIG. 8 is a flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application.

[23] FIG. 9 is a flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application.

[24] FIG. 10 is a schematic diagram of a safety control method for a fracturing operation provided in an embodiment of the present application.

[25] FIG. 11 is a complete flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application;

[26] FIG. 12 is a structural block diagram of a safety control apparatus for a fracturing operation provided in an embodiment of the present application.

[27] FIG. 13 is a structural block diagram of a target device provided in an embodiment of the present application.

[28] FIG. 14 is a structural block diagram of a fracturing operation control system provided in an embodiment of the present application.

[29] FIG. 15 is a schematic structural diagram of a fracturing fluid supplying device disclosed in an embodiment of the present application.

[30] FIG. 16 is a flowchart of a control method for a fracturing fluid supplying device disclosed in an embodiment of the present application.

[31] FIG. 17 is a schematic structural diagram of a material supplying device disclosed in an embodiment of the present application.

[32] FIG. 18 is a schematic structural diagram of a material supplying device disclosed in another embodiment of the present application.

[33] FIG. 19 is a flowchart of a material supplying method disclosed an embodiment of the present application.

[34] Description of reference signs:100-proppant blending device; 200-fracturing device; 300-hydration device; 400-proppant conveying device; 500-wellhead; 600-control center; 710-pressure detection element; 720-flow rate detection element; 730-fluid level detection element; 1810-first valve body; 1820-second valve body; 830-third valve body; 1910-high-pressure manifold; 1920-low-pressure manifold;0100-fluid storage container, 0200-hydration apparatus, 0310-first base fluid container, 0320-second base fluid container, 0330-third base fluid container, 0340-fourth base fluid container, 0400-proppant mixing apparatus, 0500-control apparatus, 0610-first detector, 0620-second detector, 0630-third detector, 0640-fourth detector, 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 fluid supplying device, and 0930-downstream device; 1100-material supplying apparatus, 1110-material storage apparatus, 1111-discharge outlet, 1120-material conveying apparatus, 1121-second driver, 1122-material conveyor, 1200-material mixing apparatus, 1300-sensing apparatus, 1310-first material level detection element, 1320-first weighing sensor, 1400-adjustment apparatus, 1410-valve plate, 1420-first driver, 1510-flow rate detection element, 1520-second material level detection element, 1521-range 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 apparatus, 1560-material level switch, and 1600-control apparatus.Detaled DESCRIPTION OF EMBODIMENTS

[35] Technical implementations of embodiments of the present application will be described below with reference to the drawings of embodiments of the present application. Obviously, the present disclosure describes only some, rather than all, embodiments of the present application. Other embodiments obtained by a person of ordinary skill in the art based on embodiments described in the present application without inventive efforts all fall within the protection scope of the present application.

[36] Terms such as "first" and "second" in the description and claims of the present application are configured for distinguishing similar objects, instead of describing a specific order or sequence. It is to be understood that data used in this way are exchangeable in a proper case, so that the embodiments of the present application can be implemented in an order different from the order shown or described herein; and the objects distinguished by "first", "second" and the like are usually of the same class and do not limit the number of the objects, for example, the number of first objects may be one or more. In addition, "and / or" in the description and claims represents at least one of the connected objects. Character " / " generally represents an "or" relationship between the associated objects.

[37] Embodiments of the present application will be described below in detail through specific embodiments and their application scenarios with reference to the drawings.

[38] Referring to FIG. 1 to FIG. 4, an embodiment of the present application discloses a control method for a fracturing system. The disclosed control method includes:detecting an actual pressure value of a fracturing fluid with proppant at a wellhead 500;controlling to maintain a flowrate of the fracturing fluid with the proppant unchanged when the actual pressure value does not exceed a preset pressure value; andcontrolling to decrease the flowrate of the fracturing fluid with the proppant when the actual pressure value exceeds the preset pressure value, so that the actual pressure value does not exceed the preset pressure value.

[39] In this embodiment of the present application, the actual pressure value detected at the wellhead 500 may be compared with the preset pressure value, so as to automatically adjust the flowrate of the fracturing fluid with proppant according to the actual pressure value. Specifically, the flowrate of the fracturing fluid with the proppant is controlled to remain unchanged when the actual pressure value does not exceed the preset pressure value; and the flowrate of the fracturing fluid with proppant is controlled to decrease when the actual pressure value exceeds the preset pressure value, so as to decrease the pressure at the wellhead 500, thus making the actual pressure value not exceed the preset pressure value and ensuring that the pressure at the wellhead 500 is not too high.

[40] Based on the above configuration, this embodiment of the present application can achieve association and linkage between upstream equipment and downstream equipment, so that when an abnormality occurs downstream, an abnormal signal can be fed back to the upstream equipment to achieve adaptive adjustment of the upstream equipment, thus effectively addressing the abnormality issue and ensuring normal fracturing operation.

[41] Optionally, a pressure detection element 710 may be installed at the wellhead 500, or the pressure detection element 710 may be installed at a position of a pipeline (i.e., a high-pressure manifold 1910) connected to the wellhead 500, so as to facilitate real-time monitoring of an actual pressure value of the fracturing fluid with proppant inputted to the wellhead 500, and lay a foundation for subsequent adjustment of the flowrate of the fracturing fluid with proppant.

[42] The preset pressure value is a pressure reference value (i.e., a pressure protection value) set in a control center 600. Whether the flowrate of the fracturing fluid with proppant needs to be adjusted is determined according to a relationship between the detected actual pressure value and the preset pressure value. Of course, not only one preset pressure value, but also multiple preset pressure values may be set in the control center 600, so as to compare the detected actual pressure value with each preset pressure value, thus achieving multi-level adjustment and control of the flowrate of the fracturing fluid with proppant according to multi-level pressure comparison.

[43] Optionally, the flowrate of the fracturing fluid with proppant is controlled to decrease by a first amplitude when the actual pressure value exceeds the preset pressure value and does not exceed a first pressure protection value, where the first pressure protection value is greater than the preset pressure value. Based on this, when the flowrate of the fracturing fluid with proppant is decreased by the first amplitude, the pressure at the wellhead 500 may be appropriately reduced, so that the actual pressure value detected at the wellhead 500 can be reduced and returned to a range not exceeding the preset pressure value, thus ensuring that the fracturing operation can be performed normally.

[44] Here, it is to be noted that a difference between the first pressure protection value and the preset pressure value may be relatively small. In this case, the flowrate of the fracturing fluid with the proppant may be decreased by a relatively small first amplitude, thus not only alleviating the problem of over-pressure at the wellhead 500, but also ensuring sufficient supply of the fracturing fluid with proppant into the wellhead 500 and performance of the fracturing operation. In addition, when used to describe embodiments of the present application, “not exceeding” may be understood as less than or equal to, and “exceeding” may be understood as greater than.

[45] Exemplarily, the preset pressure value may be set to 80 MPa, and the first pressure protection value may be set to 84 MPa. Of course, both values may also be respectively set to other values, which are not specifically limited here.

[46] As the actual pressure value detected at the wellhead 500 increases, the flowrate of the fracturing fluid with proppant may be controlled to decrease by a second amplitude when the actual pressure value exceeds the first pressure protection value and does not exceed an upper limit pressure protection value, where the upper limit pressure protection value is greater than the first pressure protection value. Based on this, when the flowrate of the fracturing fluid with proppant is decreased by the second amplitude, the pressure at the wellhead 500 may be appropriately reduced, so that the actual pressure value detected at the wellhead 500 can be reduced and returned to a range not exceeding the preset pressure value, thus ensuring that the fracturing operation can be performed normally.

[47] Here, it is to be noted that a difference between the upper limit pressure protection value and the preset pressure value may be relatively large. In this case, a large second amplitude may be used to decrease the flowrate of the fracturing fluid with proppant, thus not only alleviating the problem of an excessive pressure at the wellhead 500, but also ensuring that a sufficient fracturing fluid with proppant can be inputted into the wellhead 500 and ensuring that the fracturing operation can be performed.

[48] 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.

[49] It is considered that the difference between the upper limit pressure protection value and the preset pressure value is relatively large, multiple levels of pressure protection values may also be set between the preset pressure value and the upper limit pressure protection value, so as to achieve multi-level control.Optionally, four levels of pressure protection values may be set between the preset pressure value and the upper limit pressure protection value, specifically including a first pressure protection value (i.e., a first-level pressure protection value), a second pressure protection value (i.e., a second-level pressure protection value), a third pressure protection value (i.e., a third-level pressure protection value), and a fourth pressure protection value (i.e., a fourth-level pressure protection value) that increase sequentially, and all four levels of pressure protection values are greater than the preset pressure value and less than the upper limit pressure protection value. Of course, other levels of pressure protection values may also be set, which may be selected according to the actual working conditions.

[50] 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.

[51] As the pressure value detected at the wellhead 500 continues to increase, supplying of fracturing fluid with proppant is controlled to stop when the actual pressure value exceeds the upper limit pressure protection value, thus preventing the pressure at the wellhead 500 from continuing to increase. Therefore, it can be ensured that the pressure value at the wellhead 500 will not exceed a safe range, thus ensuring the safety of the fracturing operation.

[52] Here, it is to be noted that controlling timing of stopping the supplying of the fracturing fluid with proppant is not limited, a pump may be stopped when the actual pressure value is greater than the first pressure protection value to a certain extent, or when the actual pressure value is greater than the second pressure protection value to a certain extent. Of course, it may also be stopped in other cases, which are not specifically limited here.

[53] In an embodiment of the present application, the controlling to decrease the flowrate of the fracturing fluid with proppant includes:controlling to decrease a numerical value of the flowrate or decreasing a percentage of the flowrate.

[54] Taking the decreasing a numerical value of the flowrate as an example:the flowrate may be decreased by 0.2 m3 / min when the actual pressure value is greater than the preset pressure value and does not exceed the first pressure protection value; the first amplitude may be set to 0.5 m3 / min and the flowrate may be decreased by this amplitude when the actual pressure value is greater than the first pressure protection value and less than the second pressure protection value; the flowrate may be decreased by 1.0 m3 / min when the actual pressure value is greater than the second pressure protection value and less than the third pressure protection value; the flowrate may be decreased by 2.0 m3 / min when the actual pressure value is greater than the third pressure protection value and less than the fourth pressure protection value; and the flowrate may be decreased by 4.0 m3 / min when the actual pressure value is greater than the fourth pressure protection value, and so on, until the actual pressure value exceeds the upper limit pressure protection value, at which the pump is stopped.

[55] Taking the decreasing a percentage of the flowrate as an example:the flowrate may be decreased by 1% of an original flowrate (i.e., a flowrate during normal fracturing operation) when the actual pressure value is greater than the preset pressure value and does not exceed the first pressure protection value; the first amplitude may be set to 2% and the flowrate may be decreased by this amplitude when the actual pressure value is greater than the first pressure protection value and less than the second pressure protection value; the flowrate may be decreased by 5% of the original flowrate when the actual pressure value is greater than the second pressure protection value and less than the third pressure protection value; the flowrate may be decreased by 10% of the original flowrate when the actual pressure value is greater than the third pressure protection value and less than the fourth pressure protection value; and the flowrate may be decreased by 20% of the original flowrate when the actual pressure value is greater than the fourth pressure protection value, and so on, until the actual pressure value exceeds the upper limit pressure protection value, at which the pump is stopped.

[56] Considering a fracturing fluid with proppant composed of a mixture comprising the fracturing fluid and fracturing proppant, the flowrate of the fracturing fluid with proppant is related to a flow rate of the fracturing fluid and a flow rate of the fracturing proppant respectively. Therefore, when the actual pressure value does not meet the requirement, the flow rate of the fracturing proppant may be also directly adjusted and controlled. By adjusting and controlling the flow rate of the fracturing proppant, a rate of generating the fracturing fluid with proppant can be adjusted and controlled, thus adjusting and controlling the flowrate of the fracturing fluid with proppant.

[57] Based on the above case, in an embodiment of the present application, the control method further includes:controlling a fracturing proppant amount supplied to fracturing fluid to remain unchanged when the actual pressure value does not exceed the preset pressure value; andcontrolling to decrease the fracturing proppant amount supplied to the fracturing fluid when the actual pressure value exceeds the preset pressure value.

[58] In this embodiment of the present application, the actual pressure value detected at the wellhead 500 may be compared with the preset pressure value, thus not only automatically adjusting the flowrate of the fracturing fluid with proppant according to the actual pressure value, but also automatically adjusting the fracturing proppant amount supplied to the fracturing fluid according to the actual pressure value, making the actual pressure value not exceed the preset pressure value, and ensuring that the pressure at the wellhead 500 is not too high.

[59] Here, it is to be noted that in an embodiment of the present application, the flowrate of the fracturing fluid with proppant may be adjusted separately according to the relationship between the actual pressure value and the preset pressure value, that is, a relationship between the difference between the actual pressure value and the preset pressure value, and the flowrate of the fracturing fluid with proppant, may be established. Of course, the flowrate of the fracturing fluid with proppant and the fracturing proppant amount supplied to the fracturing fluid may also be adjusted simultaneously according to the relationship between the actual pressure value and the preset pressure value, that is, a relationship between the difference between the actual pressure value and the preset pressure value, and the flowrate of the fracturing fluid with proppant, as well as the fracturing proppant amount supplied to fracturing fluid, may be established simultaneously.

[60] It is considered that one or more pressure protection values may be set between the actual pressure value and the preset pressure value, so as to achieve multi-level adjustment and control of the flowrate of the fracturing fluid with proppant and the proppant supplying amount of the fracturing proppant according to multi-level pressure comparison.

[61] Optionally, the fracturing proppant amount supplied to fracturing fluid is decreased by a third amplitude when the actual pressure value exceeds the preset pressure value and does not exceed a first pressure protection value, where the first pressure protection value is greater than the preset pressure value. Based on this, while the flowrate of the fracturing fluid with proppant is adjusted and controlled, the fracturing proppant amount supplied to fracturing fluid may also be decreased by a third amplitude, so as to appropriately reduce the pressure at the wellhead 500, so that the actual pressure value detected at the wellhead 500 can be reduced and returned to a range not exceeding the preset pressure value, thus ensuring that the fracturing operation can be performed normally.

[62] As the actual pressure value detected at the wellhead 500 increases, the fracturing proppant amount supplied to fracturing fluid may be controlled to decreased by a fourth amplitude when the actual pressure value exceeds the first pressure protection value and does not exceed an upper limit pressure protection value, where the upper limit pressure protection value is greater than the first pressure protection value. Based on this, while the flowrate of the fracturing fluid with proppant is adjusted and controlled, the fracturing proppant amount supplied to fracturing fluid may be decreased by a fourth amplitude to appropriately reduce the pressure at the wellhead 500, so that the actual pressure value detected at the wellhead 500 can be reduced and returned to a range not exceeding the preset pressure value, thus ensuring that the fracturing operation can be performed normally.

[63] As the pressure value detected at the wellhead 500 continues to increase, supplying of the fracturing proppant is controlled to stop when the actual pressure value exceeds the upper limit pressure protection value, thus preventing the pressure at the wellhead 500 from continuing to increase. Therefore, it can be ensured that the pressure value at the wellhead 500 will not exceed a safe range, thus ensuring the safety of the fracturing operation.

[64] Here, it is to be noted that controlling the timing of stopping the supplying of the fracturing fluid with proppant is not limited, a pump may be stopped when the actual pressure value is greater than the first pressure protection value to a certain extent, or when the actual pressure value is greater than the second pressure protection value to a certain extent. Of course, it may also be stopped in other cases, which are not specifically limited here.

[65] In an embodiment of the present application, the controlling to decrease the fracturing proppant amount supplied to fracturing fluid includes:controlling to decrease a proppant ratio of the fracturing proppant or decreasing a concentration value of the fracturing proppant.

[66] Taking the decreasing a proppant ratio of the fracturing proppant as an example:the fracturing proppant amount supplied to fracturing fluid may be decreased by a proppant ratio of 2% when the actual pressure value is greater than the preset pressure value and does not exceed the first pressure protection value; the fracturing proppant amount supplied to fracturing fluid may be decreased by a proppant ratio of 5% when the actual pressure value is greater than the first pressure protection value and less than the second pressure protection value; the fracturing proppant amount supplied to fracturing fluid may be decreased by a proppant ratio of 10% when the actual pressure value is greater than the second pressure protection value and less than the third pressure protection value; the fracturing proppant amount supplied to fracturing fluid may be decreased by a proppant ratio of 15% when the actual pressure value is greater than the third pressure protection value and less than the fourth pressure protection value; and the fracturing proppant amount supplied to fracturing fluid may be decreased by a proppant ratio of 20% when the actual pressure value is greater than the fourth pressure protection value, and so on, until the actual pressure value exceeds the upper limit pressure protection value, at which the supplying is stopped.

[67] Taking the decreasing a concentration value of the fracturing proppant as an example:the fracturing proppant amount supplied to fracturing fluid may be decreased by a concentration value of 30 kg / m3 when the actual pressure value is greater than the preset pressure value and does not exceed the first pressure protection value; the fracturing proppant amount supplied to fracturing fluid may be decreased by a concentration value of 60 kg / m3 when the actual pressure value is greater than the first pressure protection value and less than the second pressure protection value; the fracturing proppant amount supplied to fracturing fluid may be decreased by a concentration value of 120 kg / m3 when the actual pressure value is greater than the second pressure protection value and less than the third pressure protection value; the fracturing proppant amount supplied to fracturing fluid may be decreased by a concentration value of 180 kg / m3 when the actual pressure value is greater than the third pressure protection value and less than the fourth pressure protection value; and the fracturing proppant amount supplied to fracturing fluid may be decreased by a concentration value of 240 kg / m3 when the actual pressure value is greater than the fourth pressure protection value, and so on, until the actual pressure value exceeds the upper limit pressure protection value, at which the supplying is stopped.

[68] It is considered that the fracturing fluid with proppant is composed of a fracturing fluid and fracturing proppant, so that the flowrate of the fracturing fluid with proppant is related to the flow rate of the fracturing fluid and the flow rate of the fracturing proppant respectively. Therefore, when the actual pressure value does not meet the requirement, the flowrate of the fracturing fluid with proppant may also be directly adjusted and controlled, and the flow rate of the fracturing proppant is adjusted and controlled according to the flowrate of the fracturing fluid with proppant, so as to meet the actual requirement of the fracturing operation.

[69] Based on the above case, in an embodiment of the present application, the controlling to decrease the flowrate of the fracturing fluid with proppant may include:controlling to decrease a supplying amount of a fracturing fluid and a fracturing proppant amount supplied to fracturing fluid.

[70] Here, it is to be noted that when the actual pressure value detected at the wellhead 500 exceeds the preset pressure value, the feedback signal may be directly fed back to a fracturing device 200 and the flowrate of the fracturing device 200 needs to be adjusted. In addition, the fracturing device 200 may further provide feedback to an upstream hydration device 300 and a proppant conveying device 400 respectively to reduce the supplying amount of the fracturing fluid and the supplying amount of the fracturing proppant, causing a decrease in the amount of mixed raw materials received in the fracturing device 200, thus decreasing the flowrate of the fracturing device 200 and ultimately reducing the pressure value at the wellhead 500.

[71] Based on the above control method for a fracturing system, an embodiment of the present application further discloses a fracturing system adopting the above control method. As shown in FIG. 1 to FIG. 4, the disclosed fracturing system includes: a fracturing device 200, a proppant blending device 100, a high-pressure manifold 1910, a control center 600, and a pressure detection element 710.

[72] An inlet of the fracturing device 200 is in fluid communication with an outlet of the proppant blending device 100, an outlet of the fracturing device 200 is in fluid communication with the high-pressure manifold 1910, and the high-pressure manifold 1910 is configured for outputting the fracturing fluid with proppant, so as to make the fracturing fluid with proppant enter the wellhead 500 to achieve the fracturing operation.

[73] In addition, the pressure detection element 710 is provided on the high-pressure manifold 1910 to detect the pressure of the fracturing fluid with proppant in the high-pressure manifold 1910 in real time. Exemplarily, the pressure detection element 710 may be located at a position on the high-pressure manifold 1910 close to the wellhead 500, so as to reflect the pressure of the fracturing fluid with proppant in an area close to the wellhead 500.

[74] The control center 600 is configured for acquiring data from various devices on site, and various operation data, protection parameters and the like may also be set in the control center 600. To achieve a multi-level safety protection control function, multiple pressure protection values for the wellhead 500, multiple flowrate decrease values for the fracturing device 200, and multiple proppant amount decrease values for the proppant blending device 100 may be set in the control center 600, as shown in FIG. 4.

[75] In addition, for each level of pressure protection of the fracturing device 200, there are three options to choose, including flowrate keeping, flowrate decreasing, and pump stopping, which may be flexibly set according to the actual operation situation.

[76] For each level of pressure protection of the proppant blending device 100, there are three options to choose, including proppant amount keeping, proppant amount decreasing, and proppant supplying stopping, which may be flexibly set according to the actual operation situation.

[77] Specifically, the control center 600 is electrically connected to the fracturing device 200, the proppant blending device 100, and the pressure detection element 710 respectively, so that the control center 600 can receive a pressure signal detected by the pressure detection element 710, analyze and process the pressure signal, finally obtain a control signal, and send the control signals to the fracturing device 200, the proppant blending device 100 and the like, so as to adaptively and respectively control the flowrate of the fracturing device 200 and the proppant supplying amount of the proppant blending device 100 according to the detected pressure situation.

[78] Based on the above configuration, an embodiment of the present application can detect the actual pressure value of the fracturing fluid with proppant at a position in the high-pressure manifold 1910 close to the wellhead 500 in real time through the pressure detection element 710, and send the actual pressure value to the control center 600. Under the analysis and processing of the control center 600, the actual pressure value can be compared with the preset pressure value set in the control center 600.

[79] When the actual pressure value does not exceed the preset pressure value, the control center 600 controls the fracturing device 200 and the proppant blending device 100 to keep normal operation, and keeps the flowrate of the fracturing fluid with proppant unchanged;

[80] when the actual pressure value exceeds the preset pressure value, the control center 600 controls the fracturing device 200 to decrease the flowrate of the fracturing fluid with proppant, so that the actual pressure value returns to a range not exceeding the preset pressure value.

[81] Therefore, an embodiment of the present application can achieve the correlation between upstream and downstream devices, so that when an abnormality occurs downstream, the abnormal signal can be fed back to the upstream device to achieve adaptive adjustment of the upstream device, thus effectively solving the problem of abnormality and ensuring that the fracturing operation can be performed normally.

[82] In some embodiments, the fracturing system may further include a hydration device 300 and a proppant conveying device 400, where an outlet of the hydration device 300 is in fluid communication with an inlet of the proppant blending device 100 and is configured for conveying the fracturing fluid to the proppant blending device 100, and an outlet of the proppant conveying device 400 is in fluid communication with an inlet of the proppant blending device 100 and is configured for conveying the fracturing proppant to the proppant blending device 100.

[83] The hydration device 300 is configured for supplying the fracturing fluid to the proppant blending device 100, and the proppant conveying device 400 is configured for supplying the fracturing proppant to the proppant blending device 100. The proppant ratio is controlled by controlling the hydration device 300 and the proppant conveying device 400 to obtain the fracturing fluid with proppant that meets the requirement of the fracturing operation.

[84] In some embodiments, the fracturing system may further include a low-pressure manifold 1920, the hydration device 300 and the proppant conveying device 400 are both in fluid communication with an inlet of the low-pressure manifold 1920, an outlet of the low-pressure manifold1 920 is in fluid communication with the fracturing device 200, and the proppant blending device 100 is connected to the low-pressure manifold 1920. In this way, the fracturing fluid and the fracturing proppant can be respectively conveyed to the proppant blending device 100 through the low-pressure manifold 1920, mixed by the proppant blending device 100, and finally conveyed to the fracturing device 200, thus facilitating the subsequent injection into the wellhead 500.

[85] Further, the fracturing system may further include a flow rate detection element 720, and the flow rate detection element 720 is connected to the low-pressure manifold 1920 and located upstream of the proppant blending device 100. In this way, a flow rate of a fracturing material in the low-pressure manifold 1920 can be detected in real time through the flow rate detection element 720.

[86] Specifically, when the hydration device 300 conveys the fracturing fluid into the proppant blending device 100 through the low-pressure manifold 1920, the flow rate of the fracturing fluid conveyed to the proppant blending device 100 can be detected through the flow rate detection element 720; and when the proppant conveying device 400 conveys the fracturing proppant into the proppant blending device 100 through the low-pressure manifold 1920, the flow rate of the fracturing proppant conveyed to the proppant blending device 100 can be detected through the flow rate detection element 720. Therefore, the fracturing fluid and the fracturing proppant can enter the proppant blending device 100 according to a certain ratio, so that the fracturing fluid with proppant formed after mixing in the proppant blending device 100 can meet the requirement of the fracturing operation.

[87] In some embodiments, the fracturing system may further include a fluid level detection element 730, and the fluid level detection element 730 is connected to the proppant blending device 100, so as to detect the fluid level of the fracturing fluid with proppant in the proppant blending device 100 and prevent overflow caused by an excessive fluid level. Here, it should be noted that when the detected actual pressure value is high, adjustment and control are achieved through the flowrate decreasing and proppant amount decreasing, which will influence the fluid level in the proppant blending device 100.In this case, the fluid level in the proppant blending device 100 can be adjusted by adjusting the fluid supplying amount of the hydration device 300 and the proppant supplying amount of the proppant conveying device 400. Therefore, the fluid level in the proppant blending device 100 can be monitored in real time through the fluid level detection element 730, so as to adjust and control the fluid level in the proppant blending device 100, thus making the fluid level in the proppant blending device 100 relatively stable.

[88] The fracturing system may further include a first valve body 1810, the first valve body 1810 is connected to the high-pressure manifold 1910 and provided adjacent to the outlet of the fracturing device 200. In this way, the first valve body 1810 can be closed and the fracturing device 200 can be sealed when no fracturing operation is performed, so as to prevent the fracturing fluid with proppant in the fracturing device 200 from leaking. During the fracturing operation, the first valve body 1810 is opened to avoid obstructing the fracturing fluid with proppant. Exemplarily, the first valve body 1810 may be a starting valve, such as a pneumatic valve or an electric valve. Of course, it may also be a manual valve.

[89] The fracturing system may further include a second valve body 1820, and the second valve body 1820 is connected to the low-pressure manifold 1920 and provided adjacent to the inlet of the fracturing device 200. In this way, the fracturing fluid with proppant conveyed to the fracturing device 200 can be controlled, so that the inlet of the fracturing device 200 can be closed by closing the second valve body 1820 when no fracturing operation is performed, so as to prevent the fracturing fluid with proppant in the proppant blending device 100 from flowing into the fracturing device 200. Exemplarily, the first valve body 1810 may be a starting valve, such as a pneumatic valve or an electric valve. Of course, it may also be a manual valve.

[90] The fracturing system may further include a third valve body 830, and the third valve body 830 is connected to the low-pressure manifold 1920 and provided adjacent to the outlet of the hydration device 300. In this way, the third valve body 830 can be closed to block the fracturing fluid in the hydration device 300 when no fracturing operation is performed, so as to prevent the fracturing fluid from flowing into the hydration device 300.

[91] In an embodiment of the present application, the upstream devices are respectively the hydration device 300 and the proppant conveying device 400, the hydration device 300 feeds the fracturing fluid to the proppant blending device 100, the proppant conveying device 400 feeds the fracturing proppant to the proppant blending device 100, the proppant blending device 100 mixes the fracturing fluid and the fracturing proppant according to a certain proppant ratio to form the fracturing fluid with proppant, the fracturing fluid with proppant is conveyed to the fracturing device 200 through the low-pressure manifold 1920, and the fracturing device 200 conveys the fracturing fluid with proppant to the wellhead through high-pressure manifold 1910, so that the fracturing fluid with proppant can reach the wellbore to achieve the fracturing operation.

[92] In an embodiment of the present application, detailed description will be made by taking a four-level safety protection process as an example. Specifically, four levels of pressure protection values are set, namely, a first-level pressure protection value (i.e., a first pressure protection value), a second-level pressure protection value (i.e., a second pressure protection value), a third-level pressure protection value (i.e., a third pressure protection value), and a fourth-level pressure protection value (i.e., a fourth pressure protection value).

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

[94] Correspondingly, a numerical value for flowrate decreasing under first-level pressure protection may be 0.5 m3 / min, a numerical value for flowrate decreasing under second-level pressure protection may be 1.0 m3 / min, a numerical value for flowrate decreasing under third-level pressure protection may be 2.0 m3 / min, and a numerical value for flowrate decreasing under fourth-level pressure protection may be 4.0 m3 / min.

[95] A percentage for flowrate decreasing under the first-level pressure protection may be 2%, a percentage for flowrate decreasing under the second-level pressure protection may be 5%, a percentage for flowrate decreasing under the third-level pressure protection may be 10%, and a percentage for flowrate decreasing under the fourth-level pressure protection may be 20%.

[96] A proppant ratio for proppant amount decreasing under the first-level pressure protection may be 5%, a proppant ratio for proppant amount decreasing under the second-level pressure protection may be 10%, a proppant ratio for proppant amount decreasing under the third-level pressure protection may be 15%, and a proppant ratio for proppant amount decreasing under the fourth-level pressure protection may be 20%.

[97] A concentration value for proppant amount decreasing under first-level pressure protection may be 60 kg / m3, a concentration value for proppant amount decreasing under second-level pressure protection may be 120 kg / m3, a concentration value for proppant amount decreasing under third-level pressure protection may be 180 kg / m3, and a concentration value for proppant amount decreasing under fourth-level pressure protection may be 240 kg / m3.

[98] Exemplarily, during the actual operation, it is set that flowrate decreasing is the numerical value for the flowrate decreasing and the proppant amount decreasing is the proppant ratio for proppant amount decreasing; and the actual pressure value is 80 MPa, and in this case, the flowrate is 10 m3 / min and the proppant ratio is 40%.

[99] When the actual pressure value reaches the first-level pressure protection value of 84 MPa, but does not reach the second-level pressure protection value of 86 MPa, a first-level pressure protection function is triggered, including triggering the flowrate decreasing function of the fracturing device 200, which is executed by decreasing the total flowrate by 0.5 m3 / min, so that the total flowrate is decreased to 9.5 m3 / min, and triggering the proppant amount decreasing function of the proppant blending device 100, which is executed by decreasing the proppant ratio by 2%, so that the proppant ratio is decreased to 38%.

[100] An embodiment of the present application achieves the automatic control and linkage control between the proppant blending device 100 and the upstream and downstream devices, and changes independent operation states of the proppant blending device 100, the upstream devices (i.e., the hydration device 300 and the proppant conveying device 400), and the downstream device (i.e., the fracturing device 200), so that the key operation parameters of the fracturing device 200 can be transmitted to the proppant blending device 100, the proppant blending device 100 can predict the operation conditions in advance, act in advance before the operation parameters of the proppant blending device 100 change and transmit them to the upstream devices in advance after the operation parameters of the proppant blending device 100 change, and the upstream devices can act in advance. Therefore, through intelligent linkage control, the fracturing operation process can be made more stable and smoother, laying a technical foundation for the development trend of automation, remote control, and unmanned operation.

[101] A safety control method for a fracturing operation provided in this embodiment of the present application is applied to the fracturing operation. Specifically, it may be applied to safety control of valves in the fracturing operation. Specifically, when the fracturing device is used to perform the operation (for example, during the construction process of the fracturing operation), valves are locked; and when the valves are operated (for example, when the opening or closing states of the valves are confirmed), the fracturing device is locked to ensure the safety of the fracturing construction operation.

[102] The safety control method for a fracturing operation provided in this embodiment of the present application may involve the fracturing device. The fracturing device may be used on a construction site of the fracturing operation. The essence of the fracturing operation is to rapidly inject a fluid with a certain viscosity into a formation. When the injection speed of a pump is greater than the absorption speed of the formation, the formation will fracture or an original small crack will be opened to form a larger crack. As the fluid is continuously injected, the formed crack will extend inwards. In order to prevent the crack from being closed again after the pump is stopped, a proppant is required to be added to the injected fluid to fill the opened crack and support the crack, thus forming a certain flow channel in the original rock layer to achieve the industrial mining operation.

[103] The safety control method for a fracturing operation provided in an embodiment of the present application may be executed by a target device. A fracturing device control system and a valve control system may be configured in the target device. The fracturing device control system and the valve control system may be software control systems. Specifically, the fracturing device control system may be configured for controlling the fracturing device, and the valve control system may be configured for controlling the valves on an operation site. The target device may be one or more electronic devices. That is to say, the safety control method for a fracturing operation provided in this embodiment of the present application may be executed by one electronic device. The electronic device may be, for example, an instrument sled, a terminal device such as a desktop computer, a laptop, a mobile phone, and a tablet, or a server such as an independent physical server, a server cluster composed of multiple servers, or a cloud server capable of performing cloud computing. When the safety control method for a fracturing operation provided in this embodiment of the present application is executed by multiple electronic devices, these multiple electronic devices may form a service cluster and cooperate with each other to complete each step.

[104] The safety control method for a fracturing operation provided in an embodiment of the present application will be described below in detail through specific embodiments and application scenarios with reference to the drawings.

[105] Please refer to FIG. 5. FIG. 5 is a flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG. 5, the method includes the following steps.

[106] In step S110, the target device acquires target information related to a fracturing device.

[107] In this embodiment of the present application, the target device may include an instrument sled, and the fracturing device may be a device used during the fracturing operation, such as a wellhead sealing device or a ball injector. The target information may be instruction information related to the fracturing device during the fracturing operation, or forced control instruction information for the fracturing device or the like. Where, for the instruction information related to the fracturing device during the fracturing operation, for example, if the fracturing device is configured for this fracturing operation, the target device will acquire the instruction information related to the fracturing device to meet the use requirement of the fracturing device during the fracturing operation. The forced control instruction information for the fracturing device may be manual forced control instruction information for the fracturing device. For example, in case the fracturing device is faulted, it may be considered that the fracturing device is forcibly disabled.

[108] In an embodiment of the present application, in step S110, the target information includes a flowrate or pressure of the fracturing device, and in step S120, the target device locking a target valve when the target information satisfies a target condition includes the following step: the target device locks the target valve when the flowrate of the fracturing device is greater than 0 or the pressure of the fracturing device is greater than 0.

[109] In step S120, the target device locks a target valve when the target information satisfies a target condition, so that an opening or closing operation is unable to be performed on the target valve.

[110] In this embodiment of the present application, the target condition may include at least one of the following conditions: the fracturing device is operating, the fracturing device is about to start operating, and the fracturing device has been deactivated; and the target valve is a valve related to the fracturing device. When the target condition is satisfied, the target valve may be locked to avoid a fracturing operation failure or a safety accident caused by the opening or closing state of the target valve.

[111] In an embodiment of the present application, the valves on the operation site may include an operable valve and an inoperable valve. Where, the inoperable valve is a valve whose opening or closing in an operation process causes an operation failure or a safety accident, the operable valve is a valve that does not affect an operation or valve that is configured for emergency response, and the target valve may include the inoperable valve.

[112] In this embodiment of the present application, since the operable valve may include a valve that do not affect the operation, the opening or closing of such valves will not affect the progress of the fracturing operation or cause a safety accident. Therefore, these valves do not need to be locked and may be opened or closed normally in the operation process. Meanwhile, the operable valve may further include a valve for emergency use. The valves for emergency use may be valves that can be configured for emergency response in case a safety hazard occurs during the fracturing operation. Such valves may affect the operation.

[113] In this embodiment of the present application, the target device may lock an inoperable valve when the target information satisfies the target condition, so that an opening or closing operation is unable to be performed on the inoperable valve. In this case, it can prevent the inoperable valve, which may lead to operation failure or safety accidents, from having abnormal opening or closing states caused by misoperation or other acts during operation, so as to avoid resulting safety incidents..

[114] In an embodiment of the present application, the number of the target valves is M, where M is an integer greater than 1. In step S120, the target device locking the target valves includes the following step: the target device sequentially locks each target valve according to a preset operation sequence of the M target valves.

[115] In this embodiment of the present application, in a process of performing opening or closing operations on the target valves, the target device may perform a one-touch sequential valve switching process according to the operation sequence. That is, the target device performs opening or closing operations on the target valves one by one according to the operation sequence. In addition, only after the opening or closing operation of the previous target valve is completed, can the opening or closing operation of the next target valve be performed.

[116] In this embodiment of the present application, the number of the 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 the preset operation sequence of the M target valves. In this way, since the target valves are sequentially locked according to the preset operation sequence of the target valves, it can avoid repeated state-checking on a target valve or missed state-checking on a certain target valve in the locking process, thus improving the efficiency and reliability of state-checking of the target valves.

[117] In this embodiment of the present application, the target device acquires target information related to the fracturing device; and the target device locks a target valve when the target information satisfies a target condition, so that an opening or closing operation is unable to be performed on the target valve. In this way, when it is detected that the target information related to the fracturing device satisfies the target condition, the target device may lock the target valve on the operation site, so that the opening or closing state of the target valve cannot be switched, thus preventing the opening or closing state of the valve from being incorrect due to the misoperation on the valve, and solving the technical problem of high safety risk in the fracturing operation.

[118] Please refer to FIG. 6. FIG. 6 is a flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG. 6, the method includes the following steps.

[119] In step S210, the target device acquires a fracturing operation instruction for controlling the fracturing device.

[120] In this embodiment of the present application, the fracturing operation instruction is configured for instructing the fracturing device to perform the fracturing operation. Specifically, the fracturing operation may be divided into seven major process operations, i.e., circulation, pressure testing, injection testing, fracturing, proppant, proppant flowrate, and backwashing or string moving. The fracturing operation instruction may be an instruction for instructing the fracturing device to perform at least one of the seven major process operations. For example, the fracturing operation instruction may be an instruction for instructing the fracturing device to perform a circulation operation, or the fracturing operation instruction may be an instruction for instructing the fracturing device to perform a pressure testing operation.

[121] In step S220, the target device locks a target valve in a process that the target device controls a fracturing operation of the fracturing device in response to the fracturing operation instruction, so that an opening or closing operation is unable to be performed on the target valve.

[122] In this embodiment of the present application, when the fracturing operation instruction is received, it may be determined that the fracturing device is about to perform or is performing a fracturing operation related to the fracturing operation instruction. At this time, the target device may lock the target valve, so that an opening or closing operation is unable to be performed on the target valve.

[123] In an embodiment of the present application, in order to monitor whether the fracturing device is performing the fracturing operation, the flowrate or pressure of the fracturing device may be monitored in real time. The flowrate or pressure of the fracturing device will be kept at 0 when the fracturing device is not performing the fracturing operation. Therefore, it may be determined that the fracturing device is performing the fracturing operation when the flowrate of the fracturing device is greater than 0 or the pressure of the fracturing device is greater than 0. The target device may lock the target valve, so that an opening or closing operation is unable to be performed on the target valve. In this way, the operation state of the fracturing device can be determined by monitoring the flowrate and pressure of the fracturing device, thus ensuring that the target valve is locked once the fracturing device is in operation.

[124] In an embodiment of the present application, the target valve may include an inoperable valve, and the inoperable valve is a valve whose opening or closing in the operation process will cause an operation failure or a safety accident.

[125] In this embodiment of the present application, the target device acquires a fracturing operation instruction for controlling a fracturing device; and the target device locks the target valve in a process that the target device controls a fracturing operation of the fracturing device in response to the fracturing operation instruction. In this way, the target valve may be locked in a process that the fracturing device performs the fracturing operation, thus avoiding the safety accident caused by the misoperation of the target valve during the fracturing operation.

[126] Please refer to FIG. 7. FIG. 7 is a flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG. 7, the method includes the following steps.

[127] In step S310, the target device performs a control operation on the target valve.

[128] In this embodiment of the present application, the control operation includes an opening or closing operation on the target valve. Specifically, the control operation may be an operation of confirming or switching the opening or closing state of the target valve through the target device before the fracturing operation is performed.

[129] Optionally, in an embodiment of the present application, the valves on the site may include an operable valve and an inoperable valve; and the inoperable valve is a valve whose opening or closing in an operation process causes an operation failure or a safety accident, and the operable valve is a valve that does not affect an operation or valves that is configured for emergency response. The target valve includes the inoperable valve, and the inoperable valve is the valve whose opening or closing in the operation process causes an operation failure or a safety accident.

[130] In step S320, the target device locks the fracturing device in a process of performing the control operation on the target valve, so that the fracturing device is unable to perform the fracturing operation.

[131] In this embodiment of the present application, in the process of confirming or switching the opening or closing state of the target valve, the target device may lock the fracturing device, so that the fracturing device is unable to perform a flowrate increasing operation, thus achieving the locking of the fracturing device through the target valve.

[132] In step S330, the target device unlocks the fracturing device after the control operation on the target valve is completed.

[133] In this embodiment of the present application, the target valves may include multiple target valves, and the target device may unlock the fracturing device after confirming the opening or closing states of all target valves. After the fracturing device is unlocked, the fracturing device may perform normal fracturing operations.

[134] In step S340, the target device acquires target information related to the fracturing device.

[135] In step S350, the target device locks the target valve when the target information satisfies a target condition, so that an opening or closing operation is unable to be performed on the target valve.

[136] In this embodiment of the present application, in a process that the fracturing device is about to operate or is operating, the target device may lock the target valve. That is, the opening or closing state of the target valve cannot be switched.

[137] In this embodiment of the present application, the target device performs a control operation on the target valve; the target device locks the fracturing device in a process of performing the control operation on the target valve, so that the fracturing device is unable to perform the fracturing operation; and the target device unlocks the fracturing device after the control operation on the target valve is completed. In this way, the fracturing device is locked when the control operation is performed on the target valve; and the target valve is locked when the fracturing device operates. By monitoring the target valve and the fracturing device, the safety interlock between the fracturing device and the target valve is achieved.

[138] Please refer to FIG. 8. FIG. 8 is a flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG. 8, the method includes the following steps.

[139] In step S410, the target device acquires target information related to a fracturing device.

[140] In step S420, the target device transmits a valve locking instruction to a valve feedback apparatus when the target information satisfies a target condition. The valve locking instruction is configured for instructing to lock the target valve.

[141] In this embodiment of the present application, in order to confirm or switch the opening or closing state of the target valve before performing the fracturing operation, the target device may transmit a valve locking instruction to a valve feedback apparatus corresponding to the target valve, and the valve locking instruction is configured for instructing to lock the target valve.

[142] Optionally, in an embodiment of the present application, the valves on the operation site may include an operable valve and an inoperable valve; and the inoperable valve is the valve whose opening or closing in an operation process causes an operation failure or a safety accident, the operable valve is the valve that does not affect an operation or the valve that is configured for emergency response, and the target valve may include the inoperable valve.

[143] In this embodiment of the present application, the target valves may include multiple target valves. When a valve locking instruction is transmitted to each target valve, a sequence may be preset for the multiple target valves, and then the valve locking instruction may be transmitted to the valve feedback apparatus corresponding to each target valve according to this sequence.

[144] In an embodiment of the present application, the valve feedback apparatus is wirelessly connected to the target device, the valve feedback apparatus is configured for controlling the opening or closing of the target valve, and each valve feedback apparatus has a unique IP address; and the target valve includes a first valve provided at a wellhead and / or a second valve provided at a manifold.

[145] In this embodiment of the present application, the valve feedback apparatus may communicate with the target device to confirm and switch the opening or closing state of the target valve. It should be noted that the position of the target valve is not limited, and the target valve may include valves provided at various locations on the well site, for example, a first valve provided at the wellhead, a second valve provided at the manifold, and a valve provided between the manifold and the wellhead. Meanwhile, each valve feedback apparatus may correspond to one target valve on the operation site, the valve feedback apparatus may have a unique IP address, and the IP address may be an IP address of the target valve corresponding to the valve feedback apparatus.

[146] In this embodiment of the present application, the opening or closing state of the target valve can be further confirmed through communication between the valve feedback apparatus and the target device. Meanwhile, separate control of each target valve can be achieved by setting a unique IP address for the valve feedback apparatus.

[147] In step S430, the target device receives locking completion information transmitted by the valve feedback apparatus after the target valve is locked.

[148] In this embodiment of the present application, after the valve locking instruction is transmitted to the valve feedback apparatus of the target valve, the valve feedback apparatus may determine whether the opening or closing state of the target valve is consistent with an expected opening or closing state. If the opening or closing state of the target valve is consistent with the expected opening or closing state, the valve feedback apparatus may confirm the opening or closing state of the target valve and lock the target valve. Meanwhile, the valve feedback apparatus may transmit locking completion information to the target device. If the opening or closing state of the target valve is not consistent with the expected opening or closing state, the opening or closing state of the target valve may be switched to the expected opening or closing state, and the opening or closing state of the target valve is locked after switching. Meanwhile, the valve feedback apparatus may transmit locking completion information to the target device.

[149] In this embodiment of the present application, if there are multiple target valves, the locking of the opening or closing states of the multiple target valves may be completed according to the sequence. Specifically, after the opening or closing state of the previous target valve is confirmed and the locking completion information transmitted by the valve feedback apparatus is received, then the opening or closing state of the next target valve may be confirmed.

[150] In this embodiment of the present application, the target device transmits a valve locking instruction to a valve feedback apparatus, and the valve locking instruction is configured for instructing to lock the target valve; and the target device receives locking completion information transmitted by the valve feedback apparatus after the target valve is locked. In this way, after the target valve is locked and the locking completion information transmitted by the valve feedback apparatus is received, then the locking of the target valve can be completed. By setting the locking completion information, the locking of the target valve can be confirmed again, thus improving the accuracy of the opening or closing state of the target valve and further reducing the safety risk.

[151] Please refer to FIG. 9. FIG. 9 is a flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG. 9, the method includes the following steps.

[152] In stepS510, the target device acquires a well site layout or configuration.

[153] In this embodiment of the present application, the well site layout or configuration may be a well site layout pre-designed for an operation site, and a well site layout design may be obtained through restoration according to the operation site. The well site layout design includes the splicing of components corresponding to devices on the operation site. Specifically, location information of the components in the well site layout and a connection relationship between the components in the well site layout may be determined by referring to location information of the devices on the operation site and a connection relationship between the devices on the operation site. The components in the well site layout include a fracturing device, a target valve, and a manifold, which respectively correspond to a fracturing device, a target valve, and a manifold on the operation site.

[154] In an embodiment of the present application, the valve on the operation site may be combined with the fracturing device or the manifold, and the valve may be located on the manifold, between the fracturing device and the manifold, or on the well site. Meanwhile, the target device may be connected to the fracturing device through a network cable, the fracturing device may be connected to the manifold, and the manifold may be connected to the well site.

[155] In an embodiment of the present application, in order to ensure the accuracy during restoration of the operation site, the devices on the operation site (including the fracturing device, the target valve, and the manifold) may be respectively provided with a feedback apparatus, and the feedback apparatus may acquire IP addresses of the devices on the operation site. In a process of designing the well site layout, the components in the well site layout may be bound to the IP addresses of the devices on the site corresponding to the components. Meanwhile, the control of and communication between the components in the well site layout and corresponding feedback apparatuses may be achieved.

[156] In an embodiment of the present application, parameters may be configured for the components in the well site layout, and the parameters are configured for indicating the opening or closing states of the components. Specifically, the parameters for valve components may be configured for indicating the opening or closing states of the valve components. The parameters for the fracturing device and the manifold may be configured for indicating the display states of the fracturing device and the manifold, and the display states may be determined according to the opening or closing states of the valve components and configured for displaying whether there is a fluid flowing.

[157] In step S520, the target device sets types and an operation sequence of the target valves within the well site layout. The types include an operable valve and an inoperable valve. The number of the target valves is M, where M is an integer greater than 1.

[158] In this embodiment of the present application, the inoperable valve is the valve whose opening or closing in an operation process causes an operation failure or a safety accident, and the operable valve is the valve that does not affect an operation or the valve that is configured for emergency response. The operation sequence may be preset by the target device according to the fracturing operation process. Specifically, the fracturing operation may be divided into seven major process operations, i.e., circulation, pressure testing, injection testing, fracturing, proppant, proppant flowrate, and backwashing or string moving. A corresponding operation sequence may be set for each of the seven major process operations.

[159] In this embodiment of the present application, the operation sequence may be preset based on the well site layout or configuration, and the operation sequence for each of the seven major processes may be determined. Specifically, taking the operation sequence for a process as an example, after the well site layout or configuration is acquired, a process may be newly created and a corresponding process name may be configured for the process. The opening or closing state of the target valve in the process may be determined according to the opening or closing state of the target valve during the actual fracturing operation. The operation sequence of the target valves may be determined according to the location information of the target valves. For example, it may be determined one by one from north to south. Alternatively, it may be determined according to the distance from the well site. The target valve closest to the well site is determined as the first one, the target valve farthest from the well site is determined as the last one, and so on until the operation sequence of all target valves is determined.

[160] In an embodiment of the present application, the target valve includes an inoperable valve, and the inoperable valve is the valve whose opening or closing in the operation process will cause an operation failure or a safety accident.

[161] In step S530, the target device acquires target information related to the fracturing device.

[162] In this embodiment of the present application, the target information may be configured for indicating that the fracturing device is about to perform or is performing a fracturing operation for one of the seven major processes. For example, the target information may be configured for indicating that the fracturing device is performing a circulation operation.

[163] In step S540, the target device sequentially locks each target valve according to the preset operation sequence of M target valves when the target information satisfies a target condition, so that an opening or closing operation is unable to be performed on the target valve.

[164] In this embodiment of the present application, in a process of performing opening or closing operations on the target valves, the opening or closing operation may be performed on the target valves one by one according to the components in the layout design. Alternatively, the target device may perform a one-key switching process according to the operation sequence. That is, the target device performs opening or closing operations on the target valves one by one according to the operation sequence. In addition, only after the opening or closing operation of the previous target valve is completed, can the opening or closing operation of the next target valve be performed.

[165] In this embodiment of the present application, the locking process may be confirmed through a valve feedback apparatus corresponding to the target valve. That is, only after the opening or closing operation of one target valve is completed and the locking completion information from the valve feedback apparatus corresponding to the target valve is received, then can the opening or closing operation of a next target valve be performed. Specifically, before a certain target valve is locked according to the operation sequence, the valve feedback apparatus of the target valve may confirm the opening or closing state of the target valve based on the preset opening or closing state of the target valve in the process. If the opening or closing state of the target valve is consistent with the preset opening or closing state of the target valve, the valve feedback apparatus of the target valve may transmit locking completion information to the target device. If the opening or closing state of the target valve is inconsistent with the preset opening or closing state of the target valve, the valve feedback apparatus of the target valve will switch the opening or closing state of the target valve; after state switching, the opening or closing state of the target valve may be confirmed again; and if the opening or closing state of the target valve is consistent with the preset opening or closing state of the target valve, the valve feedback apparatus of the target valve may transmit locking completion information to the target device.

[166] In this embodiment of the present application, according to the well site layout obtained by restoring the well site, the target valves on the well site can be controlled and the valves on the well site can be locked in an orderly manner. Moreover, the valves are divided into two types, including an operable valve and an inoperable valve, the inoperable valve can be locked, and the operable valve can be configured for emergency response in case a safety hazard occurs.

[167] Please refer to FIG. 10 and FIG. 11. FIG. 10 is a schematic diagram of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG. 10, the target valve may be locked in the process that the fracturing device performs the fracturing operation, and the fracturing device may be locked in the process of switching the opening or closing state of the target valve. There may be multiple fracturing devices on the well site (such as a fracturing device 1, a fracturing device 2,..., and a fracturing device n in FIG. 10), the fracturing devices related to this fracturing operation may be determined, and safety control may be performed thereon. In addition, in the process of locking the target valve, the target valve may be locked through three aspects (layout design, process design, and process control). Specifically, the layout design is to obtain a well site layout through restoration according to the devices on the operation site, and acquire information about the devices on the operation site through the well site layout; the process design is to design the opening or closing states and the operation sequence of the target valves in a certain process of the fracturing operation; and the process control is to confirm the opening or closing states of the target valves on the site one by one according to the opening or closing states and the operation sequence of the target valves set in the process design.

[168] FIG. 11 is a complete flowchart of a safety control method for a fracturing operation provided in an embodiment of the present application. As shown in FIG. 11, the safety control method for a fracturing operation provided in an embodiment of the present application includes the following steps.

[169] In step S710, the target device acquires a well site layout or configuration.

[170] In this embodiment of the present application, the well site layout or configuration may be a well site layout pre-designed for an operation site, and a well site layout design may be obtained through restoration according to the operation site. The well site layout design includes the splicing of components corresponding to devices on the operation site.

[171] In step S720, the target device sets types and an operation sequence of the target valves within the well site layout. The types include an operable valve and an inoperable valve.

[172] In this embodiment of the present application, the inoperable valve is the valve whose opening or closing in an operation process causes an operation failure or a safety accident, and the operable valve is the valve that does not affect an operation or valves that is configured for emergency response. The operation sequence may be preset by the target device according to the fracturing operation process. Specifically, the fracturing operation may be divided into seven major process operations, i.e., circulation, pressure testing, injection testing, fracturing, proppant, proppant flowrate, and backwashing or string moving. A corresponding operation sequence may be set for each of the seven major process operations.

[173] In step S730, the target device performs a control operation on the target valve.

[174] In step S740, the target device locks the fracturing device in a process of performing the control operation on the target valve, so that the fracturing device is unable to perform the fracturing operation.

[175] In step S750, the target device unlocks the fracturing device after the control operation on the target valve is completed.

[176] In step S760, the target device acquires target information related to the fracturing device. The target information includes a flowrate or pressure of the fracturing device.

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

[178] In step S770, the target device transmits a locking instruction to the valve feedback apparatus when the flowrate of the fracturing device is greater than 0 or the pressure of the fracturing device is greater than 0. The valve locking instruction is configured for instructing to lock the target valve.

[179] In this embodiment of the present application, the valve feedback apparatus is wirelessly connected to the target device, the valve feedback apparatus is configured for controlling the opening and closing of the target valve, and each valve feedback apparatus has a unique IP address; and the target valve includes a first valve provided at a wellhead and / or a second valve provide at a manifold. The target device may sequentially lock each target valve according to a preset operation sequence of the M target valves. Specifically, the target device may transmit a valve locking instruction to a valve feedback apparatus corresponding to the target valve, and the valve locking instruction is configured for instructing to lock the target valve.

[180] In step S780, the target device receives locking completion information transmitted by the valve feedback apparatus after the target valve is locked.

[181] In this embodiment of the present application, after the opening or closing state of the previous target valve is confirmed, the previous target valve is locked and the locking completion information transmitted by the valve feedback apparatus is received, then the opening or closing state of the next target valve may be confirmed and the next target valve may be locked.

[182] In this embodiment of the present application, the target device acquires target information related to the fracturing device; and the target device locks a target valve when the target information satisfies a target condition, so that an opening or closing operation is unable to be performed on the target valve. In this way, when it is detected that the target information related to the fracturing device satisfies the target condition, the target device may lock the target valve on the operation site, so that the opening or closing state of the target valve cannot be switched, thus preventing the opening or closing state of the valve from being incorrect due to the misoperation on the valve, and solving the technical problem of high safety risk in the fracturing operation.

[183] It should be understood that a cross reference may be made for the explanation of the same or corresponding steps in FIG. 5 to FIG. 11. For example, the explanations of step S110 and step S120 in FIG. 5 may be applied to step S510 and step S520 in FIG. 9.

[184] In addition, it should be understood that the safety control method for a fracturing operation provided in this embodiment of the present application may have the following beneficial effects: firstly, the method provided in the present application can achieve the safety interlocking between the fracturing device and the target valve through the process control method, thus ensuring that the fracturing operation can only be performed after the target valves are in the correct opening or closing states in the operation process on the site; secondly, the method provided in the present application can be used in the fracturing operation process, and the opening or closing state of a target valve that has already been locked cannot be switched, thus improving the safety of the fracturing construction operation on the well site; and thirdly, a method provided in the present application can automatically control and monitor the opening or closing state of the valve, thus avoiding the safety risk arising from missed state-checking by human inspection.

[185] FIG. 12 is a structural block diagram of a safety control apparatus for a fracturing operation provided in an embodiment of the present application. Referring to FIG. 12, the safety control apparatus 800 for a fracturing operation provided this embodiment of the present application includes:an acquisition module 810 configured to acquire target information related to a fracturing device; anda locking module 820 configured to lock a target valve when the target information satisfies a target condition, so that an opening or closing operation is unable to be performed on the target valve.

[186] In this embodiment of the present application, the acquisition module is used to acquire target information related to a fracturing device; and the locking module is used to lock a target valve when the target information satisfies a target condition, so that an opening or closing operation is unable to be performed on the target valve. In this way, when it is detected that the target information related to the fracturing device satisfies the target condition, the target valve on the operation site may be locked, so that the opening or closing state of the target valve cannot be switched, thus preventing the opening or closing state of the valve from being incorrect due to the misoperation on the valve, and solving the technical problem of high safety risk in the fracturing operation.

[187] In an embodiment of the present application, in a process of acquiring the target information related to the fracturing device, the acquisition module 810 is specifically configured to: acquire the fracturing operation instruction for controlling the fracturing device; and in a process of locking the target valve when the target information satisfies the target condition, the locking module 820 is specifically configured to: lock the target valve in a process of controlling a fracturing operation of the fracturing device in response to the fracturing operation instruction.

[188] In an embodiment of the present application, the target information includes: a flowrate or pressure of the fracturing device. In a process of locking the target valve when the target information satisfies the target condition, the locking module 820 is specifically configured to: lock the target valve when the flowrate of the fracturing device is greater than 0 or the pressure of the fracturing device is greater than 0.

[189] In an embodiment of the present application, before the target information related to the fracturing device is acquired, the locking module 820 is further configured to: perform a control operation on the target valve; lock the fracturing device in a process of performing the control operation on the target valve, so that the fracturing device is unable to perform the fracturing operation; and unlock the fracturing device after the control operation on the target valve is completed.

[190] In an embodiment of the present application, in a process of locking the target valve, the locking module 820 is specifically configured to: transmit a valve locking instruction to a valve feedback apparatus, where the valve locking instruction is configured for instructing to lock the target valve; and receive locking completion information transmitted by the valve feedback apparatus after the target valve is locked.

[191] In an embodiment of the present application, the valve feedback apparatus is wirelessly connected to the safety control apparatus for a fracturing operation, the valve feedback apparatus is configured for controlling the opening and closing of the target valve, and each valve feedback apparatus has a unique IP address; and the target valve includes a first valve arranged at a wellhead and / or a second valve arranged at a manifold.

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

[193] In an embodiment of the present application, before acquiring the target information related to the fracturing device, the acquisition module 810 is further configured to: acquire a well site layout or configuration; and set types and an operation sequence of the target valves within the well site layout, where the types include an operable valve and an inoperable valve; and the inoperable valve is the valve whose opening or closing in an operation process causes an operation failure or a safety accident, and the operable valve includes the valve that does not affect an operation or valves that is configured for emergency response.

[194] As shown in FIG. 13, an embodiment of the present application further provides a target device 900. The target device may be various computers or the like. The target device 900 includes: a memory 920 and a processor 910, where the memory 920 stores programs or instructions, and when the programs or the instructions are executed by the processor 910, the processor implements steps of any method described above. For example, when the programs are executed by the processor 910, the processor implements the following processes: the target device acquires target information related to a fracturing device; and the target device locks a target valve when the target information satisfies a target condition, so that an opening or closing operation is unable to be performed on the target valve. In this way, when it is detected that the target information related to the fracturing device satisfies the target condition, the target device may lock the target valve on the operation site, so that the opening or closing state of the target valve cannot be switched, thus preventing the opening or closing state of the valve from being incorrect due to the misoperation on the valve, and solving the technical problem of high safety risk in the fracturing operation.

[195] As shown in FIG. 10 and FIG. 14, an embodiment of the present application further provides a fracturing operation control system. The fracturing operation control system includes a fracturing device 1010, a manifold 1020, a target valve 1030, and the above target device 1040. The target device 1040 is connected to the fracturing device 1010. The fracturing device 1010 is connected to the manifold 1020. As shown in FIG. 10 and FIG. 14, the target valve 1030 may be located on the manifold 1020. It is to be noted that the target valve being located on the manifold in FIG. 10 and FIG. 14 is only exemplary, and 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.

[196] An embodiment of the present application further provides a readable storage medium. The readable storage medium has programs or instructions stored therein. When the programs or instructions are executed by a processor, the processor implements steps of the safety control method for a fracturing operation in each embodiment and can achieve the same technical effects, which will not be repeated here in order to avoid repetition.

[197] The processor is a processor described in the electronic device 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.

[198] An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run programs or instructions to implement various processes of the above method embodiments and can achieve the same technical effects, which will not be repeated here in order to avoid repetition.

[199] An embodiment of the present application further provides a computer program product. The program product is stored in a storage medium. When the program product is executed by at least one processor, the processor implements various processes of the above method embodiments and can achieve the same technical effects, which will not be repeated here in order to avoid repetition.

[200] Technical implementations of embodiments of the present application will be clearly and completely described below with reference to the drawings of embodiments of the present application. Clearly, the described embodiments are merely some rather than all embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on embodiments described in the present application without making creative efforts shall fall within the protection scope of the present application.

[201] Terms such as "first" and "second" in the description and claims of the present application are configured for distinguishing similar objects, instead of describing a specific order or sequence. It is to be understood that data used in this way are exchangeable in a proper case, so that the embodiments of the present application can be implemented in an order different from the order shown or described herein; and the objects distinguished by "first", "second" and the like are usually of the same class and do not limit the number of the objects, for example, the number of first objects may be one or more. In addition, "and / or" in the description and claims represents at least one of the connected objects. Character " / " generally represents an "or" relationship between the associated objects.

[202] As shown in FIG. 15, an embodiment of the present application discloses a fracturing fluid supplying device (hereinafter referred to as "fluid supplying device" or "device"). The fluid supplying device can feed a fracturing fluid, that is, the fluid supplying device disclosed in this embodiment of the present application can use corresponding raw materials to prepare and form the fracturing fluid. The raw materials for forming the fracturing fluid such as a base fluid can be conveyed from the outside to the fluid supplying device disclosed in the present application. Of course, the fluid supplying device can also use corresponding raw materials to prepare and form upstream intermediate products of the fracturing fluid, such as base fluids including slickwater and a guar gum fluid. As shown in FIG. 15, the fracturing fluid supplying device disclosed in this embodiment of the present application includes a fluid replenishment apparatus, a base fluid container, a proppant mixing apparatus 0400, and a control apparatus 0500. Of course, the fluid supplying device may further include pipelines for connecting corresponding two components, and cables or oil pipelines for providing power to each component, which will not be described in detail herein.

[203] The fluid replenishment apparatus is in fluid communication with an inlet of the base fluid container. The replenishment of the base fluid in the base fluid container may be controlled by using the fluid replenishment apparatus. In detail, as described above, the raw materials for forming the fracturing fluid such as the base fluid in the fluid supplying device disclosed in this embodiment of the present application may be fed from the outside. For example, in a working process of the fracturing fluid supplying device disclosed in this embodiment of the present application, a device capable of containing the base fluid or processing the base fluid such as a base fluid device may form a communication relationship with the fluid supplying device disclosed in this embodiment of the present application. When it is necessary to replenish the base fluid into the base fluid container in the fluid supplying device disclosed in this embodiment of the present application, the base fluid in the above base fluid device may be conveyed into the base fluid container in the fluid supplying device disclosed in the present application.

[204] Based on the above technical features, in the present application, the fluid replenishment apparatus may include a control valve, an on-off state between the base fluid device and the base fluid container is controlled by using the control valve, the base fluid device can replenish the base fluid into the base fluid container when the control valve is in an open state, and correspondingly, the base fluid device cannot continue to replenish the base fluid into the base fluid container when the control valve is in a closed state, thus correspondingly controlling the opening and closing of the control valve according to the actual needs.

[205] Correspondingly, in this embodiment of the present application, the control valve of the fluid replenishment apparatus may be connected to the control apparatus 0500, so that the control valve included in the fluid replenishment apparatus can be opened by using the control apparatus 0500 to replenish the base fluid into the base fluid container. Of course, in the above technical features, the base fluid in the base fluid device can automatically or controllably flow towards the location of the control valve, and pass through the control valve when the control valve is in the open state.

[206] In order to further improve the autonomy and independence of the fluid supplying device disclosed in this embodiment of the present application, in another embodiment of the present application, the fluid replenishment apparatus includes a fluid storage container 0100 and a hydration apparatus 0200, so that the fluid supplying device itself has the ability to prepare and form the base fluid. In addition, in order to facilitate the description below, in the following embodiments in the present application, the fluid supplying device disclosed in the present application will be described by taking the implementation of the fluid replenishment apparatus including a fluid storage container 0100 and a hydration apparatus 0200 as an example.

[207] The fluid storage container 0100 is configured for storing water. More specifically, it may be configured for storing liquid water with relatively high cleanliness, such as deionized water or purified water. The water in the fluid storage container 0100 is an important raw material in a hydration process. The fluid storage container 0100 may specifically include components such as a storage tank. Of course, the fluid storage container 0100 may also be a barrel-shaped structure, which is not limited herein.

[208] Optionally, the fluid storage container 0100, the hydration apparatus 0200, the base fluid container, the proppant mixing apparatus 0400 and the like may be all installed on a transport device such as a frame or a sled, so that the entire fracturing fluid supplying device can be moved together, so as to switch between production sites and improve the convenience in use. Of course, in other embodiments of the present application, the fluid storage container 0100, the hydration apparatus 0200, the base fluid container, the proppant mixing apparatus 0400 and the like may also be installed separately or jointly on a transport device such as a frame or a sled. Before transferring the production site, the pipelines between the apparatuses on different transport devices may be removed, and each transport device may be independently transferred. After arriving at a next production site, the pipelines and cables between the above apparatuses may be connected together. In this case, the difficulty in transferring the entire fracturing fluid supplying device can also be made to be relatively low.

[209] Based on the above content, optionally, in the fluid supplying device disclosed in this embodiment of the present application, the number of the fluid storage container 0100 may be one. By communicating the fluid storage container 0100 with a remote fluid supplying device 0920 and enabling the remote fluid supplying device 0920 to convey clean water to the fluid storage container 0100 in real time, the hydration operation can be continuously carried out on the production site. Alternatively, the volume of the fluid storage container 0100 may also be increased. In this case, clean water may be discontinuously conveyed to the fluid storage container 0100 by using the remote fluid supplying device 0920.

[210] In another embodiment of the present application, the number of the fluid storage containers 0100 may be at least two, and the at least two fluid storage containers 0100 may be jointly installed on the transport device. In this case, on the one hand, it can ensure that the total fluid storage capacity of the fluid storage containers 0100 is relatively large, so that there is no need for the remote fluid supplying device 0920 to continuously convey clean water into the fluid storage containers 0100, thus reducing the overall control difficulty of the fluid supplying process. On the other hand, it also ensures that the size of each fluid storage container 0100 is not relatively large, thus facilitating the manufacturing, installation, and transfer of the fluid storage container 0100. More specifically, the parameters such as shape and size of each fluid storage container 0100 are correspondingly the same, so as to further reduce the difficulty in the manufacturing, installation, and transfer of the fluid storage container 0100.

[211] The hydration apparatus 0200 is configured for mixing materials such as dry powder and chemical additives with clean water in the fluid storage container 0100, and performing stirring to form the base fluid. Of course, the specific type of the base fluid may be adjusted according to the parameters such as the type of the materials added, so as to form the base fluid of the desired type.

[212] The base fluid container is configured for containing the base fluid formed after the hydration apparatus 0200 completes hydration. Similarly, the base fluid container may include a container such as a base fluid tank. Of course, in the present application, the parameters such as shape and size of the base fluid container may also be flexibly selected according to the actual needs, which are not limited here. In addition, the number of the base fluid container may be one. The base fluid main be contained by using the base fluid container. In order to increase the variety of the base fluid that the base fluid container can container, optionally, the base fluid container is provided with at least two containing chambers, so as to respectively contain various base fluids by using multiple containing chambers.

[213] In another embodiment of the present application, there may be multiple base fluid containers, so as to contain various fluids by using the multiple base fluid containers. In addition, if there are multiple base fluid containers, at least two of the multiple base fluid containers may contain the base fluid whose use amount is relatively large, so as to prepare the base fluid whose volume is relatively large and make a sufficient preparation for the proppant mixing process and the production process. Of course, there is no conflict between the two technical implementations described above, that is, when there are multiple base fluid containers are provided, several of the multiple base fluid containers may be configured for respectively containing different types of base fluids. In addition, several of the multiple base fluid containers may be configured for simultaneously containing the base fluid of the same type. Moreover, at least two base fluids may be respectively contained in the multiple base fluid containers.

[214] The proppant mixing apparatus 0400 is configured for mixing particles such as sand with the base fluid stored in the base fluid container to form a fracturing fluid. Of course, the specific type of the fracturing fluid may be adjusted according to the parameters such as the type of the base fluid added, so as to form the fracturing fluid of the desired type. In addition, the proppant mixing apparatus 0400 is further in fluid communication with a downstream device 0930, so that the fracturing fluid formed by the proppant mixing apparatus 0400 can be conveyed to a corresponding area in a mining area through the downstream device 0930, thus improving the production efficiency and the mining thoroughness.

[215] In the present application, the control apparatus 0500 may at least be configured for achieving the purpose of controlling the hydration apparatus 0200 and the hydration operation, so as to control the progress and stop of the hydration operation under corresponding conditions.

[216] In order to achieve the purpose of controlling the hydration operation by using the control apparatus 0500, in the fluid supplying device disclosed in this embodiment of the present application, the fluid storage container 0100 is in fluid communication with the hydration apparatus 0200 through a connecting pipeline, a mixing control valve 0700 is provided on the connecting pipeline, and the mixing control valve 0700 can control the on-off state between the fluid storage container 0100 and the hydration apparatus 0200. Meanwhile, the base fluid container is provided with a fluid level detection element. The fluid level detection element may specifically include a fluid level meter. The actual fluid level of the base fluid in the base fluid container may be detected by using the fluid level detection element.

[217] Correspondingly, the fluid level detection element, the hydration apparatus 0200, and the mixing control valve 0700 are all connected to the control apparatus 0500, so that the information about the actual fluid level in the base fluid container can be transmitted to the control apparatus 0500, thus making the control apparatus 0500 capable of acquiring the information about the actual fluid level in the base fluid container. Specifically, the fluid level detection element, the hydration apparatus 0200, and the mixing control valve 0700 may form an electrical connection relationship with the control apparatus 0500 through cables, so as to ensure that signals such as parameter information and control commands can be transmitted through the cables, thus ensuring that the control reliability and stability are relatively high on the premise of relatively low overall cost. Alternatively, wireless transmission methods may also be adopted, so that the fluid level detection element, the hydration apparatus 0200, and the mixing control valve 0700 form a connection relationship with the control apparatus 0500, thus reducing the difficulty in assembling and minimizing the constraints on the installation of the fluid supplying device.

[218] In addition, when a detection value of the fluid level detection element is less than a first preset value, the control apparatus 0500 can transmit a corresponding control command to the mixing control valve 0700 and the hydration apparatus 0200, so as to control the mixing control valve 0700 to open and control the hydration apparatus 0200 to operation, so that the clean water in the fluid storage container 0100 can be conveyed into the hydration apparatus 0200 through the connecting pipeline and mixed with other materials in the hydration apparatus 0200 to achieve hydration, thus replenishing the base fluid into the base fluid container.

[219] Meanwhile, by communicating the hydration apparatus 0200 with the base fluid container, the base fluid formed through hydration in the hydration apparatus 0200 can be conveyed into the base fluid container, so as to replenish the base fluid into the base fluid container. Of course, the base fluid container is further in fluid communication with the proppant mixing apparatus 0400, and the outlet of the base fluid container is provided with a proppant mixing control valve, so that when it is necessary to produce the fracturing fluid, the proppant mixing control valve can be opened and the proppant mixing apparatus 0400 can be controlled to operate to perform proppant mixing.

[220] In addition, it is to be noted that in a process that the hydration apparatus 0200 performs the hydration operation, it takes a certain amount of time to mix other materials such as dry powder with the clean water. In this process, a blocking function of the hydration apparatus 0200 itself may be used to prevent materials that have not yet been mixed from uncontrollably flowing into the base fluid container. In this case, the blocking function is part of the control operation of the hydration apparatus 0200. Alternatively, another control valve may be provided between the hydration apparatus 0200 and the base fluid container. In this case, the control valve may be controlled to be in a closed state before and during the hydration operation of the hydration apparatus 0200, and the control valve may be opened after the hydration operation of the hydration apparatus 0200 is completed, so that the base fluid formed through hydration in the hydration apparatus 0200 can be conveyed into the base fluid container.

[221] An embodiment of the present application discloses a fracturing fluid supplying device, and its fluid replenishment apparatus is connected to the base fluid container, so that the base fluid can be replenished into the base fluid container when the fluid replenishment apparatus is in an open state. The base fluid container is in fluid communication with the proppant mixing apparatus 0400, and the outlet of the base fluid container is provided with the proppant mixing control valve, so that the proppant mixing control valve can be opened when proppant mixing operation needs to be performed, so as to convey the base fluid in the base fluid container to the proppant mixing apparatus 0400 for the formation process of the fracturing fluid.

[222] Meanwhile, in the fracturing fluid supplying device disclosed in this embodiment of the present application, the base fluid container is provided with the fluid level detection element, the fluid level detection element and the fluid replenishment apparatus are both connected to the control apparatus 0500, and the control apparatus 0500 can control the fluid replenishment apparatus to open when the detection value of the fluid level detection element is less than the first preset value, so as to replenish the base fluid into the base fluid container through the fluid replenishment apparatus. Further, in the present application, the replenishment operation of the base fluid can be automatically controlled according to the actual fluid level in the base fluid container by using the control apparatus 0500, thus saving a lot of manpower, greatly reducing the risk of incorrectly monitoring the fluid level in the base fluid container, and greatly improving the reliability of the fluid supplying device.

[223] As described above, in the fracturing fluid supplying device disclosed in this embodiment of the present application, the commencement and termination of the hydration operation may be controlled by using the control apparatus 0500. Further, the proppant mixing apparatus 0400 and the proppant mixing control valve may also be both connected to the control apparatus 0500, so that the control apparatus 0500 can also control the opening and closing of the proppant mixing apparatus 0400 and the proppant mixing control valve. That is, in the present application, the control apparatus 0500 can also control the starting and stopping of the proppant mixing operation, thus further improving the automation level of the fracturing fluid supplying device. Similarly, the proppant mixing apparatus 0400 and the proppant mixing control valve may also be connected to the control apparatus 0500 through wired or wireless connection according to the actual needs, so that signals such as detection information and control commands can be transmitted between the proppant mixing apparatus 0400, as well as the proppant mixing control valve, and the control apparatus 0500.

[224] By adopting the above technical implementation, the starting and stopping of the proppant mixing operation can be remotely controlled, thus reducing the number of personnel required on the production site and greatly improving the production safety. In addition, in the present application, parameters of corresponding sensors may be configured to automatically control the injection and stop of the fracturing fluid by detecting parameters such as the actual situation of the mining area. In another embodiment of the present application, human operator may be stationed at the control apparatus 0500, so that the an operator can enter corresponding control commands at the control apparatus 0500 based on known information and other factors, and the control apparatus 0500 can correspondingly control the starting and stopping of the proppant mixing operation, thus greatly improving the accuracy of the injection time of the fracturing fluid and improving the mining efficiency and economy.

[225] In the above embodiment, the present application discloses a technical solution capable of automatically achieving the relinquishment of the base fluid into the base fluid container when the fluid level in the base fluid container is relatively low. Generally, with the continuous operation of the hydration apparatus 0200, the fluid level in the base fluid container may continuously increase. Based on this, in order to prevent the hydration operation of the hydration apparatus 0200 from causing the base fluid to overflow from the base fluid container, in a specific embodiment of the present application, a second preset value may be set, and the hydration apparatus 0200 is controlled to stop operating when the fluid level in the base fluid container reaches the second preset value. 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 may be flexibly selected according to the actual needs, which are not limited here.

[226] In addition, as described above, the working process of the proppant mixing apparatus 0400 consumes the base fluid in the base fluid container. Therefore, when other factors are not considered, the fluid level in the base fluid container will continuously decrease during the operation of the proppant mixing apparatus 0400. Correspondingly, when the proppant mixing apparatus 0400 is shut down and unexpected situations such as leakage are not considered, the fluid level in the base fluid container will not change. Based on the above situation, when the fluid supplying device operates, as the proppant mixing apparatus 0400 continuously consumes the base fluid in the base fluid container, the fluid level in the base fluid container will drop to the first preset value. In this case, the hydration apparatus 0200 enters an operating state to replenish the base fluid into the base fluid container.

[227] As is well known, operation of the hydration apparatus 0200 will raise the fluid level in the base fluid container, while operation of the proppant mixing apparatus 0400 will lower the fluid level in the base fluid container. Based on this, when the hydration apparatus 0200 and the proppant mixing apparatus 0400 are both operating, the actual fluid level in the base fluid container is directly related to the specific value of the difference between the replenishment rate of the hydration apparatus 0200 and the consumption rate of the proppant mixing apparatus 0400. Of course, in order to ensure that the hydration efficiency does not hinder the continuity of the operation of the proppant mixing apparatus 0400, in a specific embodiment of the present application, the base fluid may be stored in the base fluid container at a relatively high fluid level before the proppant mixing apparatus 0400 in the fluid supplying device starts to operate. For example, the base fluid container may be fully filled with the base fluid, and in such case, the first preset value may be 100%; and / or the hydration apparatus 0200 may be enabled to enter the operating state in advance before the proppant mixing apparatus 0400 starts to operate, and then the proppant mixing apparatus 0400 is enabled to operate, while the hydration apparatus 0200 is kept to operate continuously, correspondingly, in such a case, the first preset value may be set to be relatively large, such as 90% or 100%etc., so as to ensure that the above technical solution can be implemented correspondingly.

[228] Of course, in order to well prevent the hydration efficiency from being too low and causing the fluid level in the base fluid container to continuously decrease even if the hydration apparatus 0200 is normally and continuously operating, in this embodiment of the present application, consumption rate of the base fluid of the proppant mixing apparatus 0400 may be made less than or equal to the replenishment rate of the base fluid of the hydration apparatus 0200 when the proppant mixing apparatus 0400 operates. Of course, the above consumption rate and replenishment rate are both average values, that is, the consumption rate involves a duration from beginning of supplying the base fluid into the proppant mixing apparatus 0400 at a previous time to the time that the base fluid needs to be fed into the proppant mixing apparatus 0400 again. This duration includes a time period that the proppant mixing apparatus 0400 performs proppant mixing operation, although theoretically there is no process of base fluid consumption in the above time period. Similarly, the replenishment rate of the base fluid comprehensively considers the formation process of the base fluid and the time required to convey the base fluid to the base fluid container, and is the average replenishment rate of the base fluid obtained accordingly. In this case, even if the first preset value is relatively low, such as 50% or 70%, it can prevent the proppant mixing apparatus 0400 from being unable to operate normally due to insufficient base fluid.

[229] Of course, with the above technical solution being adopted, if the replenishment efficiency of the base fluid is greater than the consumption rate of the base fluid, as the time length of the working duration of the hydration apparatus 0200 continues to increase, it will also cause the fluid level in the base fluid container to reach the first preset value again. At this time, if the hydration apparatus 0200 continues to operate, there is still a risk that the base fluid overflows from the base fluid container. Therefore, in this case, a second preset value may be set and the hydration apparatus 0200 may be controlled to stop operating when the fluid level in the base fluid container reaches the second preset value. Of course, with the continuous working of the proppant mixing apparatus 0400, the fluid level in the base fluid container will also be less than the first preset value again. At this time, the hydration apparatus 0200 is controlled to operate again until the fluid level in the base fluid container reaches the second preset value again. This cycle will continue until the proppant mixing apparatus 0400 stops operating.

[230] With the above technical solution being adopted, and when the proppant mixing apparatus 0400 stops operating, the fluid level in the base fluid container is usually greater than or equal to the first preset value. In this case, optionally, when the proppant mixing apparatus 0400 is in a shutdown state, if the fluid level in the base fluid container is not less than the first preset value, the hydration apparatus 0200 may be put into an idle state.

[231] In order to further improve the readiness of the fluid supplying device for the next period of operation, in other embodiments of the present application, when the proppant mixing apparatus 0400 is shut down and the fluid level in the base fluid container is less than the second preset value, the control apparatus 0500 may control the hydration apparatus 0200 to operate and control the mixing control valve 0700 to open for the hydration operation, so as to replenish the base fluid into the base fluid container until the fluid level in the base fluid container is not less than a second preset value. Of course, the second preset value is greater than the first preset value, and the actual parameters of the two may be flexibly determined according to the actual needs.

[232] As described above, when the fluid level in the base fluid container is less than the first preset value, regardless of whether the proppant mixing apparatus 0400 is operating or shut down, the hydration apparatus 0200 may be enabled to operating until the fluid level in the base fluid container reaches the second preset value.

[233] However, considering that the operational period of the proppant mixing apparatus 0400 is usually relatively long, in such a case, in order to prevent frequent starting and stopping of the hydration apparatus 0200, which may have a significant adverse effect on the reliability and service life of the hydration apparatus 0200, in another embodiment of the present application, the hydration apparatus 0200 is controlled to operate when the proppant mixing apparatus 0400 is in the operating state and the fluid level in the base fluid container is less than the first preset value. In the above operation process of the hydration apparatus 0200, the hydration apparatus 0200 may be enabled to operate initially at a preset power level so as to raise the fluid level in the base fluid container again. That is, when operating at the above-described preset power, the replenishment rate of the base fluid of the hydration apparatus 0200 is greater than the consumption rate of the base fluid of the proppant mixing apparatus 0400.

[234] As described above, as the hydration apparatus 0200 continues to operate at the above preset power level for a corresponding duration, the fluid level in the base fluid container will reach the first preset value again. Then the hydration apparatus 0200 may be controlled to reduce the operating power level, that is, the hydration apparatus 0200 may be controlled to operate at another preset power level lower than the initial preset power level. In this case, depending on the specific parameter value of the other preset power level, there are three possible outcomes: the fluid level in the base fluid container may continuously rise still, may remain unchanged, or may continuously drop.

[235] Afterwards, if the fluid level in the base fluid container still continues to rise, the working power level of the hydration apparatus 0200 may be further reduced until the fluid level in the base fluid container remains unchanged or continuously drops.

[236] Otherwise, if the fluid level in the base fluid container continuously drops, after the fluid level in the base fluid container is less than the first preset value again, the working power level of the hydration apparatus 0200 may be increased again. Of course, the increased working power level of the hydration apparatus 0200 is still less than the above initial preset power level. Afterwards, if the fluid level in the base fluid container continues to drop, the working efficiency of the hydration apparatus 0200 may be further increased until the fluid level in the base fluid container remains unchanged. Otherwise, if the fluid level in the base fluid container rises again to the first preset value after the working efficiency of the hydration apparatus 0200 is increased for the first time, the working power level of the hydration apparatus 0200 may be further reduced until the fluid level in the base fluid container remains unchanged.

[237] In general, in an embodiment of the present application, when the proppant mixing apparatus 0400 is in the operating state and the fluid level in the base fluid container is less than the first preset value, the hydration apparatus 0200 may be controlled to operate. After the fluid level in the base fluid container reaches the first preset value again, the hydration apparatus 0200 may be controlled to operate at the preset power level, so that the replenishment rate of the base fluid of the hydration apparatus 0200 is equal to the consumption rate of the base fluid of the proppant mixing apparatus 0400, thus preventing the situation of insufficient base fluid from occurring in the proppant mixing process of the proppant mixing apparatus 0400 without shutting down the hydration apparatus 0200, and ensuring the continuity and time efficiency of the production process.

[238] In addition, it is considered that when the working power of the hydration apparatus 0200 is relatively large, the wear is relatively large, the load of the hydration apparatus 0200 is relatively large, the energy consumption is large and the energy waste is more significant, in a specific embodiment of the present application, when the proppant mixing apparatus 0400 is in the shutdown state and the fluid level in the base fluid container is less than the first preset value, the hydration apparatus 0200 may be enabled to operate at a second preset power. When the proppant mixing apparatus 0400 is in the operating state and the fluid level in the base fluid container is less than the first preset value, the hydration apparatus 0200 may be enabled to operate at a power level greater than the second preset power level (for example, the power level may be the first preset power). Of course, the specific values of the second preset power level and the first preset power level described above may be determined according to the actual situation. In addition, in order to reduce the control difficulty, the above second preset power may be a certain fixed value. To ensure the supplying continuity of the base fluid and prevent frequent starting and stopping of the hydration apparatus 0200, the first preset power may include multiple values. Of course, any value of the first preset power is greater than that of the second preset power.

[239] As described above, there may be multiple base fluid containers. In regard to this, in an embodiment of the present application, the base fluid container may include a first base fluid container 0310 and a second base fluid container 0320, correspondingly the proppant mixing control valve may include a first control valve 0810 and a third control valve 0830, the fluid level detection element may include a first detector 0610 and a second detector 0620, where the first base fluid container 0310 may be configured for containing a first base fluid, and the second base fluid container 0320 may be configured for containing a second base fluid. Specifically, the first base fluid may include slickwater, the second base fluid may include a guar gum fluid, and of course, the first base fluid and the second base fluid may also include other types of base fluids, which are not limited here.

[240] With the above technical implementation, the first detector 0610 is provided on the first base fluid container 0310, and the second detector 0620 is provided on the second base fluid container 0320, so that the actual fluid levels of the base fluids in the first base fluid container 0310 and the second base fluid container 0320 can be detected respectively by using the first detector 0610 and the second detector 0620. Meanwhile, inlets of the first base fluid container 0310 and the second base fluid container 0320 are both in fluid communication with the hydration apparatus 0200, and outlets of the first base fluid container 0310 and the second base fluid container 0320 are both in fluid communication with the proppant mixing apparatus 0400, so that the base fluids formed through hydration in the hydration apparatus 0200 can be correspondingly conveyed into the first base fluid container 0310 and the second base fluid container 0320 according to the types, and correspondingly, the base fluids stored in the first base fluid container 0310 and the second base fluid container 0320 can be respectively conveyed into the proppant mixing apparatus 0400 according to the actual needs.

[241] Of course, in order to achieve the selection of conveying paths for the base fluids in the hydration apparatus 0200 and the selection of sources of the base fluids in the proppant mixing apparatus 0400, in the present application, the inlets of the first base fluid container 0310 and the second base fluid container 0320 are respectively provided with a second control valve 0820 and a fourth control valve 0840, and the outlets of the first base fluid container 0310 and the second base fluid container 0320 are respectively provided with a first control valve 0810 and a third control valve 0830. Specifically, the second control valve 0820 may be provided on a communicating pipeline between the inlet of the first base fluid container 0310 and the hydration apparatus 0200, the fourth control valve 0840 may be provided on a communicating pipeline between the inlet of the second base fluid container 0320 and the hydration apparatus 0200, the first control valve 0810 may be provided on a communicating pipeline between the outlet of the first base fluid container 0310 and the proppant mixing apparatus 0400, and the third control valve 0830 may be provided on a communicating pipeline between the outlet of the second base fluid container 0320 and the proppant mixing apparatus 0400. Specifically, the first control valve 0810, the second control valve 0820, the third control valve 0830, and the fourth control valve 0840 may be all electric control valves. Of course, in other embodiments of the present application, the above valves may also be pneumatic valves, which are not limited here. Similarly, the above mixing control valve 0700 may also be selected to be an electric control valves or a pneumatic valve according to the actual needs.

[242] 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 apparatus 0500, so that when the detection value of the first detector 0610 is less than the first preset value, the control apparatus 0500 can control the mixing control valve 0700 and the second control valve 0820 to open, and control the hydration apparatus 0200 to work; and when the detection value of the second detector 0620 is less than the first preset value, the control apparatus 0500 can control the mixing control valve 0700 and the fourth control valve 0840 to both open, and control the hydration apparatus 0200 to work.

[243] That is, in an embodiment of the present application, if different types of base fluids, i.e., the first base fluid and the second base fluid, are respectively contained in the first base fluid container 0310 and the second base fluid container 0320, the first detector 0610 and the second detector 0620 may be configured to respectively detect the fluid levels in the first base fluid container 0310 and the second base fluid container 0320; and when the fluid levels in the first base fluid container 0310 and the second base fluid container 0320 are lower than the first preset value, the control valves connected to the two are controlled to open, so as to enable the hydration apparatus 0200 to perform the hydration operation and replenish the corresponding base fluids into the first base fluid container 0310 and the second base fluid container 0320.

[244] It is to be noted that usually at the same time point, only one of the first base fluid container 0310 and the second base fluid container 0320 is in fluid communication with the proppant mixing apparatus 0400 to perform the preparation work of the fracturing fluid. That is, in the present application, although the first detector 0610 and the second detector 0620 are both connected to the control apparatus 0500, at the same time, usually only one of the first detector 0610 and the second detector 0620 is triggered and transmits a corresponding signal to enable the hydration apparatus 0200 to work and perform the hydration work of the base fluid of the corresponding type, so as to replenish the base fluid of the corresponding type to the base fluid container corresponding to the detector that transmits the signal.

[245] In addition, in a process that the hydration apparatus 0200 performs the hydration operation, a blocking function of the hydration apparatus 0200 itself may be used to prevent the base fluid that has not yet finished hydration from flowing into the first base fluid container 0310 or the second base fluid container 0320. Alternatively, the starting and stopping of the operation of the hydration apparatus 0200, the opening and closing of the second control valve 0820, the fourth control valve 0840, and the mixing control valve 0700 may be controlled by stages. Specifically, when the hydration operation is required, the mixing control valve 0700 and the hydration apparatus 0200 may be opened firstly to perform the hydration operation of the base fluid. After the base fluid finishes the hydration operation, the second control valve 0820 or the fourth control valve 0840 may be controlled correspondingly to open according to the type of the base fluid configured for hydration.

[246] In addition, in an embodiment of the present application, a third base fluid container 0330 and a fourth base fluid container 0340 may be provided, and the third base fluid container 0330 and the fourth base fluid container 0340 may be respectively provided with a third detector 0630 and a fourth detector 0640, so as to respectively detect the actual fluid levels of the base fluids in the third base fluid container 0330 and the fourth base fluid container 0340. Correspondingly, inlets and outlets of the third base fluid container 0330 and the fourth base fluid container 0340 may also be respectively provided with corresponding control valves, the inlets of the two may be both in fluid communication with the hydration apparatus 0200, and the outlets of the two may be both in fluid communication with the proppant mixing apparatus 0400. In this case, the control apparatus 0500 may also be configured for controlling the above control valves, so as to flexibly control the hydration apparatus 0200 to respectively replenish a third base fluid and a fourth base fluid into the third base fluid container 0330 and the fourth base fluid container 0340 according to the actual needs. It is considered that the conciseness of the text, no detailed introduction will be made here.

[247] As described above, at least two base fluid containers may be configured for the same base fluid. In this case, the first base fluid container 0310 and the second base fluid container 0320 may be both configured for containing the first base fluid, and the first base fluid may be specifically slickwater or a guar gum fluid.

[248] With the above technical solution being adopted, for the assembling of the first base fluid container 0310 and the second base fluid container 0320, a reference may be made to the above embodiment. A difference between this embodiment of the present application and the above embodiment also lies in the following: in the embodiment of the present application, a bottom of the first base fluid container 0310 and a bottom of the second base fluid container 0320 are in fluid communication with each other, so that in case the proppant mixing apparatus 0400 needs to use the first base fluid to prepare the fracturing fluid, at least one of the first control valve 0810 provided at the outlet of the first base fluid container 0310 and the third control valve 0830 provided at the outlet of the second base fluid container 0320 can be opened to feed the first base fluid to the proppant mixing apparatus 0400.

[249] As described above, with the continuous progress of the proppant mixing operation, the fluid levels in the first base fluid container 0310 and the second base fluid container 0320 will continue to drop. Therefore, in order to prevent the continuity of the proppant mixing operation from being affected, in this embodiment of the present application, when the detection value of at least one of the first detector 0610 and the second detector 0620 is less than the first preset value, the control apparatus 0500 will control the mixing control valve 0700, the second control valve 0820, and the fourth control valve 0840 to be all open, and control the hydration apparatus 0200 to operate, so that the first base fluid can be replenished into the first base fluid container 0310 and the second base fluid container 0320 at the same time. Similarly, in the process of the hydration operation, the blocking function of the hydration apparatus 0200 itself may also be used to prevent the base fluid that has not yet finished the hydration operation from flowing into the first base fluid container 0310 and the second base fluid container 0320. Alternatively, referring to the above embodiment, it may also sequentially control by stages the hydration apparatus 0200 and the mixing control valve 0700 to open, and control the second control valve 0820 and the fourth control valve 0840 to open.

[250] Based on the fracturing fluid supplying device disclosed in the above embodiment, when the fluid level detection element and the fluid replenishment apparatus are both connected to the control apparatus, an embodiment of the present application further discloses a control method. The control method may be applied to the fluid supplying device described above. Of course, for the specific structure of the fluid supplying device and the connection and assembling relationships between components, a reference may be made to the above embodiment. As shown in FIG. 16, the control method includes:S1: acquiring an actual fluid level in the base fluid container; andS2: controlling the fluid replenishment apparatus to open to replenish the base fluid into the base fluid container when the actual fluid level is less than the first preset value.

[251] As described above, the fluid level detection element provided on the base fluid container may be used to detect the actual fluid level in the base fluid container, thus acquiring the actual fluid level in the base fluid container. Correspondingly, the fluid level detection element may transmit its own detection value to the control apparatus, so that the control apparatus can control the fluid replenishment apparatus to open when the actual fluid level is less than the first preset value, so as to replenish the base fluid into the base fluid container.

[252] In order to further improve the automation level of the fluid supplying device, in the fracturing fluid supplying device disclosed in the embodiment of the present application, the starting and stopping of the hydration operation may also be controlled by using the control apparatus. In regard to this, the proppant mixing apparatus and the proppant mixing control valve may be both connected to the control apparatus, so that the control apparatus can also control starting and stopping of the operation of the proppant mixing apparatus and opening and closing the proppant mixing control valve. That is, in the present application, the control apparatus can also control the starting and stopping of the proppant mixing operation, thus further improving the automation level of the fracturing fluid supplying device.

[253] By adopting the above technical solution, the starting and stopping of the proppant mixing operation can be remotely controlled, thus reducing the number of personnel configured on the production site and greatly improving the production safety. In addition, in the present application, parameters of corresponding sensors may be configured to automatically control the injection and stop of the fracturing fluid by detecting parameters such as the actual situation of the mining area. In another embodiment of the present application, personnel may be configured at the control apparatus, so that a human operator can enter corresponding control commands into the control apparatus based on known information and other factors, and the control apparatus can correspondingly control the starting and stopping of the proppant mixing operation, thus greatly improving the accuracy of the injection time of the fracturing fluid and improving the mining efficiency and economy.

[254] In a specific embodiment of the present application, the fluid replenishment apparatus may include a fluid storage container and a hydration apparatus which are connected to each other, and the hydration apparatus is further connected to the base fluid container. This has been introduced above, which will not be repeated here. Based on the above embodiment, the hydration apparatus and the mixing control valve may be both connected to the control apparatus. Therefore, in the control method disclosed in an embodiment of the present application, the above step SS2 may include:S21: controlling the mixing control valve to open and controlling the hydration apparatus to work to replenish the base fluid into the base fluid container when the actual fluid level is less than the first preset value.

[255] As described above, the fluid level detection element, the hydration apparatus, and the mixing control valve are all connected to the control apparatus, so that the information about the actual fluid level in the base fluid container can be transmitted to the control apparatus, thus making the control apparatus capable of acquiring the information about the actual fluid level in the base fluid container.

[256] In addition, when the detection value of the fluid level detection element, i.e., the actual fluid level in the base fluid container, is less than the first preset value, the control apparatus can transmit a corresponding control command to the mixing control valve and the hydration apparatus, so as to control the mixing control valve to open and the hydration apparatus to work, so that the clean water in the fluid storage container can be conveyed into the hydration apparatus through the connecting pipeline and mixed with other materials in the hydration apparatus to achieve hydration. Meanwhile, by communicating the hydration apparatus with the base fluid container, the base fluid formed through hydration in the hydration apparatus can be conveyed into the base fluid container, so as to replenish the base fluid into the base fluid container.

[257] In addition, it is to be noted that in a process that the hydration apparatus performs the hydration work, it takes a certain time to mix other materials such as dry powder with the clean water. In this process, a blocking function of the hydration apparatus itself may be used to prevent materials that have not yet been mixed front uncontrollably flowing into the base fluid container. In this case, the blocking function is part of the control work of the above hydration apparatus. Alternatively, another control valve may be provided between the hydration apparatus and the base fluid container. In this case, the above control valve may be controlled to be in a closed state before and during the hydration work of the hydration apparatus, and the above control valve may be opened after the hydration work of the hydration apparatus is completed, so that the base fluid formed through hydration in the hydration apparatus can be conveyed into the base fluid container.

[258] Based on the above embodiment, in order to further improve the readiness of the fluid supplying device for the next period of operation, in a specific embodiment of the present application, when the proppant mixing apparatus is shut down and the fluid level in the base fluid container is less than the second preset value, the control apparatus may control the fluid replenishment apparatus to open, so as to replenish the base fluid into the base fluid container until the fluid level in the base fluid container is not less than a second preset value. Of course, the second preset value is greater than the first preset value, and the actual parameters of the two may be flexibly determined according to the actual needs.

[259] That is, in this embodiment of the present application, the above S21 may specifically include:controlling the fluid replenishment apparatus to open and replenish the base fluid to the base fluid container until the actual fluid level reaches a second preset value when the proppant mixing apparatus is in a shutdown state and the actual fluid level is less than the first preset value, where the second preset value is greater than the first preset value.

[260] The working command of the proppant mixing apparatus is transmitted from the control apparatus. In regard to this, the control apparatus may acquire the real-time operational state of the proppant mixing apparatus. In the above embodiment, the fluid replenishment apparatus may include a control valve, the control valve is externally connected to the base fluid device, and the base fluid in the base fluid device can be replenished into the base fluid container through the control valve when the control valve is opened.

[261] In another embodiment of the present application, as described above, the fluid replenishment apparatus may include a fluid storage container and a hydration apparatus. In this case, the fluid supplying device disclosed in this embodiment of the present application itself has the ability to prepare and form the base fluid, thus greatly improving the autonomy and independence of the fluid supplying device. Based on this, in the following embodiments of the present application, for ease of description, description will be made by taking the fluid replenishment apparatus including a fluid storage container and a hydration apparatus.

[262] As described above, when the proppant mixing apparatus is in the shutdown state, the fluid replenishment apparatus may be controlled to close when the fluid level in the base fluid container reaches the second preset value, so as to stop replenishing the base fluid into the base fluid container.

[263] Similarly, when the proppant mixing apparatus is in the working state, (the hydration apparatus in) the fluid replenishment apparatus may be controlled to stop operating when the actual fluid level reaches the second preset value. However, it is considered that the working duration of the proppant mixing apparatus is usually relatively long, in this case, in order to prevent the frequent starting and stopping of the hydration apparatus, which may have a significant adverse effect on the reliability and service life of the hydration apparatus, in another embodiment of the present application, the hydration apparatus is controlled to continue to work when the proppant mixing apparatus is in the operating state and the fluid level in the base fluid container is less than the first preset value. That is, when the proppant mixing apparatus works, once the fluid level in the base fluid container is lower than the first preset value, the hydration apparatus may be controlled to enter the operating state until the proppant mixing apparatus stops working.

[264] Of course, in order to ensure that the working continuity of the proppant mixing apparatus is not influenced by the hydration apparatus, in the above working process of the hydration apparatus, the hydration apparatus may be enabled to work firstly at a predetermined power to raise the fluid level in the base fluid container again. That is, in the case of working at the above certain preset power, the replenishment rate of the base fluid of the hydration apparatus is greater than the consumption rate of the base fluid of the proppant mixing apparatus, thus avoiding the situation that the proppant mixing apparatus is required to stop working since the amount of the base fluid is insufficient.

[265] As described above, as the hydration apparatus continues to work at the above certain preset power for a corresponding duration, the fluid level in the base fluid container will reach the first preset value again. In this case, the hydration apparatus may be enabled to reduce the working power, that is, the hydration apparatus may be enabled to work at another preset power. The above another preset power is less than the above certain preset power. In this case, according to the specific parameter value of the above another preset power, there may be three situations, including that the fluid level in the base fluid container continues to rise, the fluid level remains unchanged, and the fluid level continues to drop.

[266] Afterwards, if the fluid level in the base fluid container continues to rise, the working power of the hydration apparatus may be further reduced until the fluid level in the base fluid container remains unchanged or continues to drop.

[267] On the contrary, if the fluid level in the base fluid container continues to drop, after the fluid level in the base fluid container is less than the first preset value again, the working power of the hydration apparatus may be increased again. Of course, the increased working power of the hydration apparatus is still less than the above certain preset power. Afterwards, if the fluid level in the base fluid container still continues to drop, the working power of the hydration apparatus may be further increased until the fluid level in the base fluid container remains unchanged. On the contrary, if the fluid level in the base fluid container rises again to the first preset value after the working power of the hydration apparatus is increased for the first time, the working power of the hydration apparatus may be further reduced until the fluid level in the base fluid container remains unchanged.

[268] In general, in an embodiment of the present application, when the proppant mixing apparatus is in the operating state and the fluid level in the base fluid container is less than the first preset value, the hydration apparatus may be controlled to work at a preset power. When the hydration apparatus works at the above preset power, the replenishment rate of the base fluid of the hydration apparatus is enabled to be equal to the consumption rate of the base fluid of the proppant mixing apparatus, thus preventing the situation of insufficient base fluid from occurring in the proppant mixing process of the proppant mixing apparatus without shutting down the hydration apparatus, and ensuring the continuity and time efficiency of the production process.

[269] That is, in this embodiment of the present application, the above step S21 includes:controlling the mixing control valve to open and controlling the hydration apparatus to hydrate the base fluid at a first preset power when the proppant mixing apparatus is in the operating state and the actual fluid level is less than the first preset value, where a replenishment rate of the base fluid of the hydration apparatus when working at the first preset power is equal to a consumption rate of the base fluid of the proppant mixing apparatus.

[270] Of course, the above steps may also be divided, so that the above step includes:controlling the mixing control valve to open and controlling the hydration apparatus to hydrate the base fluid at a first preset power when the proppant mixing apparatus is in the operating state and the actual fluid level is less than the first preset value;after a first preset duration, if the actual fluid level continues to drop, controlling the actual power of the hydration apparatus to increase by a first preset power difference (i.e., ΔK) until the replenishment rate of the base fluid of the hydration apparatus when working at the first preset power is equal to the consumption rate of the base fluid of the proppant mixing apparatus, where the new first preset power is equal to a sum of the original first preset power and the first preset power difference; andafter the first preset duration, if the actual fluid level rises again, controlling the power of the hydration apparatus to decrease by a second preset power difference until the replenishment rate of the base fluid of the hydration apparatus when working at the first preset power is equal to the consumption rate of the base fluid of the proppant mixing apparatus. Of course, the second preset power difference needs to be less than the first preset power difference, so as to ensure that the hydration apparatus can determine its final working power in a power adaption process, so that replenishment rate of its base fluid is equal to the consumption rate of the base fluid of the proppant mixing apparatus.

[271] Of course, in practical applications, the value of the first preset power may be set according to the actual situation, and the replenishment rate of the base fluid of the hydration apparatus when working at the first preset power is enabled to be not less than the consumption rate of the base fluid of the proppant mixing apparatus, so as to reduce the control difficulty. Where, the consumption rate of the base fluid of the proppant mixing apparatus may be obtained according to parameters such as the set power of the proppant mixing apparatus, and the replenishment rate of the base fluid of the hydration apparatus may be obtained according to a relationship such as a proportional relation between the power of the hydration apparatus and the replenishment rate of the base fluid, which will not be introduced in detail here.

[272] In addition, considering that when the working power of the hydration apparatus is relatively large, the wear is relatively large, the load of the hydration apparatus is relatively large, the energy consumption is large and the energy waste is more significant, in a specific embodiment of the present application, when the proppant mixing apparatus is in the shutdown state and the fluid level in the base fluid container is less than the first preset value, the hydration apparatus may be enabled to work at a second preset power level. When the proppant mixing apparatus is in the operating state and the fluid level in the base fluid container is less than the first preset value, the hydration apparatus may be enabled to work at a power greater than the second preset power level (for example, the above power level may be the first preset power level). Of course, the specific values of the above second preset power and the above first preset power level may be determined according to the actual situation. In addition, in order to reduce the control difficulty, the above second preset power level may be a certain fixed value. To ensure the supplying continuity of the base fluid and prevent frequent starting and stopping of the hydration apparatus, the first preset power level may include multiple values. Of course, any value of the first preset power level is greater than that of the second preset power level.

[273] That is, in this embodiment of the present application, before the above step S2, the control method further includes:acquiring an operating state of the proppant mixing apparatus.

[274] As described above, the operating state of the proppant mixing apparatus is controlled by the control apparatus. In regard to this, the control apparatus may acquire the operating state of the proppant mixing apparatus. Of course, in order to ensure the accuracy of acquiring the operating state of the proppant mixing apparatus, a flow meter 0910 may be provided at the outlet of the proppant mixing apparatus, and the operating state of the proppant mixing apparatus may be determined by using the detection value of the flow meter 0910. Alternatively, the above two solutions may be adopted to cooperatively acquire the working state of the proppant mixing apparatus.

[275] Based on the above content, the above step S21 includes:controlling the mixing control valve to open and controlling the hydration apparatus to hydrate the base fluid at the second preset power level to replenish the base fluid into the base fluid container when the proppant mixing apparatus is in a shutdown state and the actual fluid level is less than the first preset value; andcontrolling the mixing control valve to open and controlling the hydration apparatus to hydrate the base fluid at a power level greater than the second preset power level to replenish the base fluid into the base fluid container when the proppant mixing apparatus is in the operating state and the actual fluid level is less than the first preset value.

[276] As described above, there may be multiple base fluid containers. In regard to this, in an embodiment of the present application, the base fluid containers may include a first base fluid container and a second base fluid container, correspondingly the proppant mixing control valve may include a first control valve and a third control valve, the fluid level detection element may include a first detector and a second detector, the first base fluid container may be configured for containing a first base fluid, and the second base fluid container may be configured for containing a second base fluid. Specifically, the first base fluid may include slickwater, the second base fluid may include a guar gum fluid, and of course, the first base fluid and the second base fluid may also include other types of base fluids, which are not limited here.

[277] With the above technical implementation, the first detector is provided on the first base fluid container, and the second detector is provided on the second base fluid container, so that the actual fluid levels of the base fluids in the first base fluid container and the second base fluid container can be detected respectively by using the first detector and the second detector. Meanwhile, inlets of the first base fluid container and the second base fluid container are both in fluid communication with the hydration apparatus, and outlets of the first base fluid container and the second base fluid container are both in fluid communication with the proppant mixing apparatus, so that the base fluids formed through hydration in the hydration apparatus can be correspondingly conveyed into the first base fluid container and the second base fluid container according to the types, and correspondingly, the base fluids stored in the first base fluid container and the second base fluid container can be respectively conveyed into the proppant mixing apparatus according to the actual needs.

[278] Of course, in order to achieve the selection of conveying paths for the base fluids in the hydration apparatus and the selection of sources of the base fluids in the proppant mixing apparatus, in the present application, the inlets of the first base fluid container and the second base fluid container are respectively provided with a second control valve and a fourth control valve, and the outlets of the first base fluid container and the second base fluid container are respectively provided with a first control valve and a third control valve. Specifically, the second control valve may be provided on a communicating pipeline between the inlet of the first base fluid container and the hydration apparatus, the fourth control valve may be provided on a communicating pipeline between the inlet of the second base fluid container and the hydration apparatus, the first control valve may be provided on a communicating pipeline between the outlet of the first base fluid container and the proppant mixing apparatus, and the third control valve may be provided on a communicating pipeline between the outlet of the second base fluid container and the proppant mixing apparatus. Specifically, the first control valve, the second control valve, the third control valve, and the fourth control valve may be all electric control valves. Of course, in other embodiments of the present application, the above valves may also be pneumatic valves, which are not limited here. Similarly, the above mixing control valve may also be selected to be an electric control valves or a pneumatic valve according to the actual needs.

[279] 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 apparatus, so that when the detection value of the first detector is less than the first preset value, the control apparatus can control the mixing control valve and the second control valve to open, and control the hydration apparatus to work; and when the detection value of the second detector is less than the first preset value, the control apparatus can control the mixing control valve and the fourth control valve to both open, and control the hydration apparatus to work.

[280] That is, in this embodiment of the present application, if different types of base fluids, i.e., the first base fluid and the second base fluid, are respectively contained in the first base fluid container and the second base fluid container, the first detector and the second detector may be used to respectively detect the fluid levels in the first base fluid container and the second base fluid container; and when the fluid levels in the first base fluid container and the second base fluid container are lower than the first preset value, the control valves connected to the two are controlled to open, so as to enable the hydration apparatus to perform the hydration work and replenish the corresponding base fluids into the first base fluid container and the second base fluid container.

[281] It should be noted that usually at the same time, only one of the first base fluid container and the second base fluid container is in fluid communication with the proppant mixing apparatus to perform the preparation work of the fracturing fluid. That is, in the present application, although the first detector and the second detector are both connected to the control apparatus, at the same time, usually only one of the first detector and the second detector is triggered and transmits a corresponding signal to enable the hydration apparatus to work and perform the hydration work of the base fluid of the corresponding type, so as to replenish the base fluid of the corresponding type to the base fluid container corresponding to the detector that transmits the above signal.

[282] In addition, in a process that the hydration apparatus performs the hydration work, a blocking function of the hydration apparatus itself may be used to prevent the base fluid that has not yet finished hydration from flowing into the first base fluid container or the second base fluid container. Alternatively, the opening and closing of the hydration apparatus, the second control valve, the fourth control valve, and the mixing control valve may be controlled by stages. Specifically, when the hydration work is required, the mixing control valve and the hydration apparatus may be opened firstly to perform the hydration work of the base fluid. After the base fluid finishes the hydration work, the second control valve or the fourth control valve may be controlled correspondingly to open according to the type of the base fluid configured for hydration.

[283] In addition, in this embodiment of the present application, a third base fluid container and a fourth base fluid container may be provided, and the third base fluid container and the fourth base fluid container may be respectively provided with a third detector and a fourth detector, so as to respectively detect the actual fluid levels of the base fluids in the third base fluid container and the fourth base fluid container. Correspondingly, inlets and outlets of the third base fluid container and the fourth base fluid container may also be respectively provided with corresponding control valves, the inlets of the two may be both in fluid communication with the hydration apparatus, and the outlets of the two may be both in fluid communication with the proppant mixing apparatus. In this case, the control apparatus may also be configured for controlling the above control valves, so as to flexibly control the hydration apparatus to respectively replenish a third base fluid and a fourth base fluid into the third base fluid container and the fourth base fluid container according to the actual needs. It is considered that the conciseness of the text, no detailed introduction will be made here.

[284] Regarding the above technical content, in general, in the control method disclosed in this embodiment of the present application, the above step S1 may include:acquiring a first actual fluid level in the first base fluid container and a second actual fluid level in the second base fluid container.

[285] Correspondingly, the above step S21 may include:controlling the mixing control valve to open and controlling the hydration apparatus to work to replenish the first base fluid into the first base fluid container when the first actual fluid level is less than the first preset value; andcontrolling the mixing control valve to open and controlling the hydration apparatus to work to replenish the second base fluid into the second base fluid container when the second actual fluid level is less than the first preset value.

[286] Of course, after the hydration apparatus completes the hydration work of the first base fluid, the first base fluid may be conveyed to the first base fluid container, so that the fluid level in the first base fluid container reaches or exceeds the first preset value. Correspondingly, after the hydration apparatus completes the hydration work of the second base fluid, the second base fluid may be conveyed to the second base fluid container, so that the fluid level in the second base fluid container reaches or exceeds the first preset value.

[287] Correspondingly, at least two base fluid containers may be provided for the same base fluid. In this case, the first base fluid container and the second base fluid container may be both configured for containing the first base fluid, and the first base fluid may be specifically slickwater or a guar gum fluid.

[288] With the above technical solution being adopted, for the assembling of the first base fluid container and the second base fluid container, a reference may be made to the above embodiment. A difference between this embodiment of the present application and the above embodiment also lies in the following: in this embodiment of the present application, a bottom of the first base fluid container and a bottom of the second base fluid container are in fluid communication with each other, so that when the proppant mixing apparatus needs to use the first base fluid to prepare the fracturing fluid, at least one of the first control valve provided at the outlet of the first base fluid container and the third control valve provided at the outlet of the second base fluid container can be opened to feed the first base fluid to the proppant mixing apparatus.

[289] As described above, with the continuous progress of the proppant mixing operation, the fluid levels in the first base fluid container and the second base fluid container will continue to drop. Therefore, in order to prevent affecting the continuity of the proppant mixing operation, in an embodiment of the present application, when the detection value of at least one of the first detector and the second detector is less than the first preset value, the control apparatus will control the mixing control valve, the second control valve, and the fourth control valve to all open, and control the hydration apparatus to operate, so that the first base fluid can be replenished into the first base fluid container and the second base fluid container at the same time. Similarly, in the process of the hydration operation, the blocking function of the hydration apparatus itself may also be used to prevent the base fluid that has not yet finished the hydration operation from flowing into the first base fluid container and the second base fluid container. Alternatively, referring to the above embodiment, it may also sequentially control by stages the hydration apparatus and the mixing control valve to open, and control the second control valve and the fourth control valve to open.

[290] Regarding the above technical content, in general, in the control method disclosed in this embodiment of the present application, the above step S1 may include:acquiring a first actual fluid level in the first base fluid container and a second actual fluid level in the second base fluid container.

[291] Correspondingly, the above step S21 may include:controlling the mixing control valve to open and controlling the hydration apparatus to work to replenish the first base fluid into the first base fluid container and the second base fluid container when at least one of the first actual fluid level and the second actual fluid level is less than the first preset value.

[292] Of course, after the hydration apparatus completes the hydration work of the first base fluid, the first base fluid may be conveyed to the first base fluid container and the second base fluid container, so that the fluid levels in the first base fluid container and the second base fluid container reach or exceed the first preset value.

[293] In addition, as described above, in another embodiment of the present application, the fluid replenishment apparatus may include a control valve, and when the fluid level in the base fluid container in the fluid supplying device in the present application is lower than the first preset value, the base fluid is replenished to the base fluid container through an external base fluid device. Based on the above technical solution, if the base fluid container includes a first base fluid container and a second base fluid container, an external base fluid device may also be used to achieve the purpose of respectively replenishing the base fluid to the first base fluid container and the second base fluid container.

[294] Correspondingly, if the first base fluid container and the second base fluid container are respectively configured for containing the first base fluid and the second base fluid, the base fluid device may be provided with the capability of conveying the first base fluid and the second base fluid, and when the actual fluid level in the first base fluid container is less than the first preset value, the fluid replenishment apparatus may be controlled to open to replenish the first base fluid to the first base fluid container. Similarly, the fluid replenishment apparatus may be controlled to open to replenish the second base fluid into the second base fluid container when the actual fluid level in the second base fluid container is less than the first preset value.

[295] Correspondingly, if the first base fluid container and the second base fluid container are both configured for containing the first base fluid, the first base fluid is replenished to the first base fluid container and the second base fluid container by controlling the opening of the fluid replenishment apparatus when the actual fluid level in at least one of the first base fluid container and the second base fluid container is less than the first preset value.

[296] A material supplying device and a material supplying control method provided in this embodiment of the present application will be described below in detail through specific embodiments and application scenarios with reference to the drawings.

[297] Please refer to FIG. 17 and FIG. 18, the material supplying device disclosed in this embodiment of the present application includes a material supplying apparatus 1100, a material mixing apparatus 1200, a sensing apparatus 1300, and an adjustment apparatus 1400. Where, the material supplying apparatus 1100 is configured for supplying a material to an inlet end of the material mixing apparatus 1200. The material in the material mixing apparatus 1200 is mixed with other substances and provided to a subsequent device. The sensing apparatus 1300 is configured for detecting a material amount in the material mixing apparatus 1200. The adjustment apparatus 1400 is configured for adjusting a material supplying amount of the material supplying apparatus 1100.

[298] Optionally, the material fed by the material supplying apparatus may be sand, the material supplying apparatus is a proppant supplying apparatus, the material mixing apparatus is a proppant mixing apparatus, and the proppant in the material mixing apparatus 1200 is mixed with other substances according to a ratio. Of course, the material supplied by the material supplying apparatus may be a material other than sand. The type of the supplied material is not limited in an embodiment of the present application.

[299] Optionally, the material supplying apparatus 1100 may be an apparatus for storing the material or an apparatus for conveying the material, as long as it can feed the material to the material mixing apparatus 1200; and the material mixing apparatus 1200 may be a material mixing hopper, and the material entering the material mixing hopper is mixed with other substances and flows out from a lower port of the material mixing hopper. Of course, the material mixing apparatus 1200 may also be any other apparatus in addition to the material mixing hopper, as long as it can contain the material and other substances.

[300] An outlet end of the material supplying apparatus 1100 is in fluid communication with an inlet end of the material mixing apparatus 1200, Optionally, The outlet end of the material supplying apparatus 1100 may be directly located above the inlet end of the material mixing apparatus 1200, so that the material flowing out of the material supplying apparatus 1100 can flow directly into the material mixing apparatus 1200. Alternatively, the outlet end of the material supplying apparatus 1100 may be in fluid communication with the inlet end of the material mixing apparatus 1200 through other apparatuses, so that the material supplied by the material supplying apparatus 1100 can flow into the material mixing apparatus 1200.

[301] The sensing apparatus 1300 is provided on the material mixing apparatus 1200 to detect the material amount in the material mixing apparatus 1200. The sensing apparatus 1300 may be a component for detecting the weight of the material mixing apparatus 1200, and feedback the material amount in the material mixing apparatus 1200 by detecting the weight of the material mixing apparatus 1200. The sensing apparatus 1300 may also be a component for detecting the material level, and feedback the material amount by detecting the material level in the material mixing apparatus 1200. Of course, the sensing apparatus 1300 may also be a detection component of other types, and indirectly feedback the material amount in the material mixing apparatus 1200 by detecting other physical quantities.

[302] The adjustment apparatus 1400 is connected to the material supplying apparatus 1100 to adjust the material supplying amount at the outlet end of the material supplying apparatus 1100. The sensing apparatus 1300 is communicatively connected to the adjustment apparatus 1400. Optionally, the outlet end of the material supplying apparatus 1100 may be located at a bottom of the material supplying apparatus 1100, the material in the material supplying apparatus 1100 flows out directly under the action of gravity, and the adjustment apparatus 1400 may adjust the opening degree of the outlet end of the material supplying apparatus 1100, thus adjusting the material supplying amount at the outlet end of the material supplying apparatus 1100; and the outlet end of the material supplying apparatus 1100 may also be located on a side part of the material supplying apparatus 1100, the material supplying apparatus 1100 is provided with a driver for driving the material to flow towards its outlet end, and the adjustment apparatus 1400 can adjust the driving speed of the driver to adjust the material supplying amount at the outlet end of the material supplying apparatus 1100. Of course, the adjustment apparatus 1400 may also adjust the material supplying amount at the outlet end of the material supplying apparatus 1100 by any other means.

[303] The adjustment apparatus 1400 adjusts the material supplying amount at the outlet end of the material supplying apparatus 1100 when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 does not reach a preset material amount range. Specifically, the preset material amount range refers to a range between a first material amount and a second material amount, the first material amount is less than the second material amount, and when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 is less than the first material amount, it indicates that the material amount in the material mixing apparatus 1200 is small, and the adjustment apparatus 1400 adjusts up the material supplying amount at the outlet end of the material supplying apparatus 1100 to increase the material amount in the material mixing apparatus 1200; and when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 is greater than the second material amount, it indicates that the material amount in the material mixing apparatus 1200 is great, and the adjustment apparatus 1400 adjusts down the material supplying amount at the outlet end of the material supplying apparatus 1100 to decrease the material amount in the material mixing apparatus 1200.

[304] The first material amount and the second material amount are respectively material amount values set by a user according to the needs.

[305] It is to be noted that in the present embodiment, the material mixing apparatus 1200 provides the material mixed with other substances to the subsequent device, so the material in the mixing apparatus will also be configured for the subsequent device while the material supplying apparatus 1100 feeds the material to it. Therefore, when the material consumption amount of the material mixing apparatus 1200 is constant, if the material supplying amount of the material supplying apparatus 1100 increases, the material amount in the material mixing apparatus 1200 will increase; and if the material supplying amount of the material supplying apparatus 1100 decreases, the material amount in the material mixing apparatus 1200 will decrease.

[306] In this embodiment of the present application, the material supplying device is provided with the sensing apparatus 1300 and the adjustment apparatus 1400, and the adjustment apparatus 1400 adjusts the material supplying amount at the outlet end of the material supplying apparatus 1100 in real time according to the material amount of the material mixing apparatus 1200 detected by the sensing apparatus 1300, so as to adjust the amount of the material entering the material mixing apparatus 1200, so that the material amount in the material mixing apparatus 1200 is within the preset material amount range, thus preventing the material amount in the material mixing apparatus 1200 from being too great or too small. In this way, the sensing apparatus 1300 and the adjustment apparatus 1400 achieve automatic control without requiring manual intervention, thus helping to ensure the adjustment accuracy, improving the adjustment efficiency, and reducing the labor cost.

[307] Optionally, referring to FIG. 17 and FIG. 18, the material supplying device further includes a control apparatus 600, the control apparatus 600 is communicatively connected to the sensing apparatus 1300 and the adjustment apparatus 1400 respectively, and the control apparatus 600 accurately controls the adjustment apparatus 1400 according to the detection information of the sensing apparatus 1300, thus achieving the automatic adjustment of the material supplying process. The control apparatus 600 may be a single-chip microcomputer, a PLC (Programmable Logic Controller), or any other controller that can achieve a communication control effect.

[308] In an optional embodiment, referring to FIG. 17 and FIG. 18, the material supplying apparatus 1100 includes a material storage apparatus 1110, the material storage apparatus 1110 may be an apparatus such as a material storage tank or a material storage silo that can directly store the material, and the structure of the material storage apparatus 1110 is not specifically limited in this embodiment of the present application; and the material storage apparatus 1110 is provided with a discharge outlet 1111, the discharge outlet 1111 may be located at the bottom or other positions of the material storage apparatus 1110, and the discharge outlet 1111 is in fluid communication with the inlet end of the material mixing apparatus 1200. In this way, the material flowing out of the discharge outlet 1111 can enter the material mixing apparatus 1200. The adjustment apparatus 1400 is connected to the material storage apparatus 1110 to adjust an opening degree of the discharge outlet 1111. Optionally, the adjustment apparatus 1400 may include a control valve, the control valve may be an electromagnetic valve, the control valve is provided at the discharge outlet 1111, the control valve is communicatively connected to the sensing apparatus 1300, and the opening degree of the discharge outlet 1111 is adjusted through the control valve. Further optionally, the control apparatus 600 is communicatively connected to the control valve and the sensing apparatus 1300 respectively.

[309] Specifically, when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 is less than the first material amount, it indicates that the material amount in the material mixing apparatus 1200 is small, the adjustment apparatus 1400 adjusts up the opening degree of the discharge outlet 1111 to increase the material discharge amount at the discharge outlet 1111, and the material amount in the material mixing apparatus 1200 within the same time increases; and when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 is greater than the second material amount, it indicates that the material amount in the material mixing apparatus 1200 is great, the adjustment apparatus 1400 adjusts down the opening degree of the discharge outlet 1111 to decrease the material discharge amount at the discharge outlet 1111, and the material amount in the material mixing apparatus 1200 within the same time decreases. The first material amount is less than the second material amount.

[310] By adopting the present embodiment, the adjustment apparatus 1400 adjusts the opening degree of the discharge outlet 1111 of the material storage apparatus 1110, so as to adjust the material supplying amount of the material supplying apparatus 1100, thus ensuring that the material amount in the material mixing apparatus 1200 remains within the preset material amount range.

[311] Optionally, the discharge outlet 1111 of the material storage apparatus 1110 is further provided with an opening sensor, and the opening sensor is configured for detecting the opening degree of the discharge outlet 1111 and displaying opening data information.

[312] In a further embodiment, the adjustment apparatus 1400 includes a valve plate 1410 and a first driver 1420, the valve plate 1410 may be movably provided at the discharge outlet 1111 to adjust the opening degree of the discharge outlet 1111, the valve plate 1410 may be a square plate, a circular plate, or other structures, the structure of the valve plate 1410 may be the same as the structure of the discharge outlet 1111, and the valve plate 1410 can close or open the discharge outlet 1111; and the first driver 1420 is connected to the valve plate 1410 to drive the valve plate 1410 to move relative to the discharge outlet 1111, and the first driver 1420 is communicatively connected to the sensing apparatus 1300. Optionally, the control apparatus 600 is communicatively connected to the first driver 1420 and the sensing apparatus 1300 respectively.

[313] Specifically, when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 is less than the first material amount, it indicates that the material amount in the material mixing apparatus 1200 is small, and the first driver 1420 drives the valve plate 1410 to move along a first direction to increase the opening degree of the discharge outlet 1111, so as to adjust up the material supplying amount at the outlet end of the material supplying apparatus 1100; and when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 is greater than the second material amount, it indicates that the material amount in the material mixing apparatus 1200 is great, and the first driver 1420 drives the valve plate 1410 to move along a second direction to decrease the opening degree of the discharge outlet 1111, so as to adjust down the material supplying amount at the outlet end of the material supplying apparatus 1100. The first direction is opposite to the second direction.

[314] Optionally, the first driver 1420 may be an air cylinder, an electric cylinder, a linear module or other drivers that can generate linear flowrate, and the first driver 1420 drives the valve plate 1410 to move relative to the discharge outlet 1111 to adjust the opening degree of the discharge outlet 1111. In this case, the first direction and the second direction are both moving directions. Alternatively, the first driver 1420 may be a motor, a pneumatic motor or other drivers that can generate rotational power, and the first driver 1420 drives the valve plate 1410 to rotate relative to the discharge outlet 1111 to adjust the opening degree of the discharge outlet 1111. In this case, the first direction and the second direction are both rotation directions.

[315] By adopting the present embodiment, the first driver 1420 controls the moving direction and moving distance of the valve plate 1410 to adjust the degree to which the valve plate 1410 opens the discharge outlet 1111, thus helping to accurately adjust the opening degree of the discharge outlet 1111 and ensuring that the material amount in the material mixing apparatus 1200 remains within the preset material amount range.

[316] In an optional embodiment, referring to FIG. 17, the material supplying apparatus 1100 further includes a material conveying apparatus 1120, an inlet end of the material conveying apparatus 1120 is in fluid communication with the discharge outlet 1111, an outlet end of the material conveying apparatus 1120 is in fluid communication with the inlet end of the material mixing apparatus 1200. In this way, the material flowing out of the discharge outlet 1111 of the material storage apparatus 1110 enters the material conveying apparatus 1120, is conveyed by the material conveying apparatus 1120, and further flows into the material mixing apparatus 1200. The adjustment apparatus 1400 is connected to the material conveying apparatus 1120 to adjust a material conveying speed of the material conveying apparatus 1120.

[317] Specifically, when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 is less than the first material amount, the material amount in the material mixing apparatus 1200 is small, the adjustment apparatus 1400 adjusts up the opening degree of the discharge outlet 1111, and the adjustment apparatus 1400 adjusts up the material conveying speed of the material conveying apparatus 1120 at the same time; and when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 is greater than the second material amount, the material amount in the material mixing apparatus 1200 is great, the adjustment apparatus 1400 adjusts down the opening degree of the discharge outlet 1111, and the adjustment apparatus 1400 adjusts down the material conveying speed of the material conveying apparatus 1120 at the same time.

[318] That is to say, the material supplying apparatus 1100 is provided with the material storage apparatus 1110 and the material conveying apparatus 1120 at the same time. When the opening degree of the discharge outlet 1111 increases, the material amount entering the material conveying apparatus 1120 from the discharge outlet 1111 increases. By increasing the material conveying speed, the material amount entering the material conveying apparatus 1120 is quickly conveyed into the material mixing apparatus 1200, and the material amount entering the material conveying apparatus 1120 within the same time increases. Similarly, when the opening degree of the discharge outlet 1111 decreases, the material amount entering the material conveying apparatus 1120 from the discharge outlet 1111 decreases. By decreasing the material conveying speed, the material amount entering the material conveying apparatus 1120 within the same time decreases. Otherwise, even if the opening degree of the discharge outlet 1111 is adjusted, the constant material conveying speed will still cause the material amount entering the material mixing apparatus 1200 to be unchanged, thus making it impossible to adjust the material amount entering the material mixing apparatus 1200.

[319] In the present embodiment, as the opening degree of the discharge outlet 1111 changes, the adjustment apparatus 1400 also makes an adaptive adjustment to the material conveying speed of the material conveying apparatus 1120, thus helping to accurately adjust the material amount entering the material mixing apparatus 1200, and ensuring that the material amount in the material mixing apparatus 1200 remains within the preset material amount range.

[320] Of course, in other embodiments, the material supplying apparatus 1100 may not be provided with the material conveying apparatus 1120, but only is provided with the material storage apparatus 1110, so that the outlet end of the material storage apparatus 1110 is directly in fluid communication with the inlet end of the material mixing apparatus 1200.

[321] In a further embodiment, the material conveying apparatus 1120 includes a second driver 1121 and a material conveyor 1122, the second driver 1121 is connected to the material conveyor 1122, the second driver 1121 may drive the material conveyor 1122 to move so that the material conveyor 1122 conveys a material, the second driver 1121 is communicatively connected to the adjustment apparatus 1400, and the adjustment apparatus 1400 may adjust a driving state of the second driver 1121 to change the moving speed of the material conveyor 1122.

[322] Optionally, the material conveying apparatus 1120 may adopt belt conveying, screw conveying or pipeline conveying. For the belt conveying and the screw conveying, the second driver 1121 may be a motor, a hydraulic motor or other drivers that provides rotational power. If the second driver 1121 is a motor, the adjustment apparatus 1400 may be a frequency converter, the frequency converter is electrically connected to the motor, and output voltage and frequency of the motor are adjusted through the frequency converter to change the output rotation speed of the motor, thus adjusting the material conveying speed of the material conveyor 1122. If the second driver 1121 is a hydraulic motor, the adjustment apparatus 1400 may be a flow rate control valve or a speed regulator, and the output rotation speed of the hydraulic motor is adjusted through the flow rate control valve or the speed regulator, thus adjusting the material conveying speed of the material conveyor 1122. For pipeline conveying, it is necessary to rely on air blowing to achieve the conveying process. Therefore, the second driver 1121 is a fan or other components that can provide air, the adjustment apparatus 1400 may also be the frequency converter, and the output rotation speed of the fan is adjusted through the frequency converter to adjust the magnitude of air force, thus adjusting the material conveying speed of the material conveyor 1122.

[323] Specifically, when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 is less than the first material amount, it indicates that the material amount in the material mixing apparatus 1200 is small, the adjustment apparatus 1400 adjusts the second driver 1121 to increase the moving speed of the material conveyor 1122 driven by the second driver 1121, thus increasing the material conveying speed; and when the material amount in the material mixing apparatus 1200 detected by the sensing apparatus 1300 is greater than the second material amount, it indicates that the material amount in the material mixing apparatus 1200 is great, the adjustment apparatus 1400 adjusts the second driver 1121 to decrease the moving speed of the material conveyor 1122 driven by the second driver 1121, thus decreasing the material conveying speed.

[324] By adopting the present embodiment, while adjusting the opening degree of the discharge outlet 1111, the adjustment apparatus 1400 directly adjusts the moving speed of the second driver 1121 to adjust the material conveying speed, thus helping to accurately adjust the material conveying speed, accurately adjusting the material amount entering the material mixing apparatus 1200, and ensuring that the material amount in the material mixing apparatus 1200 remains within the preset material amount range.

[325] In an optional embodiment, the material supplying device further includes a flow rate detection element 1510, the flow rate detection element 1510 is provided on the material conveying apparatus 1120, the flow rate detection element 1510 is configured for detecting the flow rate of the material conveying apparatus 1120, that is, the material conveying speed of the material conveying apparatus 1120, and the flow rate detection element 1510 may be, but not limited to, a flow rate sensor; and the flow rate detection element 1510 is communicatively connected to the adjustment apparatus 1400. Optionally, the control apparatus 600 is communicatively connected to the flow rate detection element 1510 and the adjustment apparatus 1400 respectively. In this way, the control apparatus 600 can control the adjustment apparatus 1400 to adjust the material conveying speed according to a flow rate value detected by the flow rate detection element 1510.

[326] When the flow rate detection element 1510 detects that the flow rate of the material conveying apparatus 1120 does not reach a preset flow rate range, it indicates that the flow rate is large or small, and the adjustment apparatus 1400 adjusts the material conveying speed of the material conveying apparatus 1120 until the flow rate of the conveyed material is within the preset flow rate range. Specifically, the preset flow rate range refers to a range between a first flow rate and a second flow rate, the first flow rate is less than the second flow rate, and when the flow rate detection element 1510 detects that the flow rate of the material conveying apparatus 1120 is less than the first flow rate, it indicates that the material conveying speed of the material conveying apparatus 1120 is small, and the adjustment apparatus 1400 adjusts up the material conveying speed of the material conveying apparatus 1120 to increase the flow rate of the material conveying apparatus 1120; and when the flow rate detection element 1510 detects that the flow rate of the material conveying apparatus 1120 is greater than the second flow rate, it indicates that the material conveying speed of the material conveying apparatus 1120 is large, and the adjustment apparatus 1400 adjusts down the material conveying speed of the material conveying apparatus 1120 to decrease the flow rate of the material conveying apparatus 1120.

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

[328] By adopting the present embodiment, the adjustment apparatus 1400 adjusts the material conveying speed according to the flow rate value of the material conveying apparatus 1120 detected by the flow rate detection element 1510, so as to ensure that the material conveying speed of the material conveying apparatus 1120 is within an appropriate range, and prevent the material conveying speed form being too large or too small.

[329] Of course, in other embodiments, the material supplying device may not be provided with the flow rate detection element 1510, and the second driver 1121 is directly adjusted by using the adjustment apparatus 1400 to ensure that the material conveying speed of the material conveying apparatus 1120 is within an appropriate range.

[330] In the solution of the present application, the material supplying device further includes a second material level detection element 1520, and the second material level detection element 1520 is provided on the material storage apparatus 1110 to detect the material level in the material storage apparatus 1110. Optionally, the second material level detection element 1520 may include at least one of a range 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 the material level may also be adopted. Optionally, the range 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 provided at a top of the material storage apparatus 1110, and all sensors are spaced apart in a circumferential direction of the material storage apparatus 1110. In this way, the material levels at different positions in the material storage apparatus 1110 can be respectively detected through the multiple sensors, thus helping to accurately detect the material level in the material storage apparatus 1110.

[331] By adopting such arrangement, the material amount in the material storage apparatus 1110 can be known in time through the second material level detection element 1520, the material can be added in time when the storage amount of the material storage apparatus 1110 is small, and the material is stopped from being added when the storage amount of the material storage apparatus is great.

[332] Optionally, the material supplying device further includes a material level switch 1560, the material level switch 1560 may be a rotary paddle material level switch, a capacitive material level switch, a radio frequency admittance material level switch. or the like. The bottom, middle, and top of the material storage apparatus 1110 are all provided with material level switches 1560. When the material level in the material storage apparatus 1110 reaches the corresponding position of the material level switch 1560, the material level switch 1560 displays an alarm to prevent the material level in the material storage apparatus 1110 from being too high or too low. In addition, as shown in FIG. 18, the top of the material mixing apparatus 1200 is also provided with a material level switch 1560. When the material level in the material mixing apparatus 1200 reaches the corresponding position of the material level switch 1560, the material level switch 1560 also displays an alarm to prevent the material level in the material mixing apparatus 1200 from being too high.

[333] In an optional embodiment, referring to FIG. 17 and FIG. 18, the material supplying device further includes a second weighing sensor 1530, the second weighing sensor 1530 is provided at the bottom of the material storage apparatus 1110 to detect the weight of the material storage apparatus 1110. In this way, the material amount in the material storage apparatus 1110 can be fed back through the weight change detected by the second weighing sensor 1530.

[334] In an optional embodiment, referring to FIG. 17, the material supplying device further includes a humidity detection element 1540, the humidity detection element 1540 may be, but not limited to, a humidity sensor, and the humidity detection element 1540 is provided on the material mixing apparatus 1200 to detect the humidity of the material in the material mixing apparatus 1200. Specifically, a detection end of the humidity detection element 1540 stretches into the material mixing apparatus 1200. By adopting the present embodiment, the humidity detection element 1540 can accurately detect the humidity of the material is the material mixing apparatus 1200, so as to adjust the storage conditions in time when the humidity is small or large, and prevent the material from being too wet or too dry.

[335] In an optional embodiment, referring to FIG. 17, the material supplying device further includes a camera apparatus 1550, the camera apparatus 1550 is provided on the material mixing apparatus 1200 to detect the state of the material in the material mixing apparatus 1200, and the camera apparatus 1550 may capture an image of the material in the material mixing apparatus 1200, so that the state of the material in the material mixing apparatus 1200 can be conveniently monitored in real time, for example, the cleanness of the material can be monitored.

[336] In an optional embodiment, the sensing apparatus 1300 includes a first material level detection element 1310, the first material level detection element 1310 is provided on the material mixing apparatus 1200 to detect the material level in the material mixing apparatus 1200, the material amount in the material mixing apparatus 1200 is fed back through the detected material level, and the first material level detection element 1310 is communicatively connected to the adjustment apparatus 1400. Optionally, the control apparatus 600 is communicatively connected to the first material level detection element 1310 and the adjustment apparatus 1400 respectively. Where the first material level detection element 1310 may be a range sensor, a guided wave radar material level sensor, a radar material level sensor, or an ultrasonic material level sensor, and may also be other sensors capable of detecting the material level.

[337] Specifically, when the material level in the material mixing apparatus 1200 detected by the first material level detection element 1310 is lower than the first material level, it indicates that the material amount in the material mixing apparatus 1200 is small, and the adjustment apparatus 1400 adjusts up the material supplying amount at the outlet end of the material supplying apparatus 1100 to increase the material amount in the material mixing apparatus 1200; and when the material level in the material mixing apparatus 1200 detected by the first material level detection element 1310 is higher than the second material level, it indicates that the material amount in the material mixing apparatus 1200 is great, and the adjustment apparatus 1400 adjusts down the material supplying amount at the outlet end of the material supplying apparatus 1100 to decrease the material amount in the material mixing apparatus 1200. The first material level is less than the second material level, the first material level and the second material level are respectively material levels set by a user according to the needs.

[338] Optionally, the first material level is a corresponding material level when the material amount in the material mixing apparatus 1200 reaches the first material amount described above, and the second material level is a corresponding material level when the material amount in the material mixing apparatus 1200 reaches the second material amount described above.

[339] By adopting the present embodiment, the sensing apparatus 1300 feeds back the material amount by detecting the material level in the material mixing apparatus 1200, so that the adjustment apparatus 1400 can adjust the material supplying amount of the material supplying apparatus 1100 accordingly, thus ensuring that the material amount in the material mixing apparatus 1200 remains within the preset material amount range.

[340] In another embodiment, the sensing apparatus 1300 includes a first weighing sensor 1320, the first weighing sensor 1320 is provided at the bottom of the material mixing apparatus 1200 to detect the weight of the material mixing apparatus 1200, the material amount in the material mixing apparatus 1200 is fed back through the detected weight, and the first weighing sensor 1320 is communicatively connected to the adjustment apparatus 1400. Optionally, the control apparatus 600 is communicatively connected to the first weighing sensor 1320 and the adjustment apparatus 1400 respectively.

[341] Specifically, when the weight of the material mixing apparatus 1200 detected by the first weighing sensor 1320 is less than a first weight, it indicates that the material amount in the material mixing apparatus 1200 is small, and the adjustment apparatus 1400 adjusts up the material supplying amount at the outlet end of the material supplying apparatus 1100 to increase the material amount in the material mixing apparatus 1200; and when the weight of the material mixing apparatus 1200 detected by the first weighing sensor 1320 is greater than a second weight, it indicates that the material amount in the material mixing apparatus 1200 is great, and the adjustment apparatus 1400 adjusts down the material supplying amount at the outlet end of the material supplying apparatus 1100 to decrease the material amount in the material mixing apparatus 1200. The first weight is less than the second weight, the first weight and the second weight are respectively weights set by a user according to the needs.

[342] Optionally, the first weight is a corresponding weight when the material amount in the material mixing apparatus 1200 reaches the first material amount described above, and the second weight is a corresponding weight when the material amount in the material mixing apparatus 1200 reaches the second material amount described above.

[343] By adopting the present embodiment, the sensing apparatus 1300 feeds back the material amount by detecting the weight of the material mixing apparatus 1200, so that the adjustment apparatus 1400 can adjust the material supplying amount of the material supplying apparatus 1100 accordingly, thus ensuring that the material amount in the material mixing apparatus 1200 remains within the preset material amount range.

[344] Based on the material supplying device disclosed in the present application, an embodiment of the present application further discloses a material supplying control method. Referring to FIG. 19, the material supplying control method includes the following steps:S100, a material amount in a material mixing apparatus 1200 is detected.

[345] Optionally, the material level in the material mixing apparatus 1200 may be detected through the first material level detection element 1310, or the weight of the material mixing apparatus 1200 may be detected through the first weighing sensor, thus indirectly supplying back the material amount in the material mixing apparatus 1200. Of course, the material amount in the material mixing apparatus 1200 may also be indirectly fed back by detecting other physical quantities of the material in the material mixing apparatus 1200.

[346] S200, an adjustment apparatus 1400 is controlled to adjust up a material supplying amount at an outlet end of a material supplying apparatus 1100 when the material amount in the material mixing apparatus 1200 is less than a first material amount.

[347] S300, the adjustment apparatus 1400 is controlled to adjust down the material supplying amount at the outlet end of the material supplying apparatus 1100 when the material amount in the material mixing apparatus 1200 is greater than a second material amount.

[348] The first material amount is less than the second material amount.

[349] In this embodiment that the material level in the material mixing apparatus 1200 is detected through the first material level detection element 1310, the case that the material level in the material mixing apparatus 1200 is lower than the first material level represents the case that the material amount in the material mixing apparatus 1200 is less than the first material amount, and the case that the material level in the material mixing apparatus 1200 is higher than the second material level represents the case that the material amount in the material mixing apparatus 1200 is greater than the second material amount. Alternatively, in an embodiment that the weight of the material mixing apparatus 1200 is detected through the first weighing sensor 1320, the case that the weight of the material mixing apparatus 1200 is less than the first weight represents the case that the material amount in the material mixing apparatus 1200 is less than the first material amount, and the case that the weight of the material mixing apparatus 1200 is greater than the second weight represents the case that the material amount in the material mixing apparatus 1200 is greater than the second material amount.

[350] Optionally, when the material amount in the material mixing apparatus 1200 is less than the first material amount, the adjustment apparatus 1400 is controlled to adjust up the opening degree of the discharge outlet 1111 of the material storage apparatus 1110, and the adjustment apparatus 1400 is controlled to adjust up the material conveying speed of the material conveying apparatus 1120; and when the material amount in the material mixing apparatus 1200 is greater than the second material amount, the adjustment apparatus 1400 is controlled to adjust down the opening degree of the discharge outlet 1111 of the material storage apparatus 1110, and the adjustment apparatus 1400 is controlled to adjust down the material conveying speed of the material conveying apparatus 1120.

[351] According to this material supplying control method, the adjustment apparatus 1400 can adjust the material supplying amount at the outlet end of the material supplying apparatus 1100 in time according to the material amount in the material mixing apparatus 1200, so that the material amount in the material mixing apparatus 1200 is within the preset material amount range, thus achieving an automatic adjustment process without requiring manual intervention, helping to ensure the adjustment accuracy, improving the adjustment efficiency, and reducing the labor cost.

[352] It should be noted that the terms "include", "comprise", or any other variations thereof herein are intended to cover a non-exclusive inclusion, so that a process, method, object or apparatus that includes a series of elements not only includes these elements, but also includes other elements that are not explicitly listed or are inherent to such a process, method, object or apparatus. Without further limitations, the element limited by the statement "including a..." does not preclude the presence of another identical element in a process, method, object or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and apparatuses in the implementations of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in the opposite order according to the involved functions. For example, the described methods may be executed in a different order from the described ones, and various steps may also be added, omitted or combined. In addition, features described with reference to certain examples may be combined in other examples.

[353] Through the description of the above implementations, a person skilled in the art can clearly understand that the above described embodiments may be implemented through software and necessary general-purpose hardware platforms. Of course, these embodiments may also be implemented through hardware. However, in many cases, the former is a better implementation. Based on this understanding, fundamental technical features solution of the present application, or the part that contributes over the prior art, may be implemented in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disc or optical disc), including any number of instructions to enable a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute a described method according to respective embodiments of the present application.

[354] Embodiments of the present application have been described above with reference to the drawings. However, the present application is not limited to the specific implementations described above. The specific implementations described above are only illustrative rather than restrictive. Inspired by the present disclosure, a person of ordinary skill in the art may make many variations without departing from the essence and the protection scope of the present application, which, however, still fall within the protection scope of the present application.ABSTRACTA control method for a fracturing system, a fracturing system, a safety control method for a fracturing operation, a target device, a fracturing operation control system, a fracturing fluid supplying device and a control method therefor, a material supplying device, and a material supplying control method, and belongs to the field of oilfield equipment. The control method for the fracturing system includes: detecting an actual pressure value of a fracturing fluid with proppant at a wellhead; controlling a flowrate of the fracturing fluid with proppant to remain unchanged when the actual pressure value does not exceed a preset pressure value; and controlling to decrease the flowrate of the fracturing fluid with proppant when the actual pressure value exceeds the preset pressure value, so that the actual pressure value returns to below the preset pressure value. 

Claims

1. A control method for a fracturing system, wherein the control method comprises:detecting an actual pressure value of a fracturing fluid with proppant at a wellhead;controlling to maintain a flowrate of the fracturing fluid with the proppant unchanged when the actual pressure value does not exceed a preset pressure value; andcontrolling to decrease the flowrate of the fracturing fluid with the proppant when the actual pressure value exceeds the preset pressure value, so that the actual pressure value returns to below the preset pressure value.  2. The control method according to claim 1, wherein controlling to decrease the flowrate of the fracturing fluid with proppant comprises controlling to decrease the flowrate of the fracturing fluid with proppant by a first amplitude when the actual pressure value exceeds the preset pressure value and does not exceed a first pressure protection value, wherein the first pressure protection value is greater than the preset pressure value.  3. The control method according to claim 2, wherein controlling to decrease the flowrate of the fracturing fluid with proppant comprises controlling to decrease the flowrate of the fracturing fluid with proppant by a second amplitude when the actual pressure value exceeds the first pressure protection value and does not exceed an upper limit pressure protection value, wherein the upper limit pressure protection value is greater than the first pressure protection value; orthe control method further comprising controlling to stop supplying of the fracturing fluid with proppant when the actual pressure value exceeds an upper limit pressure protection value, wherein the upper limit pressure protection value is greater than the first pressure protection value.  4. The control method according to any one of claims 1 to 3, wherein the controlling to decrease the flowrate of the fracturing fluid with proppant comprises: controlling to decrease the flowrate by an absolute value or a percentage of the flowrate; orthe controlling to decrease the flowrate of the fracturing fluid with proppant comprises: controlling to decrease a supplying amount of the fracturing fluid and a fracturing proppant amount supplied to the fracturing fluid.  5. The control method according to claim 1, wherein the control method further comprises: controlling to maintain a fracturing proppant amount supplied to the fracturing fluid unchanged when the actual pressure value does not exceed the preset pressure value; andcontrolling to decrease the fracturing proppant amount supplied to the fracturing fluid when the actual pressure value exceeds the preset pressure value;wherein the fracturing proppant amount supplied to the fracturing fluid is decreased by a third amplitude when the actual pressure value exceeds the preset pressure value and does not exceed a first pressure protection value, wherein the first pressure protection value is greater than the preset pressure value.  6. The control method according to claim 5, further comprising controlling to decrease the fracturing proppant amount supplied to the fracturing fluid by a fourth amplitude when the actual pressure value exceeds the first pressure protection value and does not exceed an upper limit pressure protection value, wherein the upper limit pressure protection value is greater than the first pressure protection value; orfurther comprising controlling to stop supplying the fracturing proppant to the fracturing fluid when the actual pressure value exceeds an upper limit pressure protection value, wherein the upper limit pressure protection value is greater than the first pressure protection value.  7. The control method according to claim 5 or 6, wherein the controlling to decrease the fracturing proppant amount supplied to the fracturing fluid comprises:controlling to decrease a fracturing proppant ratio or a concentration value of the fracturing proppant.  8. A fracturing system adopting the control method according to any one of claims 1 to 7, wherein the fracturing system comprises: a fracturing device (200), a proppant blending device (100), a high-pressure manifold (1910), a control center (600), and a pressure detection element (710), whereinan inlet of the fracturing device (200) is in fluid communication with an outlet of the proppant blending device (100), an outlet of the fracturing device (200) is in fluid communication the high-pressure manifold (1910), and the high-pressure manifold (1910) is configured for outputting the fracturing fluid with proppant;the pressure detection element (710) is provided on the high-pressure manifold (1910); andthe control center (600) is electrically connected to the fracturing device (200), the proppant blending device (100), and the pressure detection element (710) respectively.  9. The fracturing system according to claim 8, wherein the fracturing system further comprises a hydration device (300) and a proppant conveying device (400);an outlet of the hydration device (300) is in fluid communication with an inlet of the proppant blending device (100), and is configured for conveying the fracturing fluid to the proppant blending device (100); andan outlet of the proppant conveying device (400) is in fluid communication with the inlet of the proppant blending device (100), and is configured for conveying the fracturing proppant to the proppant blending device (100).  10. The fracturing system according to claim 9, wherein the fracturing system further comprises a low-pressure manifold (1920), the hydration device (300) and the proppant conveying device (400) are both in fluid communication with an inlet of the low-pressure manifold (1920), an outlet of the low-pressure manifold (1920) is in communication with the fracturing device (200), and the proppant blending device (100) is connected to the low-pressure manifold (1920); and the fracturing system further comprises a flow rate detection element (720), and the flow rate detection element (720) is connected to the low-pressure manifold (1920) and located upstream of the proppant blending device (100); the fracturing system further comprises a fluid level detection element (730), and the fluid level detection element (730) is connected to the proppant blending device (100);and / or, the fracturing system further comprises a first valve body (1810), and the first valve body (1810) is connected to the high-pressure manifold (1910) and provided adjacent to the outlet of the fracturing device (200);and / or, the fracturing device (200) further comprises a second valve body (1820) and a low-pressure manifold (1920), and the second valve body (1820) is connected to the low-pressure manifold (920) and provided adjacent to the inlet of the fracturing device (200);and / or, the fracturing device (200) further comprises a third valve body (830) and the low-pressure manifold (1920), and the third valve body (830) is connected to the low-pressure manifold (1920) and provided adjacent to the outlet of the hydration device (300). 

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