Drilling fluid volume monitoring device

Abstract

The embodiment of the utility model discloses a drilling fluid volume monitoring device. The drilling fluid volume monitoring device comprises a pull rope displacement sensor, a signal acquisition box, a control computer, an LED display screen and a power supply unit, wherein the pull rope displacement sensor is arranged at the top end of a floating ball scale on a drilling fluid pool and is used for detecting the moving distance of a pointer of the floating ball scale; the signal acquisition box is mounted on a guardrail on the edge of the drilling fluid pool, is connected with the pull rope displacement sensor and is used for acquiring a signal of the pull rope displacement sensor; the control computer is connected with the signal acquisition box and is used for carrying out data processing on the detection signals acquired by the signal acquisition box; the LED display screen is mounted in a drilling fluid pool area, is connected with the control computer and is used for acquiring data processed by the control computer and displaying the data; and the power supply unit is used for providing a working power supply for the signal acquisition box, the control computer and the LED display screen. According to the technical scheme, the drilling fluid volume monitoring precision, efficiency and real-time performance can be improved, and well control safety can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling, in particular to a drilling fluid volume monitoring device. Background Art

[0002] Currently, oil and gas exploration and development are vigorously advancing into fields such as ultra-deep, unconventional, and deep-sea natural gas hydrates, and the risks and challenges faced by drilling well control are becoming increasingly severe. At present, during the oil drilling process, the monitoring of the drilling fluid volume is mainly completed by drillers through manual reading and calculation.

[0003] Drillers rely on the float scale technology installed on the drilling fluid tank, but each time they can only read the drilling fluid volume data in one drilling fluid tank. If you want to obtain the total volume of the drilling fluid, you need to inspect and read the drilling fluid volume of each tank in turn, and it is impossible to grasp the total volume parameter in real time, resulting in poor real-time performance.

[0004] Due to the large workload of manual sitting on duty records and the manual reading of monitoring data, there are defects such as low accuracy, low efficiency, and poor real-time performance, and it is impossible to monitor the drilling fluid volume in a timely manner, making it impossible to effectively guarantee well control safety. Summary of the Utility Model

[0005] The utility model provides a drilling fluid volume monitoring device, which can automatically detect the drilling fluid volume through a rope displacement sensor installed at the top of the float scale, and perform real-time and intuitive display through an LED display screen installed in the drilling fluid tank area, thereby improving the accuracy, efficiency, and real-time performance of drilling fluid volume monitoring, and helping to ensure well control safety.

[0006] According to one aspect of the utility model, a drilling fluid volume monitoring device is provided, including a rope displacement sensor, a signal acquisition box, a control computer, an LED display screen, and a power supply unit; wherein:

[0007] The rope displacement sensor is installed at the top of the float scale on the drilling fluid tank and is used to detect the moving distance of the pointer of the float scale;

[0008] The signal acquisition box is installed on the guardrail at the edge of the drilling fluid tank and is connected to the rope displacement sensor for collecting the signals of the rope displacement sensor;

[0009] The control computer is connected to the signal acquisition box and is used to process the detection signals collected by the signal acquisition box;

[0010] The LED display screen is installed in the drilling fluid tank area and is connected to the control computer for obtaining the data processed by the control computer and displaying it;

[0011] The power supply unit is used to provide working power for the signal acquisition box, the control computer, and the LED display screen.

[0012] Optionally, the device further includes a working condition detection sensor, which is installed on the drilling equipment and used to detect the operating state of the drilling equipment; the signal acquisition box is connected to the working condition detection sensor and used to collect the signals of the working condition detection sensor.

[0013] Optionally, the working condition detection sensors include: a drawworks sensor, a hook load sensor, a pump stroke sensor, a standpipe pressure sensor, and a rotary table speed sensor.

[0014] Optionally, the device further includes an audible and visual alarm, which is connected to the LED display screen and used to perform abnormal alarm based on the data processed by the control computer; the power supply unit is also used to provide working power for the audible and visual alarm.

[0015] Optionally, the device further includes a display, which is connected to the control computer and installed together in the sitting post room or the driller's cabin, and is used to display the data processed by the control computer.

[0016] Optionally, the rope displacement sensor and the working condition detection sensors adopt wired sensors.

[0017] Optionally, the rope displacement sensor and the working condition detection sensors adopt wireless sensors.

[0018] The technical solution of the embodiment of the present invention provides a drilling fluid volume monitoring device, which includes a rope displacement sensor, a signal acquisition box, a control computer, an LED display screen, and a power supply unit; wherein: the rope displacement sensor is installed at the top of the float scale on the drilling fluid tank and is used to detect the moving distance of the pointer of the float scale; the signal acquisition box is installed on the guardrail on the edge of the drilling fluid tank and is connected to the rope displacement sensor and is used to collect the signals of the rope displacement sensor; the control computer is connected to the signal acquisition box and is used to process the detection signals collected by the signal acquisition box; the LED display screen is installed in the drilling fluid tank area and is connected to the control computer and is used to obtain and display the data processed by the control computer; the power supply unit is used to provide working power for the signal acquisition box, the control computer, and the LED display screen. This technical solution can automatically detect the drilling fluid volume through the rope displacement sensor installed at the top of the float scale and perform real-time and intuitive display through the LED display screen installed in the drilling fluid tank area, thereby improving the accuracy, efficiency, and real-time performance of the drilling fluid volume monitoring and helping to ensure well control safety.

[0019] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present utility model, nor is it used to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of a drilling fluid volume monitoring device provided according to Embodiment 1 of the present utility model;

[0022] Figure 2 is a schematic structural diagram of another drilling fluid volume monitoring device provided according to Embodiment 2 of the present utility model;

[0023] Figure 3A is a schematic structural diagram of yet another drilling fluid volume monitoring device provided according to Embodiment 2 of the present utility model;

[0024] Figure 3B is a schematic structural diagram of yet another drilling fluid volume monitoring device provided according to Embodiment 2 of the present utility model;

[0025] Figure 3C is a schematic structural diagram of yet another drilling fluid volume monitoring device provided according to Embodiment 2 of the present utility model;

[0026] Figure 4 is a schematic structural diagram of yet another drilling fluid volume monitoring device provided according to Embodiment 3 of the present utility model.

[0027] Reference numerals:

[0028] 1, pull rope displacement sensor; 2, signal acquisition box; 3, control computer; 4, LED display screen; 5, power supply unit; 6, working condition detection sensor; 7, sound and light alarm; 8, display. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] It should be noted that the terms "first", "second", "target", etc. in the description and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances so that the embodiments of the present utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0031] Embodiment 1

[0032] Figure 1 It is a structural schematic diagram of a drilling fluid volume monitoring device provided in Embodiment 1 of the present utility model. This embodiment is applicable to the situation of automatically monitoring the volume of drilling fluid.

[0033] As Figure 1 shown, the device includes: a cable displacement sensor 1, a signal acquisition box 2, a control computer 3, an LED display screen 4, and a power supply unit 5; among them: the cable displacement sensor 1 is installed at the top of the float scale on the drilling fluid tank, and is used to detect the pointer movement distance of the float scale; the signal acquisition box 2 is installed on the guardrail at the edge of the drilling fluid tank and is connected to the cable displacement sensor 1, and is used to collect the signal of the cable displacement sensor 1; the control computer 3 is connected to the signal acquisition box 2, and is used to perform data processing on the detection signals collected by the signal acquisition box 2; the LED display screen 4 is installed in the area of the drilling fluid tank and is connected to the control computer 3, and is used to obtain the data processed by the control computer 3 and display it; the power supply unit 5 is used to provide working power for the signal acquisition box 2, the control computer 3, and the LED display screen 4.

[0034] Among them, the control computer 3 can be connected to the signal acquisition box 2 through a network cable or a data bus (such as an RS485 bus). The control computer 3 has relevant software for data processing and calculation inside, can obtain the detection signal of the cable displacement sensor 1 and convert it into a physical quantity, and calculates information such as the volume of drilling fluid in each drilling fluid tank and its change amount, and the total volume of drilling fluid and its change amount through data processing. The LED display screen 4 can be connected to the control computer 3 through a data bus.

[0035] Among them, the control computer 3 can be used to: determine the drilling fluid volume in each drilling fluid tank at each detection moment and the change amount of the drilling fluid volume between adjacent detection moments according to the pointer movement distance of the float scale at different detection moments; determine the total drilling fluid volume at each detection moment and the change amount of the total drilling fluid volume between adjacent detection moments according to the drilling fluid volume in each drilling fluid tank at each detection moment.

[0036] Specifically, the pointer movement distance of the float scale at different detection moments can be detected by the rope displacement sensor 1 at the top of the float scale installed on the drilling fluid tank, and then the drilling fluid volume in each drilling fluid tank at each detection moment can be determined according to the pointer movement distance of the float scale at different detection moments and the volume of the drilling fluid tank. Furthermore, for each drilling fluid tank, by subtracting the drilling fluid volume in the drilling fluid tank at the previous detection moment from the drilling fluid volume in the drilling fluid tank at the subsequent detection moment among adjacent detection moments, the change amount of the drilling fluid volume in each drilling fluid tank between adjacent detection moments can be obtained.

[0037] Furthermore, for each detection moment, by summing up the drilling fluid volumes in each drilling fluid tank, the total drilling fluid volume at each detection moment can be obtained. Then, by subtracting the total drilling fluid volume in the drilling fluid tanks at the previous detection moment from the total drilling fluid volume in the drilling fluid tanks at the subsequent detection moment among adjacent detection moments, the change amount of the total drilling fluid volume between adjacent detection moments can be obtained.

[0038] The technical solution of the embodiment of the utility model provides a drilling fluid volume monitoring device, including a pull-rope displacement sensor, a signal acquisition box, a control computer, an LED display screen and a power supply unit; wherein: the pull-rope displacement sensor is installed at the top of the float scale on the drilling fluid pool, and is used to detect the moving distance of the pointer of the float scale; the signal acquisition box is installed on the guardrail at the edge of the drilling fluid pool, and is connected to the pull-rope displacement sensor, and is used to collect the signal of the pull-rope displacement sensor; the control computer is connected to the signal acquisition box, and is used to process the detection signal collected by the signal acquisition box; the LED display screen is installed in the drilling fluid pool area, and is connected to the control computer, and is used to obtain and display the data processed by the control computer; the power supply unit is used to provide working power for the signal acquisition box, the control computer and the LED display screen. This technical solution can automatically detect the drilling fluid volume through the pull-rope displacement sensor installed at the top of the float scale, and display it in real time and intuitively through the LED display screen installed in the drilling fluid pool area, thereby improving the accuracy, efficiency and real-time performance of drilling fluid volume monitoring, and helping to ensure well control safety. The device is suitable for installation by all drilling teams. Only simple sensor technology transformation of the existing float scale is required to realize the digitization and Internet of Things of the drilling float scale, providing a better experience and effect for on-the-job work, improving the direct readability and traceability of drilling fluid volume data, and enhancing the level of drilling well control management.

[0039] Embodiment 2

[0040] Figure 2 This is a schematic diagram of the structure of another drilling fluid volume monitoring device provided in Embodiment 2 of the present utility model. This embodiment is optimized based on the above embodiment.

[0041] like Figure 2 As shown, the device also includes a working condition detection sensor 6 and an audible and visual alarm 7; wherein the working condition detection sensor 6 is installed on the drilling equipment and is used to detect the operating status of the drilling equipment; the signal acquisition box 2 is connected to the working condition detection sensor 6 and is used to collect the signal of the working condition detection sensor 6; the audible and visual alarm 7 is connected to the LED display screen 4 and is used to make an abnormal alarm based on the data processed by the control computer 3; the power supply unit 5 is also used to provide working power for the audible and visual alarm 7.

[0042] The sound and light alarm 7 is installed beside the LED display screen 4 and can be connected to the relay installed inside the LED display screen 4 through a signal line. When the control computer 3 detects that the processed data is abnormal, it can send an abnormal alarm signal to the LED display screen 4, so that the abnormal data on the LED display screen 4 is displayed in a bright color (such as red), and at the same time triggers the relay inside the LED display screen 4 to close, thereby causing the sound and light alarm 7 to sound an alarm.

[0043] In this embodiment, optionally, the working condition detection sensor 6 includes: a drawworks sensor, a hook load sensor, a pump stroke sensor, a riser pressure sensor, and a rotary table speed sensor. It should be noted that in this embodiment, it is not limited that the working condition detection sensor 6 only includes the above sensors, and other types of sensors that can be used for detecting the operating state of the drilling equipment can also be included, and can be specifically set flexibly according to the actual detection requirements.

[0044] In this embodiment, optionally, the wire rope displacement sensor 1 and the working condition detection sensor 6 adopt wired sensors. Among them, wired sensors need to be pre-wired, but once the wiring is completed, no other operations are required during subsequent use.

[0045] In this embodiment, optionally, the wire rope displacement sensor 1 and the working condition detection sensor 6 adopt wireless sensors. Among them, wireless sensors do not require time-consuming wiring, avoiding the trouble of wiring, but the battery needs to be replaced regularly to provide working power for the wireless sensors. Exemplarily, wireless transmission methods such as zigbee or lora can be selected.

[0046] In this embodiment, optionally, the control computer 3 is further configured to: determine the current drilling working condition according to the current operating state of the drilling equipment; wherein, the drilling working condition is one of drilling, making a connection, running in or pulling out of the hole.

[0047] Among them, the current operating state may refer to the operating state of the drilling equipment at the current detection moment. The current drilling working condition may refer to the drilling working condition at the current detection moment. In this embodiment, different types of working condition detection sensors 6 need to be pre-installed on the corresponding drilling equipment, the operating state of the corresponding drilling equipment is detected by various types of working condition detection sensors 6, and the operating state of the drilling equipment is transmitted to the control computer 3 through the signal acquisition box 2. The control computer 3 can judge the drilling working condition by combining the operating states of the drilling equipment detected by various types of working condition detection sensors 6.

[0048] In this embodiment, optionally, the control computer 3 is further configured to: if the current drilling working condition is drilling and the change amount of the total volume of the drilling fluid at adjacent detection moments is not within the first interval, control the sound and light alarm 7 to give an abnormal alarm.

[0049] In this embodiment, the control computer 3 can also preset alarm thresholds for different drilling conditions. Among them, the first interval can refer to the normal interval range of the total volume change of the drilling fluid preset in advance, and the two end values of the first interval are usually set as opposite numbers. Specifically, if the control computer 3 determines that the current drilling condition is drilling and the total volume change of the drilling fluid at adjacent detection times is not within the first interval, it indicates that the total volume change of the drilling fluid is abnormal. At this time, the control computer 3 can send an abnormal alarm signal to the LED display screen 4 to trigger the relay in the LED display screen 4 to close to control the sound and light alarm 7 to give an abnormal alarm.

[0050] Furthermore, a normal interval range of the volume change of the drilling fluid can be preset for each drilling fluid tank in advance. If it is detected that the volume change of the drilling fluid in a certain drilling fluid tank is not within its corresponding normal interval range, it indicates that the volume change of the drilling fluid in this drilling fluid tank is abnormal. At this time, the sound and light alarm 7 can be controlled to give an abnormal alarm.

[0051] In this embodiment, optionally, the control computer 3 is further configured to: if the current drilling condition is making a connection or adding a stand, obtain the drilling fluid return flow rate; if the drilling fluid return flow rate is not within the second interval, control the sound and light alarm 7 to give an abnormal alarm.

[0052] It should be noted that during making a connection or adding a stand, due to the reasons of starting and stopping the pump, the total volume change of the drilling fluid will change. Specifically, starting the pump will cause the total volume change of the drilling fluid to decrease, and stopping the pump will cause the total volume change of the drilling fluid to increase. In this case, it is also possible that the total volume change of the drilling fluid is not within the first interval. If an alarm is directly issued at this time, it will cause false alarms. Therefore, in order to avoid false alarms caused by starting and stopping the pump during the making a connection or adding a stand condition, making a connection or adding a stand is judged as a special condition in this embodiment.

[0053] Among them, the second interval can refer to the normal interval range of the drilling fluid return flow rate preset in advance, and the two end values of the second interval are usually set as opposite numbers. Specifically, if the control computer 3 determines that the current drilling condition is making a connection or adding a stand, first obtain the drilling fluid return flow rate caused by the reasons of starting and stopping the pump. If the drilling fluid return flow rate is not within the second interval, it indicates that the drilling fluid return flow rate is abnormal. At this time, the sound and light alarm 7 can be controlled to give an abnormal alarm.

[0054] In this embodiment, optionally, the control computer 3 is further configured to: if the current drilling condition is pulling out the drill string, determine the theoretical amount of drilling fluid to be injected according to the wellbore structure and the structure of the drill string equipment; based on the cumulative difference between the actual amount of drilling fluid injected and the theoretical amount of drilling fluid injected, determine whether there is a well leakage or a well kick; if there is a well leakage or a well kick, control the sound and light alarm 7 to give an abnormal alarm.

[0055] Specifically, if the control computer 3 determines that the current drilling operation condition is pulling out the drill string, first automatically calculate the theoretical volume of drilling fluid to be poured in according to the pre-input wellbore structure and drill string structure. Since the drill string is taken out in multiple times (not all at once), each time corresponds to an actual volume of drilling fluid poured in and a theoretical volume of drilling fluid poured in. Therefore, there are multiple sets of actual and theoretical volumes of drilling fluid poured in. Then calculate the cumulative pouring difference based on the difference between the actual and theoretical volumes of drilling fluid poured in for each set, and determine whether the cumulative pouring difference is within the third interval to determine whether there is a well leakage or overflow. Among them, the third interval can refer to the normal interval range of the pre-set cumulative pouring difference, and the two end values of the third interval are usually set as opposite numbers, such as ±1 cubic meter. Exemplarily, taking the third interval as [-1, 1] as an example, if the cumulative pouring difference is greater than 1 cubic meter, it indicates a well leakage; if the cumulative pouring difference is less than -1 cubic meter, it indicates an overflow. If it is detected that there is a well leakage or overflow, control the sound and light alarm 7 to give an abnormal alarm.

[0056] In this embodiment, optionally, the control computer 3 is further configured to: if the current drilling operation condition is running in the drill string, determine the theoretical volume of drilling fluid to return according to the wellbore structure and drill string structure; based on the cumulative difference between the actual and theoretical volumes of drilling fluid returned, determine whether there is a well leakage or overflow; if there is a well leakage or overflow, control the sound and light alarm 7 to give an abnormal alarm.

[0057] Specifically, if the control computer 3 determines that the current drilling operation condition is running in the drill string, first automatically calculate the theoretical volume of drilling fluid to return according to the pre-input wellbore structure and drill string structure. Similarly, since the drill string is taken out in multiple times (not all at once), each time corresponds to an actual volume of drilling fluid returned and a theoretical volume of drilling fluid returned. Therefore, there are multiple sets of actual and theoretical volumes of drilling fluid returned. Then calculate the cumulative return difference based on the difference between the actual and theoretical volumes of drilling fluid returned for each set, and determine whether the cumulative return difference is within the fourth interval to determine whether there is a well leakage or overflow. Among them, the fourth interval can refer to the normal interval range of the pre-set cumulative return difference, and the two end values of the fourth interval are usually set as opposite numbers, such as ±1 cubic meter. Exemplarily, taking the fourth interval as [-1, 1] as an example, if the cumulative return difference is greater than 1 cubic meter, it indicates an overflow; if the cumulative return difference is less than -1 cubic meter, it indicates a well leakage. If it is detected that there is a well leakage or overflow, control the sound and light alarm 7 to give an abnormal alarm.

[0058] Figure 3AThis is a schematic structural diagram of another drilling fluid volume monitoring device provided in the second embodiment of the present utility model. Among them, the explosion-proof industrial control all-in-one computer serves as a control computer, and the uninterruptible power supply serves as a power supply unit. The data acquisition box is installed in the drilling site tank area, and an isolation type safety barrier and an Advantech ADAM series data acquisition module are arranged inside, and are connected to the explosion-proof industrial control all-in-one computer through a network cable or an RS485 bus. Figure 3A All the sensors shown adopt wired sensors and are installed on the corresponding drilling equipment. The draw-wire displacement sensor selects an optical encoding sensor with a collection resolution of up to 0.732 mm. The explosion-proof industrial control all-in-one computer is installed in the drilling sitting post room, and professional application software is installed inside, which can collect the signals of each sensor and convert them into physical quantities, and obtain information such as the volume of drilling fluid in each drilling fluid tank and the drilling working conditions through processing and calculation. The upper and lower limits of the alarm for the change in the volume of drilling fluid can also be set to send out abnormal alarm signals. The LED display screen selects a 40-inch high-brightness color screen that can work normally under the environmental temperature of -20°C to 60°C and strong light irradiation conditions, meeting the explosion-proof requirements of level IIB in the well site. The LED display screen is installed at a position on the tank surface that is convenient for observation. The audible and visual alarm can select a red-yellow dual-color audible and visual alarm, which can emit sound or light alarms according to the abnormal alarm signal sent by the explosion-proof industrial control all-in-one computer to prompt overflow or well leakage. Among them, the red light represents overflow, and the yellow light represents well leakage. The uninterruptible power supply is installed in the drilling duty room or the comprehensive logging instrument to provide working power for the signal acquisition box, the explosion-proof industrial control all-in-one computer, the LED display screen and the audible and visual alarm.

[0059] Figure 3B This is a schematic structural diagram of another drilling fluid volume monitoring device provided in the second embodiment of the present utility model. Among them, the wireless acquisition gateway serves as a signal acquisition box and is connected to the explosion-proof industrial control all-in-one computer through a network cable. Compared with Figure 3A the device in, the difference is that all sensors adopt wireless sensors. For example, wireless transmission methods such as zigbee or lora can be selected, and it can be powered by lithium batteries, or lithium batteries combined with solar photovoltaic charging technology can be used.

[0060] Figure 3C This is a schematic structural diagram of another drilling fluid volume monitoring device provided in the second embodiment of the present utility model. Compared with Figure 3B the final in, the difference is that the LED display screen adopts n + 1 full-color high-brightness screens, and the size of each LED screen is 384 mm × 192 mm, meeting the explosion-proof requirements of level IIB in the well site. Among them, the LED main screen is used to display the total volume of drilling fluid and its change amount, and the LED sub-screens 1 - LED sub-screen n are respectively used to display the volume of drilling fluid in each single tank of the drilling fluid tank 1 - drilling fluid tank n and its change amount.

[0061] The technical solution of the embodiment of the present utility model judges the drilling working conditions through the working condition detection sensor, and when abnormal data appears under different working conditions, it gives a timely and effective alarm through the sound and light alarm, so as to realize the monitoring of abnormal situations in the drilling process, further enhance the drilling well control management level, and help to better ensure the well control safety.

[0062] Embodiment Three

[0063] Figure 4 FIG. is a schematic structural diagram of another drilling fluid volume monitoring device provided by the third embodiment of the present utility model. This embodiment is optimized based on the above embodiment.

[0064] As Figure 4 shown, the device further includes a display 8, and the display 8 is connected to the control computer 3 and is jointly installed in the sitting post room or the driller's cabin for displaying the data processed by the control computer 3.

[0065] The technical solution of the embodiment of the present utility model can display the data processed by the control computer (including the drilling fluid volume and its change amount in each drilling fluid tank, the total drilling fluid volume and its change amount) in real time and intuitively by setting a display in the sitting post room or the driller's cabin, so that the sitting post personnel can monitor the drilling fluid volume in a timely and effective manner, further enhance the drilling well control management level, and help to better ensure the well control safety.

[0066] The above specific implementation manners do not constitute a limitation to the protection scope of the present utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A drilling fluid volume monitoring device, characterized in that, The device includes: a rope displacement sensor (1), a signal acquisition box (2), a control computer (3), an LED display screen (4), and a power supply unit (5); where: The rope displacement sensor (1) is installed at the top of the float scale on the drilling fluid tank, and is used to detect the moving distance of the pointer of the float scale; The signal acquisition box (2) is installed on the guardrail at the edge of the drilling fluid tank and is connected to the rope displacement sensor (1), and is used to acquire the signal of the rope displacement sensor (1); The control computer (3) is connected to the signal acquisition box (2), and is used to process the detection signals acquired by the signal acquisition box (2); The LED display screen (4) is installed in the area of the drilling fluid tank and is connected to the control computer (3), and is used to obtain and display the data processed by the control computer (3); The power supply unit (5) is used to provide working power for the signal acquisition box (2), the control computer (3), and the LED display screen (4).

2. The device according to claim 1, characterized in that The device further includes a working condition detection sensor (6), the working condition detection sensor (6) is installed on the drilling equipment, and is used to detect the operating state of the drilling equipment; the signal acquisition box (2) is connected to the working condition detection sensor (6), and is used to acquire the signal of the working condition detection sensor (6).

3. The device according to claim 2, characterized in that, The working condition detection sensor (6) includes: a drawworks sensor, a hook load sensor, a pump stroke sensor, a standpipe pressure sensor, and a rotary table speed sensor.

4. The device according to claim 2, characterized in that, The device further includes an audible and visual alarm (7), the audible and visual alarm (7) is connected to the LED display screen (4), and is used to perform abnormal alarm based on the data processed by the control computer (3); the power supply unit (5) is further used to provide working power for the audible and visual alarm (7).

5. The device according to any one of claims 1-4, characterized in that, The device further includes a display (8), the display (8) is connected to the control computer (3), and they are jointly installed in the watch house or the driller's cabin, and are used to display the data processed by the control computer (3).

6. The device according to claim 2 or 3, characterized in that, The rope displacement sensor (1) and the working condition detection sensor (6) adopt wired sensors.

7. The device according to claim 2 or 3, characterized in that, The rope displacement sensor (1) and the working condition detection sensor (6) adopt wireless sensors.

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