Coupling detection lateral force measurement experiment device and method

Abstract

The invention relates to the field of oil and gas well under-pressure workover operation, and provides a coupling detection lateral force measurement experiment device which comprises a migration module, a hydraulic module, a detection module, a processing module, an experiment piece, a test cavity and a supporting frame. The experiment steps of the device are as follows: step 1, installation and connection of the experiment device; 2, checking equipment and initializing parameters; 3, inputting size data; 4, adjusting the spatial position of the experiment piece; step 5, data acquisition; step 6, simulating underground deviation; 7, the experiment piece moves upwards; step 8, data processing and result calculation; and 9, disassembly and maintenance are carried out. The invention provides a coupling detection lateral force measurement and calculation method in the step 8. The method comprises the following steps: step 1, constructing a planar two-dimensional coordinate system; 2, lateral force vector synthesis calculation; step 3, calculating an offset; according to the method, the magnitude of the lateral force needing to be provided by the mechanical coupling detection device when the oil pipe (sucker rod) deviates can be calculated, and the offset of the oil pipe (sucker rod) can be determined.

Description

Technical Field

[0001] The invention relates to the field of well repair operations under pressure in oil and gas wells, and in particular to a collar detection device for well repair operations under pressure. Background Art

[0002] In the well repair operation under pressure in oil and gas wells, accurate detection of couplings is a key link to ensure timely opening and closing of the blowout preventer gate and to ensure the safety and efficiency of the operation. The mechanical coupling detection device identifies the coupling position by detecting the signal change caused by the sudden change of the outer diameter of the pipe string (the coupling diameter is larger than the pipe body). Its detection core relies on the real-time tracking of the contour of the tubing (sucker rod) by the pressure probe. However, in the complex downhole environment, the tubing (sucker rod) is subject to factors such as upward force, friction with the well wall and its own weight, which is prone to dynamic deviation and shaking, which poses a challenge to the reliability of the detection device.

[0003] The lateral force provided by the pressure probe is a key parameter to ensure the reliability of detection. When the lateral force is insufficient, it is difficult for the coupling detection device to effectively track the contour of the tubing (sucker rod), which may easily lead to false alarms; while excessive lateral force may cause the tubing (sucker rod) coupling to get stuck, increasing the risk of failure. In addition, when the tubing (sucker rod) is offset, the lateral force applied by the coupling detection device will work together with other external forces to cause yielding, thereby causing overall structural damage. In view of the difficulties of insufficient understanding of lateral force and quantification of the spatial position of the tubing, combined with the problem that the diameter of the sucker rod is smaller than the tubing and the size of the traditional pressure probe is not matched, and the detection effect is poor, the present invention designs and proposes a set of experimental devices and calculation methods for measuring the lateral force of coupling detection. By optimizing the size of the pressure probe, the detection sensitivity of the small sucker rod is improved; and the offset phenomenon of the tubing (or sucker rod) during the lifting process of the coupling structure is simulated, the size and direction of the required lateral force are accurately calculated, and the spatial position of the experimental piece is determined. Summary of the invention

[0004] Aiming at the problem of accurate determination of the lateral force of the pressure probe in the mechanical coupling detection device and the unclear spatial position of the oil pipe (sucker rod), the present invention designs an experimental device and method for measuring the lateral force of the coupling detection. The present invention can effectively determine the lateral force of the coupling detection probe and the displacement of the oil pipe (sucker rod) in the wellbore of the oil well, thereby improving the reliability and accuracy of the detection.

[0005] The present invention provides a coupling detection lateral force measurement experimental device, the experimental device comprising: a transport module, a hydraulic module, a detection module, a processing module, an experimental piece, a test cavity, and a support frame;

[0006] The migration module consists of a gantry crane and an electric hoist. The main body of the gantry crane is a gantry frame structure, with the main beam supported by two side legs and moving through four rollers at the legs, used to suspend the experimental piece of tubing (sucker rod) coupling. The electric hoist consists of components such as a motor, pulley, reducer, drum, wire rope, and hook. The spatial position of the electric hoist is changed through the remote controller equipped with the electric hoist. The electric hoist can move along the crossbeam of the gantry crane to adapt to the adjustment requirements of the experimental horizontal spatial position. The electric hoist moves in the vertical spatial position to achieve the function of lifting the experimental piece.

[0007] The hydraulic module consists of a hydraulic cylinder, a hydraulic control station, and hydraulic pipeline connections. The hydraulic control station drives a hydraulic pump through a motor to generate high-pressure oil. Through the coordinated adjustment of a pressure valve, a flow valve, and a direction valve, the oil pressure, flow rate, and flow direction output to the hydraulic cylinder are controlled in real time, and an adjustable lateral thrust is output. The piston and piston rod of the hydraulic cylinder are pushed by hydraulic oil, and the piston rod is placed in the side hole of the test chamber to push the experimental piece (tubing or sucker rod) to make it deflect, simulating the deflection condition of the pipe string underground.

[0008] The detection module can measure experimental pieces with a diameter of 25 mm to 150 mm. The detection module includes a housing, a pressure probe, a spring, a displacement sensor, a main control component, and a seal. The housing is a hollow cylinder with an inner diameter of 188 mm, and six cylindrical holes with a diameter of 16 mm are evenly distributed on the inner wall. Six pressure probes are respectively located in the six cylindrical holes, and the included angle between adjacent two holes is 60°. The holes are numbered A, B, C, D, E, F in a counterclockwise direction around the circumference. There is a rectangular placement cavity behind the holes, and the size of the rectangular placement cavity is 60 mm × 60 mm × 100 mm; the total length of the pressure probe is 105 mm, the diameter is 15 mm, and the top fillet is 7.5 mm; the displacement sensor selects a linear variable differential transformer, and the displacement amount is detected by detecting the magnetic field change when the pressure probe moves. The main control component consists of a pressure sensor, a signal transmission device, a control element, and a power supply. As Figure 3 shown, the pressure sensor is a piezoresistive sensor, which detects the pressure magnitude by using the resistance change of a semiconductor strain gauge under pressure; the signal transmission device consists of a signal acquisition unit, a preprocessing unit, and a Wi-Fi6 transmission unit. The preprocessing unit establishes a digital channel with the control center, and transmits the data of the two groups of sensors to the detection module through the Wi-Fi6 transmission unit; the control element controls the working states of the pressure sensor and the displacement sensor; the power supply supplies power to the pressure sensor, the signal transmission device, the control element, and the displacement sensor.

[0009] The processing module consists of a signal receiving unit, a calculation unit, a control board and a power supply, which are connected by wires to form a closed-loop system. When the control unit in the detection module sends a signal, the signal receiving unit starts to receive the pressure and displacement data sent via the data transmission device. The calculation unit analyzes and calculates the lateral force vector parameters and the offset of the test piece. The test piece consists of a coupling and two 1m-long tubing (sucker rods). There are internal tubing threads at both ends of the inner side of the coupling, and external tubing threads at the upper and lower ends of the tubing (sucker rods). The test chamber is a hollow cylinder with holes for placing the hydraulic cylinder piston on the side. It is fixed to the experimental site by bolts to restrict the spatial displacement of the test piece. The support frame is fixed to both sides of the housing by bolts to support and fix the detection module, preventing the test piece from pushing against it and causing the module to fail due to damage.

[0010] The steps of the experimental device are as follows: Step 1, installation and connection of the experimental device: Connect the gantry crane and the electric hoist by bolts; Connect the hydraulic cylinder to the hydraulic control station through a high-pressure pipeline; Install the displacement sensor coaxially in the cylindrical hole of the housing. The pressure probe passes through the sensor coil, is connected to the spring through a buckle and placed in the placement cavity. The tail of the spring tightly presses the sensor sensing surface. After the main control components are connected by wires, they are fixed to the seal by bolts, and then the seal is fixed to the housing by bolts; The two side support frames and the housing are fixed by bolts; The processing module uses wires to connect the signal receiving unit, the calculation unit, the control board and the power supply; Thread the tubing (sucker rod) and the coupling; Fix the test chamber to the ground with bolts, and place the hydraulic cylinder piston at the side hole;

[0011] Step 2, equipment inspection and initialization of parameters: Check whether the connections of each module are reliable. At the same time, check and start the built-in self-check program of the detection module, and sequentially calibrate the zero displacement of the 6 pressure probes and the reference load of the pressure sensor, and check whether the power of the power supply is sufficient. Initialize the data of each module;

[0012] Step 3, input of dimensional data: Input the dimensional data of the measured test piece into the processing module, and input the working pressure of the hydraulic cylinder into the hydraulic control station;

[0013] Step 4, adjust the spatial position of the test piece: The operator remotely controls the electric hoist to accurately lift the test piece to the position where the central axes of the detection module and the test chamber are aligned. The coupling of the test piece needs to be more than 50 cm below the detection module;

[0014] Step 5, data acquisition: When the test piece is placed in the detection module, the six groups of pressure probes generate a retraction movement. The pressure sensor and the displacement sensor detect the data, and the control element sends the corresponding data and the signal to start recording to the processing module through the signal transmission device;

[0015] Step 6, simulate downhole offset: The hydraulic cylinder starts to work, and the piston is pushed by the oil pressure to push the lower part of the test piece, forcing the test piece to generate a constant lateral offset;

[0016] Step 7, upward movement of the test piece: The test piece is lifted at a constant speed according to the required speed by controlling the electric hoist. When the collar reaches the position of the detection module, the six groups of pressure probes simultaneously generate retraction displacements. At this time, the control element issues a pause signal, and the displacement sensor and the pressure sensor stop data acquisition and enter the low-power standby state;

[0017] Step 8, data processing and result calculation: The processing module performs calculation and processing based on the structural dimensions of the test piece and the received data, and analyzes the magnitude, direction, and offset of the test piece based on the lateral force measurement calculation method for collar detection;

[0018] Step 9, disassembly and maintenance: After the test, disassemble the device and perform maintenance for future use.

[0019] Correspondingly, the present invention also proposes a lateral force measurement calculation method for collar detection, and the steps are as follows: Step 1, construction of a two-dimensional plane coordinate system: Establish a two-dimensional plane coordinate system with the geometric center of the detection module housing as the origin: The positive direction of the X-axis is defined as the advancing direction along the hydraulic cylinder piston rod; The positive direction of the Y-axis is defined as being orthogonal to the X-axis and pointing to the rear of the gantry crane, and the plane where the coordinate system is located is composed of the center lines of the six groups of pressure probes;

[0020] Step 2, calculation of lateral force vector synthesis: Based on the spatial distribution of the six probes (circumferential interval of 60°), decompose the lateral forces received by each group of pressure probes onto the X-axis and Y-axis through the following formula, and then calculate the lateral resultant force F 合 Magnitude:

[0021] where, F i is the magnitude of the lateral force received by each group of pressure probes; θ i is the angle between each group of pressure probes and the positive direction of the X-axis ; Decompose the lateral forces received by each group of pressure probes onto the X-axis and Y-axis through the following formula, and then calculate the included angle θ between the lateral force resultant and the positive direction of the axis 合 :

[0022] Step 3: Offset calculation: After the experiment stops, decompose the displacements of each group of pressure probes to obtain the direction vectors D generated by each pressure probe on the X-axis and Y-axis i :

[0023] where, d i is the displacement of each group of pressure probes at the same time during the experiment.

[0024] Add the above vectors to obtain the total offset vector D 总 :

[0025] where x is the projection length of the total offset vector on the x-axis; is the projection length of the total offset vector on the y-axis.

[0026] The magnitude D of the total offset of the test piece 总 is calculated by the formula for the magnitude of a vector:

[0027] An experimental device and method for measuring the lateral force of a coupling detector provided by the present invention has the following advantages compared with the prior art: 1. The experimental device and method for measuring the lateral force of the coupling detector of the present invention can effectively determine the range of the lateral force of the coupling detector and calculate the offset of the tubing (sucker rod);

[0028] 2. The experimental device for measuring the lateral force of the coupling detector of the present invention can measure both the range of the lateral force required between the tubing and the coupling and the range of the lateral force of the sucker rod coupling. Moreover, the experimental device has low power consumption, high reliability and can be used multiple times. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the experimental device for measuring the lateral force of the coupling detector provided by the present invention; Figure 2 is a schematic diagram of the detection module of the experimental device for measuring the lateral force of the coupling detector provided by the present invention; Figure 3 is a schematic diagram of the main control component of the detection module of the experimental device for measuring the lateral force of the coupling detector provided by the present invention; Figure 4 is a flowchart of the calculation method for measuring the lateral force of the coupling detector provided by the present invention; Figure 5 is a planar coordinate system diagram of the calculation method for measuring the lateral force of the coupling detector provided by the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings and not all of the content. Embodiment

[0031] An embodiment of the present invention provides an experimental device for measuring the lateral force of a coupling detector, as Figure 1As shown in the figure, it includes the following parts: a migration module 1, a hydraulic module 2, a detection module 3, a processing module 4, a test piece 5, a test chamber 6, and a support frame 7.

[0032] Among them, the migration module 1 is composed of a gantry crane and an electric hoist connected by bolts, and the spatial position of the electric hoist is changed through remote control; the hydraulic module 2 is composed of a hydraulic cylinder and a hydraulic control station connected by high-pressure pipelines. The hydraulic control station releases oil pressure to push the piston and the piston rod to move axially. The piston rod is placed at the side hole of the test chamber to push the test piece to simulate downhole offset. The detection module 3 is as Figure 2 shown, and can measure the passing state of the coupling of the test piece with a diameter of 25 mm to 150 mm, including a housing 8, a pressure probe 9, a spring 10, a displacement sensor 11, a main control component 12, and a seal 13. Among them, the main control component 12 is composed of a pressure sensor 14, a signal transmission device 15, a control element 16, and a power supply 17, as Figure 3 shown, and is used to detect the magnitude and direction of the lateral force generated when the tubing (sucker rod) is offset and the offset amount of the tubing (sucker rod); the processing module 4 is composed of a signal receiving unit, a calculation unit, a control board, and a power supply, and calculates the magnitude, direction, and offset amount of the lateral force; the test piece 5 is composed of a coupling and two 1-meter-long tubing (sucker rods). There are internal pipe threads at both ends of the inner side of the coupling, and external pipe threads at the upper and lower ends of the tubing (sucker rod). The test piece is assembled through threads; the test chamber 6 is a hollow cylinder, and there are holes for placing the piston of the hydraulic cylinder on the side, and it is fixed to the experimental site by bolts, playing a role in restricting the spatial displacement of the test piece; the support frame 7 supports and fixes the detection module 3 to prevent the module from being damaged due to the pushing of the test piece.

[0033] The experimental steps are as follows: Step 1, connect the gantry crane and the electric hoist with bolts; connect the hydraulic cylinder to the hydraulic control station through a high-pressure pipeline; coaxially install the displacement sensor in the cylindrical hole of the housing, pass the pressure probe through the sensor coil, connect it to the spring through a buckle and place it in the placement cavity, press the tail of the spring tightly against the sensor sensing surface, connect the main control components through wires and then fix them on the seal through bolts, and then fix the seal on the housing through bolts; fix the two side support frames and the housing with bolts; connect the signal receiving unit, calculation unit, control board and power supply of the processing module with wires; connect the oil pipe (sucker rod) and the coupling with threads; fix the test cavity to the ground with bolts, and place the piston of the hydraulic cylinder at the side hole. Step 2, check whether the connections of all modules are reliable, and at the same time check and start the built-in self-check program of the detection module, sequentially calibrate the zero displacement of the 6 pressure probes and the reference load of the pressure sensor, and check whether the power of the power supply is sufficient, and initialize the data of each module. Step 3, input the size data of the measured test piece into the processing module, and input the working pressure of the hydraulic cylinder into the hydraulic control station. Step 4, remotely control the electric hoist, accurately lift the test piece to the position where the central axes of the detection module and the test cavity are aligned, and lower the test piece until the coupling is more than 50 cm below the detection module. Step 5, when the test piece is placed in the detection module, the six groups of pressure probes generate a retraction movement, the pressure sensor and the displacement sensor detect data, and the control element sends the corresponding data and the signal starting to be recorded to the processing module through the signal transmission device. Step 6, the hydraulic cylinder starts to work, and the piston is pushed by the oil pressure to push the lower part of the test piece, forcing the test piece to generate a constant lateral offset. Step 7, lift the test piece at a constant speed according to the required speed by controlling the electric hoist. When the coupling reaches the position of the detection module, the six groups of pressure probes simultaneously generate a retraction displacement. At this time, the control element issues a pause signal, and the displacement sensor and the pressure sensor stop data acquisition and enter the low-power standby state. Step 8, the processing module 4 performs calculation and processing based on the structural dimensions of the test piece and the received data, and analyzes the magnitude, direction and offset of the test piece based on the measurement calculation method of the lateral force of the coupling detection. Step 9, after the test is completed, disassemble the device and perform maintenance for the next use. Embodiment

[0034] Figure 4 An embodiment of the present invention provides a method for measuring the lateral force of a coupling detection probe and calculating the offset of an oil pipe (sucker rod), including the following process: Step 1, construction of a plane two-dimensional coordinate system: Establish a plane two-dimensional coordinate system with the geometric center of the detection module housing as the origin as shown in Figure 5 : The positive direction of the X-axis is defined as the direction along the advancement direction of the piston rod of the hydraulic cylinder; the positive direction of the Y-axis is defined as being orthogonal to the X-axis and pointing to the rear of the gantry crane, and the plane where the coordinate system is located is composed of the center lines of the six groups of pressure probes.

[0035] Step 2, Lateral force vector synthesis calculation: Based on the six-probe spatial distribution (circumferential interval of 60°), the lateral forces received by each group of pressure probes are decomposed onto the X-axis and Y-axis through the following formula, and then the lateral resultant force F is calculated. 合 Magnitude:

[0036] where is the magnitude of the lateral force received by each group of pressure probes; θ i is the angle between each group of pressure probes and the positive direction of the X-axis. ; The lateral forces received by each group of pressure probes are decomposed onto the X-axis and Y-axis through the following formula, and then the included angle θ between the resultant lateral force and the positive direction of the axis is calculated. 合 :

[0037] Step 3: Offset calculation: After the experiment stops, the displacements of each group of pressure probes are decomposed to obtain the direction vectors D generated by each pressure probe on the X-axis and Y-axis. i :

[0038] where d i is the displacement of each group of pressure probes at the same time during the experiment.

[0039] Add the above vectors to obtain the total offset vector D 总 :

[0040] where x is the projection length of the total offset vector on the x-axis; y is the projection length of the total offset vector on the y-axis.

[0041] The magnitude D of the total offset of the test piece 总 is calculated through the modulus formula of the vector:

[0042] At this point, the experiment operator can obtain the magnitude, direction, and offset of the lateral force required by the collar detection device when the oil pipe (sucker rod) is offset in the collar detection lateral force measurement device and method provided by the present invention.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: modifying the technical solutions recorded in the foregoing embodiments, or equivalently replacing some or all of the technical features therein, does not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An experimental device for measuring the lateral force of collar detection, characterized in that Including: A migration module, a hydraulic module, a detection module, a processing module, a test piece, a test chamber and a bracket; Among them, the migration module consists of a gantry crane and an electric hoist, which are bolted together. The electric hoist hooks the test piece and changes the spatial position of the electric hoist through remote control. The hydraulic module consists of a hydraulic cylinder and a hydraulic control station, which are connected by high-pressure pipelines. The hydraulic control station regulates the piston thrust of the hydraulic cylinder to push the test piece to simulate downhole offset. The detection module includes a housing, a pressure probe, a spring, a displacement sensor, a main control component and a seal. The pressure probe is placed in a cylindrical hole in the housing. The displacement sensor is coaxially installed in the cylindrical hole of the housing. The pressure probe passes through the sensor coil, is connected to the spring through a buckle and placed in a placement cavity. The tail of the spring tightly presses the sensor induction surface. The main control component is connected by wires and then fixed to the seal by bolts, and then the seal is fixed to the housing by bolts. The processing module consists of a signal receiving unit, a calculation unit, a control board and a power supply, which are connected by wires. The test piece consists of a coupling and two 1m-long oil pipes (sucker rods). Inner pipe threads are provided at both ends of the inner side of the coupling. Outer pipe threads are provided at the upper and lower ends of the oil pipe (sucker rod). The two are connected by threads. The test chamber is a hollow cylinder with a hole for placing the piston of the hydraulic cylinder on the side. It is fixed to the test site by bolts to limit the spatial displacement of the test piece. The support frame is fixed to both sides of the housing by bolts to support and fix the detection module to prevent the module from being damaged and failing due to the pushing of the test piece. The experimental steps of the device are as follows: Step 1, installation and connection of the experimental device; Step 2, equipment inspection and initialization of parameters; Step 3, input of dimension data; Step 4, adjustment of the spatial position of the test piece; Step 5, data acquisition; Step 6, simulation of downhole offset; Step 7, upward movement of the test piece; Step 8, data processing and result calculation; Step 9, disassembly and maintenance.

2. The collar detection lateral force measurement experimental device according to claim 1, characterized in that, The migration module includes a gantry crane and an electric hoist. The main body of the gantry crane is a gantry frame structure, which is supported by two side legs and moves through four rollers at the legs for suspending the coupling test piece of the oil pipe (sucker rod). The electric hoist consists of components such as a motor, a pulley, a reducer, a drum, a steel wire rope and a hook. The motor drives the pulley and the drum to rotate to adjust the spatial position of the test piece.

3. The collar detection lateral force measurement experimental device according to claim 1, characterized in that, The hydraulic module consists of a hydraulic cylinder and a hydraulic control station connected by high-pressure pipelines. The hydraulic control station drives a hydraulic pump by a motor to generate high-pressure oil. Through the coordinated regulation of a pressure valve, a flow valve and a direction valve, it can control the oil pressure, flow rate and flow direction output to the hydraulic cylinder in real time, output a controllable lateral thrust, and push the piston and the piston rod to move axially through the oil pressure. The piston rod is placed at the side hole of the test chamber to push the test piece to simulate downhole offset.

4. The collar detection lateral force measurement experimental device according to claim 1, characterized in that, The detection module can measure the passing state of the collar of the test piece with a diameter of 25 mm to 150 mm, and includes a housing, a pressure probe, a spring, a displacement sensor, a main control component and a seal. The housing is a hollow cylinder with an inner diameter of 188 mm, and six cylindrical holes with a diameter of 16 mm are evenly distributed on the inner wall. The included angle between adjacent two holes is 60°. The holes are sequentially numbered as A, B, C, D, E, and F in the counterclockwise direction of the circumference. There is a rectangular placement cavity behind the holes, and the size of the rectangular placement cavity is 60 mm × 60 mm × 100 mm; the total length of the pressure probe is 105 mm, the diameter is 15 mm, and the top fillet is 7.5 mm; the displacement sensor is a linear variable differential transformer, and the displacement amount is detected by detecting the magnetic field change when the pressure probe moves.

5. The collar detection lateral force measurement experimental device according to claim 4, characterized in that The main control component consists of a pressure sensor, a signal transmission device, a control element and a power supply. The pressure sensor is a piezoresistive sensor, which detects the pressure magnitude by using the resistance change of the semiconductor strain gauge under pressure; the signal transmission device consists of a signal acquisition unit, a preprocessing unit and a Wi-Fi6 transmission unit. The preprocessing unit establishes a digital channel with the control center, and transmits the data of the two groups of sensors to the detection module through the Wi-Fi6 transmission unit; the control element controls the working states of the pressure sensor and the displacement sensor; the power supply supplies power to the pressure sensor, the signal transmission device, the control element and the displacement sensor.

6. The collar detection lateral force measurement experimental device according to claim 1, characterized in that, The processing module consists of a signal receiving unit, a calculation unit, a control board and a power supply, and forms a closed-loop system through wire connection. When the control unit in the detection module sends a signal, the signal receiving unit starts to receive the pressure and displacement data sent via the data transmission device, and the calculation unit analyzes and calculates the lateral force vector parameters and the offset of the test piece.

7. The experimental device for measuring lateral force in collar detection according to claim 1, wherein In step 1, the experimental device is installed and connected, including: connecting the gantry crane and the electric hoist with bolts; connecting the hydraulic cylinder to the hydraulic control station through a high-pressure pipeline; coaxially installing the displacement sensor in the cylindrical hole of the housing, passing the pressure probe through the sensor coil, connecting it to the spring with a buckle and placing it in the placement cavity, pressing the tail of the spring tightly against the sensor sensing surface, fixing the main control component on the seal through a wire connection and then fixing it on the housing with bolts, and then fixing the seal on the housing with bolts; fixing the two side supports and the housing with bolts; connecting the signal receiving unit, the calculation unit, the control board and the power supply of the processing module with wires; connecting the oil pipe (sucker rod) to the collar thread; fixing the test chamber to the ground with bolts, and placing the piston of the hydraulic cylinder at the side hole.

8. The collar detection lateral force measurement experimental device according to claim 1, characterized in that In step 2, the equipment is checked and the initial parameters are set, including: checking whether the connections of all modules are reliable, and at the same time checking and starting the built-in self-check program of the detection module, sequentially calibrating the zero displacement of the 6 pressure probes and the reference load of the pressure sensor, and whether the power of the power supply is sufficient, and initializing the data of each module.

9. The experimental device for measuring the lateral force of collar detection according to claim 1, characterized in that, In step 4, adjust the spatial position of the test piece: the operator remotely controls the electric hoist to accurately lift the test piece to the position where the central axes of the detection module and the test chamber are aligned, and the collar of the test piece needs to be more than 50 cm below the detection module.

10. The collar detection lateral force measurement experimental device according to claim 1, wherein In step 5, data acquisition: When the test piece is placed into the detection module, the six groups of pressure probes generate a retraction movement. The pressure sensors and displacement sensors detect the data, and the control element sends the corresponding data and the signal for starting recording to the processing module through the signal transmission device.

11. The collar detection lateral force measurement experimental device according to claim 1, characterized in that, In step 8, data processing and result calculation: Based on the calculation method for measuring the lateral force of collar detection, analyze the magnitude, direction, and offset of the test piece.

12. The collar detection lateral force measurement and calculation method according to claim 11, characterized in that, The method steps are as follows: Step 1, construction of a planar two-dimensional coordinate system; Step 2, calculation of the synthesis of lateral force vectors; Step 3, calculation of the offset.

13. The collar detection lateral force measurement and calculation method according to claim 11, characterized in that, In step 1, the construction of a planar two-dimensional coordinate system includes: Establish a planar two-dimensional coordinate system with the geometric center of the detection module housing as the origin: The positive direction of the X-axis is defined as the direction of the advancement of the hydraulic cylinder piston rod; the positive direction of the Y-axis is defined as being orthogonal to the X-axis and pointing to the rear of the gantry crane. The plane where the coordinate system is located is composed of the center lines of the six groups of pressure probes.

14. The collar detection lateral force measurement and calculation method according to claim 11, characterized in that In step 2, the calculation of the synthesis of lateral force vectors includes: Based on the six-probe spatial distribution (circumferential interval of 60°), the lateral forces received by each group of pressure probes are decomposed onto the X-axis and Y-axis through the following formula, and then the resultant lateral force F is calculated 合 Magnitude: ； Among them, F i is the magnitude of the lateral force received by each group of pressure probes; θ i is the angle between each group of pressure probes and the positive direction of the X-axis, ; Decompose the lateral forces received by each group of pressure probes onto the X-axis and Y-axis through the following formula, and then calculate the angle θ between the resultant lateral force and the positive direction of the X-axis. 合 :

15. The collar detection lateral force measurement and calculation method according to claim 11, wherein In step 3, the calculation of the offset includes: After the experiment stopped, the displacements of the pressure probes in each group were decomposed to obtain the direction vectors D generated by each pressure probe on the X-axis and Y-axis i : ； where is the displacement of each group of pressure probes at the same time during the experiment; Add the above vectors to obtain the total offset vector D 总 : ； where is the projection length of the total offset vector on the axis; is the projection length of the total offset vector on the axis; The magnitude of the total offset of the test piece is calculated by the formula for the modulus of the vector:

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