Centralizer performance detection device and detection method

Abstract

The present invention relates to a centralizer performance detection device and a detection method. The detection device comprises a frame, a centralizer moving positioning mechanism, a weight detection device, a measuring head, a measuring head transmission mechanism, a pressure detection device, a centralizer locking mechanism, and a control and display device. The present invention is used to detect the mechanical properties of the centralizer, provide a basis for the operation and use of the centralizer, and thus ensure that the oil well instrument is always in a centered position during the logging operation.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum well logging, and in particular to a centralizer performance detection device and a detection method. Background Art

[0002] Centralizer is an indispensable equipment in the process of oil well logging. The function of the centralizer is to ensure that the logging instrument moves along the center of the well wall, and to ensure that the sound waves, electromagnetic waves and light waves emitted by the logging instrument can be received normally, so as to achieve the purpose of accurate well logging. Centralizers are divided into 3-arm centralizers, 4-arm centralizers, 6-arm centralizers, bow centralizers, 6-arm composite centralizers, etc. according to the number of support arms; according to the specifications of the inner diameter of the joint, they are divided into: φ38mm, φ54mm, φ63mm, φ73mm, φ89mm, φ92mm, etc.

[0003] At present, there are no clear operating specifications for the use of the centralizer, especially in terms of the adjustment of the support arms. The size of the support force is completely adjusted based on experience, and the preload force of each support arm cannot be guaranteed to be consistent. Therefore, it is also impossible to ensure that the logging instrument is in the center of the well during logging operations. If the logging instrument is not in the center of the well wall, the accuracy of the received reflected wave will be greatly affected, and there will be a large deviation in the measurement data, which will seriously affect the test accuracy and make the logging operation meaningless.

[0004] So far, in addition to the lack of specific theoretical data support for preload adjustment, the weight of the instrument string in the logging instrument, the weight of the centralizer, and the characteristic curve of the centralizer all have a great impact on its use. These influencing factors lead to unknown and unpredictable characteristics, strength, and state of the centralizer during use, and lack of operability. Summary of the invention

[0005] The invention provides a centralizer performance detection device and detection method, which are used to detect the mechanical characteristics of the centralizer, provide a basis for the operation and use of the centralizer, and ensure that the oil well instrument is always in the center position during the logging operation.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A centralizer performance detection device comprises a frame, a centralizer moving and positioning mechanism, a weight detection device, a measuring head, a measuring head transmission mechanism, a pressure detection device, a centralizer locking mechanism, and a control and display device; a centralizer moving and positioning mechanism is arranged on the top of the frame, a cylinder and a winch are arranged in the centralizer moving and positioning mechanism, and the winch can be driven horizontally by the cylinder; a weight detection device is arranged on a steel wire rope of the winch, and a hook is arranged on the weight detection device for hanging a centralizer to be detected; a measuring head transmission mechanism is arranged on one side of the frame below the moving path of the centralizer moving and positioning mechanism, the measuring head is arranged on the measuring head transmission mechanism and can move horizontally under the drive of the measuring head transmission mechanism, and a displacement detection device is arranged on one side of the measuring head transmission mechanism; the measuring head and the measuring head A pressure detection device is arranged between the transmission mechanisms; two clamping arms are arranged at one end of the measuring head facing the inner side of the frame, and the clamping arms can move up and down along the vertical slide rail on the measuring head; the centralizer locking mechanism is composed of a fixed seat and an elastic locking ring, the fixed seat arranged in the middle of the frame is a one-side open structure, an elastic locking ring is arranged at a position on the measuring head opposite to the open end of the fixed seat, and the centralizer is locked in the fixed seat through the compression deformation of the elastic locking ring; the control and display device includes a control system and an operation display screen connected to the control system, the control ends of the centralizer moving positioning mechanism, the measuring head, and each driving device in the measuring head transmission mechanism are respectively connected to the control system, and the signal output ends of the weight detection device, the displacement detection device, and the pressure detection device are respectively connected to the control system.

[0008] The frame is a movable frame, and rollers are respectively arranged at the four bottom corners of the frame.

[0009] The centralizer moving positioning mechanism is composed of a winch, a linear slide rail, and a cylinder. The fixed end of the cylinder is fixed to the top of the frame, and the cylinder rod of the cylinder is connected to the winch. Linear slide rails are respectively arranged on both sides of the winch and along the moving direction of the winch. A slide seat is arranged at the bottom of the winch to slide in cooperation with the linear slide rail.

[0010] The weight detection device is an electronic scale having data recording and display functions.

[0011] The measuring head is composed of a bracket, two clamping arms and a clamping arm adjustment device, wherein the clamping arm adjustment device includes a double-output shaft servo motor and a screw-nut transmission mechanism; the double-output shaft servo motor is fixed in the middle of the bracket, and its two output shafts are respectively connected to the screws on the corresponding sides of the screw-nut transmission mechanism through couplings, the pitches of the threads on the two screws are the same and the rotation directions are opposite, the two clamping arms are respectively fixedly connected to the nuts, and through the transmission connection between the nut and the screw, the two clamping arms move toward or away from each other along the vertical slide rail on the bracket; a semi-annular clamping block is provided at the protruding end of the clamping arm.

[0012] The measuring head transmission mechanism consists of a servo motor, a ball screw, a screw nut, a movable sleeve, a contact and two linear slide rails; the servo motor is fixed on the crossbeam in the frame, the output shaft of the servo motor is connected to the ball screw and drives it to rotate, the ball screw is connected to the screw nut in a driving manner, the movable sleeve is arranged on the periphery of the ball screw and is fixedly connected to the screw nut, and a contact is arranged at one end of the movable sleeve facing the inner side of the frame; two linear slide rails are arranged on the frames on both sides of the measuring head, and a slide is arranged at the bottom of the measuring head to slide in cooperation with the two linear slide rails; the movable sleeve is slidably connected to the frame through a sliding bracket; the contact at the end of the movable sleeve is used to contact the contact on the pressure detection device.

[0013] The pressure detection device is a pressure sensor.

[0014] The displacement detection device is a grating displacement sensor.

[0015] The operation display screen includes a stabilizer weight display and recording screen, a measuring head displacement display and recording screen, and a pressure sensor display and recording screen.

[0016] The centralizer performance detection method based on the device comprises the following steps:

[0017] 1) Hang the centralizer to be tested on the hook of the weight detection device through the lifting cap, start the winch, move the centralizer to the top of the frame, start the cylinder, and move the centralizer above the detection position; start the winch again, lower the centralizer to the detection position, record the weight of the centralizer, and hang the centralizer on the fixed seat; separate the centralizer from the hook, and lift the weight detection device to the top of the frame;

[0018] 2) Start the double-axis servo motor in the clamping arm adjustment device, adjust the two clamping arms to the positions corresponding to the upper and lower lifting caps of the centralizer, clamp the centralizer with the two measuring arms, and fine-tune the high position of the centralizer so that the center line of the first support arm to be tested on the centralizer coincides with the horizontal center line of the pressure detection device, and then lock and fix the centralizer through the centralizer locking mechanism;

[0019] 3) Start the servo motor in the measuring head transmission mechanism, move the measuring head toward the direction of the centralizer to be tested, so that the contact at the end of the moving sleeve is in close contact with the contact of the pressure detection device; open the first support arm to be tested of the centralizer so that its outermost side contacts the positioning baffle on the pressure detection device; start measurement and data collection; continue to move the measuring head, apply pressure to the support arm under test along the radial direction of the centralizer until it moves to the extreme position of the support arm and stops, keep it for 10 minutes, start the servo motor in the reverse direction, move the measuring head to the measurement starting position at a constant speed, and the detection of the first support arm is completed;

[0020] 4) Start the winch, and after the hook is lowered, hook it onto the lifting cap of the centralizer, loosen the centralizer locking device, and rotate the centralizer horizontally so that the center line of the second support arm to be inspected coincides with the horizontal center line of the pressure detection device, and then lock and fix the centralizer through the centralizer locking mechanism; then inspect the second support arm according to step 3);

[0021] 5) Repeat steps 3) to 4) to measure the performance of each support arm on the centralizer one by one;

[0022] 6) Organize, save and output the measurement data;

[0023] 7) After all the support arms have been inspected, release the locking mechanism of the centralizer, lift the centralizer to the top of the frame by the winch, move it to the starting position by the cylinder, and then remove the centralizer.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1) The present invention realizes the detection of the mechanical characteristics of the centralizer, provides a basis for the operation and use of the centralizer, and thus ensures that the oil well instrument is always in the center position during the logging operation;

[0026] 2) The detection device of the present invention has a simple structure and is easy to operate;

[0027] 3) Suitable for testing centralizers of all types and specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of a centralizer performance detection device described in the present invention.

[0029] Figure 2 yes Figure 1 Right view of .

[0030] Figure 3 yes Figure 1 Top view of the .

[0031] Figure 4 It is a structural schematic diagram of the measuring head and the measuring head transmission mechanism of the present invention.

[0032] Figure 5 yes Figure 4 A partial enlarged view of .

[0033] Figure 6 yes Figure 4 Top view of the .

[0034] Figure 7 The mechanical characteristic curve of the centralizer after detection by the device of the present invention is Figure 1 .

[0035] Figure 8 The mechanical characteristic curve of the centralizer after detection by the device of the present invention is Figure 2 .

[0036] In the figure: 1. Frame 2. Cylinder 3. Hoist 4. Weight detection device 5. Measuring head 6. Clamping arm 7. Measuring head transmission mechanism 71. Servo motor 72. Ball screw 73. Moving sleeve 74. Linear slide rail 2 75. Contact at the end of the moving sleeve 8. Fixed seat 9. Centralizer 10. Operation display 11. Roller 12. Linear slide rail 1 13. Pressure detection device 14. Displacement detection device 15. Elastic locking ring 16. Sliding bracket DETAILED DESCRIPTION

[0037] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0038] like Figure 1-Figure 3 As shown, a centralizer performance detection device described in the present invention comprises a frame 1, a centralizer moving positioning mechanism, a weight detection device 4, a measuring head 5, a measuring head transmission mechanism, a pressure detection device 13, a centralizer locking mechanism, and a control and display device; a centralizer moving positioning mechanism is arranged on the top of the frame 1, a cylinder 2 and a winch 3 are arranged in the centralizer moving positioning mechanism, and the winch 3 can be driven by the cylinder 2 to move horizontally; the weight detection device 4 is arranged on the wire rope of the winch 3, and the weight detection device 4 is provided with a hook for hanging the centralizer 9 to be detected; a measuring head transmission mechanism 7 is arranged on one side of the frame 1 below the moving path of the centralizer moving positioning mechanism, the measuring head 5 is arranged on the measuring head transmission mechanism 7 and can move horizontally under the drive of the measuring head transmission mechanism 7, and a displacement detection device 14 is arranged on one side of the measuring head transmission mechanism 7; the measuring head 5 and the measuring head A pressure detection device 13 is provided between the transmission mechanisms 7; two clamping arms 6 are provided at one end of the measuring head 5 facing the inner side of the frame 1, and the clamping arms 6 can move up and down along the vertical slide rail on the measuring head 7; the centralizer locking mechanism is composed of a fixed seat 8 and an elastic locking ring 15, and the fixed seat 8 provided in the middle of the frame 1 is a one-side open structure, and an elastic locking ring 15 is provided at a position on the measuring head 5 opposite to the open end of the fixed seat 8, and the centralizer 9 is locked in the fixed seat 8 by the elastic locking ring 15 being compressed and deformed; the control and display device includes a control system and an operation display screen 10 connected to the control system, the control ends of the centralizer moving positioning mechanism, the measuring head 5, and each driving device in the measuring head transmission mechanism 7 are respectively connected to the control system, and the signal output ends of the weight detection device 4, the displacement detection device 14, and the pressure detection device 13 are respectively connected to the control system.

[0039] The frame 1 is a movable frame, and rollers 11 are respectively arranged at the four corners of the bottom of the frame 1 .

[0040] The centralizer moving positioning mechanism is composed of a winch 3, a linear slide rail 12, and a cylinder 2. The fixed end of the cylinder 2 is fixed to the top of the frame 1, and the cylinder rod of the cylinder 2 is connected to the winch 3. Linear slide rails 12 are respectively arranged on both sides of the winch 3 and along the moving direction of the winch 3. A slide seat is arranged at the bottom of the winch 3 to slide in cooperation with the linear slide rail 12.

[0041] The weight detection device 4 is an electronic scale having data recording and display functions.

[0042] The measuring head 5 is composed of a bracket, two clamping arms 6 and a clamping arm adjustment device, wherein the clamping arm adjustment device includes a double-output shaft servo motor and a screw-nut transmission mechanism; the double-output shaft servo motor is fixed in the middle of the bracket, and its two output shafts are respectively connected to the screws on the corresponding sides of the screw-nut transmission mechanism through couplings, the pitches of the threads on the two screws are the same and the rotation directions are opposite, the two clamping arms 6 are respectively fixedly connected to the nuts, and through the transmission connection between the nut and the screw, the two clamping arms 6 move toward or away from each other along the vertical slide rail on the bracket; a semi-annular clamping block is provided at the protruding end of the clamping arm 6.

[0043] like Figure 4-Figure 6 As shown, the measuring head transmission mechanism 7 is composed of a servo motor 71, a ball screw 72, a screw nut, a movable sleeve 73, a contact 75 and a linear guide rail 2 74; the servo motor 71 is fixed on the crossbeam in the frame 1, the output shaft of the servo motor 1 is connected to the ball screw 72 and drives it to rotate, the ball screw 72 is connected to the screw nut in a driving manner, the movable sleeve 73 is arranged on the periphery of the ball screw 72 and is fixedly connected to the screw nut, and a contact 75 is arranged at one end of the movable sleeve 73 facing the inner side of the frame 1; linear guide rails 2 74 are arranged on the frame 1 on both sides of the measuring head 5, and a slide is arranged at the bottom of the measuring head 5 to slide in cooperation with the linear guide rails 2 74; the movable sleeve 73 is slidably connected to the frame 1 through a sliding bracket; the contact 75 at the end of the movable sleeve 73 is used to contact the contact on the pressure detection device 13.

[0044] The pressure detection device 13 is a pressure sensor.

[0045] The displacement detection device 14 is a grating displacement sensor.

[0046] The operation 10 includes a centralizer weight display and recording screen, a measuring head displacement display and recording screen, and a pressure sensor display and recording screen.

[0047] The centralizer performance detection method based on the device comprises the following steps:

[0048] 1) Hang the centralizer 9 to be tested on the hook of the weight detection device 4 through the lifting cap, start the winch 3, move the centralizer 9 to the top of the frame 1, start the cylinder 2, and move the centralizer 9 above the detection position; start the winch 3 again, lower the centralizer 9 to the detection position, record the weight of the centralizer 9, and then hang the centralizer 9 on the fixed seat 8; the centralizer 9 is separated from the hook, and the weight detection device 4 is lifted to the top of the frame 1;

[0049] 2) Start the double-axis servo motor in the clamping arm adjustment device, adjust the two clamping arms 6 to the positions corresponding to the upper and lower two lifting caps of the centralizer 9, clamp the centralizer 9 through the two measuring arms 6, and fine-tune the height position of the centralizer 9 so that the center line of the first support arm to be tested on the centralizer 9 coincides with the horizontal center line of the pressure detection device 13, and then lock and fix the centralizer 9 through the centralizer locking mechanism;

[0050] 3) Start the servo motor 71 in the measuring head transmission mechanism 7, move the measuring head 5 toward the direction of the centralizer 9 to be tested, so that the contact 75 at the end of the movable sleeve 73 is in close contact with the contact of the pressure detection device 13; open the first support arm to be tested of the centralizer 9 so that its outermost side contacts the positioning baffle on the pressure detection device 13; start measurement and data collection; continue to move the measuring head 5, apply radial pressure to the support arm under test along the centralizer 9, until it moves to the extreme position of the support arm and stops, keep it for 10 minutes, start the servo motor 71 in the reverse direction, so that the measuring head 5 moves to the measurement starting position at a constant speed, and the detection of the first support arm is completed;

[0051] 4) Start the winch 3, and after the hook is lowered, hook the lifting cap of the centralizer 9, loosen the centralizer locking device, and horizontally rotate the centralizer 9 so that the center line of the second support arm to be inspected coincides with the horizontal center line of the pressure detection device 13, and then lock and fix the centralizer 9 through the centralizer locking mechanism; then inspect the second support arm according to step 3);

[0052] 5) Repeat steps 3) to 4) to measure the performance of each support arm on the centralizer 9 one by one;

[0053] 6) Organize, save and output the measurement data;

[0054] 7) After all the support arms have been inspected, release the locking mechanism of the centralizer, lift the centralizer 9 to the top of the frame 1 by the winch 3, move it to the starting position by the cylinder 2, and then remove the centralizer 9.

[0055] The main functions of the centralizer performance detection device described in the present invention include: detecting the weight of the centralizer, detecting the supporting force of the centralizer, detecting the minimum preload force of the centralizer and drawing the mechanical characteristic curve of the centralizer.

[0056] The frame 1 is used to centrally install various functional mechanisms, and the frame 1 is movable to facilitate mobile operation.

[0057] The centralizer moving and positioning mechanism is used for moving and positioning the centralizer 9 in the frame 1, that is, moving the centralizer 9 to the detection position, and then moving it back to the starting position after the detection is completed.

[0058] The weight detection device 4 is used to measure the weight of the centralizer 9 .

[0059] The measuring head 5 is used for the precise adjustment of the position of the centralizer 9 after it reaches the detection position, that is, to fine-tune the height of the centralizer 9 through the two clamping arms 6 thereon.

[0060] The centralizer locking mechanism is used to lock and fix the centralizer 9 in the detection position through the elastic locking ring 15 on the measuring head 5 and the fixing seat 8.

[0061] The measuring head transmission mechanism 7 is used for the overall movement of the measuring head 5 , and performs various tests on the centralizer 9 in cooperation with the pressure detection device 13 by applying radial pressure to the support arm of the centralizer 9 .

[0062] The control and display device is used to control and operate the various functional mechanisms in the device of the present invention, and to display the collected data in real time, and to draw a mechanical characteristic curve diagram of the centralizer (such as Figure 7 , Figure 8 shown).

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A centralizer performance detection device, characterized in that: It includes a frame, a centralizer moving and positioning mechanism, a weight detection device, a measuring head, a measuring head transmission mechanism, a pressure detection device, a centralizer locking mechanism, and a control and display device; a centralizer moving and positioning mechanism is arranged on the top of the frame, a cylinder and a winch are arranged in the centralizer moving and positioning mechanism, and the winch can be driven by the cylinder to move horizontally; the weight detection device is arranged on the steel wire rope of the winch, and the weight detection device is provided with a hook for hanging the centralizer to be detected; a measuring head transmission mechanism is arranged on one side of the frame below the moving path of the centralizer moving and positioning mechanism, the measuring head is arranged on the measuring head transmission mechanism and can move horizontally under the drive of the measuring head transmission mechanism, and a displacement detection device is arranged on one side of the measuring head transmission mechanism; between the measuring head and the measuring head transmission mechanism A pressure detection device is provided; two clamping arms are provided at one end of the measuring head facing the inner side of the frame, and the clamping arms can move up and down along the vertical slide rail on the measuring head; the centralizer locking mechanism is composed of a fixed seat and an elastic locking ring, the fixed seat arranged in the middle of the frame is a one-side open structure, and an elastic locking ring is provided at a position on the measuring head opposite to the open end of the fixed seat, and the centralizer is locked in the fixed seat through the compression deformation of the elastic locking ring; the control and display device includes a control system and an operation display screen connected to the control system, the control ends of the centralizer mobile positioning mechanism, the measuring head, and each driving device in the measuring head transmission mechanism are respectively connected to the control system, and the signal output ends of the weight detection device, the displacement detection device, and the pressure detection device are respectively connected to the control system.

2. A centralizer performance detection device according to claim 1, characterized in that: The frame is a movable frame, and rollers are respectively arranged at the four bottom corners of the frame.

3. A centralizer performance detection device according to claim 1, characterized in that: The centralizer moving positioning mechanism is composed of a winch, a linear slide rail, and a cylinder. The fixed end of the cylinder is fixed to the top of the frame, and the cylinder rod of the cylinder is connected to the winch. Linear slide rails are respectively arranged on both sides of the winch and along the moving direction of the winch. A slide seat is arranged at the bottom of the winch to slide in cooperation with the linear slide rail.

4. A centralizer performance detection device according to claim 1, characterized in that: The weight detection device is an electronic scale having data recording and display functions.

5. A centralizer performance detection device according to claim 1, characterized in that: The measuring head is composed of a bracket, two clamping arms and a clamping arm adjustment device, wherein the clamping arm adjustment device includes a double-output shaft servo motor and a screw-nut transmission mechanism; the double-output shaft servo motor is fixed in the middle of the bracket, and its two output shafts are respectively connected to the screws on the corresponding sides of the screw-nut transmission mechanism through couplings, the pitches of the threads on the two screws are the same and the rotation directions are opposite, the two clamping arms are respectively fixedly connected to the nuts, and through the transmission connection between the nut and the screw, the two clamping arms move toward or away from each other along the vertical slide rail on the bracket; a semi-annular clamping block is provided at the protruding end of the clamping arm.

6. A centralizer performance detection device according to claim 1, characterized in that: The measuring head transmission mechanism consists of a servo motor, a ball screw, a screw nut, a movable sleeve, a contact and two linear slide rails; the servo motor is fixed on the crossbeam in the frame, the output shaft of the servo motor is connected to the ball screw and drives it to rotate, the ball screw is connected to the screw nut in a driving manner, the movable sleeve is arranged on the periphery of the ball screw and is fixedly connected to the screw nut, and a contact is arranged at one end of the movable sleeve facing the inner side of the frame; two linear slide rails are arranged on the frames on both sides of the measuring head, and a slide is arranged at the bottom of the measuring head to slide in cooperation with the two linear slide rails; the movable sleeve is slidably connected to the frame through a sliding bracket; the contact at the end of the movable sleeve is used to contact the contact on the pressure detection device.

7. A centralizer performance detection device according to claim 1, characterized in that: The pressure detection device is a pressure sensor.

8. A centralizer performance detection device according to claim 1, characterized in that: The displacement detection device is a grating displacement sensor.

9. A centralizer performance detection device according to claim 1, characterized in that: The operation display screen includes a centralizer weight display and recording screen, a measuring head displacement display and recording screen, and a pressure sensor display and recording screen.

10. A method for detecting the performance of a centralizer according to any one of claims 1 to 9, characterized in that: The steps include: 1) Hang the centralizer to be tested on the hook of the weight detection device through the lifting cap, start the winch, move the centralizer to the top of the frame, start the cylinder, and move the centralizer above the detection position; start the winch again, lower the centralizer to the detection position, record the weight of the centralizer, and hang the centralizer on the fixed seat; separate the centralizer from the hook, and lift the weight detection device to the top of the frame; 2) Start the double-axis servo motor in the clamping arm adjustment device, adjust the two clamping arms to the positions corresponding to the upper and lower lifting caps of the centralizer, clamp the centralizer with the two measuring arms, and fine-tune the high position of the centralizer so that the center line of the first support arm to be tested on the centralizer coincides with the horizontal center line of the pressure detection device, and then lock and fix the centralizer through the centralizer locking mechanism; 3) Start the servo motor in the measuring head transmission mechanism, move the measuring head toward the direction of the centralizer to be tested, so that the contact at the end of the moving sleeve is in close contact with the contact of the pressure detection device; open the first support arm to be tested of the centralizer so that its outermost side contacts the positioning baffle on the pressure detection device; start measurement and data collection; continue to move the measuring head, apply pressure to the support arm under test along the radial direction of the centralizer until it moves to the extreme position of the support arm and stops, keep it for 10 minutes, start the servo motor in the reverse direction, move the measuring head to the measurement starting position at a constant speed, and the detection of the first support arm is completed; 4) Start the winch, and after the hook is lowered, hook it onto the lifting cap of the centralizer, loosen the centralizer locking device, and rotate the centralizer horizontally so that the center line of the second support arm to be inspected coincides with the horizontal center line of the pressure detection device, and then lock and fix the centralizer through the centralizer locking mechanism; then inspect the second support arm according to step 3); 5) Repeat steps 3) to 4) to measure the performance of each support arm on the centralizer one by one; 6) Organize, save and output the measurement data; 7) After all the support arms have been inspected, release the locking mechanism of the centralizer, lift the centralizer to the top of the frame by the winch, move it to the starting position by the cylinder, and then remove the centralizer.

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