Automatic sorting system for pumping pipes at oil pumping well site

Abstract

The application discloses an automatic oil pumping pipe sorting system in an oil pumping well site, comprising a pipeline extraction mechanism, a pipeline leveling mechanism, a pipeline grabbing and transferring mechanism and a pipeline detection mechanism. The pipeline extraction mechanism is used for taking the oil pumping pipe out of the oil well, and the pipeline leveling mechanism is used for horizontally placing the oil pumping pipe in a placing position. The pipeline grabbing and transferring mechanism is used for grabbing the oil pumping pipe in the placing position and moving the oil pumping pipe to a detection position. The pipeline detection mechanism is used for carrying out magnetic flux leakage detection on the oil pumping pipe in the detection position. Compared with the prior art, the automatic oil pumping pipe sorting system detects defects of the oil pumping pipe in the oil pumping well site during the process of periodically taking out the oil pumping pipe, improves the detection efficiency and reduces the detection cost.

Description

Technical Field

[0001] This invention relates to the field of online inspection and sorting technology, and in particular to an automatic sorting system for oil well tubing at the oil well site. Background Technology

[0002] Suction tubing is an essential component of oil wells, a crucial tool for ensuring normal production. A single oil well typically contains nearly a hundred or even several hundred tubing pipes. During pumping operations, these tubing pipes are subjected to high alternating loads, leading to wear, corrosion, and other damage over time. Failure of the suction tubing during production can result in significant economic losses.

[0003] In order to ensure the normal production of oil wells, oil fields usually remove the oil pipes from the oil wells for treatment periodically. Currently, there are three common treatment methods: (1) regularly remove the oil pipes from the oil wells and replace them all, which will result in a large waste of defect-free oil pipes; (2) regularly remove the oil pipes from the oil wells and send them all to the testing agency for testing. This method is less efficient and has high testing and transportation costs; (3) install testing sensors at the wellhead, regularly remove the oil pipes from the oil wells, and perform defect testing on the oil pipes at the wellhead. However, due to the complex structure of the wellhead and the very small space, the testing effect is not good. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic tubing sorting system for oil well sites to improve detection efficiency and reduce detection costs.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention discloses an automatic tubing sorting system for oil well sites, comprising:

[0007] A pipe extraction mechanism for removing a sucker pipe from an oil well;

[0008] A pipe leveling mechanism is used to horizontally position the oil pipe in a placement position.

[0009] A pipe gripping and transferring mechanism is used to grip the oil pipe at the placement position and move the oil pipe to the detection position;

[0010] A pipeline inspection mechanism is used to perform magnetic flux leakage detection on the oil extraction pipe at the inspection location.

[0011] Preferably, the pipeline inspection mechanism includes a support base, a first gripper, a magnetizer, a magnetic flux leakage sensor, a rolling element, and a pushing device; the first gripper includes a first half-grip and a second half-grip, the magnetic flux leakage sensor includes a first magnetic flux leakage sensor and a second magnetic flux leakage sensor, and the magnetizer includes a first magnetizer and a second magnetizer; the first magnetic flux leakage sensor and the first magnetizer are mounted on the first half-grip, the second magnetic flux leakage sensor and the second magnetizer are mounted on the second half-grip, and the rolling element is mounted on both the first magnetic flux leakage sensor and the second magnetic flux leakage sensor;

[0012] The support base includes two supports, which are respectively used to support the two ends of the oil extraction tube of the detection position;

[0013] When the first half-claw and the second half-claw are closed, the first leakage magnetic sensor and the second leakage magnetic sensor form a ring around the outside of the oil extraction tube at the detection position, the first magnetizer and the second magnetizer form a ring around the outside of the oil extraction tube at the detection position, and the rolling body makes rolling contact with the side of the oil extraction tube.

[0014] The pushing device is used to push the first gripper to slide along the axial direction of the sucker pipe, so that the leakage magnetic sensor can detect different positions of the sucker pipe.

[0015] Preferably, the pushing device is a walking robot capable of moving along the axial direction of the oil extraction pipe, and the first gripper is connected to an opening and closing mechanism.

[0016] Preferably, the pipeline inspection mechanism further includes a controller, a cleaning device, and a painting device. The controller is electrically connected to the magnetic flux leakage sensor and the painting device, respectively. After the pipeline gripping and transferring mechanism moves the oil extraction pipe to the inspection position, the cleaning device cleans the oil extraction pipe at the inspection position. When the magnetic flux leakage sensor detects magnetic flux leakage, the controller controls the painting device to paint the oil extraction pipe with magnetic flux leakage defects.

[0017] Preferably, the cleaning device, the painting device, and the controller are all mounted on the pushing device.

[0018] Preferably, the pipeline inspection mechanism further includes an elastic connection device, which is mounted on the pushing device, and the cleaning device, the first gripper, and the painting device are mounted on the elastic connection device; the elastic connection device is capable of elastic deformation.

[0019] Preferably, the elastic connection device includes a bracket, a first sleeve, and a second sleeve. The cleaning device, the first gripper, and the painting device are all mounted on the bracket. A first buffer spring is provided inside the first sleeve, and a second buffer spring is provided inside the second sleeve. The bottom of the bracket has a crossbar, the two ends of which are respectively inserted into the first sleeve and the second sleeve and can slide along the first sleeve and the second sleeve. The crossbar, the first sleeve, and the second sleeve are all parallel to the axis of the sucker pipe held by the first gripper. The first buffer spring is located between the first end of the crossbar and the bottom of the first sleeve, and the second buffer spring is located between the second end of the crossbar and the second sleeve, thereby providing cushioning when the bracket slides. The bracket also includes a first vertical bar and a second vertical bar fixed to the crossbar. The first gripper and the painting device are fixed to the first vertical bar, and the cleaning device is fixed to the second vertical bar. The end of the second vertical bar opposite to the crossbar is a pipe support member, which is used to slide and support the sucker pipe to avoid bending deformation caused by gravity affecting the detection.

[0020] Preferably, the pipe gripping and transferring mechanism includes an elastic swing arm, a second gripper, and a swing arm drive device. The second gripper is mounted on the elastic swing arm. The second gripper is used to grip the sucker pipe at the placement position and release the sucker pipe at the detection position. The elastic swing arm is used to move the sucker pipe at the placement position to the detection position, and the elastic swing arm is elastically deformable. The swing arm drive device drives the elastic swing arm to rotate.

[0021] The present invention achieves the following technical effects compared to the prior art:

[0022] This invention allows for on-site testing of the oil well tubing after it is removed from the well, eliminating the need to transport it to a testing facility, thereby improving testing efficiency and reducing testing costs.

[0023] In a preferred embodiment of the present invention, the detection range of the leakage magnetic field sensor mounted on the first gripper is expanded and the detection efficiency is improved by pushing the device to move the first gripper.

[0024] In a preferred embodiment of the present invention, the elastic swing arm and the elastic connecting device utilize their own deformation capabilities to adapt to the curved portion of the sucker pipe, thereby avoiding damage to the sucker pipe. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a top-view schematic diagram of the automatic tubing sorting system at an oil well site according to an embodiment of the present invention.

[0027] Figure 2 This is a side view of the automatic tubing sorting system at the oil well site according to an embodiment of the present invention.

[0028] Figure 3 A schematic diagram showing the top-down view of the pipe grabbing and transfer mechanism when it grabs the sucker pipe;

[0029] Figure 4 This is a schematic diagram of part of the pipeline inspection mechanism in the front view.

[0030] Figure 5 A schematic diagram showing the second gripper grasping and releasing the sucker tube;

[0031] Figure 6 A schematic diagram of the first gripper grasping and releasing the sucker tube;

[0032] Figure 7 This is a schematic diagram of the first half-claw from the side view.

[0033] Explanation of reference numerals in the attached drawings: 1-Pipe extraction mechanism; 2-Pipe leveling mechanism; 3-Pipe gripping and transfer mechanism; 4-Pipe inspection mechanism; 5-Power distribution control device; 6-Pipe transfer truss; 7-Passive pipe transfer and storage area; 8-Failed pipe transfer and storage area; 9-Oil extraction pipe; 21-Placement position; 31-Second gripper; 311-Third half-gripper; 32-Rubber layer; 33-Elastic swing arm; 331-Connecting spring; 34-Motor; 35-Reducer; 36-Motor mounting base; 41-Inspection position; 411-Support base; 42-First gripper; 421-First half-gripper; 422-Rolling element; 43-Fluorescence sensor; 44-Painting device; 45-Elastic connection device; 46-Cleaning device; 47-Pushing device; 471-Walking wheel; 48-Railway; 49-Magnetizer; 81-Telescopic plate; 91-Failed pipe; 92-Passive pipe. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The purpose of this invention is to provide an automatic tubing sorting system for oil well sites, which enables timely on-site defect detection and evaluation during the periodic removal of tubing.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1 to 7 This embodiment provides an automatic tubing sorting system for oil well sites, including a tubing extraction mechanism 1, a tubing leveling mechanism 2, a tubing grabbing and transferring mechanism 3, and a tubing detection mechanism 4.

[0038] The pipe extraction mechanism 1 is used to remove the sucker pipe 9 from the oil well, and the pipe leveling mechanism 2 is used to horizontally position the sucker pipe 9 at the placement position 21. Both the pipe extraction mechanism 1 and the pipe leveling mechanism 2 are commonly used devices in the field and can be purchased directly from the market; therefore, they will not be described in detail in this embodiment. The pipe gripping and transferring mechanism 3 is used to grip the sucker pipe 9 at the placement position 21 and move it to the detection position 41. The pipe detection mechanism 4 is used to perform magnetic flux leakage detection on the sucker pipe 9 at the detection position 41.

[0039] The working principle of the automatic tubing sorting system at the oil well site in this embodiment is as follows:

[0040] In this embodiment, after the oil pipe 9 is removed from the oil well, it is tested on-site at the oil well, eliminating the need to transport it to a testing agency, thereby improving testing efficiency and reducing testing costs.

[0041] As a possible example, in this embodiment, the pipeline detection mechanism 4 includes a support base 411, a first gripper 42, a magnetic flux leakage sensor 43, a rolling element 422, and a pushing device 47. The first gripper 42 includes a first half-grip 421 and a second half-grip. The magnetic flux leakage sensor package 43 includes a first magnetic flux leakage sensor and a second magnetic flux leakage sensor. The magnetizer 49 includes a first magnetizer and a second magnetizer. The first magnetic flux leakage sensor and the first magnetizer are mounted on the first half-grip 421, and the second magnetic flux leakage sensor and the second magnetizer are mounted on the second half-grip. Rolling elements 422 are mounted on both the first and second magnetic flux leakage sensors. Two support bases 411 are included, which are used to support the two ends of the sucker pipe 9 of the detection position 41, respectively. The support base 411 has an upward-opening V-shaped groove to support and position the sucker pipe 9 through the groove wall.

[0042] When the first half-jaw 421 and the second half-jaw close, the first and second magnetic leakage sensors form a ring around the outside of the sucker tube 9 at the detection position 41, and the first and second magnetizers also form a ring around the outside of the sucker tube 9 at the detection position 41. The rolling element 422 makes rolling contact with the side of the sucker tube 9. The pushing device 47 pushes the first jaw 42 to slide along the axial direction of the sucker tube 9, so that the magnetic leakage sensor 43 can detect different positions of the sucker tube 9. The magnetic leakage sensor 43 performs real-time detection of the entire sucker tube 9 wall during the movement of the first jaw 42. A change in the received magnetic field during the movement is considered a defect, and the size of the defect is calculated based on the magnetic field change data collected by the magnetic leakage sensor 43.

[0043] The first gripper 42 is generally in the open state with its opening facing upwards. When the sucker tube 9 is moved to the detection position 41, it also falls into the first gripper 42. Afterwards, the first gripper 42 closes, so that the first leakage magnetic sensor and the second leakage magnetic sensor surround the outside of the sucker tube 9 at the detection position 41 in a ring shape, and the rolling element 422 makes rolling contact with the side of the sucker tube 9.

[0044] Since the first and second magnetizers form a ring around the outside of the sucker tube 9 at detection position 41, the sucker tube 9 can be magnetized. When the leakage magnetic field sensor 43 passes the defect location of the sucker tube 9, the magnetic signal received by the leakage magnetic field sensor 43 changes. To reduce the influence of residual magnetism, AC magnetization technology can be used. Since the first and second leakage magnetic field sensors form a complete ring, leakage magnetic field detection can be performed on the entire circumference of a certain position of the magnetized sucker tube 9. By pushing the sucker tube 9 with the pushing device 47, the first and second leakage magnetic field sensors can perform leakage magnetic field detection on different axial positions of the sucker tube 9.

[0045] As a possible example, in this embodiment, the pushing device 47 is a walking robot capable of moving along the axial direction of the oil extraction pipe 9, and the first gripper 42 is connected to an opening and closing mechanism, which is used to control the opening and closing of the first gripper 42.

[0046] As a possible example, in this embodiment, the pipeline inspection mechanism 4 further includes a controller, a cleaning device 46, and a painting device 44. The controller is electrically connected to the magnetic flux leakage sensor 43 and the painting device 44, respectively. After the pipeline gripping and transferring mechanism 3 moves the sucker pipe 9 to the detection position 41, the cleaning device 46 cleans the sucker pipe 9 at the detection position 41. When the magnetic flux leakage sensor 43 detects magnetic flux leakage, the controller controls the painting device 44 to paint the sucker pipe 9 with magnetic flux leakage defects. By painting the sucker pipe 9 with magnetic flux leakage defects, it is easier to distinguish the sucker pipe 9.

[0047] As a possible example, in this embodiment, the cleaning device 46, the painting device 44, and the controller are all mounted on the pushing device 47, which simultaneously moves the cleaning device 46, the painting device 44, and the first gripper 42. During the movement of the pushing device 47, the cleaning device 46 synchronously cleans the oil extraction tube 9 at the detection position 41. When the magnetic leakage sensor 43 detects magnetic leakage during the movement of the pushing device 47, the painting device 44 directly sprays paint near the magnetic leakage defect, facilitating the quick and accurate location of the defect in the oil extraction tube 9 during subsequent repair work.

[0048] As a possible example, in this embodiment, the pipeline inspection mechanism 4 further includes an elastic connection device 45, which is mounted on the pushing device 47. The cleaning device 46, the first gripper 42, and the painting device 44 are mounted on the elastic connection device 45. The elastic connection device 45 is capable of elastic deformation.

[0049] In this embodiment, the elastic connection device 45 includes a bracket, a first sleeve, and a second sleeve. The cleaning device 46, the first gripper 42, and the painting device 44 are all mounted on the bracket. A first buffer spring is provided inside the first sleeve, and a second buffer spring is provided inside the second sleeve. The bottom of the bracket has a crossbar, with both ends inserted into the first and second sleeves respectively, and capable of sliding along them. The crossbar, the first sleeve, and the second sleeve are all parallel to the axis of the sucker pipe 9 held by the first gripper 42. The first buffer spring is located between the first end of the crossbar and the bottom of the first sleeve, and the second buffer spring is located between the second end of the crossbar and the second sleeve, thus providing cushioning when the bracket slides. The bracket also includes a first vertical bar and a second vertical bar fixed to the crossbar. The first gripper 42 and the painting device 44 are fixed to the first vertical bar, and the cleaning device 46 is fixed to the second vertical bar. The end of the second vertical bar opposite to the crossbar is a pipe support member used for sliding support of the sucker pipe 9. It should be noted that when the long sucker pipe 9 is supported at both ends, the middle part will deform due to gravity. To reduce the impact of deformation on the inspection, the pipe support at the end of the second vertical rod can support the sucker pipe 9 during inspection.

[0050] As a possible example, in this embodiment, the pipe gripping and transferring mechanism 3 includes an elastic swing arm 33, a second gripper 31, and a swing arm drive device. The second gripper 31 is mounted on the elastic swing arm 33. The second gripper 31 is used to grip the sucker pipe 9 at the placement position 21 and release the sucker pipe 9 at the detection position 41. The elastic swing arm 33 is used to move the sucker pipe 9 at the placement position 21 to the detection position 41, and the elastic swing arm 33 can extend and retract along its own length. The swing arm drive device drives the elastic swing arm 33 to rotate. In this embodiment, the swing arm drive device includes a motor 34 and a reducer 35. The output shaft of the motor 34 is connected to the input shaft of the reducer 35, and the output shaft of the reducer 35 is connected to the elastic swing arm 33. The motor 34 can rotate forward and reverse to drive the swing arm to swing back and forth. This embodiment utilizes the deformation of the elastic swing arm 33 itself to provide a flexible buffer space, allowing the second gripper 31 to adjust its position to adapt to the shape of the sucker pipe 9.

[0051] As a possible example, in this embodiment, the pipe gripping and transferring mechanism 3 also includes a motor mounting base 36, on which both the motor 34 and the reducer 35 are fixed. It should be noted that the motor mounting base 36 does not extend below the elastic swing arm 33 to avoid obstructing the rotation of the elastic swing arm 33.

[0052] 33-inch flexible swing arm Figure 2 After rotating clockwise to the detection position 41, the second gripper 31 is released, and the elastic swing arm 33 continues to rotate clockwise at a certain angle to make room for the detection gripper. After the detection is completed, the swing arm grips the pipe counterclockwise for classification.

[0053] In this embodiment, the second gripper 31 has the same structure as the first gripper 42. Specifically, the second gripper 31 includes a third half-jaw 311 and a fourth half-jaw, which can grip and release the sucker tube 9. The elastic swing arm 33 includes a first connecting section, a second connecting section, and a connecting spring 331. The first end of the first connecting section is connected to the output shaft of the reducer 35, and the second end of the first connecting section is slidably sleeved with the first end of the second connecting section, with the maximum distance between the first connecting section and the second connecting section limited by a limiting block. The two ends of the connecting spring 331 abut against the first connecting section and the second connecting section respectively to provide an elastic thrust that moves the first connecting section and the second connecting section away from each other. The second end of the second connecting section is hinged to the first half-jaw 421 and the second half-jaw respectively. It should be noted that some parts of the sucker tube 9 have local areas of bending deformation. In this embodiment, the deformation of the elastic connecting device 45 itself is used to provide a flexible buffer space to adapt to the shape of the sucker tube 9.

[0054] As a possible example, in this embodiment, a rubber layer 32 is provided on the inner side of the second gripper 31. The rubber layer 32 has elastic deformation capability and is used to directly contact the sucker tube 9. When the second gripper 31 grips the sucker tube 9, the rubber layer 32 is located between the second gripper 31 and the sucker tube 9 to avoid the second gripper 31 scratching the sucker tube 9.

[0055] As a possible example, in this embodiment, the pushing device 47 is mounted on a track 48, which is parallel to the oil extraction pipe 9 of the detection position 41, to guide the pushing device 47.

[0056] As a possible example, in this embodiment, the pipeline gripping and transferring mechanism 3 is not only used to grip the sucker pipe 9 at the placement position 21 and move it to the inspection position 41, but also used to classify and place the sucker pipe 9 that has completed inspection. Specifically, in this embodiment, a qualified pipeline transfer and storage area 7 is set on the side of the placement position 21 away from the inspection position 41, and a failed pipeline transfer and storage area 8 is set on the side of the inspection position 41 away from the placement position 21.

[0057] As a possible example, in this embodiment, the non-conforming pipe transfer and storage area 8 is equipped with a ramp. The pipe gripping and transfer mechanism 3 can place the non-conforming oil pipe 9 at the top of the ramp, so that the oil pipe 9 automatically rolls along the ramp to the non-conforming pipe transfer and storage area 8. A telescopic plate 81 can be provided at the top of the ramp. When the telescopic plate 81 is extended, it can lengthen the ramp to improve the transfer efficiency of the oil pipe 9.

[0058] As a possible example, in this embodiment, the pushing device 47 includes one unit, and the pipe gripping and transferring mechanism 3 includes two units. When transferring the sucker pipe 9, the two pipe gripping and transferring mechanisms 3 grip both ends of the sucker pipe 9 respectively. To make the partial structure of the pipe gripping and transferring mechanism 3 clearer, Figure 3Only the pipe gripping and transferring mechanism 3 located at one end of the oil extraction pipe 9 is shown in the image.

[0059] Reference Figure 1 , Figure 2 In this embodiment, the workflow of the pipeline gripping and transfer mechanism 3 is as follows: After the sucker pipe 9 is horizontally placed at the placement position 21, the pipeline gripping and transfer mechanism 3 grips the sucker pipe 9 at the placement position 21 and moves it to the detection position 41. If the sucker pipe 9 passes the detection at the detection position 41, the pipeline gripping and transfer mechanism 3 returns it to the placement position 21, and then the pipeline transfer truss 6 transfers it to the qualified pipeline transfer storage area 7; if the sucker pipe 9 fails the detection at the detection position 41, the pipeline gripping and transfer mechanism 3 places it on the top of the slope, allowing it to automatically roll along the slope to the unqualified pipeline transfer storage area 8. This completes one work cycle of the pipeline gripping and transfer mechanism 3. Afterwards, the pipeline gripping and transfer mechanism 3 repeats the above process until all sucker pipes 9 have been detected.

[0060] As a possible example, in this embodiment, the automatic tubing sorting system at the well site also includes a power distribution control device 5. The tubing extraction mechanism 1, the tubing leveling mechanism 2, the tubing grabbing and transferring mechanism 3, and the tubing detection mechanism 4 are all electrically connected to the power distribution control device 5 to operate under the control of the power distribution control device 5.

[0061] As a possible example, in this embodiment, the automatic tubing sorting system at the oil well site also includes a pipe transfer truss 6. After the tubing 9 has been inspected, the pipe transfer truss 6 can grab the qualified tubing 9 and transfer it to the qualified pipe transfer storage area 7.

[0062] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An automatic tubing sorting system for oil well sites, characterized in that, include: A pipe extraction mechanism for removing a sucker pipe from an oil well; A pipe leveling mechanism is used to horizontally position the oil pipe in a placement position. A pipe gripping and transferring mechanism is used to grip the oil pipe at the placement position and move the oil pipe to the detection position; A pipeline inspection mechanism, wherein the pipeline inspection mechanism is used to perform magnetic flux leakage detection on the oil extraction pipe at the inspection position; The pipeline inspection mechanism includes a support base, a first gripper, a magnetizer, a magnetic flux leakage sensor, a rolling element, and a pushing device; the pushing device is used to push the first gripper to slide along the axial direction of the oil pipe, so that the magnetic flux leakage sensor can detect different positions of the oil pipe. The pipeline inspection mechanism also includes a controller, a cleaning device, and a painting device; after the pipeline gripping and transferring mechanism moves the oil sucker pipe to the inspection position, the cleaning device cleans the oil sucker pipe at the inspection position; when the magnetic leakage sensor detects magnetic leakage, the controller controls the painting device to paint the oil sucker pipe with magnetic leakage defects. The pipeline inspection mechanism further includes an elastic connection device, which is mounted on the pushing device. The cleaning device, the first gripper, and the painting device are mounted on the elastic connection device. The elastic connection device is capable of elastic deformation. The elastic connection device includes a bracket, a first sleeve, and a second sleeve. The cleaning device, the first gripper, and the painting device are all mounted on the bracket. A first buffer spring is provided inside the first sleeve, and a second buffer spring is provided inside the second sleeve. The bottom of the bracket has a crossbar, the two ends of which are respectively inserted into the first sleeve and the second sleeve and can slide along the first sleeve and the second sleeve. Both the first sleeve and the second sleeve are parallel to the axis of the sucker tube held by the first gripper; the first buffer spring is located between the first end of the crossbar and the bottom of the first sleeve, and the second buffer spring is located between the second end of the crossbar and the second sleeve, thereby providing cushioning when the support slides; the support also includes a first vertical bar and a second vertical bar fixed to the crossbar, the first gripper and the painting device are fixed to the first vertical bar, and the cleaning device is fixed to the second vertical bar; the end of the second vertical bar opposite to the crossbar is a pipe support member, which is used to slide and support the sucker tube to avoid bending deformation caused by gravity affecting the detection.

2. The automatic tubing sorting system at the oil well site according to claim 1, characterized in that, The first gripper includes a first half-grip and a second half-grip; the magnetic flux leakage sensor includes a first magnetic flux leakage sensor and a second magnetic flux leakage sensor; the magnetizer includes a first magnetizer and a second magnetizer; the first magnetic flux leakage sensor and the first magnetizer are mounted on the first half-grip; the second magnetic flux leakage sensor and the second magnetizer are mounted on the second half-grip; and the rolling element is mounted on both the first magnetic flux leakage sensor and the second magnetic flux leakage sensor. The support base includes two supports, which are respectively used to support the two ends of the oil extraction tube of the detection position; When the first half-claw and the second half-claw are closed, the first leakage magnetic sensor and the second leakage magnetic sensor form a ring around the outside of the oil extraction tube at the detection position, the first magnetizer and the second magnetizer form a ring around the outside of the oil extraction tube at the detection position, and the rolling element makes rolling contact with the side of the oil extraction tube.

3. The automatic tubing sorting system at the oil well site according to claim 2, characterized in that, The propulsion device is a walking robot capable of moving along the axial direction of the oil extraction pipe, and the first gripper is connected to an opening and closing mechanism.

4. The automatic tubing sorting system at the oil well site according to claim 3, characterized in that, The controller is electrically connected to the magnetic leakage sensor and the painting device, respectively.

5. The automatic tubing sorting system at the oil well site according to claim 4, characterized in that, The cleaning device, the painting device, and the controller are all mounted on the pushing device.

6. The automatic tubing sorting system at the oil well site according to claim 1, characterized in that, The pipe gripping and transferring mechanism includes an elastic swing arm, a second gripper, and a swing arm drive device. The second gripper is mounted on the elastic swing arm. The second gripper is used to grip the sucker pipe at the placement position and release the sucker pipe at the detection position. The elastic swing arm is used to move the sucker pipe at the placement position to the detection position, and the elastic swing arm is elastically deformable. The swing arm drive device drives the elastic swing arm to rotate.

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