Intelligent detection device and detection method for tripping oil pipe

Abstract

The present invention relates to the technical field of oil pipeline detection in the petroleum industry, and is an intelligent detection device for lifting and lowering oil pipelines and a detection method thereof. The device comprises a hollow cylindrical shell, on which an oil pipeline passage extending vertically is provided, the oil pipeline passage being concentric with the cylindrical shell, and a plurality of detection modules being evenly arranged around the oil pipeline passage in the cylindrical shell, with a data acquisition and control system being commonly connected to the plurality of detection modules. The device enables real-time detection of the oil pipeline condition, thereby reducing the need for subsequent oil pipeline maintenance work. The device can promptly detect damaged oil pipelines with potential safety hazards, ensure the integrity of the oil pipelines, and avoid engineering accidents caused by oil pipelines not meeting requirements. The device not only overcomes the limitations of single oil pipeline detection methods, namely damage and length, but also improves overall detection efficiency through collaborative data analysis, providing a more comprehensive technical solution for oil pipeline quality assessment, which is of great significance to the sustainable development of oil and gas fields and the safe and efficient production of oil and gas wells.

Description

Technical Field

[0001] The present invention relates to the technical field of oil pipe detection in the petroleum industry, and in particular to an intelligent detection device for tripping and running oil pipes and a detection method thereof. Background Art

[0002] As an essential tool for oil and gas field production, oil pipelines carry the important task of transporting oil and gas. However, due to the complex and harsh downhole operating environment, oil pipelines often suffer various damages such as corrosion, scratches, cracks, perforations, and even fractures. These damages seriously threaten the safe and efficient production of oil wells. To ensure the integrity and reliability of oil pipelines, it is crucial to adopt efficient oil pipeline inspection methods.

[0003] At present, the theoretical system and technology of oil pipe inspection are relatively mature and have been widely used in actual production. In terms of damage detection, the main non-destructive testing methods include magnetic particle testing, eddy current testing, ultrasonic testing and magnetic flux leakage testing. Different testing methods have their own advantages and disadvantages. The magnetic particle testing method has the advantages of good visibility and wide application range, but it is affected by the surface state, has high requirements on materials, is difficult to implement automatically, and requires magnetic powder coating on the surface of the inspected part, which increases the process complexity and cost. The eddy current testing method is simple to operate and has good real-time performance. However, it has limitations such as limited detection depth and the interpretation of detection signals depends on the operator's experience. Ultrasonic testing has a poor effect on the surface of the oil pipe. The requirements are high and require coupling agents, which seriously affect the detection efficiency and accuracy. Although the leakage magnetic detection technology requires the pipe to be magnetized to a saturated or near-saturated state, it has the ability to detect damage depth and high sensitivity, and can also achieve real-time detection and automated operation. In particular, the introduction of artificial intelligence algorithms to construct damage detection models in combination with sensor array detection signals can effectively improve the accuracy of damage detection and identification, and significantly enhance the intelligence level of the detection system. The traditional manual measurement method and laser measurement technology are currently the main methods used for oil pipeline length measurement. Manual measurement methods have many drawbacks, such as low efficiency, high labor intensity, difficulty in ensuring measurement accuracy, and difficulties in intelligent data management. Although laser measurement technology has high measurement accuracy and easy to realize automated management of oil pipeline length measurement data, it is easily affected by large environmental interference and vibration, and its equipment and maintenance costs are high.

[0004] Therefore, there is an urgent need for an intelligent detection device and detection method for oil pipeline tripping to solve the above-mentioned defects and provide a more comprehensive technical solution for oil pipeline quality assessment. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned problems and provides an intelligent detection device and detection method for oil pipe lifting and lowering, so as to realize real-time detection of oil pipe status, reduce subsequent oil pipe maintenance work, and improve work efficiency; the present invention can promptly discover damaged oil pipes with safety hazards, ensure the integrity of the oil pipes, avoid engineering accidents caused by oil pipes not meeting requirements, reduce detection costs, and realize intelligent management of oil pipe detection data.

[0006] The present invention solves the above problems by adopting the following technical solutions:

[0007] An intelligent detection device for lifting and lowering oil pipes includes a cylindrical shell with a hollow interior, an oil pipe channel that passes through the cylindrical shell from top to bottom, the oil pipe channel and the cylindrical shell being concentric, a plurality of detection modules are evenly arranged around the oil pipe channel in the cylindrical shell, and a data acquisition control system is commonly connected to the plurality of detection modules; the plurality of detection modules have the same structure and include a bottom box with a hollow interior, a yoke and a pole shoe are arranged in the bottom box, a permanent magnet is commonly connected between the yoke and the pole shoe, a reserved opening is provided on the side of the bottom box close to the oil pipe channel, and a There are several Hall sensors evenly fixed in the bottom box, a radial telescopic spring is arranged between the other side of the bottom box away from the reserved opening and the inner wall of the cylindrical shell, support arms fixed on the side of the bottom box are arranged above and below the radial telescopic spring, sliding components connected to the support arms are arranged on the top and bottom surfaces inside the cylindrical shell, rotating arm components are connected to the two support arms, rollers in contact with the oil pipe are arranged on the rotating arm components, an encoder is connected to one of the rollers, and the Hall sensor and the encoder are both connected to the data acquisition and control system.

[0008] Preferably, the cylindrical shell includes an upper cover plate and a lower cover plate, which are spaced apart from each other and are both provided with concentric through holes. The oil pipe channel is concentric with the two through holes, and four arc-shaped plates are enclosed between the upper cover plate and the lower cover plate.

[0009] Preferably, two conical rubber sleeves are provided on the oil pipe channel, wherein one conical rubber sleeve is installed on the through hole of the upper cover plate, and the other conical rubber sleeve is installed on the through hole of the lower cover plate.

[0010] Preferably, connecting posts are connected to both ends of the radial telescopic spring, one of the connecting posts is vertically fixed on the side surface of the bottom box, and the other connecting post is vertically fixed on the inner wall surface of the cylindrical shell.

[0011] Preferably, the sliding assembly includes a guide rail fixed on the top surface or bottom surface inside the cylindrical shell, a slider is slidably connected to the guide rail, and the slider is fixedly connected to the end of the support arm.

[0012] Preferably, the guide rail includes a base, a guide slide rail is arranged on the upper part of the base, the guide slide rail is slidably connected to the slider, and radial limit blocks vertically installed on the base are arranged on both sides of the guide slide rail. The two radial limit blocks are in contact with the slider together and are both located on the side close to the oil pipe channel.

[0013] Preferably, the rotating arm assembly includes a rotating arm, a roller is installed on the end of the rotating arm close to the oil pipe channel, a screw is connected to the other end of the rotating arm and the support arm, a nut is threadedly connected to the screw to fasten the rotating arm and the support arm together, a fixing ring and a flange bearing are clamped on the screw between the rotating arm and the support arm, two connecting studs are threadedly connected to the fixing ring, axial telescopic springs are fixedly connected to the two connecting studs, the flange bearing makes the rotating arm rotate smoothly, a first stud is threadedly connected to the side of the rotating arm close to the support arm, and the two first studs are correspondingly connected to the two axial telescopic springs.

[0014] Preferably, two axial limit blocks are threadedly connected to the support arm, the rotating arm is located between the two axial limit blocks, and the two axial limit blocks cooperate to limit the rotation angle of the rotating arm.

[0015] Preferably, the data acquisition control system includes a data acquisition module and a host computer, a plurality of Hall sensors and encoders are connected to the data acquisition module, the data acquisition module is connected to the host computer, and an oil pipe detection model is built into the host computer.

[0016] A detection method for an intelligent detection device for tripping an oil pipe comprises the following steps:

[0017] S1. In the initial state, the radial telescopic spring is in a compressed state. Due to the elastic force of the radial telescopic spring, the detection module is pressed against the oil pipe channel.

[0018] S2: When the oil pipe enters from one end of the oil pipe channel and exits from the other end, several Hall sensors collect leakage magnetic field information at the damaged part of the oil pipe. The oil pipe drives the roller to rotate, so that the encoder connected to the roller collects the speed information of the oil pipe.

[0019] S3. When the coupling on the oil pipe passes through the oil pipe passage, the coupling, because its diameter is larger than that of the oil pipe, pushes the roller and the rotating arm to rotate axially, compressing the radial expansion spring of the detection module, thereby changing the size of the oil pipe passage and allowing the coupling to pass through the oil pipe passage. At this time, several Hall sensors jointly collect coupling signals, the coupling drives the roller to rotate, and the encoder continues to collect coupling speed information.

[0020] S4. After the coupling passes through the oil pipe channel, the radial expansion spring stretches, causing the detection module to pop out and reset to close to the oil pipe again;

[0021] S5, then repeating steps S1-S4 to continuously collect information about the oil pipeline;

[0022] S6. The data collected by the Hall sensors and the encoder are transmitted to the host computer through the data acquisition module. The host computer's oil pipe detection model combines the data collected by the Hall sensors to identify oil pipe damage, thereby obtaining oil pipe damage information. The oil pipe detection model combines the data collected by the Hall sensors to identify the coupling, and combines the data collected by the encoder to obtain the length information of the oil pipe.

[0023] S7. After the oil pipeline detection information is obtained, the oil pipeline information can be displayed intuitively in real time on the host computer interface, so that the user can understand the oil pipeline status in time; on the other hand, the oil pipeline detection information is stored and an oil pipeline detection database is constructed to realize intelligent oil pipeline detection.

[0024] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features:

[0025] The present invention can be used in conjunction with the tubing tripping process during well repair operations to achieve real-time detection of tubing conditions, thereby reducing subsequent tubing maintenance work and improving work efficiency. The system can also automatically adjust the size of the tubing channel detection space to accommodate tubing and couplings of varying diameters. The variable-diameter design of the detection module allows the Hall effect sensor and encoder to be in close proximity to the inspected tubing, providing high-quality detection data and a reliable basis for tubing damage analysis and maintenance. Furthermore, by real-time acquisition and uploading of detection data to a data acquisition and control system, a host computer processes, stores, and manages the collected information, and instantly and intuitively displays the tubing condition, including tubing damage and length information. This system can promptly identify damaged tubing that poses a safety hazard, safeguard tubing integrity, and avoid engineering accidents caused by non-compliant tubing. It can also reduce detection costs and achieve intelligent management of tubing detection data. The system not only overcomes the limitations of single-method tubing detection methods, namely, damage and length, but also improves overall detection efficiency through collaborative data analysis, providing a more comprehensive technical solution for tubing quality assessment. This is of great significance for the sustainable development of oil and gas fields and the safe and efficient production of oil and gas wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the main structure of the present invention Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the main structure of the present invention Figure 2 ;

[0028] Figure 3 yes Figure 2 Schematic diagram of a locally enlarged structure;

[0029] Figure 4 yes Figure 2 Schematic diagram of a locally enlarged structure;

[0030] In the figure: 11. Upper cover; 12. Arc plate; 13. Conical rubber sleeve; 2. Detection module; 201. Guide rail; 202. Slider; 203. Support arm; 204. Rotating arm; 205. Roller; 206. Encoder; 207. Axial limit block; 208. Radial telescopic spring; 209. Radial limit block; 210. Axial telescopic spring; 211. Bottom box; 212. Yoke; 213. Permanent magnet; 214. Pole shoe; 215. Hall sensor; 216. Screw; 217. Nut; 218. Fixing ring; 219. Connecting stud; 220. First stud; 221. Flange bearing; 31. Data acquisition module; 32. Host computer. DETAILED DESCRIPTION

[0031] The following description of the embodiments will help the public better understand the present invention, but the specific embodiments given by the applicant cannot and should not be regarded as limitations on the technical solutions of the present invention. Any changes to the definitions of components or technical features and / or formal rather than substantive changes to the overall structure should be regarded as the scope of protection defined by the technical solutions of the present invention.

[0032] See also Figures 1 to 4 As shown, the technical solution of the present invention is as follows:

[0033] An intelligent detection device for lifting and lowering oil pipes includes a cylindrical shell with a hollow interior. The cylindrical shell includes an upper cover plate 11 and a lower cover plate. The upper cover plate 11 and the lower cover plate are spaced apart from each other. Concentric through holes are machined on the upper cover plate 11 and the lower cover plate. Four arc-shaped plates 12 are fixedly enclosed between the upper cover plate 11 and the lower cover plate. An oil pipe channel is provided on the cylindrical shell. The oil pipe channel is a channel for the oil pipe to enter the device. The oil pipe channel is concentric with the cylindrical shell and the two through holes. Two conical rubber sleeves 13 are installed on the oil pipe, one of which is installed on the through hole of the upper cover plate 11, and the other is installed on the through hole of the lower cover plate. The two conical rubber sleeves 13 can play a buffering and guiding role, and remove dirt and gravel debris remaining on the surface of the oil pipe to prevent them from entering the internal space of the device. Four detection modules 2 are evenly arranged around the oil pipe channel in the cylindrical shell, and the four detection modules 2 are commonly connected to a data acquisition and control system;

[0034] The four detection modules 2 have the same structure and include a bottom box 211. The bottom box 211 is hollow inside, and a yoke 212 and a pole shoe 214 are fixed inside the bottom box 211. The yoke 212 and the pole shoe 214 are made of pure iron material with high magnetic permeability. A permanent magnet 213 is connected between the yoke 212 and the pole shoe 214. A reserved opening is processed on the side of the bottom box 211 close to the oil pipe channel. Two arc-shaped circuit boards are fixed in the bottom box 211. The two arc-shaped circuit boards are spaced apart and parallel to each other. A number of Hall sensors 215 are connected to the opposite sides of the two arc-shaped circuit boards. The several Hall sensors 215 are arranged in sequence along the arc direction of the arc circuit board, and the several Hall sensors 215 are all located at the reserved opening. The Hall sensors The number of sensors 215 is determined according to actual needs, wherein the yoke 212, the permanent magnet 213, and the pole shoe 214 form a magnetization module to realize the magnetization of the oil pipe, and together with the Hall sensor 215, realize the collection of oil pipe damage information; a radial telescopic spring 208 is arranged between the other side of the bottom box 211 away from the reserved opening and the inner wall surface of the cylindrical shell, and connecting columns are connected at both ends of the radial telescopic spring 208, one of the connecting columns is vertically fixed on the side of the bottom box 211, and the other connecting column is vertically fixed on the inner wall surface of the cylindrical shell, and the radial telescopic spring 208 plays the role of a telescopic detection module 2, and support arms 203 are arranged above and below the radial telescopic spring 208, and one end of the two support arms 203 is fixed to the side of the bottom box 211. On the surface, the support arm 203 and the bottom box 211 are mainly used to fix and connect other components, so that the device can maintain a relatively stable position even when facing vibration, impact or other external forces during operation. The other end of the support arm 203 located above the radial telescopic spring 208 extends to the top surface inside the cylindrical shell, and the other end of the support arm 203 located below the radial telescopic spring 208 extends to the bottom surface inside the cylindrical shell. Sliding components connected to the support arm 203 are provided on the top and bottom surfaces inside the cylindrical shell. The sliding component includes a guide rail 201, which is fixed to the top or bottom surface inside the cylindrical shell. A slider 202 is slidably connected to the guide rail 201, and the ends of the slider 202 and the support arm 203 are fixedly connected. The guide rail 201 and the slider 202 play the role of stabilizing the moving direction and preventing dislocation, so that the entire detection module 2 can move quickly and stably. The guide rail 201 includes a base, and a guide rail is fixed on the upper part of the base. The guide rail is slidably connected to the slider 202. Radial limit blocks 209 are set on both sides of the guide rail. The two radial limit blocks 209 are vertically installed on the base. The two radial limit blocks 209 are in contact with the slider 202 and are both located on the side close to the oil pipe channel. The two radial limit blocks 209 are used to limit the moving distance of the detection module 2 to prevent the detection module 2 from being ejected into the oil pipe channel by the radial telescopic spring 208, thereby blocking the passage space of the oil pipe channel. Rotating arm assemblies are connected to the two support arms 203.A roller 205 in contact with the oil pipe is provided on each rotating arm assembly. The rotating arm assembly includes a rotating arm 204. The roller 205 is installed on the end of the rotating arm 204 close to the oil pipe channel. A screw 216 is connected to the other end of the rotating arm 204 and the support arm 203. A nut 217 that fastens the rotating arm 204 and the support arm 203 together is threadedly connected to the screw 216. A fixing ring 218 and a flange bearing 221 are clamped on the screw 216 between the rotating arm 204 and the support arm 203. Two connecting studs 219 are threadedly connected to the fixing ring 218. An axial telescopic spring 210 is fixedly connected to the two connecting studs 219. The flange bearing 221 makes the rotating arm 204 rotate smoothly. A first stud 220 is threaded on the side of the rotating arm 204 close to the support arm 203. The two first studs 220 correspond to the two axial telescopic springs 210 The axial expansion spring 210 has the function of buffering the speed of rotation of the rotating arm 204 and resetting the rotating arm 204. Two axial limit blocks 207 are threadedly connected to the support arm 203. The rotating arm 204 is located between the two axial limit blocks 207. The two axial limit blocks 207 work together to limit the rotation angle of the rotating arm 204, thereby preventing damage to other components caused by excessive angles. An encoder 206 is connected to one of the rollers 205. The roller 205 is a rubber-coated roller with a buffering effect. The encoder 206 is connected to the roller 205 and uses the friction of the oil pipe passing through the oil pipe channel to drive the roller 205 to rotate. The encoder 206 outputs a pulse signal, which is transmitted to the data acquisition and control system and converted into the speed and length information of the oil pipe. Therefore, the roller 205 and the encoder 206 are combined to realize the acquisition of oil pipe length information. The Hall sensor 215 and the encoder 206 are both connected to the data acquisition and control system.

[0035] The data acquisition control system includes a data acquisition module 31 and a host computer 32. The data acquisition module 31 mainly plays the role of control signal acquisition, processing and transmission. The host computer 32 is mainly used to receive the data transmitted by the data acquisition module 31 and analyze, process, store and manage the relevant oil pipeline information data. Several Hall sensors 215 and encoders 206 are connected to the data acquisition module 31, and the data acquisition module 31 is connected to the host computer 32. The host computer 32 has a built-in oil pipeline detection model to realize intelligent oil pipeline detection.

[0036] It should be noted that under the action of the permanent magnet 213, the yoke 212 and the pole shoe 214 form a magnetic path with the oil pipe, magnetizing the oil pipe to a saturated or near-saturated state. If the oil pipe is damaged by cracks, corrosion, or wear, the distribution of the magnetic path will be affected, thereby causing the magnetic field distribution at the damaged location to change and generating a leakage magnetic field. The leakage magnetic field information at the damaged location of the oil pipe is collected by the Hall sensor 215 and processed by the data acquisition and control system to determine the damage to the oil pipe. At the same time, when a coupling on the oil pipe passes through, significant magnetic field information can also be collected to identify whether the coupling has passed.

[0037] Under the action of the rotating arm 204, the axial limit block 207, the radial telescopic spring 208, the radial limit block 209, and the axial telescopic spring 210, the detection module 2 is always in contact with the surface of the oil pipe and the coupling, ensuring that the Hall sensor 215 collects the leakage magnetic field information at the damaged part of the oil pipe under the same lift-off value, and the roller 205 fully contacts and rotates with the oil pipe and the coupling to ensure the accuracy of the collected information.

[0038] A detection method for an intelligent detection device for tripping an oil pipe comprises the following steps:

[0039] S1. In the initial state, the radial telescopic spring 208 is in a compressed state. Due to the elastic force of the radial telescopic spring 208, the detection module 2 is pressed against the oil pipe channel.

[0040] S2. When the oil pipe enters from one end of the oil pipe channel and exits from the other end, several Hall sensors 215 collect leakage magnetic field information at the damaged part of the oil pipe. The oil pipe drives the roller 205 to rotate, so that the encoder 206 connected to the roller 205 collects the speed information of the oil pipe.

[0041] S3. When the coupling on the oil pipe passes through the oil pipe passage, since the diameter of the coupling is larger than that of the oil pipe, the coupling pushes the roller 205 and the rotating arm 204 to rotate axially, compressing the radial expansion spring 208 of the detection module 2, thereby changing the size of the oil pipe passage, allowing the coupling to pass through the oil pipe passage. At this time, multiple Hall sensors 215 jointly collect coupling signals, the coupling drives the roller 205 to rotate, and the encoder 206 continues to collect coupling speed information.

[0042] S4. After the coupling passes through the oil pipe passage, the radial expansion spring 208 expands, causing the detection module 2 to pop out and reset to close to the oil pipe again;

[0043] S5, then repeating steps S1-S4 to continuously collect information about the oil pipeline;

[0044] S6. The data collected by the Hall sensors 215 and the encoder 206 are transmitted to the host computer 32 via the data acquisition module 31. The oil pipe detection model of the host computer 32 combines the data collected by the Hall sensors 215 to identify oil pipe damage and obtain oil pipe damage information. The oil pipe detection model combines the data collected by the Hall sensors 215 to identify the coupling and combines the data collected by the encoder 206 to obtain the length information of the oil pipe.

[0045] S7. After the oil pipeline detection information is obtained, the oil pipeline information can be displayed in real time and intuitively on the upper computer 32 interface, so that the user can understand the oil pipeline status in time; on the other hand, the oil pipeline detection information is stored and an oil pipeline detection database is constructed to realize intelligent oil pipeline detection.

[0046] The present invention can be used in conjunction with the tubing tripping process during well repair operations to achieve real-time detection of tubing conditions, thereby reducing subsequent tubing maintenance work and improving work efficiency. The present invention can also automatically adjust the size of the tubing channel detection space to accommodate tubing and couplings of varying diameters. The variable diameter design of the detection module 2 places the Hall sensor 215 and encoder 206 in close proximity to the tubing being inspected, providing high-quality detection data and a reliable basis for tubing damage analysis and maintenance. Furthermore, by real-time acquisition and uploading of detection data to a data acquisition and control system, the host computer 32 processes, stores, and manages the collected information, and instantly and intuitively displays the tubing condition, including tubing damage information and tubing length information. This allows for the timely detection of damaged tubing posing safety hazards, ensuring tubing integrity and avoiding engineering accidents caused by non-compliant tubing. Furthermore, it can reduce detection costs and achieve intelligent management of tubing detection data. The present invention not only overcomes the limitations of single tubing detection methods, namely, damage and length, but also improves overall detection efficiency through collaborative data analysis, providing a more comprehensive technical solution for tubing quality assessment. This is of great significance for the sustainable development of oil and gas fields and the safe and efficient production of oil and gas wells.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. Any equivalent changes made using the contents of the present invention specification and its drawings are included in the scope of the present invention.

Claims

1. An intelligent detection device for tripping and running oil pipes, characterized by: The invention comprises a cylindrical shell with a hollow interior, an oil pipe passage which passes through the cylindrical shell from top to bottom, the oil pipe passage being concentric with the cylindrical shell, a plurality of detection modules being evenly arranged around the oil pipe passage in the cylindrical shell, and a data acquisition control system being commonly connected to the plurality of detection modules; the plurality of detection modules have the same structure and comprise a bottom box with a hollow interior, a yoke and a pole shoe being arranged in the bottom box, a permanent magnet being commonly connected between the yoke and the pole shoe, a reserved opening being arranged on the side of the bottom box close to the oil pipe passage, and a plurality of A Hall sensor is evenly fixed in the bottom box, a radial telescopic spring is arranged between the other side of the bottom box away from the reserved opening and the inner wall of the cylindrical shell, support arms fixed on the side of the bottom box are arranged above and below the radial telescopic spring, sliding components connected to the support arms are arranged on the top and bottom surfaces inside the cylindrical shell, rotating arm components are connected to the two support arms, rollers in contact with the oil pipe are arranged on the rotating arm components, an encoder is connected to one of the rollers, and the Hall sensor and the encoder are connected to the data acquisition The control system is connected; the sliding assembly includes a guide rail, which is fixed on the top surface or bottom surface inside the cylindrical shell, and a slider is slidably connected to the guide rail, and the slider is fixedly connected to the end of the support arm; the guide rail includes a base, a guide rail is provided on the upper part of the base, the guide rail is slidably connected to the slider, and radial limit blocks vertically mounted on the base are provided on both sides of the guide rail, and the two radial limit blocks are in contact with the slider and are both located on the side close to the oil pipe channel; the rotating arm assembly includes a rotating arm, a roller is installed on the end of the rotating arm close to the oil pipe channel, and a screw is commonly connected to the other end of the rotating arm and the support arm, and a nut is threadedly connected to the screw to fasten the rotating arm and the support arm together, a fixing ring and a flange bearing are clamped on the screw between the rotating arm and the support arm, two connecting studs are threaded on the fixing ring, and axial telescopic springs are fixedly connected to the two connecting studs, and the flange bearing makes the rotating arm rotate smoothly, and a first stud is threaded on the side of the rotating arm close to the support arm, and the two first studs are correspondingly connected to the two axial telescopic springs.

2. The intelligent detection device for oil pipe tripping according to claim 1, characterized in that: The cylindrical shell includes an upper cover plate and a lower cover plate, which are spaced apart from each other and are both provided with concentric through holes. The oil pipe channel is concentric with the two through holes, and four arc plates are enclosed between the upper cover plate and the lower cover plate.

3. The intelligent detection device for oil pipe tripping according to claim 2, characterized in that: Two conical rubber sleeves are arranged on the oil pipe channel, one of which is installed on the through hole of the upper cover plate, and the other is installed on the through hole of the lower cover plate.

4. The intelligent detection device for oil pipe tripping according to claim 3 is characterized in that: Connecting columns are connected to both ends of the radial telescopic spring, one of which is vertically fixed on the side surface of the bottom box, and the other is vertically fixed on the inner wall surface of the cylindrical shell.

5. The intelligent detection device for oil pipe tripping according to claim 1, characterized in that: Two axial limit blocks are threadedly connected to the support arm, and the rotating arm is located between the two axial limit blocks. The two axial limit blocks cooperate with each other to limit the rotation angle of the rotating arm.

6. The intelligent detection device for oil pipe tripping according to claim 5, characterized in that: The data acquisition control system includes a data acquisition module and a host computer. Several Hall sensors and encoders are connected to the data acquisition module. The data acquisition module is connected to the host computer. An oil pipe detection model is built into the host computer.

7. A detection method according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. In the initial state, the radial telescopic spring is in a compressed state. Due to the elastic force of the radial telescopic spring, the detection module is pressed against the oil pipe channel. S2: When the oil pipe enters from one end of the oil pipe channel and exits from the other end, several Hall sensors collect leakage magnetic field information at the damaged part of the oil pipe. The oil pipe drives the roller to rotate, so that the encoder connected to the roller collects the speed information of the oil pipe. S3. When the coupling on the oil pipe passes through the oil pipe passage, the coupling, because its diameter is larger than that of the oil pipe, pushes the roller and the rotating arm to rotate axially, compressing the radial expansion spring of the detection module, thereby changing the size of the oil pipe passage and allowing the coupling to pass through the oil pipe passage. At this time, several Hall sensors jointly collect coupling signals, the coupling drives the roller to rotate, and the encoder continues to collect coupling speed information. S4. After the coupling passes through the oil pipe channel, the radial expansion spring stretches, causing the detection module to pop out and reset to close to the oil pipe again; S5, then repeating steps S1-S4 to continuously collect information about the oil pipeline; S6. The data collected by the Hall sensors and the encoder are transmitted to the host computer through the data acquisition module. The host computer's oil pipe detection model combines the data collected by the Hall sensors to identify oil pipe damage, thereby obtaining oil pipe damage information. The oil pipe detection model combines the data collected by the Hall sensors to identify the coupling, and combines the data collected by the encoder to obtain the length information of the oil pipe. S7. After the oil pipeline detection information is obtained, the oil pipeline information can be displayed intuitively in real time on the host computer interface, so that the user can understand the oil pipeline status in time; on the other hand, the oil pipeline detection information is stored and an oil pipeline detection database is constructed to realize intelligent oil pipeline detection.

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