An online detection device for stress distortion of multi-size coiled tubing

Abstract

The present invention relates to an online detection device for stress distortion of multi-size continuous oil pipes, belonging to the field of continuous oil pipe defect detection. The online detection device comprises a box and a data acquisition and analysis module, wherein a speed displacement detection device, a magnetic signal detection device and a wall thickness ovality detection device electrically connected to the data acquisition and analysis module are arranged in the box; the speed displacement detection device detects the movement speed and displacement of the continuous oil pipe; the magnetic signal detection device detects the stress distortion area of ​​the continuous oil pipe; the wall thickness ovality detection device detects the ovality and wall thickness of the continuous oil pipe; the online detection device can understand the performance status of the continuous oil pipe, provide a scientific basis for analyzing the failure and scrapping of the continuous oil pipe, ensure the safety of the continuous oil pipe operation, reduce the use and maintenance costs, and solve the problems that the existing continuous oil pipe stress distortion detection methods mostly rely on manual inspection or shutdown detection, and have low detection efficiency, poor accuracy, and great impact on production.

Description

Technical Field

[0001] The invention belongs to the field of continuous oil pipe defect detection, and in particular relates to an online detection device for stress distortion of continuous oil pipes of multiple sizes. Background Art

[0002] Coiled tubing (CT) is a jointless continuous pipe with a length of several hundred to several thousand meters, which is made of many flexible pipes of hundreds of meters, welded by butt welding or bias welding. It has the advantages of small diameter, good flexibility, low cost, high efficiency, saving operation time, and reducing formation damage. It is currently widely used in oil and gas field workover, drilling, completion, logging, oil production, gathering and production increase operations. Under the combined action of complex loads such as high pressure, frequent bending-straightening, and axial tension, the coiled tubing is prone to early micro fatigue plastic deformation, forming a stress distortion area. As the plastic deformation continues to accumulate, it eventually leads to sudden failure of the coiled tubing. Therefore, by accurately detecting and identifying the stress distortion area, the failure risk of the coiled tubing is discovered in the early stage of fatigue damage, providing support for the prediction of the remaining life of the coiled tubing and the use decision-making, which is of great significance for further improving the accuracy of the prediction of the remaining life of the coiled tubing, ensuring the safety of the coiled tubing operation, and reducing the use and maintenance costs.

[0003] At present, there is still a lack of an online detection device suitable for stress distortion of multi-size continuous tubing at home and abroad. Existing detection methods mostly rely on manual inspection or shutdown detection, which has problems such as low detection efficiency, poor accuracy, and great impact on production. In addition, although some foreign companies provide online detection services for continuous tubing, the service price is expensive, and the equipment is not sold to the outside world, which is difficult to meet the actual needs of the domestic market. Summary of the invention

[0004] Based on the problems existing in the above-mentioned background technology, the present invention proposes an online detection device for stress distortion of multi-size coiled tubings, which solves the problems that the existing coiled tubing stress distortion detection methods mostly rely on manual inspections or shutdown inspections, and have low detection efficiency, poor accuracy, and great impact on production.

[0005] The embodiment of the present invention is achieved as follows:

[0006] The embodiment of the present invention provides an online stress and distortion detection device for multi-size coiled tubing, which comprises a box and a data acquisition and analysis module. The two side surfaces of the box in the width direction are respectively provided with a tubing inlet and a tubing outlet for the coiled tubing to be detected to pass through; a velocity displacement detection device, a magnetic signal detection device and a wall thickness ovality detection device electrically connected to the data acquisition and analysis module are sequentially arranged in the box along the length direction of the line connecting the tubing inlet and the tubing outlet;

[0007] The speed and displacement detection device is used to detect the movement speed and displacement of the coiled tubing to be detected and transmit the detected movement speed and displacement to the data acquisition and analysis module;

[0008] The magnetic signal detection device comprises a magnetization module and a detection module, wherein the detection module comprises a probe installation tube in a circular cylindrical structure, wherein the interior of the probe installation tube is for the coiled tubing to be detected to pass through, and the probe installation tube is provided with a plurality of magnetic signal detection probes electrically connected to the data acquisition and analysis module; the detection module comprises two high-uniformity electromagnetic cores arranged on both axial sides of the probe installation tube, wherein the two high-uniformity electromagnetic cores are respectively located on both sides of the radial direction of the coiled tubing to be detected;

[0009] The wall thickness ovality detection device is used to detect the ovality and wall thickness of the coiled tubing to be detected and transmit the detected movement speed and displacement to the data acquisition and analysis module.

[0010] The basic principle of the online stress distortion detection device for multi-size continuous oil pipes in the present invention is as follows: when stress distortion detection is required for the continuous oil pipe to be detected, firstly, one end of the continuous oil pipe to be detected is passed through the oil pipe inlet into the speed displacement detection device, the magnetic signal detection device and the wall thickness ovality detection device, wherein the speed displacement detection device detects the movement speed and displacement of the continuous oil pipe to be detected, the magnetic signal detection device performs accurate online detection and identification of the stress distortion area of ​​the continuous oil pipe to be detected, and the wall thickness ovality detection device detects the ovality and wall thickness of the continuous oil pipe to be detected, so that the user can understand the performance status of the continuous oil pipe most intuitively, provide a scientific basis for analyzing the failure and scrapping of the continuous oil pipe, ensure the safety of the continuous oil pipe operation, reduce the use and maintenance costs, and solve the problems that the existing continuous oil pipe stress distortion detection methods mostly rely on manual inspection or shutdown detection, and have low detection efficiency, poor accuracy, and great impact on production.

[0011] As an optional solution of the above embodiment, a plurality of mounting grooves are circumferentially arranged on the probe mounting tube, the length direction of each mounting groove is oriented in the radial direction of the probe mounting tube, a cover plate is arranged at the tail end of each mounting groove, and a limiting boss is arranged at the head end of the mounting groove;

[0012] A probe rack is slidably arranged in each mounting groove, and a limit block in contact with the limit boss is arranged at the tail end of each probe rack, and a first cylindrical spring is arranged between the tail end of the probe rack and the cover plate; the head end of the probe rack passes through the mounting groove and is located inside the probe mounting tube, and a magnetic signal detection probe and a top wire steel ball are installed at the head end of the probe rack; the outer contour of the top wire steel ball contacts the outer wall of the continuous oil pipe to be detected, and a spacing is arranged between the magnetic signal detection probe and the outer wall of the continuous oil pipe to be detected. The probe rack is slidably arranged in the mounting groove, which can not only adapt to the continuous oil pipes to be detected with different outer diameters, but also, due to the arrangement of the first cylindrical spring, the top wire steel column on the head end of the probe rack can always contact the outer wall of the continuous oil pipe to be detected, and a spacing is arranged between the magnetic signal detection probe and the outer wall of the continuous oil pipe to be detected, so that the magnetic signal detection probe and the continuous oil pipe to be detected maintain a compact distance under the premise of safety, so that the detection result is more accurate. The limit boss and the limit block can limit the maximum displacement of the probe rack moving toward the probe mounting tube to prevent the probe rack from sliding out of the mounting groove. At the same time, the magnetic signal detection probe is arranged at the head end of the probe frame and is located inside the probe installation tube, so that the magnetic signal detection probe can be free from interference from external factors such as oil, sludge, etc. The setting of the cover plate can fix the entire probe frame in the installation slot and the cover plate can be made of signal shielding material to play the role of shielding the signal and prevent the magnetic signal detection probe from being interfered by external factors and affecting the detection accuracy.

[0013] As an optional solution of the above embodiment, the probe mounting tube is provided with 18 mounting grooves in an annular direction, and the 18 mounting grooves are evenly divided into 3 groups, and the 3 groups of mounting grooves are evenly arranged along the length direction of the probe mounting tube; the 6 mounting grooves in each group are evenly arranged in an annular direction with the axis of the probe mounting tube as the center; the phase difference between two adjacent groups of mounting grooves is 20°. The above arrangement enables the magnetic signal detection probes to be staggered on the probe mounting tube, which can completely cover the surface of the continuous oil pipe to be detected with different diameters, and the magnetic signal detection probe covers the entire surface and has an accurate detection effect.

[0014] As an optional solution of the above embodiment, the speed displacement detection device includes two symmetrically spaced mounting platforms, the two mounting platforms are arranged in the box body and close to the oil pipe inlet; the coiled oil pipe to be detected is located between the two mounting platforms;

[0015] A sliding column is slidably connected in each mounting platform, a second cylindrical spring is arranged between the tail end of the sliding column and the mounting platform, a U-shaped block is arranged at the head end of the sliding column, a speed measuring wheel for contacting the outer wall of the coiled tubing to be tested is arranged in the U-shaped block through the rotation of the rotating shaft, and the speed measuring wheel is fixedly connected to the rotating shaft;

[0016] The sliding column is slidably connected to the mounting platform, and the distance between the two speed measuring wheels can be adjusted to adapt to the detection of continuous oil pipes with different diameters.

[0017] A mounting bracket is provided on one side of each mounting platform, and a slide groove and an encoder electrically connected to the data acquisition and analysis module are provided on the mounting bracket, and a slide plate slidably matched with the slide groove is provided on the encoder, and the input shaft of the encoder is fixedly connected to the rotating shaft through a connecting shaft; the sliding direction of the encoder is in the same direction as the sliding direction of the slide column.

[0018] When the speed displacement detection device detects the movement speed and displacement of the coiled tubing to be detected, the coiled tubing to be detected is located between two mounting platforms, and the second cylindrical spring pushes the sliding column to move toward the direction of the coiled tubing to be detected until the speed measuring wheel on the U-shaped block contacts the outer wall of the coiled tubing to be detected, and the moving coiled tubing to be detected drives the speed measuring wheel to rotate, and the rotating speed measuring wheel drives the encoder to rotate through the rotating shaft and the connecting shaft, and the encoder obtains the movement speed and displacement of the coiled tubing to be detected. At the same time, the encoder can slide on the mounting bracket through the slide plate, so that the encoder moves in the vertical direction following the speed measuring wheel.

[0019] As an optional solution of the above embodiment, the wall thickness ovality detection device includes a probe seat arranged in the box and close to the oil pipe outlet, the probe seat is provided with a channel for the continuous oil pipe to be detected to pass through, and the probe seat is provided with a plurality of electromagnetic ultrasonic thickness measuring probes and laser profile probes electrically connected to the data acquisition and analysis module.

[0020] As an optional solution to the above embodiment, the probe seat is a hollow cylindrical structure with a regular hexagonal cross-section, and an electromagnetic ultrasonic thickness measuring probe and a laser contour probe are arranged through each side wall of the probe seat, and the detection ends of each electromagnetic ultrasonic thickness measuring probe and laser contour probe are located inside the probe seat.

[0021] As an optional solution of the above embodiment, a refrigeration device is provided in the box, and the refrigeration device includes a plurality of fans arranged around the two high uniformity electromagnetic cores. The fans are used to cool the high uniformity electromagnetic cores to prevent the high uniformity electromagnetic cores from overheating and affecting the working conditions, thereby ensuring the detection accuracy.

[0022] As an optional solution of the above embodiment, the box body includes an upper box body and a lower box body, one side of the upper box body and the lower box body are hinged by a hinge, and a handle is provided on the top of the upper box body; the oil pipe inlet and the oil pipe outlet are respectively provided on the side surfaces of the upper box body and the lower box body.

[0023] The box body is arranged as an upper box body and a lower box body that cooperate with each other, so that the box body is more convenient to open, and it is also convenient for the installation and subsequent maintenance of the speed displacement detection device, the magnetic signal detection device and the wall thickness ovality detection device; the setting of the handle can facilitate the carrying and picking up of the entire online detection device for stress distortion of multi-size continuous oil pipes.

[0024] As an optional solution of the above embodiment, a display module electrically connected to the data acquisition and analysis module is provided on the box. The display module can be a display, which can intuitively display the movement speed, displacement, stress distortion, ovality and wall thickness of the coiled tubing to be tested, so that the operator can directly view the test results, and the operator can analyze the failure and scrapping of the coiled tubing according to the test results.

[0025] As an optional solution to the above embodiment, a plurality of heat dissipation holes are provided on the four side walls of the box body. The provision of the heat dissipation holes increases the heat dissipation area of ​​the box body surface and performs convection exchange with the external air, thereby helping the online detection device to reduce the internal temperature so as to maintain the normal operating temperature of the online detection device.

[0026] The beneficial effects of the present invention are as follows: 1. The present invention provides an online detection device for stress distortion of multi-size coiled tubings, which can perform online detection during the operation of the coiled tubing without stopping the machine, thus greatly shortening the detection time and improving the detection efficiency.

[0027] 2. The present invention provides an online detection device for stress distortion of coiled tubings of various sizes, which can meet the detection requirements of coiled tubings of different diameters.

[0028] 3. The present invention provides an online stress distortion detection device for multi-size coiled tubings, which can monitor and warn the stress distortion of coiled tubings in real time, timely discover potential safety hazards, and has a high degree of automation, reducing manual intervention and human errors.

[0029] 4. The present invention provides an online detection device for stress distortion of multi-size continuous oil pipes. The magnetic signal detection probes are staggeredly distributed on the probe mounting tube, which can completely cover the surface of the continuous oil pipes to be detected with different diameters. The magnetic signal detection probes have complete coverage and accurate detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. As shown in the accompanying drawings, the above and other purposes, features and advantages of the present invention will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0031] Figure 1It is a schematic diagram of the internal structure of an online detection device for stress distortion of multi-size coiled tubings according to the present invention;

[0032] Figure 2 Schematic diagram of the three-dimensional structure of the detection module;

[0033] Figure 3 It is a schematic diagram of the cross-sectional structure of the detection module.

[0034] Figure 4 It is a structural schematic diagram of the speed displacement detection device.

[0035] Figure 5 It is a schematic diagram of the cross-sectional structure of the speed displacement detection device.

[0036] Figure 6 It is a schematic diagram of the three-dimensional structure of the wall thickness ovality detection device.

[0037] Among them, 1, box body; 101, upper box body; 102, lower box body; 103, handle; 2, oil pipe inlet; 3, oil pipe outlet; 4, speed displacement detection device; 401, mounting table; 402, slide column; 403, second cylindrical spring; 404, U-shaped block; 405, speed measuring wheel; 406, mounting bracket; 407, slide groove; 408, encoder; 409, slide plate; 410, connecting shaft; 5, magnetic signal detection device; 51, magnetization module; 511, high average Electromagnetic core for uniformity measurement; 52, detection module; 521, probe mounting tube; 522, magnetic signal detection probe; 523, mounting groove; 524, cover plate; 525, limiting boss; 526, probe holder; 527, limiting block; 528, first cylindrical spring; 529, top wire steel ball; 6, wall thickness ovality detection device; 601, probe holder; 602, electromagnetic ultrasonic thickness measuring probe; 603, laser contour probe; 7, fan; 8, heat dissipation hole; 9, continuous oil pipe to be detected. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0042] First embodiment:

[0043] Please refer to Figure 1 and Figure 2 As shown, the first embodiment of the present invention provides an online stress and distortion detection device for multi-size coiled tubing, which includes a box body 1 and a data acquisition and analysis module. The box body 1 is provided with a tubing inlet 2 and a tubing outlet 3 for the coiled tubing 9 to be detected to pass through on both sides of the width direction respectively; a velocity displacement detection device 4, a magnetic signal detection device 5 and a wall thickness ellipticity detection device 6 electrically connected to the data acquisition and analysis module are sequentially arranged in the box body 1 along the length direction of the line connecting the tubing inlet 2 and the tubing outlet 3;

[0044] The speed and displacement detection device 4 is used to detect the movement speed and displacement of the coiled tubing 9 to be detected and transmit the detected movement speed and displacement to the data acquisition and analysis module;

[0045] The magnetic signal detection device 5 includes a magnetization module 51 and a detection module 52. The detection module 52 includes a probe installation tube 521 in a circular cylindrical structure. The interior of the probe installation tube 521 is for the coiled tubing 9 to be detected to pass through. The probe installation tube 521 is provided with a plurality of magnetic signal detection probes 522 electrically connected to the data acquisition and analysis module. The detection module 52 includes two high-uniformity electromagnetic cores 511 arranged on both sides of the axial direction of the probe installation tube 521. The two high-uniformity electromagnetic cores 511 are respectively located on both sides of the radial direction of the coiled tubing 9 to be detected.

[0046] The wall thickness ovality detection device 6 is used to detect the ovality and wall thickness of the coiled tubing 9 to be detected and transmit the detected movement speed and displacement to the data acquisition and analysis module.

[0047] When stress distortion detection is required for the coiled tubing 9 to be detected, firstly, one end of the coiled tubing 9 to be detected is passed through the tubing inlet 2 into the speed displacement detection device 4, the magnetic signal detection device 5 and the wall thickness ovality detection device 6, wherein the speed displacement detection device 4 detects the movement speed and displacement of the coiled tubing 9 to be detected, the magnetic signal detection device 5 performs accurate online detection and identification of the stress distortion area of ​​the coiled tubing 9 to be detected, and the wall thickness ovality detection device 6 detects the ovality and wall thickness of the coiled tubing 9 to be detected, so that the user can understand the performance status of the coiled tubing most intuitively, provide a scientific basis for analyzing the failure and scrapping of the coiled tubing, ensure the safety of the coiled tubing operation, reduce the use and maintenance costs, and perform online detection during the operation of the coiled tubing without stopping the machine, which can greatly shorten the detection time and improve the detection efficiency, and solve the problems that the existing coiled tubing stress distortion detection methods mostly rely on manual inspection or shutdown detection, and have low detection efficiency, poor accuracy, and great impact on production.

[0048] The working principle of the magnetic signal detection device 5 is as follows: when the coiled tubing to be tested passes through the magnetic signal detection device 5, first, the coiled tubing to be tested is partially surrounded by a constant magnetic field generated by the high uniformity flux magnetic core 511 uniformly surrounding it. When there are defects on the inner and outer surfaces of the coiled tubing to be tested, the magnetic permeability of the defect is very small and the magnetic resistance is very large, which will cause the magnetic flux in the magnetic circuit to be distorted, and the flow direction of the magnetic induction line will change. In addition to part of the magnetic flux directly passing through the defect or bypassing the defect through the inside of the pipe wall material, part of the magnetic flux will leak to the air above the surface of the coiled tubing to be tested, bypass the defect through the air and re-enter the wall of the coiled tubing to be tested, thereby forming a leakage magnetic field at the defect on the surface of the coiled tubing to be tested. At the same time, combined with the force-magnetic coupling magnetization model, the magnetic field distribution forward model, the pattern matching algorithm and the iterative reconstruction algorithm, a stress distortion area recognition, classification and contour reconstruction method based on multi-channel and multi-feature parameters is constructed to achieve accurate evaluation and early warning of stress distortion areas. The multiple magnetic signal detection probes 522 in the magnetic signal detection device 5 can accurately collect the leakage magnetic field signal on the surface of the oil pipe, and realize the detection of defects and stress distortion areas of the coiled oil pipe string to be tested.

[0049] As an optional solution of the above embodiment, a refrigeration device is provided in the box 1, and the refrigeration device includes a plurality of fans 7 arranged around the two high uniformity electromagnetic cores 511. The fans 7 are used to cool down the high uniformity electromagnetic cores 511 to prevent the high uniformity electromagnetic cores 511 from overheating and affecting the working conditions, thereby ensuring the detection accuracy.

[0050] In this embodiment, the selection of the magnetic signal detection probe 522 and the high uniformity magnetic core 511 and their internal structures are all prior art, and the working principle of each component and the specific connection relationship between the components are not specifically described here.

[0051] Second embodiment:

[0052] like Figure 2 and Figure 3 As shown, the second embodiment of the present invention provides an online detection device for stress distortion of multi-size continuous oil pipes. The online detection device is further limited on the basis of the first embodiment. The improvement lies in how to specifically set the detection module 52. For other parts not mentioned, please refer to the first embodiment or the prior art.

[0053] like Figure 2 and Figure 3 As shown, specifically, the probe mounting tube 521 is circumferentially provided with a plurality of mounting grooves 523, the length direction of each mounting groove 523 is oriented toward the radial direction of the probe mounting tube 521, a cover plate 524 is provided at the tail end of each mounting groove 523, and a limiting boss 525 is provided at the head end of the mounting groove 523;

[0054] A probe frame 526 is slidably arranged in each mounting groove 523, and a limit block 527 in contact with the limit boss 525 is arranged at the rear end of each probe frame 526, and a first cylindrical spring 528 is arranged between the rear end of the probe frame 526 and the cover plate 524; the head end of the probe frame 526 passes through the mounting groove 523 and is located inside the probe mounting tube 521, and a magnetic signal detection probe 522 and a top wire steel ball 529 are installed at the head end of the probe frame 526; the outer contour of the top wire steel ball 529 is in contact with the outer wall of the continuous oil pipe 9 to be detected, and a distance is arranged between the magnetic signal detection probe 522 and the outer wall of the continuous oil pipe 9 to be detected. The probe frame 526 is slidably arranged in the mounting groove 523, which can not only adapt to the coiled tubing 9 to be detected with different outer diameters, but also, due to the arrangement of the first cylindrical spring 528, the top wire steel column on the head end of the probe frame 526 can always contact the outer wall of the coiled tubing 9 to be detected, and a spacing is arranged between the magnetic signal detection probe 522 and the outer wall of the coiled tubing 9 to be detected, so that the magnetic signal detection probe 522 and the coiled tubing to be detected maintain a compact distance under the premise of safety, so that the detection result is more accurate. The limiting boss 525 and the limiting block 527 can limit the maximum displacement of the probe frame 526 moving toward the probe mounting tube 521, and prevent the probe frame 526 from sliding out of the mounting groove 523. At the same time, the magnetic signal detection probe 522 is arranged at the head end of the probe frame 526 and is located inside the probe mounting tube 521, so that the magnetic signal detection probe 522 is free from interference from external factors such as oil stains and sludge. The setting of the cover plate 524 can fix the entire probe frame 526 in the installation groove 523, and the cover plate 524 can be made of signal shielding material to play a role in shielding signals, thereby preventing the magnetic signal detection probe 522 from being interfered by external factors and affecting the detection accuracy.

[0055] As an optional solution of the above embodiment, the probe installation tube 521 is provided with 18 installation grooves 523 in an annular direction, and the 18 installation grooves 523 are evenly divided into 3 groups, and the 3 groups of installation grooves 523 are evenly arranged along the length direction of the probe installation tube 521; the 6 installation grooves 523 in each group are evenly arranged in an annular direction with the axis of the probe installation tube 521 as the center; the phase difference between two adjacent groups of installation grooves 523 is 20°. The above arrangement enables the magnetic signal detection probes 522 to be staggeredly distributed on the probe installation tube 521, which can completely cover the surface of the coiled tubing 9 to be detected with different diameters, and the magnetic signal detection probes 522 cover the entire surface and the detection effect is accurate.

[0056] For structures not mentioned in this embodiment, reference may be made to the prior art or the first embodiment.

[0057] Third embodiment:

[0058] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the third embodiment of the present invention provides an online detection device for stress distortion of multi-size continuous oil pipes. The online detection device is further limited on the basis of the second embodiment. The improvement lies in how to specifically set the velocity displacement detection device 4 and the wall thickness ovality detection device 6. For other parts not mentioned, please refer to the first and second embodiments or the prior art.

[0059] like Figure 4 and Figure 5 As shown, the speed displacement detection device 4 includes two symmetrically spaced mounting platforms 401 , which are arranged in the housing 1 and close to the oil pipe inlet 2 ; the coiled oil pipe 9 to be detected is located between the two mounting platforms 401 .

[0060] A sliding column 402 is slidably connected in each mounting platform 401, a second cylindrical spring 403 is arranged between the tail end of the sliding column 402 and the mounting platform 401, a U-shaped block 404 is arranged at the head end of the sliding column 402, and a speed measuring wheel 405 for contacting the outer wall of the coiled tubing 9 to be tested is arranged in the U-shaped block 404 through the rotation of the rotating shaft, and the speed measuring wheel 405 is fixedly connected to the rotating shaft.

[0061] The sliding column 402 is slidably connected to the mounting platform 401, and the distance between the two speed measuring wheels 405 can be adjusted to adapt to the detection coiled tubing with different diameters.

[0062] A mounting bracket 406 is provided on one side of each mounting platform 401, and a slide groove 407 and an encoder 408 electrically connected to the data acquisition and analysis module are provided on the mounting bracket 406, and a slide plate 409 slidably matched with the slide groove 407 is provided on the encoder 408, and the input shaft of the encoder 408 is fixedly connected to the rotating shaft through a connecting shaft 410; the sliding direction of the encoder 408 is the same as the sliding direction of the sliding column 402.

[0063] When the speed displacement detection device 4 detects the movement speed and displacement of the coiled tubing 9 to be detected, the coiled tubing 9 to be detected is located between the two mounting platforms 401, and the second cylindrical spring 403 pushes the sliding column 402 to move toward the coiled tubing 9 to be detected until the speed measuring wheel 405 on the U-shaped block 404 is in clamping contact with the outer wall of the coiled tubing 9 to be detected, and the moving coiled tubing 9 to be detected drives the speed measuring wheel 405 to rotate, and the rotating speed measuring wheel 405 drives the encoder 408 to rotate through the rotating shaft and the connecting shaft 410, and the encoder 408 obtains the movement speed and displacement of the coiled tubing 9 to be detected. At the same time, the encoder 408 can slide on the mounting bracket 406 through the slide plate 409, so that the encoder 408 moves in the vertical direction following the speed measuring wheel 405.

[0064] like Figure 6 As shown, the wall thickness ovality detection device 6 includes a probe seat 601 arranged in the box body 1 and close to the oil pipe port, and a channel for the continuous oil pipe 9 to be detected to pass through is arranged in the probe seat 601. A plurality of electromagnetic ultrasonic thickness measuring probes 602 and laser contour probes 603 electrically connected to the data acquisition and analysis module are arranged on the probe seat 601.

[0065] As an optional solution to the above embodiment, the probe seat 601 is a hollow cylindrical structure with a regular hexagonal cross-section, and an electromagnetic ultrasonic thickness measuring probe 602 and a laser contour probe 603 are penetrated through each side wall of the probe seat 601, and the detection ends of each electromagnetic ultrasonic thickness measuring probe 602 and laser contour probe 603 are located inside the probe seat 601.

[0066] In this embodiment, the selection of the encoder 408 and the probe and their internal structures are all prior art, and the working principle of each component and the specific connection relationship between the components are not specifically mentioned here. The structures not mentioned in this embodiment can refer to the prior art or the first embodiment, the second embodiment, etc.

[0067] Fourth embodiment:

[0068] like Figure 1The fourth embodiment of the present invention provides an online detection device for stress and distortion of multi-size continuous oil pipes. This embodiment makes further limitations on the first embodiment, and the main improvement lies in the improvement of the box body 1; specifically, the box body 1 includes an upper box body 101 and a lower box body 102, one side of the upper box body 101 and the lower box body 102 are hinged by a hinge, and a handle 103 is provided on the top of the upper box body 101; the oil pipe inlet 2 and the oil pipe outlet 3 are respectively provided on the side surfaces of the upper box body 101 and the lower box body 102.

[0069] The box body 1 is configured as an upper box body 101 and a lower box body 102 that cooperate with each other, so that the box body 1 is more convenient to open, and it is also convenient for the installation and subsequent maintenance of the speed displacement detection device 4, the magnetic signal detection device 5 and the wall thickness ovality detection device 6; the setting of the handle 103 can facilitate the carrying and picking up of the entire online detection device for stress distortion of multi-size continuous oil pipes.

[0070] As an optional solution of the above embodiment, a display module electrically connected to the data acquisition and analysis module is provided on the box 1. The display module can be a display, which can intuitively display the movement speed, displacement, stress distortion, ovality and wall thickness of the coiled tubing 9 to be tested, so that the operator can directly view the test results, and the operator can analyze the failure and scrapping of the coiled tubing according to the test results.

[0071] As an optional solution of the above embodiment, a plurality of heat dissipation holes 8 are provided on the four side walls of the box body 1. The provision of the heat dissipation holes 8 increases the heat dissipation area of ​​the surface of the box body 1 and performs convection exchange with the external air, thereby helping the online detection device to reduce the internal temperature so as to maintain the normal operating temperature of the online detection device.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An online stress distortion detection device for multi-size coiled tubing, characterized in that: It comprises a box body and a data acquisition and analysis module, wherein the two sides of the box body in the width direction are respectively provided with a tubing inlet and a tubing outlet for the continuous tubing to be detected to pass through; a speed displacement detection device, a magnetic signal detection device and a wall thickness ovality detection device electrically connected to the data acquisition and analysis module are sequentially arranged in the box body along the length direction of the connecting line of the tubing inlet and the tubing outlet; The speed and displacement detection device is used to detect the movement speed and displacement of the coiled tubing to be detected and transmit the detected movement speed and displacement to the data acquisition and analysis module; The magnetic signal detection device comprises a magnetization module and a detection module, wherein the detection module comprises a probe installation tube in a circular cylindrical structure, wherein the interior of the probe installation tube is for the coiled tubing to be detected to pass through, and the probe installation tube is provided with a plurality of magnetic signal detection probes electrically connected to the data acquisition and analysis module; the detection module comprises two high-uniformity electromagnetic cores arranged on both axial sides of the probe installation tube, wherein the two high-uniformity electromagnetic cores are respectively located on both sides of the radial direction of the coiled tubing to be detected; The wall thickness ovality detection device is used to detect the ovality and wall thickness of the coiled tubing to be detected and transmit the detected movement speed and displacement to the data acquisition and analysis module; The probe mounting tube is provided with a plurality of mounting grooves in an annular direction, the length direction of each mounting groove is oriented in the radial direction of the probe mounting tube, a cover plate is provided at the tail end of each mounting groove, and a limiting boss is provided at the head end of the mounting groove; A probe rack is slidably arranged in each mounting groove, a limit block in contact with the limit boss is arranged at the tail end of each probe rack, and a first cylindrical spring is arranged between the tail end of the probe rack and the cover plate; the head end of the probe rack passes through the mounting groove and is located inside the probe mounting tube, and a magnetic signal detection probe and a top wire steel ball are installed at the head end of the probe rack; the outer contour of the top wire steel ball contacts the outer wall of the continuous oil pipe to be detected, and a distance is arranged between the magnetic signal detection probe and the outer wall of the continuous oil pipe to be detected; The probe mounting tube is circumferentially provided with 18 mounting grooves, which are evenly divided into 3 groups. The 3 groups of mounting grooves are evenly arranged along the length direction of the probe mounting tube; the 6 mounting grooves in each group are evenly arranged circumferentially with the axis of the probe mounting tube as the center; the phase difference between two adjacent groups of mounting grooves is 20°.

2. The on-line stress distortion detection device for multi-size coiled tubing according to claim 1 is characterized in that: The speed displacement detection device comprises two mounting platforms symmetrically spaced apart, the two mounting platforms being arranged in the box body and close to the oil pipe inlet; the coiled oil pipe to be detected is located between the two mounting platforms; A sliding column is slidably connected in each mounting platform, a second cylindrical spring is arranged between the tail end of the sliding column and the mounting platform, a U-shaped block is arranged at the head end of the sliding column, a speed measuring wheel for contacting the outer wall of the coiled tubing to be tested is arranged in the U-shaped block through the rotation of the rotating shaft, and the speed measuring wheel is fixedly connected to the rotating shaft; A mounting bracket is provided on one side of each mounting platform, and a slide groove and an encoder electrically connected to the data acquisition and analysis module are provided on the mounting bracket, and a slide plate slidably matched with the slide groove is provided on the encoder, and the input shaft of the encoder is fixedly connected to the rotating shaft through a connecting shaft; the sliding direction of the encoder is in the same direction as the sliding direction of the slide column.

3. The on-line stress distortion detection device for multi-size coiled tubing according to claim 1 is characterized in that: The wall thickness ovality detection device includes a probe seat arranged in the box body and close to the oil pipe port, wherein a channel for the coiled oil pipe to be detected to pass through is arranged in the probe seat, and a plurality of electromagnetic ultrasonic thickness measuring probes and laser profile probes electrically connected to the data acquisition and analysis module are arranged on the probe seat.

4. The on-line stress distortion detection device for multi-size coiled tubing according to claim 3 is characterized in that: The probe seat is a hollow columnar structure with a regular hexagonal cross section. An electromagnetic ultrasonic thickness measuring probe and a laser contour probe are arranged through each side wall of the probe seat. The detection ends of each electromagnetic ultrasonic thickness measuring probe and laser contour probe are located inside the probe seat.

5. The on-line stress distortion detection device for multi-size coiled tubing according to any one of claims 1 to 4, characterized in that: A refrigeration device is arranged in the box, and the refrigeration device includes a plurality of fans arranged around the two high-uniformity electromagnetic cores.

6. The on-line stress distortion detection device for multi-size coiled tubing according to any one of claims 1 to 4, characterized in that: The box body comprises an upper box body and a lower box body, one side of the upper box body and the lower box body are hinged by a hinge, and a handle is arranged on the top of the upper box body; the oil pipe inlet and the oil pipe outlet are respectively arranged on the side surfaces of the upper box body and the lower box body.

7. The on-line stress distortion detection device for multi-size coiled tubing according to claim 1 is characterized in that: The box body is provided with a display module electrically connected to the data acquisition and analysis module.

8. The on-line stress distortion detection device for multi-size coiled tubing according to claim 1 is characterized in that: A plurality of heat dissipation holes are arranged on the side walls around the box body.

Images