Test system suitable for damage detection of multi-size coiled tubing

Abstract

The invention relates to a test system suitable for damage detection of multi-size coiled tubing, and belongs to the technical field of oil and natural gas extraction equipment detection. The test system comprises a main frame. The top of the main frame is provided with a power supply, and a signal acquisition system and a controller which are electrically connected with the power supply. A speed-controllable sliding rail assembly and a coiled tubing damage detection device are arranged on the top of the main frame in the length direction of the main frame. The speed-controllable slide rail assembly is electrically connected with the controller; the coiled tubing damage detection device is electrically connected with the signal acquisition system; the speed-controllable sliding rail assembly drives the coiled tubing to operate at any speed, the coiled tubing damage detection device detects flaws of the coiled tubing, magnetic signal influence factors of the coiled tubing with different speeds, different internal pressures, different damages, different currents and different specifications on a damaged area can be analyzed, and finally the damaged area is accurately identified and evaluated.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas production equipment detection, and in particular relates to an experimental test system suitable for multi-size continuous oil pipe damage detection. Background Art

[0002] In the oil and gas extraction industry, coiled tubing is widely used in drilling, completion, workover, oil production and other links due to its advantages of not requiring frequent connections, high operating efficiency, and the ability to achieve a variety of downhole operations. With the continuous deepening and complexity of extraction operations, coiled tubing is prone to wear, corrosion, cracks and other damages under harsh working conditions such as high pressure, high corrosion, and high stress. If these damages are not detected and repaired in time, they are likely to cause serious accidents such as pipe rupture and leakage, which will not only cause huge economic losses, but also pose a serious threat to the environment and personnel safety. Therefore, efficient and accurate detection of the damage condition of coiled tubing is crucial to ensure the safe and stable operation of oil and gas extraction operations.

[0003] At present, although the experimental test system for continuous tubing damage detection has developed to a certain extent, it still has many limitations. Most existing detection devices are only suitable for the detection of continuous tubing of a specific size, and cannot meet the diversified detection needs of tubings of different specifications; traditional detection methods can only detect macroscopic damage, but cannot detect stress concentration areas, and existing devices cannot simultaneously analyze the impact of stress on the damage area signal; the existing test system has a relatively single function, and can often only detect one or several specific types of damage, and cannot comprehensively analyze the impact of damage, stress, current, speed, and pipe diameter on the damage signal, making it difficult to achieve comprehensive and integrated detection of various damage forms of continuous tubing.

[0004] Therefore, in view of the shortcomings of existing detection devices, an experimental test system that can be applied to multi-size coiled tubings and has multi-functional damage detection capabilities is designed, including analysis of the impact of coiled tubing damage, stress size, speed, excitation size, and different specifications of pipe diameters on the detection signal of the damaged area. From the collection of detection signals to upper data analysis and processing, a complete detection system is formed, which has important practical significance for improving the level of coiled tubing damage detection and ensuring the safe and efficient development of the oil and gas extraction industry.

[0005] Therefore, in view of the shortcomings of the existing continuous tubing detection devices, a continuous tubing detection device suitable for multiple sizes is designed and invented, which has positive significance for realizing the detection of continuous tubing in complex working conditions. Summary of the invention

[0006] Based on the problems existing in the above background technology, the present invention proposes an experimental test system suitable for multi-size coiled tubing damage detection, which solves the problem that the coiled tubing detection device in the prior art does not fully understand the factors affecting the coiled tubing damage detection signal.

[0007] The embodiment of the present invention is achieved as follows: The embodiment of the present invention provides a test system for multi-size coiled tubing damage detection, which includes a main frame, a power supply and a signal acquisition system and a controller electrically connected to the power supply are arranged on the top of the main frame; a speed-controllable slide rail assembly and a coiled tubing damage detection device are arranged on the top of the main frame along its length direction; the speed-controllable slide rail assembly is electrically connected to the controller; the coiled tubing damage detection device is electrically connected to the signal acquisition system; The speed-controllable slide rail assembly includes a slider, on which a clamping device for fixing a coiled tubing is provided; a guide device is provided on both sides of the coiled tubing damage detection device in the length direction; when testing the coiled tubing, one end of the coiled tubing passes through the guide device, the coiled tubing damage detection device, the guide device and the clamping device in sequence to be fixedly connected.

[0008] The basic principle of the test system for multi-size continuous tubing damage detection in the present invention is as follows: during the test, the clamping mechanism clamps the continuous tubing, two guide devices guide the continuous tubing into the continuous tubing damage detection device, and the clamping mechanism moves at a uniform speed together with the continuous tubing under the drive of the speed-controllable slide rail assembly; when the continuous tubing is damaged, the magnetic permeability at the damaged position changes suddenly, and a leakage magnetic field is generated at the damaged position. The continuous tubing damage detection device collects leakage magnetic field signal data, and the signal acquisition system pre-processes the leakage magnetic field signal data. The upper computer performs signal processing methods such as filtering, amplification, and feature extraction on the leakage magnetic field signal data to achieve damage identification and evaluation. The speed-controllable slide rail assembly can realize the operation of the continuous tubing at any speed, and can simulate the influence of the running speed on the detection signal in the actual detection condition of the continuous tubing, so that the detection of the continuous tubing under the moving condition is more in line with the actual detection condition.

[0009] Further, as an optional solution of the above embodiment, the speed-controllable slide rail assembly also includes a bottom plate arranged on the upper end surface of the main frame, the upper end surface of the bottom plate is provided with two slide rails, a gap is provided between the two slide rails and they are arranged along the length direction of the main frame, each slide rail is slidably provided with a slider, the two sliders are connected as a whole by a fixing plate provided on the top thereof, and the clamping device is provided on the upper end surface of the fixing plate; A driving pulley and a driven pulley are rotatably arranged at both ends of the two slide rails in the length direction, and the driving pulley and the driven pulley are fixedly connected to the upper end surface of the base plate through a pulley bracket, and a transmission belt is arranged between the driving pulley and the driven pulley, and the transmission belt is located between the two slide rails and fixedly connected to the fixed plate, and a motor is arranged on one side of the driving pulley with a bottom fixedly connected to the upper end surface of the base plate, and the output shaft of the motor drives the driving pulley to rotate around its own axis through a coupling, and the motor is electrically connected to the controller.

[0010] The working principle of the speed-controllable slide rail assembly is as follows: the continuous oil pipe is fixedly connected to the two slide rails through a clamping device and a fixing plate, and then the controller controls the motor to rotate at a preset speed. The motor rotates and drives the transmission belt to move through the active pulley. The moving transmission belt drives the slider to slide along the length direction of the slide rail, and finally the speed-controllable slide rail assembly drives the continuous oil pipe to move at a uniform speed, simulating the influence of the operating speed on the detection signal in the actual detection condition of the continuous oil pipe.

[0011] Further, as an optional solution of the above embodiment, the clamping device includes a base, a fixed block and a clamping block, the base is detachably connected to the upper end surface of the fixed plate, the lower end surface of the fixed block is connected to the upper end surface of the base, the upper end surface of the fixed block is provided with a semicircular groove, the lower end surface of the clamping block is provided with a semicircular groove, the lower end surface of the clamping block contacts the upper end surface of the fixed block, and the clamping block is detachably connected to the fixed block through a plurality of locking screws. When the clamping device clamps the end of the coiled tubing, the end of the coiled tubing is first placed in the semicircular groove of the fixed block, and then the clamping block is placed on the top of the coiled tubing, so that the semicircular grass of the clamping block contacts the circumferential outer wall of the coiled tubing, and then the plurality of locking screws are tightened so that the two semicircular grooves press the circumferential outer wall of the coiled tubing, and finally the coiled tubing is fixed to the entire clamping device. In actual use, semicircular grooves of different diameters are provided on the fixed block and the clamping block to adapt to coiled tubings of different diameters.

[0012] Further, as an optional solution of the above embodiment, friction knurling is provided in both of the semicircular grooves. The friction knurling increases the friction between the semicircular groove and the circumferential outer wall of the coiled tubing, thereby preventing the coiled tubing from falling off.

[0013] Further, as an optional solution of the above embodiment, each of the guide devices includes a fixing frame with a concave structure, the bottom of the fixing frame is fixedly connected to the upper end surface of the main frame, and at least one long hole is vertically arranged on both sides of the fixing frame; an adjustment plate is arranged on the two inner side walls of the fixing plate, and a U-shaped wheel is rotatably arranged between the two adjustment plates, and a U-shaped groove for fitting with the outer wall of the continuous oil pipe is arranged on the circumferential outer wall of the U-shaped wheel; at least one locking bolt connector matching with the long hole is arranged on the outer wall of each adjustment plate. The guide device is used to guide the continuous oil pipe. Specifically, the continuous oil pipe is arranged on the U-shaped wheel and the U-shaped groove fits with the circumferential outer wall of the continuous oil pipe. The height of the entire U-shaped wheel can be adjusted to adapt to the height of the continuous oil pipe by changing the position of the adjustment plate in the vertical direction.

[0014] Further, as an optional solution of the above embodiment, the coiled tubing damage detection device comprises a box body, and the two side surfaces of the box body in the length direction are respectively provided with a tubing inlet and a tubing outlet for the coiled tubing to be detected to pass through; a speed measurement module, a magnetization module, a damage detection module and a magnetization module electrically connected to the signal acquisition system are sequentially arranged in the box body along the length direction of the line connecting the tubing inlet and the tubing outlet; The speed measurement module is used to collect the movement speed and displacement data of the coiled tubing in real time and transmit the data to the signal acquisition system; the two magnetization modules are arranged on both sides of the damage detection module, and the magnetization modules are used to apply magnetic fields of different intensities to the coiled tubing; the damage detection module collects the leakage magnetic field signal data of the coiled tubing and transmits the leakage magnetic field signal data to the signal acquisition system.

[0015] Further, as an optional solution of the above embodiment, each of the magnetization modules is composed of two "U"-shaped magnetic cores, and winding coils are wound on the two poles of each magnetic core. The magnetization module provides a constant current to the winding coil through a power supply, thereby generating a constant magnetic field. The magnetic core and the coiled tubing form a magnetic circuit to achieve magnetization of the coiled tubing, and the magnetization intensity is controlled by changing the magnitude of the current.

[0016] Further, as an optional scheme for the above embodiment, the speed measuring module includes two speed measuring parts respectively arranged above and below the continuous oil pipe, each of the speed measuring parts includes a fixing seat fixedly connected to the inner wall of the box body, a telescopic arm is vertically arranged inside the fixing seat, one end of the telescopic arm is connected to the fixing seat through a spring, and the other end is located outside the fixing seat and a wheel bracket with a door-shaped structure is arranged thereon, a speed measuring wheel for tightly contacting the outer wall of the continuous oil pipe is arranged in the middle of the wheel bracket, the speed measuring wheel is rotatably connected to the wheel bracket through a wheel axle, an encoder is arranged on an outer side wall of the wheel bracket, the rotating shaft of the encoder is synchronously connected to the wheel axle, and the electrical interface of the encoder is electrically connected to the signal acquisition system. When the speed measuring module detects the movement speed and displacement of the coiled tubing, the coiled tubing is located between two speed measuring parts, and the spring pushes the telescopic arm to move toward the coiled tubing until the speed measuring wheel on the wheel bracket contacts the outer wall of the coiled tubing. The moving coiled tubing drives the speed measuring wheel to rotate, and the rotating speed measuring wheel drives the encoder rotating shaft to rotate through the wheel axle. The encoder obtains the movement speed and displacement of the coiled tubing to locate the damage of the coiled tubing.

[0017] Further, as an optional scheme of the above embodiment, the damage detection module includes a probe mounting tube, the axial direction of the probe mounting tube is in the same direction as the length direction of the main frame, the interior of the probe mounting tube is for the continuous oil pipe to be detected to pass through, and a plurality of mounting grooves are evenly arranged on the probe mounting tube at annular intervals, the length direction of each mounting groove is toward the radial direction of the probe mounting tube, and a cover plate is arranged at the tail end of each mounting groove; a probe frame is slidably arranged in each mounting groove, the tail end of each probe frame is fixedly connected to the cover plate through a cylindrical spring, the head end of the probe frame passes through the mounting groove and is located inside the probe mounting tube, a magnetic signal detection probe electrically connected to the signal acquisition system is installed inside the probe frame, the head end of each magnetic signal detection probe is located on the end face of the probe frame head, a top wire steel ball is arranged on both sides of the head end of each magnetic signal detection probe, the outer contour of each top wire steel ball contacts the outer wall of the continuous oil pipe, and a spacing is arranged between the magnetic signal detection probe and the outer wall of the continuous oil pipe to be detected.

[0018] Multiple magnetic signal detection probes can completely cover the surface of continuous oil pipes of different diameters, and the magnetic signal detection probe covers the entire surface and has an accurate detection effect. The probe frame is slidably arranged in the installation groove, which can not only adapt to continuous oil pipes of different outer diameters, but also, due to the setting of the first cylindrical spring, the top wire steel ball on the head end of the probe frame can always be in contact with the outer wall of the continuous oil pipe, and a spacing is set 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 magnetic signal detection probe is arranged at the head end of the probe frame and is located inside the probe installation tube, which can exempt the magnetic signal detection probe from interference from external factors such as oil stains and sludge. The setting of the cover plate can fix the entire probe frame in the installation groove, and the cover plate can be made of signal shielding material to play the role of shielding the signal, so as to prevent the magnetic signal detection probe from being interfered by external factors and affecting the detection accuracy.

[0019] Furthermore, as an optional scheme for the above embodiment, the material of the main frame is aluminum alloy; universal wheels and directional wheels are provided at the bottom of the main frame to reduce the weight of the entire test system, and the guiding is flexible and the transportation is convenient; 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, and 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 measurement module, the magnetization module, and the damage detection module; the setting of the handle can facilitate the carrying and taking of the entire continuous oil pipe damage detection device; a plurality of heat dissipation holes are provided on the side walls around the box body, and the heat dissipation holes perform convection exchange with the external air to help the continuous oil pipe damage detection device reduce the internal temperature to maintain the normal operation of the continuous oil pipe damage detection device.

[0020] The beneficial effects of the present invention are: 1. The present invention provides a test system suitable for damage detection of multi-size coiled tubings. The main frame constructed of aluminum alloy profiles is equipped with universal wheels and directional wheels, which is easy to move and can be used in a variety of detection environments. The weight of the entire test system is greatly reduced compared to conventional detection systems.

[0021] 2. The present invention provides a multifunctional test system suitable for damage detection of multi-size coiled tubing. In order to simulate the influence of running speed on detection signal in actual detection conditions of coiled tubing, the speed-controllable slide rail assembly adopts belt drive, which can realize the operation of coiled tubing at any speed. Detection under motion conditions is more in line with actual detection conditions.

[0022] 3. The present invention is applicable to a multifunctional test system suitable for damage detection of multi-size continuous oil pipes. The clamping mechanism can realize the test of continuous oil pipes of different specifications without frequent replacement of the clamping mechanism. It has strong compatibility and a wide detection range.

[0023] 4. The present invention provides a multifunctional test system suitable for damage detection of multi-size coiled tubings. The multi-channel voltage-stabilized power supply can provide currents of different magnitudes to the magnetization module, thereby achieving different magnetization degrees of the coiled tubing. When the special coiled tubing is pressurized under the condition of non-saturated magnetization, the influence of the internal pressure on the damage signal of the coiled tubing can be detected, which is more in line with the actual detection working conditions of the coiled tubing and is conducive to improving the detection accuracy.

[0024] 5. The present invention provides a multifunctional test system suitable for damage detection of continuous oil pipes of various sizes. The speed measuring module and the damage detection module adopt a variable diameter design, which is suitable for the detection needs of continuous oil pipes of various specifications. The variable diameter design ensures that the relative positions of the speed measuring wheel and the array magnetic signal detection probe and the continuous oil pipe remain unchanged. The dual speed measuring parts are used for joint correction to make the speed measurement and damage positioning more accurate. The lift-off value between the array magnetic signal detection probe and the continuous oil pipe is constant, avoiding the influence of the bent continuous oil pipe on the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 Schematic diagram of the three-dimensional structure of a test system suitable for multi-size continuous tubing damage detection.

[0027] Figure 2 Schematic diagram of the three-dimensional structure of the speed-controlled slide assembly.

[0028] Figure 3 Schematic diagram of the three-dimensional structure of the clamping device.

[0029] Figure 4 It is a schematic diagram of the structure of a single guide device.

[0030] Figure 5 This is a schematic diagram of the structure of the coiled tubing damage detection device.

[0031] Figure 6 Schematic diagram of the internal structure of the box.

[0032] Figure 7 This is a schematic diagram of the structure of the speed measurement module.

[0033] Figure 8 It is a structural schematic diagram of the magnetization module.

[0034] Fig. 9 This is a schematic diagram of the damage detection module.

[0035] Fig.10 Schematic diagram of the internal structure of the damage detection module.

[0036] Among them, 1. Main frame; 2. Power supply; 3. Signal acquisition system; 4. Controller; 5. Speed-controlled slide rail assembly; 51. Sliding block; 52. Bottom plate; 53. Slide rail; 54. Fixed plate; 55. Driving pulley; 56. Driven pulley; 57. Transmission belt; 58. Motor; 6. Coiled tubing damage detection device; 61. Box; 611. Handle; 612. Heat dissipation hole; 62. Speed ​​measuring module; 621. Fixed seat; 622. Telescopic arm; 623. Wheel bracket; 624. Speed ​​measuring wheel; 625. Encoder; 63. Magnetization module; 64. Damage detection module; 641. Probe mounting tube; 642. Mounting slot; 643. Cover plate; 644. Probe holder; 645. Cylindrical spring; 646. Magnetic signal detection probe; 647. Top wire steel ball; 7. Clamping device; 71. Base; 72. Fixing block; 73. Clamping block; 74. Semicircular groove; 8. Guide device; 81. Fixing frame; 82. Long hole; 83. Adjustment plate; 84. U-shaped wheel; 85. Locking bolt connector; 9. Universal wheel; 10. Steering wheel; 11. Continuous oil pipe. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0041] First embodiment: Please refer to Figure 1~Figure 4 As shown, the first embodiment of the present invention provides a test system suitable for multi-size continuous tubing damage detection, which includes a main frame 1, and the top of the main frame 1 is provided with a power supply 2 and a signal acquisition system 3 and a controller 4 electrically connected to the power supply 2; the top of the main frame 1 is provided with a speed-controllable slide rail assembly 5 and a continuous tubing damage detection device 6 along its length direction; the speed-controllable slide rail assembly 5 is electrically connected to the controller 4; the continuous tubing damage detection device 6 is electrically connected to the signal acquisition system 3.

[0042] The speed-controllable slide rail assembly 5 comprises a slide block 51 , on which a clamping device 7 for fixing the coiled tubing 11 is disposed.

[0043] A guide device 8 is provided on both sides of the coiled tubing damage detection device 6 in the length direction; when testing the coiled tubing 11, one end of the coiled tubing 11 passes through the guide device 8, the coiled tubing damage detection device 6, the guide device 8 and the clamping device 7 in sequence and is fixedly connected.

[0044] Specifically, as an optional solution of the above embodiment, the speed-controllable slide rail assembly 5 also includes a bottom plate 52 arranged on the upper end surface of the main frame 1, and the upper end surface of the bottom plate 52 is provided with two slide rails 53, a gap is provided between the two slide rails 53 and they are arranged along the length direction of the main frame 1, and a slider 51 is slidably arranged on each slide rail 53, and the two sliders 51 are connected as a whole by a fixing plate 54 arranged on the top thereof, and the clamping device 7 is arranged on the upper end surface of the fixing plate 54; A driving pulley 55 and a driven pulley 56 are rotatably provided at both ends of the two slide rails 53 in the length direction. The driving pulley 55 and the driven pulley 56 are fixedly connected to the upper end surface of the base plate 52 through a pulley bracket 623. A transmission belt 57 is provided between the driving pulley 55 and the driven pulley 56. The transmission belt 57 is located between the two slide rails 53 and is fixedly connected to the fixed plate 54. A motor 58 is provided on one side of the driving pulley 55, and the bottom is fixedly connected to the upper end surface of the base plate 52. The output shaft of the motor 58 drives the driving pulley 55 to rotate around its own axis through a coupling, and the motor 58 is electrically connected to the controller 4.

[0045] The working principle of the speed-controllable slide rail assembly 5 is as follows: the continuous oil pipe 11 is fixedly connected to the two slide rails 53 through the clamping device 7 and the fixing plate 54, and then the controller 4 controls the motor 58 to rotate at a preset speed. The motor 58 rotates and drives the transmission belt 57 to move through the active pulley 55. The moving transmission belt 57 drives the slider 51 to slide along the length direction of the slide rail 53, and finally the speed-controllable slide rail assembly 5 drives the continuous oil pipe 11 to move at a uniform speed, simulating the influence of the running speed on the detection signal in the actual detection condition of the continuous oil pipe 11.

[0046] Further, as an optional scheme of the above embodiment, the clamping device 7 includes a base 71, a fixed block 72 and a clamping block 73, the base 71 is detachably connected to the upper end surface of the fixed plate 54, the lower end surface of the fixed block 72 is connected to the upper end surface of the base 71, the upper end surface of the fixed block 72 is provided with a semicircular groove 74, the lower end surface of the clamping block 73 is provided with a semicircular groove 74, the lower end surface of the clamping block 73 is in contact with the upper end surface of the fixed block 72, and the clamping block 73 is detachably connected to the fixed block 72 by a plurality of locking screws. When the clamping device 7 clamps the end of the coiled tubing 11, the end of the coiled tubing 11 is first placed in the semicircular groove 74 of the fixing block 72, and then the clamping block 73 is placed on the top of the coiled tubing 11, so that the semicircular grass of the clamping block 73 contacts the circumferential outer wall of the coiled tubing 11, and then multiple locking screws are tightened so that the two semicircular grooves 74 press the circumferential outer wall of the coiled tubing 11, and finally the coiled tubing 11 is fixed to the entire clamping device 7. In actual use, semicircular grooves 74 of different diameters are provided on the fixing block 72 and the clamping block 73 to adapt to coiled tubings 11 of different diameters.

[0047] Further, as an optional solution of the above embodiment, friction knurling is provided in both of the semicircular grooves 74. The friction knurling increases the friction between the semicircular grooves 74 and the circumferential outer wall of the coiled tubing 11, thereby preventing the coiled tubing 11 from falling off.

[0048] Further, as an optional solution of the above embodiment, each of the guide devices 8 includes a fixing frame 81 with a concave structure, the bottom of the fixing frame 81 is fixedly connected to the upper end surface of the main frame 1, and at least one long hole 82 is vertically arranged on both sides of the fixing frame 81; an adjustment plate 83 is arranged on the two inner side walls of the fixing plate 54, and a U-shaped wheel 84 is rotatably arranged between the two adjustment plates 83, and a U-shaped groove for fitting with the outer wall of the continuous oil pipe 11 is arranged on the circumferential outer wall of the U-shaped wheel 84; at least one locking bolt connector 85 matching with the long hole 82 is arranged on the outer wall of each adjustment plate 83. The guide device 8 is used to guide the continuous oil pipe 11. Specifically, the continuous oil pipe 11 is arranged on the U-shaped wheel 84 and the U-shaped groove fits with the circumferential outer wall of the continuous oil pipe 11, and the height of the entire U-shaped wheel 84 can be adjusted to adapt to the height of the continuous oil pipe 11 by changing the position of the adjustment plate 83 in the vertical direction.

[0049] The basic principle of the test system for multi-size continuous tubing damage detection in the present invention is as follows: during the test, the clamping mechanism clamps the continuous tubing 11, and the two guide devices 8 guide the continuous tubing 11 into the continuous tubing damage detection device 6. The clamping mechanism moves at a uniform speed together with the continuous tubing 11 under the drive of the speed-controllable slide rail assembly 5. When the continuous tubing 11 is damaged, the magnetic permeability at the damaged position changes suddenly, and a leakage magnetic field is generated at the damaged position. The continuous tubing damage detection device 6 collects leakage magnetic field signal data, and the signal acquisition system 3 pre-processes the leakage magnetic field signal data. The upper computer performs signal processing methods such as filtering, amplification, and feature extraction on the leakage magnetic field signal data to achieve damage identification and evaluation. The speed-controllable slide rail assembly 5 can realize the operation of the continuous tubing 11 at any speed, and can simulate the influence of the running speed on the detection signal in the actual detection condition of the continuous tubing 11, so that the detection of the continuous tubing 11 under the moving condition is more in line with the actual detection condition.

[0050] In this embodiment, the selection of the power supply 2, the signal acquisition system 3, the controller 4 and the motor 58 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: Figure 1 and Figure 5~Figure 10 As shown, the second embodiment of the present invention provides a test system suitable for multi-size continuous tubing damage detection. The test system is further limited on the basis of the first embodiment. The improvement lies in how to specifically set the continuous tubing damage detection device 6. For other parts not mentioned, please refer to the first embodiment or the prior art.

[0052] like Figure 5 and Figure 6As shown, specifically, the coiled tubing damage detection device 6 includes a box body 61, and the two side surfaces of the box body 61 in the length direction are respectively provided with a tubing inlet and a tubing outlet for the coiled tubing 11 to be detected to pass through; the box body 61 is provided with a speed measurement module 62, a magnetization module 63, a damage detection module 64 and a magnetization module 63 electrically connected to the signal acquisition system 3 in sequence along the length direction of the line connecting the tubing inlet and the tubing outlet.

[0053] Specifically, the box body 61 includes an upper box body 61 and a lower box body 61, one side of the upper box body 61 and the lower box body 61 are hinged, and a handle 611 is arranged on the top of the upper box body 61; the oil pipe inlet and the oil pipe outlet are arranged on the side surfaces of the upper box body 61 and the lower box body 61 respectively, and the box body 61 is arranged as an upper box body 61 and a lower box body 61 that cooperate with each other, so that the box body 61 is more convenient to open, and it is also convenient for the installation and subsequent maintenance of the speed measurement module 62, the magnetization module 63, and the damage detection module 64; the setting of the handle 611 can facilitate the carrying and taking of the entire continuous oil pipe damage detection device 6; a plurality of heat dissipation holes 612 are arranged on the surrounding side walls of the box body 61, and the heat dissipation holes 612 perform convection exchange with the external air to help the continuous oil pipe damage detection device 6 reduce the internal temperature to maintain the normal operation of the continuous oil pipe damage detection device 6.

[0054] The speed measurement module 62 is used to collect the movement speed and displacement data of the coiled tubing 11 in real time and transmit the data to the signal acquisition system 3; the two magnetization modules 63 are arranged on both sides of the damage detection module 64, and the magnetization module 63 is used to apply magnetic fields of different intensities to the coiled tubing 11; the damage detection module 64 collects the leakage magnetic field signal data of the coiled tubing 11 and transmits the leakage magnetic field signal data to the signal acquisition system 3.

[0055] Furthermore, if Figure 8 As shown, as an optional solution of the above embodiment, each of the magnetizing modules 63 is composed of two "U"-shaped magnetic cores, and winding coils are wound on the two poles of each magnetic core. The magnetizing module 63 provides a constant current to the winding coil through the power supply 2, thereby generating a constant magnetic field. The magnetic core and the coiled tubing 11 form a magnetic circuit to achieve magnetization of the coiled tubing 11, and the magnetization intensity is controlled by changing the magnitude of the current.

[0056] Furthermore, if Figure 7As shown, as an optional scheme of the above embodiment, the speed measuring module 62 includes two speed measuring parts respectively arranged above and below the coiled tubing 11, each of the speed measuring parts includes a fixing seat 621 fixedly connected to the inner wall of the box body 61, a telescopic arm 622 is vertically arranged inside the fixing seat 621, one end of the telescopic arm 622 is connected to the fixing seat 621 through a spring, and the other end is located outside the fixing seat 621 and a wheel bracket 623 with a door-shaped structure is arranged thereon, a speed measuring wheel 624 for tightly contacting the outer wall of the coiled tubing 11 is arranged in the middle of the wheel bracket 623, the speed measuring wheel 624 is rotatably connected to the wheel bracket 623 through a wheel axle, an encoder 625 is arranged on an outer side wall of the wheel bracket 623, the rotating shaft of the encoder 625 is synchronously connected to the wheel axle, and the electrical interface of the encoder 625 is electrically connected to the signal acquisition system 3. When the speed measuring module 62 detects the movement speed and displacement of the coiled tubing 11, the coiled tubing 11 is located between the two speed measuring parts, and the spring pushes the telescopic arm 622 to move toward the coiled tubing 11 until the speed measuring wheel 624 on the wheel bracket 623 contacts the outer wall of the coiled tubing 11, and the moving coiled tubing 11 drives the speed measuring wheel 624 to rotate, and the rotating speed measuring wheel 624 drives the encoder 625 rotating shaft to rotate through the wheel axle, and the encoder 625 obtains the movement speed and displacement of the coiled tubing 11 to realize damage positioning of the coiled tubing 11.

[0057] Furthermore, if Fig. 9 and Fig.10 As shown, as an optional solution of the above embodiment, the damage detection module 64 includes a probe installation tube 641, the axial direction of the probe installation tube 641 is in the same direction as the length direction of the main frame 1, the interior of the probe installation tube 641 is for the coiled tubing 11 to be detected to pass through, and the probe installation tube 641 is evenly and circumferentially spaced and penetrated with a plurality of installation grooves 642, the length direction of each installation groove 642 is oriented in the radial direction of the probe installation tube 641, and a cover plate 643 is provided at the tail end of each installation groove 642; a probe frame 644 is slidably provided in each installation groove 642, and the tail end of each probe frame 644 is passed through A cylindrical spring 645 is fixedly connected to the cover plate 643, the head end of the probe frame 644 passes through the mounting groove 642 and is located inside the probe mounting tube 641, a magnetic signal detection probe 646 electrically connected to the signal acquisition system 3 is installed inside the probe frame 644, the head end of each magnetic signal detection probe 646 is located on the end surface of the head of the probe frame 644, a top wire steel ball 647 is arranged on both sides of the head end of each magnetic signal detection probe 646, the outer contour of each top wire steel ball 647 is in contact with the outer wall of the continuous oil pipe 11, and a distance is arranged between the magnetic signal detection probe 646 and the outer wall of the continuous oil pipe 11 to be detected.

[0058] Multiple magnetic signal detection probes 646 can completely cover the surface of the continuous oil pipe 11 of different diameters. The magnetic signal detection probe 646 covers the entire surface and has an accurate detection effect. The probe frame 644 is slidably arranged in the mounting groove 642, which can not only adapt to the continuous oil pipes 11 of different outer diameters, but also, due to the arrangement of the first cylindrical spring 645, the top wire steel ball 647 on the head end of the probe frame 644 can always contact the outer wall of the continuous oil pipe 11, and a spacing is arranged between the magnetic signal detection probe 646 and the outer wall of the continuous oil pipe 11 to be detected, so that the magnetic signal detection probe 646 and the continuous oil pipe 11 to be detected maintain a compact distance under the premise of safety, so that the detection result is more accurate. The magnetic signal detection probe 646 is arranged at the head end of the probe frame 644 and is located inside the probe mounting tube 641, so that the magnetic signal detection probe 646 is free from interference from external factors such as oil stains and sludge. The setting of the cover 643 can fix the entire probe frame 644 in the installation groove 642, and the cover 643 can be made of signal shielding material to shield the signal and prevent the magnetic signal detection probe 646 from being interfered by external factors and affecting the detection accuracy.

[0059] During the test, the clamping mechanism clamps the continuous tubing 11, and the guide device 8 adjusts the continuous tubing 11 to the same axial position as the magnetic signal detection probe 646 of the array. The clamping mechanism moves at a constant speed together with the continuous tubing 11 under the drive of the speed-controllable slide rail assembly 5; the speed measuring module 62 can move with a variable diameter under the action of the spring and the telescopic arm 622, so that the speed measuring wheel 624 moves closely against the continuous tubing 11; the magnetic signal detection probe 646 in the damage detection module 64 moves while maintaining a constant distance from the continuous tubing 11.

[0060] The magnetization module 63 provides a constant current to the winding coil through the power supply 2, thereby generating a constant magnetic field. The magnetic core and the continuous tubing 11 form a magnetic circuit to realize the magnetization of the continuous tubing 11. The magnetization intensity is controlled by changing the magnitude of the current. When the continuous tubing 11 is damaged, the magnetic permeability at the damaged position changes suddenly, and a leakage magnetic field is generated at the damaged position. The magnetic signal detection probe 646 collects the leakage magnetic field signal, and the signal acquisition system 3 realizes the identification and evaluation of the damage; the encoder 625 module detects the running speed and length of the continuous tubing 11 to realize the location of the damage.

[0061] For structures not mentioned in this embodiment, reference may be made to the prior art or the first embodiment.

[0062] The third embodiment: Figure 1 As shown, the third embodiment of the present invention provides a test system suitable for multi-size continuous oil pipe damage detection. The test system is further limited on the basis of the second embodiment. The improvement lies in how to specifically set the main frame 1. For other parts not mentioned, please refer to the first and second embodiments or the prior art.

[0063] like Figure 4 and Figure 5 As shown, the material of the main frame 1 is aluminum alloy; universal wheels 9 and directional wheels 10 are provided at the bottom of the main frame 1 to reduce the weight of the entire test system. The main frame 1 constructed of aluminum alloy profiles is equipped with universal wheels 9 and directional wheels 10, which is easy to move and can be used in a variety of detection environments. The weight of the entire test system is greatly reduced compared with conventional detection systems.

[0064] 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. A test system suitable for multi-size coiled tubing damage detection, characterized in that: The invention comprises a main frame, wherein a power source and a signal acquisition system and a controller electrically connected to the power source are arranged on the top of the main frame; a speed-controllable slide rail assembly and a coiled tubing damage detection device are arranged on the top of the main frame along its length direction; the speed-controllable slide rail assembly is electrically connected to the controller; the coiled tubing damage detection device is electrically connected to the signal acquisition system; The speed-controllable slide rail assembly includes a slider, on which a clamping device for fixing a coiled tubing is provided; a guide device is provided on both sides of the coiled tubing damage detection device in the length direction; when testing the coiled tubing, one end of the coiled tubing passes through the guide device, the coiled tubing damage detection device, the guide device and the clamping device in sequence to be fixedly connected.

2. The test system for multi-size coiled tubing damage detection according to claim 1 is characterized in that: The speed-controllable slide rail assembly also includes a bottom plate arranged on the upper end surface of the main frame, the upper end surface of the bottom plate is provided with two slide rails, a gap is provided between the two slide rails and they are arranged along the length direction of the main frame, each slide rail is slidably provided with a slider, the two sliders are connected as a whole by a fixed plate provided on the top thereof, and the clamping device is provided on the upper end surface of the fixed plate; A driving pulley and a driven pulley are rotatably arranged at both ends of the two slide rails in the length direction, and the driving pulley and the driven pulley are fixedly connected to the upper end surface of the base plate through a pulley bracket, and a transmission belt is arranged between the driving pulley and the driven pulley, and the transmission belt is located between the two slide rails and fixedly connected to the fixed plate, and a motor is arranged on one side of the driving pulley with a bottom fixedly connected to the upper end surface of the base plate, and the output shaft of the motor drives the driving pulley to rotate around its own axis through a coupling, and the motor is electrically connected to the controller.

3. The test system for multi-size coiled tubing damage detection according to claim 2 is characterized in that: The clamping device includes a base, a fixed block and a clamping block. The base is detachably connected to the upper end surface of the fixed plate, the lower end surface of the fixed block is connected to the upper end surface of the base, the upper end surface of the fixed block is provided with a semicircular groove, the lower end surface of the clamping block is provided with a semicircular groove, the lower end surface of the clamping block contacts the upper end surface of the fixed block, and the clamping block is detachably connected to the fixed block by a plurality of locking screws.

4. The test system for multi-size coiled tubing damage detection according to claim 3 is characterized in that: Friction knurling is arranged in the two semicircular grooves.

5. The test system for multi-size coiled tubing damage detection according to claim 1, characterized in that: Each of the guide devices includes a fixing frame with a concave structure, the bottom of the fixing frame is fixedly connected to the upper end surface of the main frame, and at least one long hole is vertically arranged on both sides of the fixing frame; an adjustment plate is arranged on the two inner side walls of the fixing plate, and a U-shaped wheel is rotatably arranged between the two adjustment plates, and a U-shaped groove for fitting with the outer wall of the continuous oil pipe is arranged on the circumferential outer wall of the U-shaped wheel; at least one locking bolt connecting piece matching with the long hole is arranged on the outer wall of each adjustment plate.

6. The test system for multi-size coiled tubing damage detection according to claim 1, characterized in that: The coiled tubing damage detection device comprises a box body, and the two sides of the box body in the length direction are respectively provided with a tubing inlet and a tubing outlet for the coiled tubing to be detected to pass through; a speed measurement module, a magnetization module, a damage detection module and a magnetization module electrically connected to the signal acquisition system are sequentially arranged in the box body along the length direction of the line connecting the tubing inlet and the tubing outlet; The speed measurement module is used to collect the movement speed and displacement data of the coiled tubing in real time and transmit the data to the signal acquisition system; the two magnetization modules are arranged on both sides of the damage detection module, and the magnetization modules are used to apply magnetic fields of different intensities to the coiled tubing; the damage detection module collects the leakage magnetic field signal data of the coiled tubing and transmits the leakage magnetic field signal data to the signal acquisition system.

7. The test system for multi-size coiled tubing damage detection according to claim 6, characterized in that: Each of the magnetizing modules is composed of two "U"-shaped magnetic cores, and winding coils are wound around the two poles of each magnetic core.

8. The test system for multi-size coiled tubing damage detection according to claim 6, characterized in that: The speed measuring module includes two speed measuring parts respectively arranged above and below the continuous oil pipe, each of the speed measuring parts includes a fixing seat fixedly connected to the inner wall of the box body, a telescopic arm is vertically arranged inside the fixing seat, one end of the telescopic arm is connected to the fixing seat through a spring, and the other end is located outside the fixing seat and a wheel bracket with a door-shaped structure is arranged thereon, a speed measuring wheel for tightly contacting the outer wall of the continuous oil pipe is arranged in the middle of the wheel bracket, the speed measuring wheel is rotatably connected to the wheel bracket through a wheel axle, an encoder is arranged on an outer side wall of the wheel bracket, the rotating shaft of the encoder is synchronously connected to the wheel axle, and the electrical interface of the encoder is electrically connected to the signal acquisition system.

9. The test system for multi-size coiled tubing damage detection according to claim 6, characterized in that: The damage detection module includes a probe mounting tube, the axial direction of the probe mounting tube is in the same direction as the length direction of the main frame, the interior of the probe mounting tube is for the continuous oil pipe to be detected to pass through, a plurality of mounting grooves are evenly arranged on the probe mounting tube at annular intervals, the length direction of each mounting groove is oriented towards the radial direction of the probe mounting tube, and a cover plate is arranged at the tail end of each mounting groove; a probe frame is slidably arranged in each mounting groove, the tail end of each probe frame is fixedly connected to the cover plate through a cylindrical spring, the head end of the probe frame passes through the mounting groove and is located inside the probe mounting tube, a magnetic signal detection probe electrically connected to the signal acquisition system is installed inside the probe frame, the head end of each magnetic signal detection probe is located on the end face of the probe frame head, a top wire steel ball is arranged on both sides of the head end of each magnetic signal detection probe, the outer contour of each top wire steel ball contacts the outer wall of the continuous oil pipe, and a spacing is arranged between the magnetic signal detection probe and the outer wall of the continuous oil pipe to be detected.

10. The test system for multi-size coiled tubing damage detection according to claim 6, characterized in that: The material of the main frame is aluminum alloy; universal wheels and directional wheels are arranged at the bottom of the main frame; 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; a plurality of heat dissipation holes are arranged on the side walls around the box body.

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