Single solenoid type coiled tubing damage detection device

Abstract

The invention provides a single solenoid type coiled tubing damage detection device. The detection device comprises a defect magnetic flux leakage detection module, a speed measurement module, an ovality and wall thickness detection module and an information acquisition card, the defect magnetic flux leakage detection module, the speed measurement module and the ovality and wall thickness detection module are arranged on the coiled tubing; the defect magnetic flux leakage detection module comprises magnetization equipment and detection equipment; the magnetizing device comprises a solenoid; the solenoid surrounds the circumferential direction of the coiled tubing and keeps a distance from the coiled tubing; the detection equipment is positioned in the magnetization equipment; the detection equipment comprises Hall probes which are arranged in the circumferential direction of the coiled tubing and are spaced from the coiled tubing. The speed measurement module comprises a speed measurement roller and an encoder, the speed measurement roller is in contact with the coiled tubing, and the encoder is connected with the speed measurement roller and the information acquisition card; and the ovality and wall thickness detection module can detect the ovality and wall thickness of the coiled tubing in real time. The method has the beneficial effect that the stress distortion area of the coiled tubing can be accurately detected and identified.

Description

Technical Field

[0001] This invention relates to the field of petroleum equipment manufacturing and non-destructive testing technology, specifically to a single-spindle type continuous tubing damage detection device. Background Technology

[0002] Coiled tubing (CT) is a continuous tubing system, ranging from hundreds to thousands of meters in length, made up of many flexible tubes, each hundreds of meters long, welded together using butt welding or bevel welding techniques. It offers advantages such as small diameter, high flexibility, low cost, high efficiency, time savings, and reduced formation damage, and is currently widely used in oil and gas field workover, drilling, completion, logging, oil production, gathering and transportation, and enhanced production operations. However, under the combined effects of high pressure, frequent bending and straightening, and axial tension, coiled tubing is prone to early microscopic fatigue plastic deformation, forming stress distortion zones. As plastic deformation accumulates, it eventually leads to sudden failure. With the increase in deep shale gas and sulfur-containing wells, the failure rate of coiled tubing has climbed from 5.8% to approximately 25% in the past three years, posing a significant challenge to operational risk control and maintenance costs. Fatigue failure is one of the main causes of coiled tubing damage. For example, from 2020 to August 2023, a coiled tubing company used 65 coiled tubing rolls, of which 52 rolls failed due to normal fatigue and 13 rolls failed due to abnormal failure. With the continuous increase in operating pressure, the fatigue life of coiled tubing decreases significantly; the fatigue life at a circulating pressure of 65 MPa is 48.65% lower than that at 50 MPa.

[0003] Meanwhile, various types of defects can exist in coiled tubing, such as corrosion, cracks, mechanical damage, pitting, and other physical defects. The appearance of defects can significantly shorten the service life of coiled tubing, and in severe cases, even lead to downhole accidents. If tubing defects can be detected in a timely manner using detection methods, and measures such as removal or disposal can be taken, the service life of the tubing can be effectively extended, and the occurrence of accidents can be greatly reduced. Therefore, providing a single-spindle type coiled tubing damage detection device is of great significance.

[0004] Chinese patent application number CN202110993119.3, entitled "A Device and Method for Omnidirectional Defect Detection of Coiled Tubing," discloses a device for omnidirectional defect detection of coiled tubing. This device uses a composite probe excitation source of ACFM and MFL to induce a uniform electromagnetic field on the surface of the coiled tubing, acquiring magnetic field distortion signals caused by surface defects. The ACFM array probe detects axial defects in the coiled tubing through eddy current field distortion, while the MFL array probe detects circumferential defects through magnetic field leakage. An encoder synchronously acquires the distance of the corresponding coiled tubing movement. A signal processing module acquires, processes, and intelligently identifies defects using the magnetic field distortion digital signal, finally displaying the defect detection results visually. This overcomes the limitations of single-method directional detection and enables a comprehensive evaluation of the condition of the coiled tubing. However, the structure of this device differs from that of this application. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to solve one or more problems existing in the prior art. For example, one objective of this invention is to provide a single-spindle coiled tubing damage detection device capable of accurately detecting and identifying stress distortion regions in coiled tubing.

[0006] To achieve the above objectives, the present invention provides a single-spindle type coiled tubing damage detection device. The detection device may include: a defect magnetic flux leakage detection module, a velocity measurement module, an ellipticity and wall thickness detection module, and an information acquisition card. The defect magnetic flux leakage detection module, velocity measurement module, and ellipticity and wall thickness detection module are disposed on the coiled tubing. The defect magnetic flux leakage detection module includes a magnetization device and a detection device. The magnetization device includes a solenoid that magnetizes the coiled tubing. The solenoid surrounds the coiled tubing circumferentially and maintains a certain distance from the coiled tubing. The detection device detects defects and early stress distortion areas in the coiled tubing. The detection device is located within the magnetization device. The detection device includes a Hall effect probe, which is disposed circumferentially along the coiled tubing and maintains a certain distance from it. The velocity measurement module includes a velocity measuring roller and an encoder. The velocity measuring roller is in direct contact with the coiled tubing, and the encoder is connected to the velocity measuring roller and the information acquisition card. The ellipticity and wall thickness detection module can detect the ellipticity and wall thickness of the coiled tubing in real time.

[0007] Furthermore, the encoder may include a rotary encoder.

[0008] According to one or more exemplary embodiments of one aspect of the present invention, the magnetizing device may further include a solenoid frame, a continuous oil pipe passing through the solenoid frame, and a solenoid surrounding the solenoid frame.

[0009] According to one or more exemplary embodiments of one aspect of the present invention, the detection device may further include a probe support frame, which is arranged around the circumferential direction of the continuous tubing, and the Hall probe is arranged on the probe support frame.

[0010] According to one or more exemplary embodiments of one aspect of the present invention, the detection device may be provided with a plurality of Hall probes, and each circle may be provided with a plurality of Hall probes.

[0011] Furthermore, the detection device may be equipped with three rings of Hall probes, with 20 Hall probes in each ring.

[0012] According to one or more exemplary embodiments of one aspect of the present invention, the speed measuring module may further include a movable support frame, a connecting shaft, a speed measuring wheel, and a spring, wherein the speed measuring wheel is connected to the speed measuring roller via the spring; the speed measuring roller is connected to the encoder via the connecting shaft; the connecting shaft passes through the movable support frame, and the encoder is disposed on the side wall of the movable support frame.

[0013] According to one or more exemplary embodiments of one aspect of the present invention, the ellipticity and wall thickness detection module may include a hexagonal probe support frame, an electromagnetic ultrasonic thickness measuring probe, and a laser profile probe; the hexagonal probe support frame is sleeved on the continuous tubing, and multiple sets of electromagnetic ultrasonic thickness measuring probes and laser profile probes are arranged on the inner wall of the hexagonal probe support frame.

[0014] According to one or more exemplary embodiments of one aspect of the present invention, the ellipticity and wall thickness detection module may further include a probe baffle, which is arranged circumferentially along the hexagonal probe support frame to form a continuous surface.

[0015] According to one or more exemplary embodiments of one aspect of the present invention, the detection device may include a housing, in which a pipeline channel may be provided, and a continuous oil pipe is provided through the pipeline channel.

[0016] Compared with the prior art, the beneficial effects of the present invention include at least one of the following:

[0017] (1) This invention can accurately detect the speed, displacement, ellipticity and pipe wall thickness of coiled tubing of different diameters in real time, helping users to understand the performance status of coiled tubing in the most intuitive way, and providing a scientific basis for analyzing the failure and scrapping of coiled tubing.

[0018] (2) The present invention can detect various physical defects such as corrosion, cracks, mechanical damage, and pitting of coiled tubing strings, and at the same time realize early warning of stress distortion areas.

[0019] (3) By accurately detecting and identifying the stress distortion region, the present invention can detect the risk of coiled tubing failure in the early stage of fatigue failure, providing support for the prediction of the remaining life of coiled tubing and the decision-making on its use. It can further improve the accuracy of the prediction of the remaining life of coiled tubing, ensure the safety of coiled tubing operation, and reduce the cost of use and maintenance. Attached Figure Description

[0020] The above and other objects and features of the present invention will become clearer from the following description taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1 A schematic diagram of the single-spindle type continuous tubing damage detection device of the present invention is shown.

[0022] Figure 2 A schematic diagram of the detection equipment structure for the defect magnetic flux leakage detection module is shown;

[0023] Figure 3 A frontal cross-sectional view of the defect magnetic flux leakage detection module is shown.

[0024] Figure 4 A schematic diagram of the speed measurement module is shown.

[0025] Figure 5 A schematic diagram of the ellipticity and wall thickness detection module is shown.

[0026] Explanation of key figure labels:

[0027] 1-Box body, 2-Information acquisition card, 3-Ellipticity and wall thickness detection module, 4-Continuous oil pipe, 5-Speed ​​measurement module, 6-Defect magnetic flux leakage detection module, 7-Hall probe, 8-Bolt, 9-Left half of solenoid skeleton, 10-Probe support frame, 11-Right half of solenoid skeleton, 12-Solenoid, 13-Spring, 14-Speed ​​measuring roller, 15-Speed ​​measuring wheel platform, 16-Movable support frame, 17-Encoder, 18-Fixing plate, 19-Probe baffle, 20-Electromagnetic ultrasonic thickness measuring probe, 21-Laser profile probe, 22-Hexagonal probe support frame. Detailed Implementation

[0028] In the following, a single-spindle type continuous tubing damage detection device of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0029] In the description of this application, it should be understood that the terms “middle”, “upper”, “lower”, “left”, “right”, “top”, “bottom”, “inner”, “outer”, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] In the description of this invention, unless otherwise stated, "a plurality of" or "several" means two or more. It should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Exemplary Example 1

[0032] This exemplary embodiment provides a single-sole coiled tubing damage detection device.

[0033] Figure 1 A schematic diagram of the single-spindle type continuous tubing damage detection device of the present invention is shown.

[0034] Figure 2 A schematic diagram of the detection equipment structure for the defect magnetic flux leakage detection module is shown; Figure 3 A frontal cross-sectional view of the defect magnetic flux leakage detection module is shown. Figure 4 A schematic diagram of the speed measurement module is shown.

[0035] Figure 5 A schematic diagram of the ellipticity and wall thickness detection module is shown below. Figures 1 to 5 This exemplary embodiment describes a single-spindle coiled tubing damage detection device.

[0036] like Figure 1 As shown in the exemplary embodiment, the single-spindle coiled tubing damage detection device may include: an information acquisition card 2, a defect leakage magnetic flux detection module 6, a speed measurement module 5, and an ellipticity and wall thickness detection module 3.

[0037] The defect magnetic flux leakage detection module 6, the velocity measurement module 5, and the ellipticity and wall thickness detection module 3 are installed on the coiled tubing 4. The defect magnetic flux leakage detection module 6 includes a magnetization device and a detection device. The magnetization device can uniformly magnetize the coiled tubing 4 under test, and the magnetization device may include, for example... Figure 3The solenoid 12 is shown. The solenoid wraps around the circumference of the coiled tubing and maintains a certain distance from it. The detection equipment is located within the magnetizing device (soleoid). The detection equipment can detect defects and early stress distortion areas in the coiled tubing 4. The detection equipment includes, as shown... Figure 2 The Hall sensor 7 is shown in the diagram. The Hall sensor can be positioned circumferentially along the continuous tubing and maintained at a certain distance from it. The speed measurement module 5 includes, as shown in the diagram... Figure 4 The speed measuring roller 14 (measuring roller) and encoder 17 shown are directly in contact with the continuous tubing 4. This direct contact facilitates the positioning of the continuous tubing 4, and the displacement of the continuous tubing 4 is converted into the number of rotations of the speed measuring roller 14. The encoder 17 is connected to the speed measuring roller 14 and also to the data acquisition card 2. Here, the encoder 17 can be connected to the data acquisition card 2 via a data cable. The encoder 17 can measure the speed and displacement of the continuous tubing 4 under test, and the data can be stored on the data acquisition card 2. The ellipticity and wall thickness detection module can detect the ellipticity and wall thickness of the continuous tubing in real time.

[0038] In this exemplary embodiment, the solenoid and the continuous tubing are kept at a certain distance, for example, 45 to 55 mm.

[0039] Furthermore, the solenoid may include a highly uniform energized solenoid (uniformity 0.1–1%).

[0040] In this exemplary embodiment, the magnetizing device may include a solenoid frame, with a continuous oil tube passing through the solenoid frame and the solenoid disposed on the solenoid frame. For example... Figure 3 As shown, the solenoid frame can be divided into a left half 9 and a right half 11. The left half 9 and the right half 11 of the solenoid frame can be fixed to the probe support frame 10 by bolts 8. The solenoid frame can be used to support the solenoid coil.

[0041] In this exemplary embodiment, as Figure 3 As shown, the detection device may also include a probe support frame 10. The probe support frame 10 is arranged circumferentially around the continuous tubing, and its radial length does not extend to the solenoid. The Hall probe 7 is mounted on the probe support frame 10.

[0042] Furthermore, the probe support frame may be provided with a receiving groove, the inner surface of which forms a receiving space for accommodating the Hall probe. The probe support frame is coaxially and tightly attached to the solenoid frame.

[0043] In this exemplary embodiment, the detection device may be provided with several rings of adjacent Hall probes, and multiple Hall probes may be evenly distributed in one ring. For example, such as Figure 2 As shown, the detection equipment can be equipped with three sets of Hall probes 7 arranged in a ring. Each ring can contain 20 Hall probes.

[0044] In this exemplary embodiment, the magnetization design of the present invention optimizes the high-uniformity solenoid and the anti-interference magnetic field shielding structure to achieve uniform magnetization of the continuous tubing in the detection area, reducing the influence of environmental magnetic field interference on the detection signal. By introducing currents of different magnitudes, combining the advantages of leakage magnetic field detection and metal magnetic memory detection, an excitation magnetic field of a certain intensity (0-5mT) is applied to the continuous tubing using an unsaturated magnetization method to magnetize it to an unsaturated state. This strengthens the magnetic signal related to the stress distortion region while suppressing the influence of interference factors, thereby improving both the detection sensitivity and accuracy of early stress distortion regions and the detection rate of macroscopic defects. Here, the Hall probe detects the magnetic field, while metal magnetic memory detection, without an excitation magnetic field, can identify early stress distortion regions, and leakage magnetic field detection, by applying an external magnetic field, can identify existing defects. Both methods are achieved by using a Hall probe to detect the surrounding magnetic field anomaly region and then processing it using subsequent algorithms. The present invention combines the two methods (leakage magnetic field detection and metal magnetic memory detection).

[0045] In this exemplary embodiment, the speed measuring module may consist of two sets of components arranged symmetrically. One set of components includes a movable support frame, a speed measuring wheel, a measuring roller, an encoder, and a spring.

[0046] In addition to measuring rollers and encoders, such as Figure 4 As shown, the speed measuring module may further include a movable support frame 16, a speed measuring wheel 15, a spring 13, and a connecting shaft. The spring 13 is mounted on the speed measuring wheel 15, and the speed measuring wheel 15 is connected parallel to the speed measuring roller 14 via the spring 13. Parallel connection means that the two are connected horizontally. The speed measuring roller 14 is connected to an encoder 17 via the connecting shaft, which passes through the movable support frame 16. The encoder 17 is mounted on the side wall of the movable support frame 16. The encoder 17 is located below the speed measuring roller 14. Here, the spring can be used in conjunction with the speed measuring roller to adapt to changes in the diameter of different continuous tubing and to provide positioning.

[0047] Furthermore, the encoder may include a rotary encoder.

[0048] In this exemplary embodiment, during the detection process, only the two speed measuring rollers of the speed measuring module are in direct contact with the continuous tubing under test. The detection probe (Hall probe) is placed on the probe support frame and located inside the solenoid frame, maintaining a certain safe gap with the surface of the tubing. This protects it from the influence of external factors such as oil stains and sludge, making detection convenient and providing accurate and reliable data.

[0049] In this exemplary embodiment, as Figure 5As shown, the ellipticity and wall thickness detection module may include a hexagonal probe support frame 22, an electromagnetic ultrasonic thickness probe 20, and a laser profile probe 21. The hexagonal probe support frame 22 is fitted onto the continuous tubing, maintaining a distance of 10–20 mm from it. Multiple sets of electromagnetic ultrasonic thickness probes 20 and laser profile probes 21 are arranged on the inner wall of the hexagonal probe support frame 22.

[0050] Furthermore, the inner wall of the hexagonal probe support frame can be provided with probe receiving slots, with two probe receiving slots on each of the six sides, for a total of 12 probe receiving slots. The electromagnetic ultrasonic thickness measurement probe and the laser profilometry probe are a group, both located on one inner wall surface of the hexagonal probe support frame, within the probe receiving slots.

[0051] In this exemplary embodiment, as Figure 5 As shown, the ellipticity and wall thickness detection module may also include a probe baffle 19. The probe baffle 19 is arranged circumferentially along the hexagonal probe support frame 22 to form a continuous surface.

[0052] Exemplary Example 2

[0053] This exemplary embodiment provides a single-sole coiled tubing damage detection device.

[0054] The single-spindle coiled tubing damage detection device of this exemplary embodiment, based on exemplary embodiment 1, may further include, as in... Figure 1 The housing 1 shown in the figure. That is, the single-spindle type coiled tubing damage detection device of this exemplary embodiment may include: an information acquisition card 2, a defect leakage magnetic flux detection module 6, a speed measurement module 5, an ellipticity and wall thickness detection module 3, and a housing 1.

[0055] In this exemplary embodiment, the information acquisition card, the defect magnetic flux leakage detection module, the velocity measurement module, and the ellipticity and wall thickness detection module are all housed within the enclosure. The defect magnetic flux leakage detection module, the velocity measurement module, and the ellipticity and wall thickness detection module are integrated into a single housing, incorporating multiple detection technologies and offering ease of use.

[0056] In this exemplary embodiment, as Figure 1 As shown, the information acquisition card 2 can be fixed to the inner wall of the top of the box 1.

[0057] In this exemplary embodiment, the speed measuring wheel, encoder, and movable support frame can be fixed to the inner wall of the housing by bolts.

[0058] In this exemplary embodiment, the ellipticity and wall thickness detection module can be implemented through, for example... Figure 5 The fixing plate 18 shown is installed on the inner wall of the box and is located on one side of the hexagonal probe support frame 22.

[0059] In this exemplary embodiment, a pipeline channel may be provided in the housing, and a continuous oil pipe is provided through the pipeline channel.

[0060] like Figures 1-5 As shown, the method of using / operating process of the single-sowary coiled tubing damage detection device of the present invention may include:

[0061] When the coiled tubing 4 under test passes through the detection device, the speed measuring roller 14 is first positioned by the spring 13. The speed measuring roller 14 is driven to rotate by the coiled tubing 4, and the number of rotations of the speed measuring roller 14 is transmitted to the encoder 17 through the connecting shaft. The number of rotations is converted into an analog signal by the encoder 17 and transmitted to the information acquisition card 2 for storage (this signal can be processed by the host computer to obtain displacement and speed). At this time, the speed measuring roller 14 drives the encoder 17 to move in the guide rail of the movable support frame 16 (the movable support frame can also be called the guide rail), maintaining the stable operation of the encoder 17. The solenoid 12 in the defect leakage magnetic field detection module 6 is energized to generate a magnetic field, magnetizing the coiled tubing 4 under test. At the same time, the Hall probe 7 in the probe support frame 10 collects the magnetic field signal and transmits it to the information acquisition card 2 through the data line. The ellipticity and wall thickness detection module 3 detects the wall thickness and profile of the coiled tubing 4 under test through the electromagnetic ultrasonic thickness measuring probe 20 and the laser profile probe 21, and transmits the data to the information acquisition card 2 for storage.

[0062] In summary, the beneficial effects include:

[0063] This invention provides a single-helix coiled tubing damage detection device, primarily applied in the fields of petroleum equipment manufacturing and non-destructive testing. The single-helix coiled tubing damage detection device can detect various physical defects in coiled tubing strings, such as corrosion, cracks, mechanical damage, and pitting; provide early warning of stress distortion regions; and perform real-time and accurate detection of velocity, displacement, ellipticity, and pipe wall thickness for coiled tubing of different diameters. This helps users intuitively understand the performance status of the coiled tubing, providing a scientific basis for analyzing coiled tubing failure and its eventual scrapping. Simultaneously, through accurate detection and identification of stress distortion regions, it can identify coiled tubing failure risks in the early stages of fatigue damage, providing support for predicting the remaining service life of coiled tubing and making usage decisions. This can further improve the accuracy of remaining service life prediction, ensure the safety of coiled tubing operations, and reduce usage and maintenance costs.

[0064] Although a single-spindle coiled tubing damage detection device of the present invention has been described above in conjunction with exemplary embodiments, those skilled in the art should understand that various modifications and changes can be made to the exemplary embodiments of the present invention without departing from the spirit and scope defined by the claims.

Claims

1. A single solenoid coiled tubing damage detection device, characterized by, The detection device comprises a defect magnetic flux leakage detection module, a speed measurement module, an ovality and wall thickness detection module and an information acquisition card, wherein The defect magnetic flux leakage detection module, the speed measurement module and the ovality and wall thickness detection module are arranged on the coiled tubing. The defect magnetic flux leakage detection module comprises a magnetization device and a detection device; the magnetization device comprises a solenoid which magnetizes the coiled tubing and is arranged in the circumferential direction of the coiled tubing and at a certain distance from the coiled tubing; the detection device detects defects and early stress distortion areas of the coiled tubing and is arranged in the magnetization device; the detection device comprises a Hall probe which is arranged in the circumferential direction of the coiled tubing and at a certain distance from the coiled tubing; The speed measurement module comprises a speed measurement roller and an encoder; the speed measurement roller is in direct contact with the coiled tubing; the encoder is connected with the speed measurement roller and the information acquisition card. The ovality and wall thickness detection module can detect the ovality and wall thickness of the coiled tubing in real time.

2. The single-solenoid coiled tubing damage detection apparatus of claim 1, wherein, The encoder comprises a rotary encoder.

3. The single-solenoid coiled tubing damage detection apparatus of claim 1, wherein, The magnetization device further comprises a solenoid skeleton, the coiled tubing is arranged in the solenoid skeleton, and the solenoid is arranged around the solenoid skeleton.

4. The single-solenoid coiled tubing damage detection apparatus of claim 1, wherein, The detection device further comprises a probe support frame which is arranged in the circumferential direction of the coiled tubing, and the Hall probe is arranged on the probe support frame.

5. The single-solenoid coiled tubing damage detection apparatus of claim 1, wherein, A plurality of circles of Hall probes are arranged in the detection device, and each circle comprises a plurality of Hall probes.

6. The single-solenoid coiled tubing damage detection apparatus of claim 5, wherein, Three circles of Hall probes are arranged in the detection device, and each circle comprises 20 Hall probes.

7. The single-solenoid coiled tubing damage detection apparatus of claim 1, wherein, The speed measurement module further comprises a movable support frame, a connecting shaft, a speed measurement roller table and a spring, wherein The speed measurement roller table is connected with the speed measurement roller through the spring; The speed measurement roller is connected with the encoder through the connecting shaft; The connecting shaft passes through the movable support frame, and the encoder is arranged on the side wall of the movable support frame.

8. The single-solenoid coiled tubing damage detection apparatus of claim 1, wherein, The ovality and wall thickness detection module comprises a hexagonal probe support frame, electromagnetic ultrasonic thickness measurement probes and laser profile probes; the hexagonal probe support frame is sleeved on the coiled tubing, and a plurality of groups of electromagnetic ultrasonic thickness measurement probes and laser profile probes are arranged on the inner wall of the hexagonal probe support frame.

9. The single-solenoid coiled tubing damage detection apparatus of claim 8, wherein, The ovality and wall thickness detection module further comprises a probe baffle which is arranged in the circumferential direction of the hexagonal probe support frame to form a continuous surface.

10. The single-solenoid coiled tubing damage detection apparatus of claim 1, wherein, The detection device comprises a box body, a pipeline channel is arranged in the box body, and the coiled tubing is arranged in the pipeline channel.

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