A multi-layer flexible composite pipe lining defect detection system

Abstract

This patent discloses a multi-layer flexible composite pipe lining defect detection system, comprising a detection unit mounting base, a front roller support base, a rear roller support base, a support connecting rod, a roller support, an optical scanner base, an optical scanner, a data transmission line, and a data analysis unit. The detection unit mounting base integrates three front roller support bases and three rear roller support bases, spaced 120 degrees apart from each other. Six roller supports and support connecting rods are mounted between the two support bases. The optical scanner base is mounted on the rear roller support base. The optical scanner is bolted to the optical scanner base. The data analysis unit collects detection data via the data transmission line to generate detection results. This multi-layer flexible composite pipe lining defect detection system is simple and convenient to operate. It uses laser ranging and optical measurement technology to detect the lining of fracturing flexible pipes and is effective in multi-layer flexible composite pipe lining defect detection operations.

Description

Technical Field

[0001] The present invention relates to a multi-layer composite pipe defect detection system, in particular to an optical measurement and laser scanning detection system. Background Art

[0002] In recent years, with the increase in the number of oil wells drilled, fracturing operations have become increasingly common in well completion projects. Multi-layer flexible composite fracturing tubing is a crucial tool in fracturing operations, serving as a means of transporting fracturing fluid. It offers advantages such as simplified fracturing site operations, rapid disassembly and assembly, flexible stress buffering, vibration absorption, reduced connection points, and reduced leakage risk. However, after prolonged use, the inner lining of multi-layer flexible composite tubing can erode. This not only shortens the service life of the tubing and its associated equipment, but can also lead to pipeline failure and leakage of fracturing fluid, posing a significant safety hazard. Therefore, regular safety inspections of multi-layer flexible composite tubing are necessary to detect defects in the inner lining and determine whether replacement tubing is necessary.

[0003] Existing methods for detecting defects in the inner lining of multi-layer flexible composite pipes primarily involve testing the wall thickness of the critical section and endoscopic inspection. The critical section wall thickness detection method uses an ultrasonic thickness gauge to measure the wall thickness of the critical section. If the thickness is below the recommended limit for the critical section wall thickness, the test result is deemed unqualified. This detection method involves spot sampling, resulting in random results and not guaranteed to be completely accurate. Endoscopic inspection detects inner wall wear. If the inner lining is observed to have eroded to the warning layer, the hose should be removed from service and replaced with a new one. Patents CN112460344A disclose a wear-resistant hose assembly for fracturing operations, CN215258312U discloses a detectable hose, and CN215258311U discloses a wear-resistant and detectable hose. These flexible pipes are designed with a detection layer, allowing for endoscope inspection of defects. However, due to the limited field of view of the endoscopic equipment, inspection using endoscopic inspection requires multiple angles, which can affect the detection results. Therefore, the operator's experience level can also affect the inspection results. In addition to the above two methods, patent CN114183122A discloses a device for detecting the depth of corrosion on the inner wall of a cementing and fracturing manifold, which is also designed to detect defects. However, the internal size and space of a multi-layer flexible composite pipe with a smaller inner diameter are limited. The device is designed with a roller with a built-in drive motor, which makes it too large and inconvenient to enter the interior of the pipe for detection. Its imaging module and depth measurement module are divided into two parts, resulting in a time difference between the two modules during operation, and the same position is not detected at the same time. When detecting the curved part of the pipe, the detection result is inaccurate due to the uncertain position and radius of the curve. The above processing methods have problems such as inaccurate detection results and large influence of human factors. A detection system is needed that can produce clear, accurate and reliable detection results and is not affected by the bending shape of the composite pipe. The system needs to be able to adapt to flexible composite pipes of multiple inner diameter sizes, have a simple and stable structure, a small overall volume, and have the power to move inside the composite pipe.

[0004] Therefore, in order to meet the above needs, it is urgent to propose a detection system for defects in the lining layer of multi-layer flexible composite pipes. Summary of the Invention

[0005] In order to address the deficiencies of the prior art, the purpose of the present application is to provide a defect detection system which has a stable structure and can detect defects in the lining layer of a multi-layer flexible composite pipe.

[0006] To achieve the above-mentioned purpose, the present application adopts a technical solution for a multi-layer flexible composite pipe lining defect detection system. The system mainly includes a detection unit mounting seat, a front roller bracket seat, a rear roller bracket seat, a bracket connecting rod, a roller bracket, an optical scanner base, an optical scanner, a data transmission line, a multi-layer flexible composite pipe, a data analysis unit, a pull ring, a towing rope, a power reel, etc.; it is characterized in that three front roller bracket seats are installed at the front end of the detection unit mounting seat through bolt A, and three rear roller bracket seats are installed at the rear end; a spring and a spring pressure block are arranged inside each roller bracket; there are a total of 6 bracket connecting rods in the system, one end of each bracket connecting rod is hinged to the spring pressure block through axis B, and the other end is hinged to the detection unit mounting seat through axis C. The detection unit is hinged; three pull rings are provided on the front end of the detection unit mounting base. The pull rings are pulled by a tow rope pre-threaded through the multi-layer flexible composite tube. The other end of the tow rope is connected to a power reel, which moves the detection unit forward within the multi-layer flexible composite tube. Since the detection unit is not designed with a drive mechanism, the detection unit is reduced in size and can accommodate multi-layer flexible composite tubes with smaller inner diameters. The optical scanner base is connected to the rear roller bracket base via bolts B. The optical scanner is mounted on the optical scanner base via bolts C. The optical scanner emits a grating and a ranging laser, and captures and collects grating shape change data and laser ranging data. The input end of the data transmission line is connected to the optical scanner, and the output end is connected to the data analysis unit. The data analysis process is as follows:

[0007] S1: The data analysis unit collects data and analyzes the grating shape change data and laser ranging data captured by the optical scanner;

[0008] S2: Establish a three-dimensional actual model of the lining layer of the multi-layer flexible composite pipe;

[0009] S3: Compare and analyze the actual model with the standard size model to find the defect location, size and depth of the lining layer, and then compare with the corresponding safety use standards;

[0010] S4: Finally, the test result of whether the pipeline can continue to be used is obtained.

[0011] Furthermore, the optical scanner combines optical measurement and laser scanning technology in one, and can emit a measuring grating through a grating transmitter and capture the shape change data of the grating through a camera. At the same time, the laser ranging sensor inside the optical scanner measures the distance to obtain laser ranging data, and then the optical scanner transmits the shape change data and distance data to the data analysis unit through a data transmission line.

[0012] Furthermore, springs and spring pressure blocks are installed inside the six roller brackets, and the rollers are hinged at the ends through shaft C. Two shaft elastic retaining rings A are set at both ends of each shaft C, totaling 12; the rollers on the roller brackets are provided with elastic force through the springs inside the brackets, so that the optical scanner and the multi-layer flexible composite tube remain coaxial as much as possible, and can adapt to multi-layer flexible composite tubes of different inner diameters through spring expansion and contraction.

[0013] Furthermore, a total of three shafts A are installed between two adjacent seats in each group of the three front roller bracket seats, and three roller brackets are hinged on the three shafts A respectively; a total of three shafts A are installed between two adjacent seats in each group of the three rear roller bracket seats, and three roller brackets are hinged on the three shafts A respectively; each shaft A is provided with shaft elastic rings A at both ends, totaling 12.

[0014] Furthermore, one end of the optical scanner base is connected to the rear roller bracket seat through a bolt B, and the other end is connected to the optical scanner through a bolt C.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The above-mentioned multi-layer flexible composite pipe lining defect detection system can combine optical measurement technology, laser scanning technology and computer data analysis to quickly scan and model the multi-layer flexible composite pipe lining and detect lining defects;

[0017] (2) The optical scanner integrates optical measurement technology and laser scanning technology, which improves the detection accuracy and efficiency, and the detection results are accurate without missing any areas;

[0018] (3) The detection unit has a simple structure, strong stability and reliability, and a small overall size. A spring is designed inside the roller bracket to ensure that the structure has no interference and can adapt to flexible composite pipes with various inner diameters. It provides a new operation method for the defect detection of the lining layer of multi-layer flexible composite pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the main structure diagram of the system;

[0020] Figure 2 This is the flow chart of composite pipe lining defect detection in this system;

[0021] Figure 3 This is a partial view of the roller bracket of this system;

[0022] Figure 4 This is a partial view of the mounting base of this system;

[0023] Figure 5 A partial view of the optical scanner installation for this system;

[0024] Markings in the figure: 1-detection unit mounting seat, 2-front roller bracket seat, 3-rear roller bracket seat, 4-bracket connecting rod, 5-roller bracket, 6-optical scanner base, 7-optical scanner, 8-axis A, 9-axis B, 10-bolt A, 11-bolt B, 12-bolt C, 13-data transmission line, 14-multi-layer flexible composite pipe, 15-data analysis unit, 16-pull ring, 17-drag rope, 18-spring pressure block, 19-spring, 20-roller, 21-axis C, 22-axis D, 23-elastic retaining ring A for axis, 24-elastic retaining ring B for axis, 25-power reel. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the implementation manner of the present application will be clearly and completely described below in conjunction with the drawings in the present application.

[0026] This embodiment discloses a multi-layer flexible composite pipe lining defect detection system for multi-layer flexible composite pipe lining defect detection operations, such as Figure 1 As shown, the detection unit mounting seat 1, the front roller bracket seat 2, the rear roller bracket seat 3, the bracket connecting rod 4, the roller bracket 5, the optical scanner base 6, the optical scanner 7, the shaft A8, the shaft B9, the bolt A10, the bolt B12, the data transmission line 13, the multi-layer flexible composite tube 14, the data analysis unit 15, the pull ring 16, the towing rope 17, the spring pressure block 18, the spring 19, the roller 20, the shaft C21, the shaft D22, the shaft elastic retaining ring A23, the shaft elastic retaining ring B24, and the power reel 25. The front end of the detection unit mounting seat 1 is installed with three front roller bracket seats 2 through bolts A10, and the rear end is installed with three rear roller bracket seats 3; each roller bracket 5 is provided with a spring 19 and a spring pressure block 18; there are a total of 6 bracket connecting rods 4 in the system, one end of each bracket connecting rod 4 is hinged to the spring pressure block 18 through the shaft B9, and the other end is hinged to the detection unit mounting seat 1 through the shaft C21; the front end of the detection unit mounting seat 1 is provided with three pull rings 16, which are pulled by a towing rope 17 that has been pre-passed through the multi-layer flexible composite tube 14, and the other end of the towing rope 17 is connected to the power reel 25 , so that the detection unit moves forward in the multi-layer flexible composite tube 14. Since the detection unit part is not designed with a driving mechanism, the volume of the detection unit is reduced and can adapt to the multi-layer flexible composite tube 14 with a smaller inner diameter; the optical scanner base 6 is connected to the rear roller bracket seat 3 by the bolt B11; the optical scanner 7 is installed on the optical scanner base 6 by the bolt C12, and the optical scanner 7 emits a grating and a ranging laser, and captures and collects the grating shape change data and the laser ranging data; the input end 131 of the data transmission line 13 is connected to the optical scanner 7, and the output end 132 is connected to the data analysis unit 15.

[0027] This embodiment discloses a multi-layer flexible composite pipe lining defect detection system, such as Figure 2 As shown, an optical scanner and a data analysis unit are used to detect defects in the lining of a multi-layer flexible composite pipe. Specifically, the optical scanner 7 scans the lining of the multi-layer flexible composite pipe. The scanned data is transmitted to the data analysis unit 15 via a data transmission line 13. The data analysis unit 15 collects the data and analyzes the grating shape change data captured by the optical scanner 7 and the laser ranging data. This data is used to build a three-dimensional actual model of the lining of the multi-layer flexible composite pipe 14. The actual model is compared with a standard-size model to determine the location, size, and depth of the lining defects. This is then compared with the corresponding safety standards to determine whether the pipe can continue to be used. This detection method is highly efficient, eliminates missed areas, and provides accurate test results with clear output display. The number of grating emitters on the optical scanner 7 can be adjusted to a range of 4 to 6 for multi-layer flexible composite pipes with different inner diameters to improve the accuracy of the test results and adapt to the inspection of the lining of multi-layer flexible composite pipes with different inner diameters.

[0028] This embodiment discloses a multi-layer flexible composite pipe lining defect detection system, such as Figure 3 As shown, a spring 19 and a spring pressure block 18 are installed inside the roller bracket 5. The spring pressure block 18 is hinged to the bracket connecting rod 4 through the axis B9. The angle of the roller bracket 5 can be adjusted by compressing the spring. A total of 6 roller brackets 5 are designed for the detection system, so that the optical scanner 7 is kept in the middle position of the multi-layer flexible composite tube and is as coaxial as possible with the multi-layer flexible composite tube 14. The spring 19 can be extended and retracted to adapt to multi-layer flexible composite tubes of different inner diameters.

[0029] This embodiment discloses a multi-layer flexible composite pipe lining defect detection system, such as Figure 4 As shown, the main body of the detection unit mounting seat 1 is designed to be a regular hexahedron, and three front roller bracket seats 2 are installed on the detection unit mounting seat 1 by bolts A10, with an angle of 120° between two adjacent ones; the roller bracket 5 is installed between two adjacent front roller bracket seats 2 through the axis A8; three pull rings 16 are provided on the front end of the detection unit mounting seat 1, and the pull ring 16 can be pulled by a towing rope 17 that has been pre-passed through the multi-layer flexible composite tube 14, and the other end of the towing rope 17 is connected to the power reel 25, so that the detection unit moves forward in the multi-layer flexible composite tube 14.

[0030] This embodiment discloses a multi-layer flexible composite pipe lining defect detection system, such as Figure 5 As shown, the optical scanner 7 is mounted on the optical scanner base 6 via bolts C12, and the optical scanner base 6 is connected to the rear roller bracket seat 3 via bolts B11.

Claims

1. A multi-layer flexible composite pipe inner lining defect detection system, mainly divided into two parts: a detection device and an analysis unit, including a detection unit mounting seat (1), a front roller bracket seat (2), a rear roller bracket seat (3), a bracket connecting rod (4), a roller bracket (5), an optical scanner base (6), an optical scanner (7), a data transmission line (13), a multi-layer flexible composite pipe (14), a data analysis unit (15), a pull ring (16), a towing rope (17), a power reel (25), etc.; characterized in that, The front end of the detection unit mounting seat (1) is mounted with three front roller bracket seats (2) through bolts A (10), and the rear end is mounted with three rear roller bracket seats (3); each roller bracket (5) is provided with a spring (19) and a spring pressure block (18); the six roller brackets (5) are hinged to rollers (20) at the ends through shafts C (21), and two shaft elastic retaining rings A (23) are provided at both ends of each shaft C (21), totaling 12; the rollers (20) on the roller brackets (5) are provided with elastic force provided by the springs (19) inside the brackets, so that the optical scanner (7) and the multi-layer flexible composite tube (14) are kept coaxial as much as possible, thereby achieving a stable anti-vibration effect for the optical scanner (7), and the springs (19) are extended and retracted to adapt to the bending multi-layer flexible composite tubes (14) of different inner diameters; there are a total of six bracket connecting rods (4) in the system, and one end of each bracket connecting rod (4) is connected to the spring pressure block ( 18) is hinged, and the other end is hinged to the detection unit mounting seat (1) through the shaft C (21); three pull rings (16) are provided on the front end of the detection unit mounting seat (1), and the pull rings (16) are pulled by the towing rope (17) pre-passed through the multi-layer flexible composite tube (14), and the other end of the towing rope (17) is connected to the power reel (25), so that the detection unit moves forward in the multi-layer flexible composite tube (14), avoiding the equipment deflection caused by single-point traction; the optical scanner base (6) is connected to the rear roller bracket seat (3) through the bolt B (11); the optical scanner (7) is installed on the optical scanner base (6) through the bolt C (12), and the optical scanner (7) emits grating and ranging laser, and captures and collects grating shape change data and laser ranging data; the input end (131) of the data transmission line (13) is connected to the optical scanner (7), and the output end (132) is connected to the data analysis unit (15); the data analysis process is as follows: S1: The data analysis unit (15) collects data and analyzes the grating shape change data and laser ranging data captured and collected by the optical scanner (7); S2: establishing a three-dimensional actual model of the inner lining layer of the multi-layer flexible composite pipe (14); S3: Compare and analyze the actual model with the standard size model to find the defect location, size and depth of the lining layer, and then compare them with the corresponding safety standards; S4: Finally, the test result of whether the pipeline can continue to be used is obtained.

2. The multi-layer flexible composite pipe lining defect detection system according to claim 1, characterized in that: The optical scanner (7) combines optical measurement and laser scanning technology in one, and can emit a measuring grating through a grating transmitter and capture the shape change data of the grating through a camera. At the same time, the laser ranging sensor inside the optical scanner (7) measures the distance to obtain laser ranging data. Then, the optical scanner (7) transmits the shape change data and distance data to the data analysis unit (15) through a data transmission line (13).

3. The multi-layer flexible composite pipe lining defect detection system according to claim 1, characterized in that: A total of three shafts A (8) are installed between two adjacent shafts in each group of the three front roller bracket seats (2), and three roller brackets (5) are hingedly connected to the three shafts A (8); a total of three shafts A (8) are installed between two adjacent shafts in each group of the three rear roller bracket seats (3), and three roller brackets (5) are hingedly connected to the three shafts A (8); and each shaft A (8) is provided with a shaft elastic retaining ring A (23) at both ends, with a total of 12 shaft elastic retaining rings A (23).

4. The multi-layer flexible composite pipe lining defect detection system according to claim 1, characterized in that: One end of the optical scanner base (6) is connected to the rear roller bracket seat (3) through a bolt B (11), and the other end is connected to the optical scanner (7) through a bolt C (12).

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