Multi-layer tubular column corrosion detection morphology simulation device and tester verification method

Abstract

The invention discloses a multilayer tubular column corrosion detection morphology simulation device, which comprises an oil sleeve assembly, a sleeve hoisting assembly, a tester traction device and a control and data acquisition system, and is characterized in that the oil sleeve assembly is used for installing and fixing a tubular column to be tested; the casing hoisting assembly is used for hoisting the oil casing assembly and changing the inclination angle of the to-be-detected pipe column; the tester traction equipment is used for dragging a tester arranged in the to-be-tested tubular column; and the control and data acquisition system is used for controlling starting or stopping of the sleeve hoisting assembly and the tester traction equipment, and is also used for acquiring detection data of the tester. The corrosion detection work under different well deviation working conditions can be realized. According to the tester verification method, the device is adopted, corrosion detection can be performed on the standard sample tubular column under different working conditions, then the difference between detection data and standard data is compared, and then whether the precision of the verified tester meets the requirement or not can be effectively judged.

Description

Technical Field

[0001] This invention relates to the field of tubular corrosion detection technology, specifically to a multilayer tubular corrosion detection morphology simulation device and a testing instrument calibration method. Background Technology

[0002] As oil and gas development continues, casing and tubing damage is becoming increasingly complex, making high-precision casing and tubing damage detection a key technology for improving oil and gas recovery. Currently, the industry commonly uses techniques such as multi-arm caliper imaging, magnetic wall thickness measurement, multi-layer tubing string imaging, and magnetic focusing to detect casing and tubing defects in the well. However, due to the well inclination angle, logging instruments exhibit eccentricity during downhole detection, often resulting in data discrepancies. Furthermore, the lack of standardized data interpretation software among different companies leads to discrepancies between the detection results and the actual corrosion morphology. Therefore, to verify the accuracy of logging instruments, a multi-layer tubing string corrosion detection verification simulation experimental device is urgently needed. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-layer tubing corrosion detection morphology simulation device and a testing instrument calibration method. The morphology simulation device can simulate the corrosion morphology of multi-layer tubing on the ground, effectively avoiding complex downhole operations. At the same time, the testing instrument calibration method can effectively utilize the above-mentioned morphology simulation device to perform calibration work on different testing instruments, thereby verifying the accuracy of the testing instruments.

[0004] This invention is achieved through the following technical solution:

[0005] A multi-layer tubing string corrosion detection morphology simulation device includes an oil casing assembly, a casing lifting assembly, a test instrument traction device, and a control and data acquisition system. The oil casing assembly is used to install and fix the tubing string to be tested; the casing lifting assembly is used to lift the oil casing assembly and change the inclination angle of the tubing string to be tested; the test instrument traction device is used to pull the test instrument installed inside the tubing string to be tested; the control and data acquisition system is used to control the start and stop of the casing lifting assembly and the test instrument traction device, and also to collect the detection data of the test instrument. To solve the above-mentioned technical problems and achieve the corresponding technical effects, the morphology simulation device uses the casing lifting assembly to drive the oil casing assembly, thereby changing the inclination angle of the tubing string to be tested, thus simulating different well inclination conditions on the ground, and enabling corrosion detection under different well inclination conditions.

[0006] Further technical solutions:

[0007] The oil casing assembly includes a rotating platform and an oil casing box. The oil casing box is installed and fixed on the rotating platform, and the test string is disposed inside the oil casing box.

[0008] The casing lifting assembly is connected to the rotating platform, and the casing lifting assembly drives the rotating platform to rotate in the vertical plane.

[0009] Furthermore: one end of the rotating platform is configured as a rotating end, and the other end of the rotating platform is configured as a flipping end;

[0010] The flipping end rotates upward in a vertical plane around the rotating end under the drive of the sleeve lifting assembly, and the flipping angle of the rotating end is in the range of 0 to 90°.

[0011] Furthermore: the traction rope of the test instrument traction device enters the test column from the flip end, and the traction rope is connected to the test instrument, driving the test instrument to slide inside the test column;

[0012] The flipping end is equipped with an inlet pulley. One end of the traction rope is wound around the shaft of the first electric winch, and the other end of the traction rope enters the test column along the axis of the test column after passing through the inlet pulley.

[0013] Furthermore, the inner cavity of the casing box is provided with several stabilizers. One side of the stabilizer is fixed to the inner wall of the casing box, and the other side of the stabilizer is abutted against the outer wall of the test string. The test string coincides with the axis of the casing box.

[0014] Furthermore: the casing lifting assembly includes a ground support frame, a vertical support frame, and a top mounting frame. The ground support frame is fixed to the ground, and the vertical support frame is vertically mounted on the ground support frame. The top mounting frame is located on the top of the vertical support frame.

[0015] A second electric winch is installed inside the top mounting frame. A lifting rope is wound around the shaft of the second electric winch. The connector of the lifting rope is connected to the rotating platform, and when the lifting rope is retracted, it drives the rotating end of the rotating platform to flip upward.

[0016] Furthermore: a hinged bracket is provided at the intersection of the ground support frame and the vertical support frame, and the rotating end of the rotating platform is hinged to the hinged bracket;

[0017] The rotating platform rotates within the angle range between the ground support frame and the vertical support frame.

[0018] A calibration method for a multilayer tubular corrosion detection instrument is disclosed. The instrument is calibrated using a multilayer tubular corrosion detection morphology simulation device. By performing corrosion detection on a standard sample tubular under different operating conditions and then comparing the difference between the detection data and the standard data, the accuracy of the calibrated instrument can be effectively determined.

[0019] The specific steps are as follows:

[0020] Step S1: Prepare a standard sample column and set several defect points of different types and sizes on the standard sample column;

[0021] Step S2: Assembly of standard sample tube and device: Fix the standard sample tube into the oil casing box, and put the tester connected to the traction rope into the standard sample tube. At the same time, connect the lifting rope to the rotating platform.

[0022] Step S3: Adjust the tilt angle of the standard sample tube column, and start the second electric winch to drive the rotating end of the rotating platform to rotate upward to the required angle for testing;

[0023] Step S4: Corrosion defect detection and data acquisition. Start the first electric winch to drive the tester to move to the defect point for defect detection, and transmit the detection data to the control and data acquisition system for processing.

[0024] Step S5: Analyze and record the detection data.

[0025] Furthermore: Several defect points are set at equal intervals on the standard sample tube column, and the position and size information of each defect point are recorded to form defect standard data. In step S5, the detected defect point data is compared with the defect standard data in step 1. If the difference between the detected defect point data and the defect standard data is not within the allowable error range, the test instrument verification is inaccurate. If the difference between the detected defect point data and the defect standard data is within the allowable error range, the test instrument verification is accurate.

[0026] Furthermore: In step S3, the standard sample column can be adjusted to different tilt angles, and then steps S4 and S5 can be completed to verify the accuracy of the tester under different tilt angles.

[0027] After completing the calibration of one tester, another tester can be replaced in step S2, and steps S3 to S5 can be executed to complete the calibration of the accuracy of the other tester.

[0028] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0029] 1. The present invention provides a multi-layer tubing corrosion detection morphology simulation device. The morphology simulation device drives the oil casing assembly through the casing lifting assembly to change the inclination angle of the tubing string under test, thereby simulating different well inclination conditions on the ground, thus enabling corrosion detection under different well inclination conditions.

[0030] 2. The present invention provides a calibration method for a multilayer tubular corrosion detection instrument. The instrument is calibrated using a multilayer tubular corrosion detection morphology simulation device. By performing corrosion detection on standard sample tubular sections under different working conditions, and then comparing the difference between the detection data and the standard data, the accuracy of the calibrated instrument can be effectively determined. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of the present invention;

[0033] Figure 2 This is a cross-sectional view of the oil casing assembly structure;

[0034] Figure 3 This is a schematic diagram of the casing lifting assembly structure;

[0035] Figure 4 for Figure 3 A partial structural diagram of section A;

[0036] Figure 5 This is a schematic diagram of the traction equipment for the testing instrument.

[0037] Figure 6 This is a flowchart of the verification method in Example 2.

[0038] The attached diagram shows the markings and corresponding component names:

[0039] 1-Casing assembly, 2-Casing lifting assembly, 3-Testing instrument traction equipment, 4-Control and data acquisition system, 5-Test string, 6-Testing instrument, 11-Rotating platform, 12-Casing box, 13-Fixed pulley, 14-Center, 21-Ground support frame, 22-Vertical support frame, 23-Top mounting frame, 24-Second electric winch, 25-Lifting rope, 26-Hinged bracket, 31-Traction rope, 32-First electric winch. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0041] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other embodiments, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0042] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] In the description of this invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" 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 invention 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 limiting the scope of protection of this invention.

[0044] Example:

[0045] like Figures 1-5As shown, the present invention discloses a multi-layer tubing corrosion detection morphology simulation device, comprising an oil casing assembly 1, a casing lifting assembly 2, a testing instrument traction device 3, and a control and data acquisition system 4. The oil casing assembly 1 is used to install and fix the tubing 5 to be tested; the casing lifting assembly 2 is used to lift the oil casing assembly 1 and change the tilt angle of the tubing 5 to be tested; the testing instrument traction device 3 is used to traction the testing instrument 6 installed inside the tubing 5 to be tested; the control and data acquisition system 4 is used to control the start-up or shutdown of the casing lifting assembly 2 and the testing instrument traction device 3, and the control and data acquisition system 4 is also used to collect the detection data of the testing instrument 6. In this embodiment, the casing assembly 1 can adjust its tilt angle under the drive of the casing lifting assembly 2, thereby simulating different well inclination conditions of the tubing string downhole. Then, the testing instrument traction device 3 drives the testing instrument 6 to slide inside the tubing string 5 to be tested, and detects corrosion defects inside the tubing string 5. The detected data is transmitted to the data acquisition module of the control and data acquisition system 4 for data analysis and processing, thereby enabling the tubing string corrosion detection work to simulate different well inclination conditions.

[0046] In this embodiment, the specific oil casing assembly 1 includes a rotating platform 11 and an oil casing box 12. The oil casing box 12 is installed and fixed on the rotating platform 11, and the test tube 5 is disposed inside the oil casing box 12. The casing lifting assembly 2 is connected to the rotating platform 11, and the casing lifting assembly 2 drives the rotating platform 11 to rotate in a vertical plane. The oil casing box 12 can realize the installation and fixation of the test tube 5 and ensure the stability of the experimental environment in which the test tube 5 is located. In this embodiment, the preferred oil casing box 12 is made of aluminum alloy, which can effectively avoid electromagnetic interference, thereby enhancing the accuracy of the experiment. Furthermore, in order to realize the adjustment of the tilt angle of the test tube 5, one end of the rotating platform 11 is set as a rotating end, and the other end of the rotating platform 11 is a flipping end. The flipping end is driven by the casing lifting assembly 2 to flip upward in a vertical plane around the rotating end, and the flipping angle range of the rotating end is 0 to 90°. The casing lifting assembly 2 drives the rotating platform 11 to tilt, thereby adjusting the inclination angle of the test tubing string 5 and simulating various well deviation conditions. To enhance the stability of the connection between the rotating platform 11 and the casing box 12, multiple sets of clamps can be used to fasten the casing box 12 to the rotating platform 11, preventing the casing box 12 from shifting or falling off during rotation.

[0047] The traction rope 31 of the testing instrument traction device 3 enters the test column 5 from the flip end, and the traction rope 31 is connected to the testing instrument 6, driving the testing instrument 6 to slide within the test column 5. In this embodiment, the testing instrument 6 is pulled to the defect point within the test column 5 by the testing instrument traction device 3, and the control and data acquisition system 4 controls the testing instrument traction device 3 to ensure the accurate positioning rate of the testing instrument 6, thereby enabling the testing instrument 6 to perform defect detection on the defect point. Furthermore, the flip end is equipped with an inlet pulley 13. One end of the traction rope 31 is wound around the shaft of the first electric winch 32, and the other end of the traction rope 31 enters the test column 5 along the axial direction of the test column 5 after passing through the inlet pulley 13. At this time, the setting of the pulley 13 ensures that the traction rope 31 does not contact the test column 5 or other structures, thus not affecting its traction effect.

[0048] To ensure the coaxiality of the casing box 12 and the test string 5, in this embodiment, a plurality of stabilizers 14 are provided in the inner cavity of the casing box 12. One side of the stabilizer 14 is fixed to the inner wall of the casing box 12, and the other side of the stabilizer 14 is abutted against the outer wall of the test string 5, and the axis of the test string 5 coincides with that of the casing box 12.

[0049] In this embodiment, a specific structure of the sleeve lifting assembly 2 is provided. The sleeve lifting assembly 2 includes a ground support frame 21, a vertical support frame 22, and a top mounting frame 23. The ground support frame 21 is fixed to the ground, and the vertical support frame 22 is vertically mounted on the ground support frame 21. The top mounting frame 23 is located on top of the vertical support frame 22. A second electric winch 24 is installed inside the top mounting frame 23. A lifting rope 25 is wound on the shaft of the second electric winch 24. The connector of the lifting rope 25 is connected to the rotating platform 11, and when the lifting rope 25 is retracted, it drives the rotating end of the rotating platform 11 to rotate upward. A hinge bracket 26 is provided at the intersection of the ground support frame 21 and the vertical support frame 22. The rotating end of the rotating platform 11 is hinged to the hinge bracket 26. The rotating platform 11 rotates within the included angle range between the ground support frame 21 and the vertical support frame 22.

[0050] Example 2:

[0051] like Figure 6 As shown, this embodiment provides a calibration method for a multilayer tubing corrosion detection instrument. The instrument calibration is performed using a multilayer tubing corrosion detection morphology simulation device as described in Embodiment 1. The specific steps are as follows:

[0052] Step S1: Prepare a standard sample column and set several defect points of different types and sizes on the standard sample column;

[0053] Step S2: Assembly of standard sample tube and device: Fix the standard sample tube into the oil sleeve box 12, and put the tester 6 connected to the traction rope 31 into the standard sample tube. At the same time, connect the lifting rope 25 to the rotating platform 11.

[0054] Step S3: Adjust the tilt angle of the standard sample tube column, and start the second electric winch 24 to drive the rotating end of the rotating table 11 to rotate upward to the required angle for testing;

[0055] Step S4: Detect corrosion defects and collect data. Start the first electric winch 32 to drive the tester 6 to move to the defect point for defect detection, and transmit the detection data to the control and data acquisition system 4 for processing.

[0056] Step S5: Analyze and record the detection data.

[0057] Specifically, in step S1, several defect points are set at equal intervals on the standard sample tubing string, and the location and size information of each defect point are recorded to form defect standard data, which can provide a basis for subsequent data analysis. It should be noted that if it is necessary to measure and avoid factors other than well deviation, multiple different oil casing and tubing combinations should be designed according to the field oil casing and tubing combination requirements to simulate the calibration of the accuracy of the testing instrument 6 under various field conditions. Among them, defect points can include various types of defects such as longitudinal defects, transverse defects, spherical corrosion, ellipsoidal corrosion, perforation, scratches, grooves, and transverse cracks. The appropriate corrosion defect points are selected and set according to the specific situation.

[0058] In step S2, before assembly, the experimental equipment needs to be inspected to ensure that the casing assembly 1, casing lifting assembly 2, testing instrument traction device 3, and control and data acquisition system 4 are all in good working order. Then, the standard sample tube is installed into the casing box 12, and the standard sample tube is fixed in place using the stabilizer 14, ensuring that the standard sample tube is coaxial with the casing box 12. Next, the traction rope 31 is connected to the testing instrument 6, and the testing instrument 6 is lowered into the standard sample tube. The lifting rope 25 is connected to the rotating platform 11, and after completing the connection of other equipment, the calibration work can continue.

[0059] In step S5, the detected defect data is compared with the defect standard data in step 1. If the difference between the detected defect data and the defect standard data is not within the allowable error range, the calibration tester is inaccurate. If the difference is within the allowable error range, the calibration tester is accurate. Simultaneously, the control and data acquisition system 4 can monitor and record the corrosion situation in real time to ensure data accuracy. If data acquisition fails or problems are found during the detection process, the detection must be repeated immediately to ensure the reliability of the detection results.

[0060] To specifically detect corrosion under different tilt angles, in step S3, the standard sample column can be adjusted to different tilt angles. Then, steps S4 and S5 are completed to verify the accuracy of the tester under different tilt angles. Furthermore, after completing the verification of one tester, another tester can be replaced in step S2, and steps S3 to S5 are executed to verify the accuracy of the other tester.

[0061] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multilayer tubular column corrosion detection morphology simulation device, characterized in that, It includes a casing assembly (1), a casing lifting assembly (2), a testing instrument traction device (3), and a control and data acquisition system (4). The oil casing assembly (1) is used to install and fix the test string (5); The casing lifting assembly (2) is used to lift the oil casing assembly (1) and change the tilt angle of the test string (5); The test instrument traction device (3) is used to pull the test instrument (6) installed inside the test column (5); The control and data acquisition system (4) is used to control the start-up or shutdown of the casing lifting assembly (2) and the test instrument traction device (3), and the control and data acquisition system (4) is also used to collect the test data of the test instrument (6).

2. The multilayer tubular column corrosion detection morphology simulation device according to claim 1, characterized in that, The oil casing assembly (1) includes a rotating platform (11) and an oil casing box (12). The oil casing box (12) is installed and fixed on the rotating platform (11), and the test tube (5) is disposed inside the oil casing box (12). The sleeve lifting assembly (2) is connected to the rotating platform (11), and the sleeve lifting assembly (2) drives the rotating platform (11) to rotate in the vertical plane.

3. The multilayer tubular column corrosion detection morphology simulation device according to claim 2, characterized in that, One end of the rotating platform (11) is configured as a rotating end, and the other end of the rotating platform (11) is configured as a flipping end; The flipping end rotates upward in the vertical plane around the rotating end under the drive of the sleeve lifting assembly (2), and the flipping angle of the rotating end is in the range of 0 to 90°.

4. The multilayer tubular column corrosion detection morphology simulation device according to claim 3, characterized in that, The traction rope (31) of the traction device (3) of the tester enters the test column (5) from the flip end, and the traction rope (31) is connected to the tester (6) and drives the tester (6) to slide in the test column (5); The flip end is provided with a fixed pulley (13) for entering the line. One end of the traction rope (31) is wound around the shaft of the first electric winch (32). The other end of the traction rope (31) enters the test column (5) along the axis direction of the test column (5) after passing through the fixed pulley (13).

5. The multilayer tubular column corrosion detection morphology simulation device according to claim 2, characterized in that, The inner cavity of the oil casing box (12) is provided with several stabilizers (14). One side of the stabilizer (14) is fixed to the inner wall of the oil casing box (12), and the other side of the stabilizer (14) is abutted against the outer wall of the test string (5). The test string (5) coincides with the axis of the oil casing box (12).

6. The multilayer tubular column corrosion detection morphology simulation device according to claim 3, characterized in that, The casing lifting assembly (2) includes a ground support frame (21), a vertical support frame (22), and a top mounting frame (23). The ground support frame (21) is fixed to the ground, and the vertical support frame (22) is vertically mounted on the ground support frame (21). The top mounting frame (23) is located on the top of the vertical support frame (22). The top mounting bracket (23) is equipped with a second electric winch (24), and a lifting rope (25) is wound on the shaft of the second electric winch (24). The connector of the lifting rope (25) is connected to the rotating platform (11), and when the lifting rope (25) is retracted, it drives the rotating end of the rotating platform (11) to rotate upward.

7. The multilayer tubular column corrosion detection morphology simulation device according to claim 6, characterized in that, A hinge bracket (26) is provided at the intersection of the ground support frame (21) and the vertical support frame (22), and the rotating end of the rotating platform (11) is hinged to the hinge bracket (26); The rotating platform (11) rotates within the angle range between the ground support frame (21) and the vertical support frame (22).

8. A calibration method for a multilayer tubular corrosion detection instrument, comprising calibrating the instrument using a multilayer tubular corrosion detection morphology simulation device as described in any one of claims 1 to 7, characterized in that, The specific steps are as follows: Step S1: Prepare a standard sample column and set several defect points of different types and sizes on the standard sample column; Step S2: Assembly of standard sample tube and device: Fix the standard sample tube into the oil casing box (12), and put the tester (6) connected to the traction rope (31) into the standard sample tube, while connecting the lifting rope (25) to the rotating table (11). Step S3: Adjust the tilt angle of the standard sample tube column, start the second electric winch (24) to drive the rotating end of the rotating table (11) to rotate upward to the required angle for testing; Step S4: Detect corrosion defects and collect data. Start the first electric winch (32) to drive the tester (6) to move to the defect point for defect detection, and transmit the detection data to the control and data acquisition system (4) for processing. Step S5: Analyze and record the detection data.

9. The calibration method for a multi-layer tubular corrosion detection instrument according to claim 1, characterized in that, In step S1, several defect points are set at equal intervals on the standard sample tube column, and the position and size information of each defect point are recorded to form defect standard data. In step S5, the detected defect point data is compared with the defect standard data in step 1. If the difference between the detected defect point data and the defect standard data is not within the allowable error range, the test instrument verification is inaccurate. If the difference between the detected defect point data and the defect standard data is within the allowable error range, the test instrument verification is accurate.

10. The calibration method for a multi-layer tubular corrosion testing instrument according to claim 1, characterized in that, In step S3, the standard sample column can be adjusted to different tilt angles before completing steps S4 and S5, thereby verifying the accuracy of the tester under different tilt angles. After completing the calibration of one tester, another tester can be replaced in step S2, and steps S3 to S5 can be executed to complete the calibration of the accuracy of the other tester.

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