A novel fishing tool testing system

Abstract

This invention belongs to the field of downhole tool performance testing, specifically relating to a novel fishing tool testing system. It aims to address the lack of devices for testing and evaluating the performance of fishing tools. The invention includes a base, a force loading device, a support device, a clamping device, and a torque loading device. The force loading device and torque loading device are fixedly mounted on the base. The fishing string is mounted on the support device. The output end of the force loading device is fixedly connected to one end of the fishing string. The clamping device is fixed to the other end of the fishing string. The torque loading device is located on the side away from the force loading device. One end of the fishing tool is housed within the torque loading device. This system can simulate the downhole working conditions of the fishing tool, test and record the working performance indicators of the fishing tool during the test, such as rotational speed, torque, tension, and compression. It can achieve the testing and evaluation of fishing tools of different specifications, such as male fishing cones, female fishing cones, fishing spears, and fishing tubes.

Description

Technical Field

[0001] This invention belongs to the field of downhole tool performance testing, and specifically relates to a novel fishing tool testing system. Background Technology

[0002] Complex geological formations during drilling can lead to complex working conditions for downhole tubing and tools. Under these complex conditions, components such as drill pipe, drill collars, casing, tubing, and downhole tools may become stuck. In severe cases, the tubing and tools may break and fall into the well, causing significant problems for subsequent drilling operations.

[0003] These situations all require the use of salvage tools to remove obstacles and resume normal operations. The reliability of the salvage tools plays a crucial role in the success of the salvage operation; therefore, it is essential to test and evaluate the performance of the salvage tools before they are deployed into the well to ensure their quality and thus guarantee on-site construction safety. Summary of the Invention

[0004] To address the lack of devices for testing and evaluating the performance of salvage tools in existing technologies, this invention provides a novel salvage tool testing system, comprising a base, a force loading device, a support device, a clamping device, and a torque loading device.

[0005] The force loading device and torque loading device are fixedly mounted on the base, the retrieved pipe column is mounted on the support device, the output end of the force loading device is fixedly connected to one end of the retrieved pipe column, the clamping device is fixed to the other end of the retrieved pipe column, the torque loading device is mounted on the side away from the force loading device, and one end of the retrieval tool is mounted inside the torque loading device.

[0006] According to some embodiments of this application, a novel salvage tool testing system is provided, wherein the force loading device includes a loading cylinder and a loading cylinder fixing plate;

[0007] The loading cylinder fixing plate is fixedly connected to the base, and the loading cylinder is fixedly connected to the loading cylinder fixing plate by bolts. The loading cylinder fixing plate has a through hole, and the piston rod of the loading cylinder can pass through the through hole and be fixedly connected to the retrieved pipe column.

[0008] A novel salvage tool testing system according to some embodiments of this application further includes a displacement sensor and a force sensor. The displacement sensor is also installed at the end of the loading cylinder, and the force sensor is fixedly connected to the piston rod of the loading cylinder by a thread.

[0009] A novel salvage tool testing system according to some embodiments of this application further includes a T-shaped guide rail, which is laid on the base along the axial direction.

[0010] According to some embodiments of this application, a novel salvage tool testing system is provided, wherein the support device includes rollers, roller sliding frames, and roller adjusting plates;

[0011] The roller sliding frame is slidably mounted on the T-shaped guide rail. Two roller adjusting plates are provided, which are symmetrically and fixedly installed on the roller sliding frame. The roller adjusting plates are provided with multiple grooves of different depths. When the roller is placed into the grooves of different depths on the roller adjusting plates, it can support the retrieved pipe column of different diameters.

[0012] According to some embodiments of this application, a novel salvage tool testing system is provided, wherein the clamping device includes a sliding clamp seat, a clamping cylinder, a bearing sleeve, and a clamp head;

[0013] The sliding clamp seat is slidably mounted on the T-shaped guide rail. The clamping cylinders are symmetrically mounted on both sides of the sliding clamp seat. The sliding clamp seat has through holes corresponding to the clamping cylinders. The piston rod of the clamping cylinder can pass through the through holes. A bearing sleeve is also fitted over the piston rod of the clamping cylinder. The bearing sleeve can slide freely within the through holes. The end of the bearing sleeve is fixedly connected to the clamp head. The piston rod of the clamping cylinder is fixedly connected to the clamp head by threads. When the piston rod of the clamping cylinder extends or retracts, it can drive the bearing sleeve and the clamp head to extend or retract.

[0014] According to some embodiments of this application, a novel salvage tool testing system is provided, wherein the torque loading device includes a power motor mounting plate, a clamping ring, a reduction gear, a rotating head, a pressure nozzle, a sealing ring, a reduction gearbox, a power motor, a loading rod, and a bearing;

[0015] The power motor mounting plate is fixedly mounted on the base, and the power motor is fixedly connected to the power motor mounting plate. The power motor is driven by the reduction gear and the loading rod. A through hole is opened at the center of the power motor mounting plate, and the bearings are installed at both ends of the through hole. The loading rod is coaxially installed in the bearings and the through hole. A boss is provided at the end of the loading rod away from the power motor. The other end of the loading rod is fixedly connected to the clamping ring by threads. The rotating head is fixedly mounted on the reduction gearbox by threads. The rotating head can be embedded in the loading rod. A cylindrical platform is provided at the end of the rotating head embedded in the loading rod, and the sealing ring is provided on the cylindrical platform.

[0016] A novel salvage tool testing system according to some embodiments of this application further includes a torque and speed sensor, wherein one end of the loading rod is threadedly connected to the torque and speed sensor.

[0017] The beneficial effects of this invention are:

[0018] It can simulate the working conditions of fishing tools downhole, test and record the working performance indicators of fishing tools such as rotation speed, torque, tension and pressure during the test, so as to accurately obtain the working performance of fishing tools. It adopts a horizontal structure and is easy to operate. It can test and evaluate fishing tools of different specifications such as fishing male cone, fishing female cone, fishing spear and fishing tube. It can test the fishing tool's buckling ability, tensile strength, torsional strength, buckling ability and sealing performance. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of some embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the roller adjustment plate structure of some embodiments of this application;

[0022] Figure 3 These are schematic diagrams of support devices according to some embodiments of this application;

[0023] Figure 4 This is a schematic diagram of a clamping device according to some embodiments of this application.

[0024] In the diagram: 1. Displacement sensor; 2. Loading cylinder; 3. Base; 4. Loading cylinder fixing plate; 5. Force sensor; 6. Roller; 7. Roller sliding frame; 8. Roller adjusting plate; 9. Retrieved tube string; 10. Sliding clamp seat; 11. Clamping cylinder; 12. Bearing sleeve; 13. Clamp head; 14. T-shaped guide rail; 15. Power motor fixing plate; 16. Pressure ring; 17. Reduction gear; 18. Rotating head; 19. Pressure nozzle; 20. Sealing ring; 21. Gearbox; 22. Power motor; 23. Loading rod; 24. Bearing; 25. Torque and speed sensor; 26. Retrieval tool. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] like Figure 1-4 As shown, the present invention provides a novel salvage tool testing system, including a base 3, a force loading device, a support device, a clamping device, and a torque loading device;

[0028] The force loading device and the torque loading device are fixedly installed on the base 3. The retrieved pipe column 9 is installed on the support device. The output end of the force loading device is fixedly connected to one end of the retrieved pipe column 9. The clamping device is fixed to the other end of the retrieved pipe column 9. The torque loading device is installed on the side away from the force loading device. One end of the retrieval tool 26 is installed inside the torque loading device.

[0029] In practice, the base 3 serves as the foundation of the overall structure, the force loading device is used to drive the retrieved pipe column 9 to move along the axial direction, the clamping device clamps the retrieved pipe column 9, the support device provides support for the retrieved pipe column 9, and controls the placement height.

[0030] In some embodiments, the force loading device includes a loading cylinder 2 and a loading cylinder fixing plate 4;

[0031] The loading cylinder fixing plate 4 is fixedly connected to the base 3, and the loading cylinder 2 is fixedly connected to the loading cylinder fixing plate 4 by bolts. The loading cylinder fixing plate 4 has a through hole, and the piston rod of the loading cylinder 2 can pass through the through hole and be fixedly connected to the retrieved pipe column 9.

[0032] In some embodiments, the system further includes a displacement sensor 1 and a force sensor 5. The displacement sensor 1 is also installed at the end of the loading cylinder 2, and the force sensor 5 is fixedly connected to the piston rod of the loading cylinder 2 by a thread.

[0033] In practice, displacement sensor 1 can measure the distance the piston rod moves.

[0034] In some embodiments, a T-shaped guide rail 14 is also included, which is laid on the base 3 along the axial direction.

[0035] In some embodiments, the support device includes rollers 6, roller slide frame 7, and roller adjustment plate 8;

[0036] The roller sliding frame 7 is slidably mounted on the T-shaped guide rail 14. There are two roller adjusting plates 8, which are symmetrically and fixedly installed on the roller sliding frame 7. The roller adjusting plates 8 are provided with multiple grooves of different depths. When the roller 6 is placed into the grooves of different depths on the roller adjusting plates 8, it can support the retrieved pipe column 9 of different diameters.

[0037] In some embodiments, the clamping device includes a sliding jaw seat 10, a clamping cylinder 11, a bearing sleeve 12, and a jaw head 13;

[0038] The sliding clamp seat 10 is slidably mounted on the T-shaped guide rail 14. The clamping cylinders 11 are symmetrically mounted on both sides of the sliding clamp seat 10. The sliding clamp seat 10 has through holes, which are opened corresponding to the clamping cylinders 11. The piston rod of the clamping cylinder 11 can pass through the through holes. The piston rod of the clamping cylinder 11 is also fitted with a bearing sleeve 12. The bearing sleeve 12 can slide freely in the through holes. The end of the bearing sleeve 12 is fixedly connected to the clamp head 13. The piston rod of the clamping cylinder 11 is fixedly connected to the clamp head 13 by threads. When the piston rod of the clamping cylinder 11 extends or retracts, it can drive the bearing sleeve 12 and the clamp head 13 to extend or retract.

[0039] In practice, the bearing sleeve 12 is mainly used to bear the reverse torque of the retrieved tubing 9 on the clamp head 13 during the test, thereby protecting the cylinder piston rod from being broken.

[0040] In some embodiments, the torque loading device includes a power motor mounting plate 15, a clamping ring 16, a reduction gear 17, a rotating head 18, a pressure nozzle 19, a sealing ring 20, a reduction gearbox 21, a power motor 22, a loading rod 23, and a bearing 24.

[0041] The power motor mounting plate 15 is fixedly mounted on the base 3. The power motor 22 is fixedly connected to the power motor mounting plate 15. The power motor 22 is connected to the loading rod 23 through the reduction gear 17. A through hole is opened at the center of the power motor mounting plate 15. Bearings 24 are installed at both ends of the through hole. The loading rod 23 is coaxially installed in the bearings 24 and the through hole. A boss is provided at the end of the loading rod 23 away from the power motor 22. The other end of the loading rod 23 is fixedly connected to the clamping ring 16 by threads. The rotating head 18 is fixedly mounted on the reduction gearbox 21 by threads. The rotating head 18 can be embedded in the loading rod 23. A cylindrical platform is provided at the end of the rotating head 18 embedded in the loading rod 23. A sealing ring 20 is provided on the cylindrical platform.

[0042] In some embodiments, a torque and speed sensor 25 is also included, and one end of the loading rod 23 is threadedly connected to the torque and speed sensor 25.

[0043] In practice, the power motor 22 drives the loading rod 23 to rotate through the reduction gear 17. The loading rod 23 can be installed from left to right into the bearing 24 and the through hole. The left end of the loading rod 23 is provided with a boss, and the right end is connected to a clamping ring 16 by a thread. The boss and the clamping ring 16 make the loading rod 23 only able to rotate and not move left or right, thus bearing tensile and compressive loads.

[0044] During the retrieval test of the male / female cone: First, connect and secure the male / female cone to the loading rod 23. Based on the dimensions of the retrieved pipe string 9, place the roller 6 into the corresponding groove on the roller adjusting plate 8. Hoist the retrieved pipe string 9 onto the roller 6 and connect and secure it to the piston rod of the loading cylinder 2. Operate the loading cylinder 2 to move the retrieved pipe string 9 to a suitable position. Then, operate the clamping cylinder 11 to clamp the retrieved pipe string 9. Operate the loading cylinder 2 to bring the retrieved pipe string 9 into contact with the male / female cone. Start the power motor 22 to drive the loading rod 23 and the male / female cone to rotate at a specified speed. Simultaneously, operate the loading cylinder 2 to push the retrieved pipe string 9 to the right with a constant load. At this point, the male / female cone begins to create a connection on the retrieved pipe string 9. The displacement sensor 1 records the distance the retrieved pipe string 9 moves, i.e., the connection length; the force sensor 5 records the connection drilling pressure; and the torque-speed sensor 25 records the rotational speed and torque during connection creation. After the coupling is completed, a permissible tensile force test is conducted on the male / female cone retrieval mechanism. The loading cylinder 2 is operated to pull the retrieved tubing 9 to the left at a constant speed until the permissible tensile force is reached. After a specified load stabilization time, the load is unloaded. The male / female cone should be firmly held, and the body should not exhibit plastic deformation. The loading cylinder 2 is then operated to pull the retrieved tubing 9 to the left at a constant speed until the male / female cone breaks. This tests the ultimate strength of the male / female cone retrieval mechanism.

[0045] During the retrieval spear / tube test: First, connect and secure the retrieval spear / tube to the loading rod 23. Based on the dimensions of the retrieved tube string 9, place the roller into the corresponding groove on the roller adjusting plate 8. Hoist the retrieved tube string 9 onto the roller and connect and secure it to the piston rod of the loading cylinder 2. Operate the loading cylinder 2 to move the retrieved tube string 9 to a suitable position. Then, operate the clamping cylinder 11 to clamp the retrieved tube string 9. Operate the loading cylinder 2 to push the retrieved tube string 9 to the right at a constant speed, causing the retrieved tube string 9 to slowly enter the retrieval tube or the retrieval spear to slowly enter the retrieved tube string 9. Once the retrieved tube string 9 is fully inside the retrieval tube or the retrieval spear is fully inside the retrieved tube string 9, stop the loading cylinder 2. Start the power motor 22 to drive the loading rod 23 and the retrieval spear / tube to rotate counterclockwise 1-2 times. Operate the loading cylinder 2 to slowly pull the retrieved tube string 9 to the left. If the force sensor 5 reading increases, it indicates that the retrieval spear / tube has successfully retrieved the retrieved tube string 9. Next, the allowable tensile force test of the retrieval spear / tube can be performed. Operate the loading cylinder 2 to pull the retrieved tubing 9 to the left at a constant speed until the allowable tensile force is reached. After a specified load period, unload the load. The retrieval spear / tube should grip reliably without slippage. Continue operating the loading cylinder 2 to pull the retrieved tubing 9 to the left at a constant speed until the retrieval spear / tube breaks. This tests the ultimate strength of the retrieval spear / tube.

[0046] For retrieval spears / cylinders with a reverse clamping function, after the allowable tensile force test is completed, a reverse clamping torque test is performed. The loading cylinder 2 is operated to slowly pull the retrieved pipe string 9 to the left until the reverse clamping tensile force is reached and the load is maintained. The power motor 22 is started to apply torque to the loading rod 23 and the retrieval spear / cylinder to the allowable torque. After the load is stabilized for a specified time, the load is unloaded. The retrieval spear / cylinder should be reliably gripped and there should be no slippage.

[0047] For retrieval spears / cylinders with retraction function, after the allowable tensile force or allowable torque test is completed, operate the loading cylinder 2 to slowly push the retrieved pipe string 9 to the right until a certain displacement is generated, then stop the loading cylinder 2, start the power motor 22 to drive the loading rod 23 and the retrieval spear / cylinder to rotate clockwise 2-3 times, and then operate the loading cylinder 2 to slowly pull the retrieved pipe string 9 to the left to make the retrieval spear / cylinder retract from the retrieved pipe string 9. The retrieval spear / cylinder should retract flexibly without jamming.

[0048] For hydraulic retrieval spears / cylinders, after the allowable tensile force or torque test is completed, test liquid is pumped into the retrieval spear / cylinder through the pressure nozzle 19 to the rated pressure. Then, the loading cylinder 2 is operated to slowly pull the retrieved string 9 to the left, which will cause the retrieval spear / cylinder to exit the retrieved string 9.

[0049] In the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0052] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A novel fishing tool testing system, characterized in that, Includes a base (3), a force loading device, a support device, a clamping device, and a torque loading device; The force loading device and torque loading device are fixedly mounted on the base (3), the retrieved pipe column (9) is mounted on the support device, the output end of the force loading device is fixedly connected to one end of the retrieved pipe column (9), the clamping device is fixed to the other end of the retrieved pipe column (9), the torque loading device is mounted on the side away from the force loading device, and one end of the retrieval tool (26) is mounted inside the torque loading device.

2. A novel fishing tool testing system as claimed in claim 1, wherein, The force loading device includes a loading cylinder (2) and a loading cylinder fixing plate (4); The loading cylinder fixing plate (4) is fixedly connected to the base (3), and the loading cylinder (2) is fixedly connected to the loading cylinder fixing plate (4) by bolts. The loading cylinder fixing plate (4) has a through hole, and the piston rod of the loading cylinder (2) can pass through the through hole and be fixedly connected to the retrieved pipe column (9).

3. A novel fishing tool testing system as claimed in claim 2, wherein, It also includes a displacement sensor (1) and a force sensor (5). The end of the loading cylinder (2) is also equipped with a displacement sensor (1), and the force sensor (5) is fixedly connected to the piston rod of the loading cylinder (2) by a thread.

4. A novel fishing tool testing system as claimed in claim 1, wherein, It also includes a T-shaped guide rail (14), which is laid on the base (3) along the axial direction.

5. A novel fishing tool testing system as claimed in claim 4, wherein, The support device includes rollers (6), roller sliding frame (7), and roller adjusting plate (8); The roller sliding frame (7) is slidably mounted on the T-shaped guide rail (14). There are two roller adjusting plates (8). The two roller adjusting plates (8) are symmetrically and fixedly mounted on the roller sliding frame (7). The roller adjusting plate (8) has multiple grooves of different depths. When the roller (6) is placed into the grooves of different depths on the roller adjusting plate (8), it can support the retrieved pipe column (9) of different diameters.

6. A novel fishing tool testing system as claimed in claim 5, wherein, The clamping device includes a sliding jaw seat (10), a clamping cylinder (11), a bearing sleeve (12), and a jaw head (13); The sliding clamp seat (10) is slidably disposed on the T-shaped guide rail (14). The clamping cylinder (11) is symmetrically installed on both sides of the sliding clamp seat (10). The sliding clamp seat (10) has a through hole, which is opened corresponding to the clamping cylinder (11). The piston rod of the clamping cylinder (11) can pass through the through hole. The piston rod of the clamping cylinder (11) is also fitted with a bearing sleeve (12). The bearing sleeve (12) can slide freely in the through hole. The end of the bearing sleeve (12) is fixedly connected to the clamp head (13). The piston rod of the clamping cylinder (11) is fixedly connected to the clamp head (13) by threads. When the piston rod of the clamping cylinder (11) extends or retracts, it can drive the bearing sleeve (12) and the clamp head (13) to extend or retract.

7. A novel fishing tool testing system as claimed in claim 1, wherein, The torque loading device includes a power motor mounting plate (15), a clamping ring (16), a reduction gear (17), a rotating head (18), a pressure nozzle (19), a sealing ring (20), a reduction gearbox (21), a power motor (22), a loading rod (23), and a bearing (24); The power motor mounting plate (15) is fixedly mounted on the base (3). The power motor (22) is fixedly mounted on the power motor mounting plate (15). The power motor (22) is connected to the loading rod (23) through the reduction gear (17). A through hole is provided at the center of the power motor mounting plate (15). The bearings (24) are installed at both ends of the through hole. The loading rod (23) is coaxially mounted in the bearings (24) and the through hole. A boss is provided at one end of the loading rod (23) away from the power motor (22). The other end of the loading rod (23) is fixedly connected to the clamping ring (16) by threads. The rotating head (18) is fixedly mounted on the reduction gearbox (21) by threads. The rotating head (18) can be embedded in the loading rod (23). A cylindrical platform is provided at one end of the rotating head (18) embedded in the loading rod (23). The sealing ring (20) is provided on the cylindrical platform.

8. A novel fishing tool testing system as claimed in claim 7, wherein, It also includes a torque and speed sensor (25), one end of which is threadedly connected to the torque and speed sensor (25).

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