Multifunction downhole tool test system
By designing a multifunctional downhole tool testing system, the problems of difficult downhole tool installation and inaccurate test results were solved. It also realized high-pressure circulating fluid supply and drilling pressure simulation, thereby improving the functionality and accuracy of the testing equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SINOPEC OILFIELD SERVICE CORPORATION
- Filing Date
- 2024-12-31
- Publication Date
- 2026-06-30
AI Technical Summary
Existing oil drilling testing equipment differs significantly from the actual operating conditions of downhole products, leading to installation difficulties, high equipment costs, inaccurate test results, and an inability to effectively test product performance or simulate multi-condition tests.
A multifunctional downhole tool testing system is designed, comprising a high-pressure pump, an integrated test bench, a connection and operation module, and an automatic centering and straightening module. Through high-pressure circulating fluid and simulated drilling pressure, the system enables the tightening of downhole tools and multi-condition testing.
It realizes the simulation of high-pressure circulating fluid supply, tightening and drilling pressure of downhole tools. It has a compact structure, multiple functions, reduced costs, and can comprehensively simulate the working conditions of downhole tools, thus improving the accuracy and efficiency of the test.
Smart Images
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Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of oil drilling testing equipment, and in particular relates to a multifunctional downhole tool testing system. Background Technology
[0002] Currently, my country's high-end downhole products and instruments for oil drilling and production are still in the development stage. At present, the performance and technical level of high-end downhole equipment such as high-efficiency downhole speed-up tools, rotary screws, torque impactors, pressure-controlled drilling systems, high-efficiency drilling and milling equipment cannot meet the design requirements. In order to ensure the efficient operation of products and the application of advanced downhole operation processes, it is necessary to further improve the performance of products before they leave the factory.
[0003] At present, conventional testing differs significantly from the actual operating conditions of downhole products. In particular, various problems frequently arise during testing, such as the inability to tighten tools or insufficient tightening torque, the increased equipment cost and space occupation of separate tightening tools, bending and deformation of long tools of various pipe diameters, and the inability to clean water stains in the manifold after testing, which corrodes the pipes. In addition, the factory performance of individual test products cannot be effectively tested, verified, and evaluated, which seriously restricts product quality and R&D upgrades. Summary of the Invention
[0004] In view of this, this application proposes a multi-functional downhole tool testing system for at least one of the above-mentioned technical problems. The connection operation module of the multi-functional downhole tool testing system can not only provide high-pressure circulating fluid to the downhole tool under test on the integrated test bench, but also tighten the downhole tool under test and simulate drilling pressure. This makes the system structure of this application compact, multifunctional and low cost.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:
[0006] A multifunctional downhole tool testing system includes a high-pressure pump and a comprehensive testing platform. The high-pressure pump is connected to a water tank. The upper part of the comprehensive testing platform is equipped with test modules and connection operation modules spaced apart along its length. The test modules and the connection operation modules connect the downhole tool to be tested.
[0007] The connection operation module includes an outer cylinder, a flow mandrel, and a hydraulic cylinder. The outer cylinder is fixedly connected to the integrated test bench, and the flow mandrel is slidably connected inside the outer cylinder. One end of the flow mandrel facing the test module is used to connect with the downhole tool under test, and the other end of the flow mandrel facing away from the test module is fixedly connected to the piston rod of the hydraulic cylinder. The hydraulic cylinder is fixedly connected to the integrated test bench.
[0008] A portion of the outer circumferential surface of the flow mandrel and a portion of the inner circumferential surface of the outer cylinder form an annular flow cavity. The annular flow cavity is connected to both the liquid inlet on the side wall of the outer cylinder and the flow port on the side wall of the flow mandrel. The liquid inlet on the side wall of the outer cylinder is connected to the high-pressure pump via a high-pressure pipeline. A sliding sleeve is also provided between the flow mandrel and the outer cylinder. A locking key is detachably connected between the sliding sleeve and the outer cylinder. The flow mandrel is threadedly connected inside the sliding sleeve.
[0009] In some embodiments, the test module is a return water connector, which is slidably connected to the integrated test stand. One end of the return water connector is used to connect to the downhole tool under test, and the other end is connected to the water tank through a return water pipeline.
[0010] In some embodiments, a spiral groove is provided on a portion of the outer peripheral surface of the flow mandrel, and the spiral groove engages with multiple sets of pins installed on the inner peripheral surface of the sliding sleeve;
[0011] Two shoulders are spaced apart on the outer circumferential surface of the flow mandrel. The two shoulders, the inner circumferential surface of the outer cylinder, and the outer circumferential surface of the flow mandrel form the annular flow cavity. A sealing ring is installed on the outer circumferential surface of the shoulders to seal the annular flow cavity. The annular flow cavity is located closer to the oil cylinder than the sliding sleeve.
[0012] In some embodiments, an automatic centering and straightening module is slidably provided on the upper part of the integrated platform between the return water connector and the connection operation module to straighten and lift the tested downhole tool.
[0013] In some embodiments, the automatic centering and straightening module includes a mounting frame. The upper parts of both sides of the mounting frame are hinged to the middle of a straightening frame via fixed pins. A vertical support frame is slidably connected to the lower middle part of the mounting frame. A small hydraulic cylinder for driving the vertical support frame to rise and fall is fixedly connected to the bottom of the mounting frame. The lower sides of the vertical support frame have ramps that correspond one-to-one with the lower ends of the two straightening frames. Rollers are connected to the upper end of the straightening frame, the lower end of the straightening frame, and the upper end of the vertical support frame. The lower part of the mounting frame is hinged to the vertical support frame on both sides. A linkage frame is connected, and the linkage frame is provided with a first sliding groove that mates with a first pin on the vertical support frame. The linkage frame is also provided with a second sliding groove that mates with a second pin on the lower part of the straightening frame. When the small hydraulic cylinder drives the vertical support frame to move upward, the rollers at the upper ends of the two straightening frames and the rollers at the upper end of the vertical support frame synchronously approach and hold the downhole tool under test. When the small hydraulic cylinder drives the vertical support frame to move downward, the rollers at the upper ends of the two straightening frames and the rollers at the upper end of the vertical support frame synchronously move away and release the downhole tool under test.
[0014] In some embodiments, each of the testing module, the connection operation module, and the automatic centering and straightening module is slidably connected to the integrated test bench via a trolley, the frame of the trolley is connected to the integrated test bench via a pin, and each of the testing module, the connection operation module, and the automatic centering and straightening module is fixedly connected to the frame of the trolley.
[0015] In some embodiments, the integrated platform includes two support beams extending along its length, the two support beams being connected by a plurality of spaced-apart fixed seats, the fixed seats being fixedly connected to the ground;
[0016] The trolley includes a frame, with two T-shaped single-sided wheels connected to the upper and lower parts of each side of the frame. The upper and lower T-shaped single-sided wheels on one side of the frame are respectively fitted onto the upper and lower end faces of a support beam, and the upper and lower T-shaped single-sided wheels on the other side of the frame are respectively fitted onto the upper and lower end faces of another support beam.
[0017] In some embodiments, a hydraulic load module is also provided on the side of the integrated test bench. The hydraulic load module includes a hydraulic pump, a throttle valve, and an oil tank. The hydraulic pump, the throttle valve, and the oil tank are connected end to end by hydraulic pipelines. The hydraulic pump is driven by the tail of the test downhole tool via a motor.
[0018] In some embodiments, a purging module is connected to the high-pressure pipeline. The purging module includes an electric valve, a high-pressure gas cylinder, a gas drying device, and an air compressor. The inlet of the air compressor is connected to the gas drying device, and the outlet is connected to the inlet of the high-pressure gas cylinder. The outlet of the high-pressure gas cylinder is connected to the high-pressure pipeline through the electric valve.
[0019] In some embodiments, the high-pressure pump is connected to the water tank via a filling pump, a pressure sensor is installed on the high-pressure pipeline, a flow meter is installed on the return water pipeline, the oil cylinder is driven by a hydraulic station via an oil pipeline, and each of the throttle valve, the electric valve, the high-pressure pump, the filling pump, the pressure sensor, the flow meter, and the hydraulic station is connected to a monitoring console.
[0020] In the multifunctional downhole tool testing system provided by this invention, after the hydraulic cylinder is loaded via a hydraulic station, the sliding sleeve is locked to the outer cylinder by a locking key, and the flow mandrel is threadedly connected inside the sliding sleeve. This allows the linear motion of the cylinder to be converted into the rotation and linear motion of the flow mandrel and the piston rod of the cylinder. When the test module can only slide on the integrated test bench and cannot rotate, the rotational freedom of the downhole tool under test is constrained after its lower end is connected to the test module. The rotation and linear motion of the flow mandrel can then achieve the threaded tightening between the downhole tool under test and the flow mandrel. After the downhole tool under test is installed, the high-pressure pump delivers high-pressure fluid into the downhole tool under test through the high-pressure pipeline, the annular flow cavity between the outer cylinder and the flow mandrel, and the inner cavity of the flow mandrel. Furthermore, the drilling pressure can be applied by controlling the extension and retraction of the hydraulic cylinder. Therefore, the multifunctional downhole tool testing system provided by the present invention, due to the setting of the connection operation module, can not only provide high-pressure circulating fluid for the downhole tool under test on the integrated test bench, but also tighten the downhole tool under test, and simulate drilling pressure. That is, multiple functions can be realized through one module, making the system structure of the present invention compact, multifunctional and low cost. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of a multifunctional downhole tool testing system provided in a specific embodiment of the present invention;
[0023] Figure 2 This is a schematic diagram of the structure of the integrated stand provided in a specific embodiment of the present invention;
[0024] Figure 3 This is a schematic diagram of the connection operation module provided in a specific embodiment of the present invention;
[0025] Figure 4 This is a schematic diagram of the connection between the automatic centering and straightening module and the support beam according to a specific embodiment of the present invention.
[0026] Figure 5 This is a schematic diagram of the clamping state structure of the automatic centering and straightening module provided in a specific embodiment of the present invention.
[0027] Figure 6 This is a schematic diagram of the connection operation module and the support beam provided in a specific embodiment of the present invention.
[0028] Figure 7 for Figure 6 A schematic diagram of the AA cross-sectional structure;
[0029] Figure 8 This is a schematic diagram of the structure of a hydraulic load module provided in a specific embodiment of the present invention;
[0030] The following labels are shown in the attached diagram:
[0031] 1. High-pressure pump; 2. Injection pump; 3. Water tank; 4. Purge module; 41. Electric valve; 42. High-pressure gas cylinder; 43. Gas drying device; 44. Air compressor; 51. High-pressure pipeline; 511. High-pressure manifold; 512. Welding union; 513. Pressure sensor; 514. High-pressure hose; 52. Return water connector; 53. Return water pipeline; 531. Flow meter; 6. Integrated frame; 61. Support beam; 62. Fixing seat; 601. Connecting pin plate; 602. Left beam; 603. Right beam; 7. Automatic centering and straightening module; 71. Mounting frame; 72. Fixing pin; 73. Straightening frame; 731. Second pin; 74. Vertical support frame; 741. Sloping surface; 742. First pin; 75. Small hydraulic cylinder; 76. Linkage frame; 761. First chute; 762. Second chute; 77 8. Roller; 8. Connecting operation module; 81. Outer cylinder; 811. Liquid inlet; 82. Flow mandrel; 821. Flow port; 822. Spiral groove; 823. Shoulder; 824. Sealing ring; 83. Oil cylinder; 831. Piston rod; 832. Oil cylinder fixing plate; 833. Bolt; 84. Annular flow cavity; 85. Sliding sleeve; 851. Pin; 86. Locking key; 9. Hydraulic load control module; 91. Hydraulic pump; 92. Throttle valve; 93. Oil tank; 94. Hydraulic pipeline; 95. Pulley; 96. V-belt; 97. Air-cooled radiator; 10. Tested downhole tool; 11. Monitoring control console; 12. Hydraulic station; 121. Oil tubing; 13. Trolley; 131. Chassis; 1311. Fixing plate; 132. T-shaped single-sided wheel; 133. Pin shaft; 14. Torque sensor. Detailed Implementation
[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0033] Please refer to Figures 1 to 8 , Figure 1 This is a schematic diagram of the structure of a multifunctional downhole tool testing system provided in a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the integrated stand provided in a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the connection operation module provided in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the connection between the automatic centering and straightening module and the support beam according to a specific embodiment of the present invention. Figure 5 This is a schematic diagram of the clamping state structure of the automatic centering and straightening module provided in a specific embodiment of the present invention. Figure 6 This is a schematic diagram of the connection operation module and the support beam provided in a specific embodiment of the present invention. Figure 7 for Figure 6 A schematic diagram of the AA cross-sectional structure; Figure 8 This is a schematic diagram of the structure of a hydraulic load module provided in a specific embodiment of the present invention.
[0034] This invention provides a multifunctional downhole tool testing system including a high-pressure pump 1 and a comprehensive test stand 6. The high-pressure pump 1 is connected to a water tank 3. The comprehensive test stand 6 is used to place the downhole tool 10 to be tested. The upper part of the comprehensive test stand 6 is provided with test modules and connection operation modules 8 spaced apart along the length direction, and the test modules and connection operation modules 8 are connected to the downhole tool 10 to be tested.
[0035] The connection operation module 8 includes an outer cylinder 81, a flow mandrel 82, and a hydraulic cylinder 83. The outer cylinder 81 is fixedly connected to the integrated frame 6. The flow mandrel 82 is slidably connected inside the outer cylinder 81. The end of the flow mandrel 82 facing the test module (e.g., the return water connector 52) is used to connect (using a unibody connection) to the downhole tool 10 under test. The end of the flow mandrel 82 facing away from the test module is connected to the piston rod 831 of the hydraulic cylinder 83 by bolts 833. The flow mandrel 82 and the piston rod 831 of the hydraulic cylinder 83 can rotate and extend simultaneously. The hydraulic cylinder 83 is fixedly connected to the end of the integrated frame 6 via a hydraulic cylinder fixing plate 832. Figure 1 The hydraulic cylinder fixing plate 832 is welded to the far right side of the integrated frame 6.
[0036] A portion of the outer circumferential surface of the flow mandrel 82 and a portion of the inner circumferential surface of the outer cylinder 81 form an annular flow cavity 84. The annular flow cavity 84 is connected to the liquid inlet 811 on the side wall of the outer cylinder and the flow port 821 on the side wall of the flow mandrel 82. The liquid inlet 811 on the side wall of the outer cylinder 81 is connected to the high-pressure pump 1 through the high-pressure pipeline 51. A sliding sleeve 85 is also provided between the flow mandrel 82 and the outer cylinder. A locking key 86 is detachably connected between the sliding sleeve 85 and the outer cylinder 81. The flow mandrel 82 is threadedly connected inside the sliding sleeve 85.
[0037] When installing the downhole tool 10 under test, the lower end of the downhole tool 10 is mounted on the test module, and the upper end is connected to the flow mandrel 82 of the connecting operation module 8. After the hydraulic cylinder 83 is loaded by the hydraulic station 12, the sliding sleeve 85 is locked to the outer cylinder 81 by the locking key 86, and the flow mandrel 82 is threadedly connected inside the sliding sleeve 85. This allows the linear motion of the cylinder 83 to be converted into the rotation and linear motion of the flow mandrel 82 and the piston rod 831 of the cylinder 83. When the test module (such as the return water connector 52) can only slide on the integrated stand 6 and cannot rotate, the rotational freedom of the downhole tool 10 under test is constrained after the lower end is connected to the test module. The rotation and linear motion of the flow mandrel 82 can then achieve the thread tightening of the downhole tool 10 under test and the flow mandrel 82. When testing certain downhole tools 10 that do not require this thread tightening function, the locking key 40 can be removed.
[0038] After the test downhole tool 10 is installed, the high-pressure pump 1 can deliver high-pressure fluid into the test downhole tool 10 through the annular flow cavity 84 between the high-pressure pipeline 51, the outer cylinder 81 and the flow mandrel 82, and the inner cavity of the flow mandrel 82. In addition, the drilling pressure can be applied by controlling the extension and retraction of the hydraulic cylinder 83.
[0039] Therefore, the multifunctional downhole tool testing system provided in this embodiment of the invention, due to the inclusion of a connection operation module, can not only provide high-pressure circulating fluid for the downhole tool under test on the integrated test bench, but also tighten the downhole tool under test and simulate drilling pressure. In other words, multiple functions can be achieved through one module, making the system structure of the present invention compact, multifunctional and low-cost.
[0040] like Figure 2 As shown, in some embodiments, the test module is configured as a return water connector 52, which is slidably connected to the integrated test stand 6. One end of the return water connector 52 is used to connect to the downhole tool 10 under test, and the other end is connected to the water tank 3 through the return water pipeline 53. After the high-pressure pump 1 sends high-pressure fluid into the downhole tool 10 under test, the fluid inside the downhole tool 10 can also return to the water tank 3 through the return water connector 52 and the return water pipeline 53, completing the circulation test of the entire test fluid and solving the problem that the existing test system can only perform unidirectional tests and cannot simulate multi-condition tests.
[0041] like Figure 3 As shown, in some embodiments, preferably, a spiral groove 822 is provided on a portion of the outer circumferential surface of the flow mandrel 82, and the spiral groove 822 engages with multiple sets of pins 851 installed on the inner circumferential surface of the sliding sleeve 85. Compared with ordinary threaded connection structures, the engagement of the spiral groove 822 and the multiple sets of pins 851 has greater strength and a longer service life.
[0042] Specifically, two shoulders 823 are spaced apart on the outer circumferential surface of the flow mandrel 82. These shoulders 823, along with the inner circumferential surface of the outer cylinder 81 and the outer circumferential surface of the flow mandrel 82, form an annular flow cavity 84. A sealing ring 824 is installed on the outer circumferential surface of the shoulders 823 to seal the sliding and rotational movement between the flow mandrel 82 and the outer cylinder 81, thereby sealing the annular flow cavity 84. This annular flow cavity 84 is positioned closer to the hydraulic cylinder 83 than the sliding sleeve 85. Positioning the sliding sleeve 85 at the end furthest from the piston rod 831 of the hydraulic cylinder 83 improves the guiding effect of the sliding sleeve 85 on the flow mandrel 82.
[0043] When testing longer tools, there is a problem of bending and deformation in the middle. Therefore, in some embodiments, an automatic centering and straightening module 7 is also slidably provided on the upper part of the integrated stand 6 between the return water connector 52 and the connection operation module 8 to straighten and lift the downhole tool 10 under test.
[0044] like Figure 4 and Figure 5 As shown, based on the above embodiment, preferably, the automatic centering and straightening module 7 includes a mounting frame 71. The upper parts of both sides of the mounting frame 71 are hinged to the middle of a straightening frame 73 via a fixing pin 72, and the two straightening frames 73 are symmetrically arranged. A vertical support frame 74 is slidably connected to the lower middle part of the mounting frame 71, and a small hydraulic cylinder 75 is fixedly connected to the bottom of the mounting frame 71 to drive the vertical support frame 74 to rise and fall. The lower part of the vertical support frame 74 has inclined surfaces 741 on both sides that correspond to the lower ends of the two straightening frames 73. The upper end of the straightening frame 73, the lower end of the straightening frame 73, and the upper end of the vertical support frame 74 are all connected to rollers 77. The lower part of the mounting frame 71 is hinged to a linkage frame 76 on each side of the vertical support frame 74. The linkage frame 76 has a first sliding groove 761 that mates with the first pin 742 on the vertical support frame 74. The linkage frame 76 also has a second sliding groove 762 that mates with the second pin 731 on the lower part of the straightening frame 73.
[0045] When the small hydraulic cylinder 75 drives the vertical support frame 74 to move upward, the rollers 77 at the upper ends of the two straightening frames 73 and the rollers 77 at the upper ends of the vertical support frame 74 simultaneously approach and hold the downhole tool 10 under test. When the small hydraulic cylinder 75 drives the vertical support frame 74 to move downward, the rollers 77 at the upper ends of the two straightening frames 73 and the rollers 77 at the upper ends of the vertical support frame 74 simultaneously move away and release the downhole tool 10 under test. The specific principle is as follows: When the test downhole tool 10 is installed, the piston rod of the small hydraulic cylinder 75 moves upward, driving the vertical support frame 74 to move upward. At the same time, the triangular ramp surface 741 structure at the lower part of the vertical support frame 74 pushes the roller 77 at the lower end of the straightening frame 73. The roller 77 at the upper end of the straightening frame 73 moves towards the center with the fixed pin 72 as the pivot point. The three rollers 77, including the upper rollers 77 of the two straightening frames 73 and the upper rollers 77 of the vertical support frame 74, simultaneously hold the test downhole tool 10, thereby achieving the effect of automatic centering and straightening. At the same time, the first pin 742 on the vertical support frame 74 slides in the first slide groove 761 on the linkage frame 76, and the second pin 731 on the straightening frame 73 slides in the second slide groove 762. When the small hydraulic cylinder 75 drives the vertical support frame 74 to move downward, the first pin 742 on the vertical support frame 74 slides in the opposite direction in the first slide groove 761 on the linkage frame 76, which drives the linkage frame 76 to rotate. At the same time, the second pin 731 on the straightening frame 73 slides in the opposite direction in the second slide groove 762. The rotation of the linkage frame 76 drives the straightening frame 73 to rotate, thereby causing the upper ends of the two straightening frames 73 to move away from each other. This allows the rollers 77 at the upper ends of the two straightening frames 73 and the rollers 77 at the upper end of the vertical support frame 74 to move away synchronously and release the downhole tool 10 being tested.
[0046] Because the downhole testing tool 10 is directly held by the rollers 77, the automatic centering and straightening module 7 can not only straighten and lift the downhole testing tool 10, but also does not affect its rotation. Furthermore, the small hydraulic cylinder 75 uses hydraulic locking, and this structure can achieve a large clamping range, such as... Figure 4 For larger diameter specimens, the working condition is to be maintained, such as Figure 5 For smaller diameter specimens, the clamping pressure is highly stable and accurate when the clamping pressure changes, and the specimens are easy to install. In addition, when the three rollers 77 simultaneously hold the tested downhole tool 10, the slope surface 741 at the bottom of the vertical support frame 74 supports the rollers 77 at the bottom of the straightening frame 73, which can transmit the clamping force more stably.
[0047] Based on the above embodiments, each of the testing module, the connection operation module 8, and the automatic centering and straightening module 7 is slidably connected to the integrated test bench via a trolley 13. The frame 131 of the trolley 13 is connected to the integrated test bench 6 via a pin, and each of the testing module, the connection operation module 8, and the automatic centering and straightening module 7 is fixedly connected to the frame 131 of the trolley 13. The specific implementation method is as follows: Figure 1As shown, the test module (return water connector 52) is slidably connected to the integrated test bench 6 via the trolley 13, and the return water connector 52 is fixedly connected to the frame 131 of the trolley 13. Figure 6 As shown, the outer cylinder 81 in the connection operation module 8 is detachably and fixedly connected to the integrated frame 6 via the trolley 13. The fixing plate 1311 on the frame 131 of the trolley 13 is connected to the integrated frame 6 via a pin 133, and the outer cylinder 81 is fixedly connected to the frame 131 of the trolley 13. Figure 4 As shown, the mounting bracket 71 in the automatic centering and straightening module 7 is slidably connected to the integrated platform 6 via the trolley 13, and the mounting bracket 71 is fixedly connected to the frame 131 of the trolley 13.
[0048] like Figure 2 As shown, specifically, the integrated platform 6 includes two support beams 61 extending along its length. The two support beams 61 are connected by a plurality of spaced-apart fixing seats 62. The fixing seats 62 are fixedly connected to the ground by chemical expansion bolts to ensure the overall fixation and stability of the integrated platform 6. The support beams 61 can be configured as a segmented structure, for example, a two-section structure including a left beam 602 and a right beam 603 connected by a connecting pin plate 601 and a pin shaft. The connection by the connecting pin plate 601 and the pin shaft ensures integrity and straightness.
[0049] like Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, the trolley includes a frame 131. Two T-shaped single-sided wheels 132 are connected to the upper and lower parts of each side of the frame 131. The upper and lower T-shaped single-sided wheels 132 on one side of the frame 131 respectively mate with the upper and lower end faces of a support beam 61, and the upper and lower T-shaped single-sided wheels 132 on the other side of the frame 131 respectively mate with the upper and lower end faces of another support beam 61. This ensures a reliable connection between the trolley and the integrated platform 6.
[0050] like Figure 1 and Figure 8 As shown, the side of the integrated test bench 6 is also equipped with a hydraulic load module 9, which is used for torque load application during the testing of the motor-type downhole tool 10. When the motor-type downhole tool 10 is tightened with the flow mandrel 82, when the high-pressure pump 1 is working, fluid enters the high-pressure pump 1 from the water tank 3 through the injection pump 2, is pressurized, and then enters the high-pressure manifold 511. It then enters the motor-type downhole tool 10 installed on the integrated test bench 6 through the high-pressure hose 514, and the downhole tool 10 under test rotates under the action of the high-pressure fluid. The lower end of the motor-type downhole tool 10 is not connected to the return water connector 52, but is connected to the hydraulic load module 9 through the transmission component, and the high-pressure fluid of the motor-type downhole tool 10 flows freely out from its tail.
[0051] The hydraulic load module 9 includes a hydraulic pump 91, a throttle valve 92, and an oil tank 93. The hydraulic pump 91, throttle valve 92, and oil tank 93 are connected end-to-end via hydraulic lines 94. In other words, the inlet of the hydraulic pump 91 is connected to the oil tank 93, the outlet of the hydraulic pump 91 is connected to the inlet of the throttle valve 92, and the outlet of the throttle valve 92 is connected to the oil tank 93. The hydraulic pump 91 is driven by the tail of the test downhole tool 10 (such as a screw motor) via a motor. For example, during screw motor testing, it is connected to the hydraulic load control module 9 via belt drive. A pulley 95 with a torque sensor 14 is installed at the tail of the screw motor, and the hydraulic pump 91 is driven to rotate via a V-belt 96. The torque sensor 14 detects the real-time torque load, thereby achieving load loading and testing. Adjusting the opening of the throttle valve 92 controls the load. The smaller the throttle valve 92 is closed, the greater the rotational load on the hydraulic pump 91. Therefore, the hydraulic load control module 9 can conveniently provide output load characteristic testing for the screw motor. In addition, an air-cooled radiator 97 is installed on the fuel tank 93 to achieve heat dissipation of the fuel tank 93.
[0052] like Figure 1 As shown, in some embodiments, a purging module 4 is connected to the high-pressure pipeline 51. The purging module 4 includes an electric valve 41, a high-pressure gas cylinder 42, a gas drying device 43, and an air compressor 44. The inlet of the air compressor 44 is connected to the gas drying device 43, and the outlet of the air compressor 44 is connected to the inlet of the high-pressure gas cylinder 42. The outlet of the high-pressure gas cylinder 42 is connected to the high-pressure pipeline 51 via the electric valve 41. After the test of the downhole tool 10 is completed, the air compressor is started. The air compressor compresses the gas dried by the gas drying device 43 and stores it in the high-pressure gas cylinder 42. After reaching a certain pressure, the electric valve 41 is opened to purge and dry the inside of the high-pressure pipeline 51, ensuring that the water stains inside the high-pressure pipeline 51 are dried, ensuring that there are no water stains remaining in the test system, and improving the life of the test system.
[0053] like Figure 1As shown, the high-pressure pump 1 is connected to the water tank 3 via the injection pump 2, which facilitates the water supply to the high-pressure pump 1 and provides a stable inlet pressure. A pressure sensor 513 is installed on the high-pressure pipeline 51. Specifically, the high-pressure pipeline 51 includes a high-pressure manifold 511 and a high-pressure hose 514. The drain end of the high-pressure pump 1 is connected to the high-pressure manifold 511. Multiple sections of the high-pressure manifold 511 are connected by welded unions 512. The high-pressure manifold 511 is connected to the inlet 811 of the outer cylinder 81 of the connecting operation module via the high-pressure hose 514. The pressure sensor 513 is installed on the high-pressure manifold 511 for measuring the pressure of the high-pressure fluid. A flow meter 531 is installed on the return water pipeline 53 for testing the flow rate of the entire system. The hydraulic cylinder 83 is driven by the hydraulic station 12 via the oil pipe 121. Each of the following components—throttle valve 92, electric valve 41, high-pressure pump 1, injection pump 2, pressure sensor 513, flow meter 531, and hydraulic station 12—is connected to the monitoring control console 11. Because of the monitoring console 11, simulation tests of downhole tools can be carried out remotely, and multiple test parameters such as circulating fluid pressure and flow rate, drilling pressure and torque can be remotely monitored at any time.
[0054] In summary, the multifunctional downhole testing system in this embodiment of the invention, equipped with a high-pressure pump 1, a purging module 4, a return water connector 52, a pressure sensor 513, a flow meter 531, an automatic centering and straightening module 7, a connection operation module 8, a hydraulic load control module 9, and a torque sensor 14, can realize a variety of testing functions, including: (1) fluid circulation pressure testing; (2) fluid circulation flow testing; (3) rotational load loading and torque and speed testing of screw motor-type downhole tools under test; (4) joint pre-tightening during tool installation; (5) pipeline purging after testing; (6) automatic centering and straightening of long tools; and (7) tensile and compressive load testing of tools. Therefore, the multifunctional downhole testing system in this embodiment of the invention uses the connection operation module to tighten and implement drilling pressure on the downhole tools under test, uses the automatic centering and straightening module to straighten the downhole tools under test, and uses the hydraulic load module to test the torque characteristics of motor-type downhole tools under test. It is simple to operate, has gentle power, good stability, and high accuracy. Compared to traditional testing systems, it is more convenient and comprehensive, solves many testing problems, can simulate the working conditions of various downhole tools to the greatest extent, better reflects the actual performance of products, and provides accurate basis for product upgrades.
[0055] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0056] The automatic roller mechanism for the drilling tool provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention. Therefore, this invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A multi-functional downhole tool testing system, characterized by, include: A high-pressure pump (1) is connected to a water tank (3); as well as A comprehensive test bench (6) is provided with test modules and connection operation modules (8) spaced apart along the length of the upper part of the comprehensive test bench (6). The test modules and the connection operation modules (8) are connected to the downhole tool (10) to be tested. The connection operation module (8) includes an outer cylinder (81), a flow mandrel (82), and a hydraulic cylinder (83). The outer cylinder (81) is fixedly connected to the integrated frame (6). The flow mandrel (82) is slidably connected inside the outer cylinder (81). One end of the flow mandrel (82) facing the test module is used to connect with the downhole tool (10) under test. The other end of the flow mandrel (82) facing away from the test module is fixedly connected to the piston rod (831) of the hydraulic cylinder (83). The hydraulic cylinder (83) is fixedly connected to the integrated frame (6). A portion of the outer peripheral surface of the flow mandrel (82) and a portion of the inner peripheral surface of the outer cylinder (81) form an annular flow cavity (84). The annular flow cavity (84) is connected to the liquid inlet (811) on the side wall of the outer cylinder (81) and the flow port (821) on the side wall of the flow mandrel (82). The liquid inlet (811) on the side wall of the outer cylinder (81) is connected to the high-pressure pump (1) through a high-pressure pipeline (51). A sliding sleeve (85) is also provided between the flow mandrel (82) and the outer cylinder (81). A locking key (86) is detachably connected between the sliding sleeve (85) and the outer cylinder (81). The flow mandrel (82) is threadedly connected inside the sliding sleeve (85).
2. The multi-functional downhole tool test system of claim 1, wherein, The test module is a return water connector (52), which is slidably connected to the integrated frame (6). One end of the return water connector (52) is used to connect to the downhole tool (10) under test, and the other end is connected to the water tank (3) through the return water pipeline (53).
3. The multi-functional downhole tool test system of claim 1, wherein, A spiral groove (822) is provided on a portion of the outer circumferential surface of the flow mandrel (82), and the spiral groove (822) cooperates with multiple sets of pins (851) installed on the inner circumferential surface of the sliding sleeve (85); Two shoulders (823) are spaced apart on the outer circumferential surface of the flow mandrel (82). The two shoulders (823) form the annular flow cavity (84) between the inner circumferential surface of the outer cylinder (81) and the outer circumferential surface of the flow mandrel (82). A sealing ring (824) is installed on the outer circumferential surface of the shoulders (823) to seal the annular flow cavity (84). The annular flow cavity (84) is located closer to the oil cylinder (83) than the sliding sleeve (85).
4. The multi-functional downhole tool test system of claim 2, wherein, An automatic centering and straightening module (7) is also slidably provided on the upper part of the integrated platform (6) between the return water connector (52) and the connection operation module (8) to straighten and lift the tested downhole tool (10).
5. The multi-functional downhole tool test system of claim 4, wherein, The automatic centering and straightening module (7) includes a mounting frame (71). The upper parts of both sides of the mounting frame (71) are hinged to the middle of a straightening frame (73) via fixed pins (72). A vertical support frame (74) is slidably connected to the lower middle part of the mounting frame (71). A small hydraulic cylinder (75) for driving the vertical support frame (74) to rise and fall is fixedly connected to the bottom of the mounting frame (71). The lower sides of the vertical support frame (74) are provided with inclined surfaces (741) corresponding to the lower ends of the two straightening frames (73). Rollers (77) are connected to the upper end of the straightening frame (73), the lower end of the straightening frame (73), and the upper end of the vertical support frame (74). A linkage frame (76) is hinged to each side of the vertical support frame (74) at the lower part of the mounting frame (71). The linkage frame (76) is provided with a first sliding groove (761) that cooperates with the first pin (742) on the vertical support frame (74). The linkage frame (76) is also provided with a second sliding groove (762) that cooperates with the second pin (731) on the lower part of the straightening frame (73). When the small oil cylinder (75) drives the vertical support frame (74) to move upward, the rollers (77) at the upper ends of the two straightening frames (73) and the rollers (77) at the upper ends of the vertical support frame (74) simultaneously approach and hold the downhole tool (10) under test. When the small oil cylinder (75) drives the vertical support frame (74) to move downward, the rollers (77) at the upper ends of the two straightening frames (73) and the rollers (77) at the upper ends of the vertical support frame (74) simultaneously move away and release the downhole tool (10) under test.
6. The multi-functional downhole tool test system of claim 4, wherein, Each of the test module, the connection operation module (8), and the automatic centering and straightening module (7) is slidably connected to the integrated test stand (6) via a trolley (13). The frame (131) of the trolley (13) can be connected to the integrated test stand (6) via a pin. Each of the test module, the connection operation module (8), and the automatic centering and straightening module (7) is fixedly connected to the frame (131) of the trolley (13).
7. The multi-functional downhole tool test system of claim 6, wherein, The integrated platform (6) includes two support beams (61) extending along the length direction. The two support beams (61) are connected by a plurality of spaced-apart fixed seats (62). The fixed seats (62) are fixedly connected to the ground. The trolley (13) includes a frame (131), with two T-shaped single-sided wheels (132) connected to the upper and lower parts of each side of the frame (131). The upper and lower T-shaped single-sided wheels (132) on one side of the frame (131) are respectively fitted to the upper and lower end faces of one of the support beams (61), and the upper and lower T-shaped single-sided wheels (132) on the other side of the frame (131) are respectively fitted to the upper and lower end faces of another support beam (61).
8. The multi-functional downhole tool test system of any of claims 1-7, wherein, The side of the integrated test bench (6) is also provided with a hydraulic load module (9). The hydraulic load module (9) includes a hydraulic pump (91), a throttle valve (92) and an oil tank (93). The hydraulic pump (91), the throttle valve (92) and the oil tank (93) are connected end to end through a hydraulic pipeline (94). The hydraulic pump (91) is driven by the tail of the test downhole tool (10) through a motor.
9. The multi-functional downhole tool test system of claim 8, wherein, A purging module (4) is connected to the high-pressure pipeline (51). The purging module (4) includes an electric valve (41), a high-pressure gas cylinder (42), a gas drying device (43), and an air compressor (44). The inlet of the air compressor (44) is connected to the gas drying device (43), and the outlet is connected to the inlet of the high-pressure gas cylinder (42). The outlet of the high-pressure gas cylinder (42) is connected to the high-pressure pipeline (51) through the electric valve (41).
10. The multi-functional downhole tool test system of claim 9, wherein, The high-pressure pump (1) is connected to the water tank (3) via the injection pump (2). A pressure sensor (513) is installed on the high-pressure pipeline. A flow meter (531) is installed on the return water pipeline (53). The oil cylinder (83) is driven by the hydraulic station (12) via the oil pipeline (121). Each of the throttle valve (92), the electric valve (41), the high-pressure pump (1), the injection pump (2), the pressure sensor (513), the flow meter (531), and the hydraulic station (12) is connected to the monitoring control console (11).