Performance testing device for screwed joint

Abstract

The utility model discloses a screwed joint performance testing device, which relates to the technical field of screwed joints and comprises a screwed joint female fastener and a screwed joint male fastener. A threaded connector female fastener and a threaded connector male fastener are arranged above the bottom plate, the threaded connector female fastener is in threaded connection with the threaded connector male fastener, the lower end of the threaded connector female fastener and the lower end of the threaded connector male fastener are fixedly connected with supporting bases, the supporting bases are fixedly connected with the upper end of the bottom plate, and rectangular grooves are formed in the front end and the rear end of the bottom plate. When the sealing performance of the screwed joint is detected, the pump body provides a pressure value specified by measurement for the nozzle, when the pressure value reaches the specified pressure value, the pump is stopped and kept for a period of time, whether liquid leakage occurs or not is observed, the operation is convenient, the sealing performance of the screwed joint can be effectively judged, reference is provided for on-site construction, and the working efficiency is improved. And the safety and reliability of subsequent construction are guaranteed, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of threaded joints, in particular to a threaded joint performance testing device. Background Art

[0002] Oil and casing are connected by threads to form a pipe string that is thousands of meters long. The threaded joints and the oil casing string are subjected to the test of complex well conditions in oil and gas wells. The quality of the threaded joints directly affects the success or failure of drilling and production operations and the life of oil and gas wells. According to surveys, up to 86% of domestic oil casing failure accidents occur at threaded connections. Entering the new century, with the continuous development of oil and gas well mining technology and the increasing complexity of downhole conditions, traditional API threaded joints cannot meet the use requirements of oilfield customers due to their own structural defects. Special threaded joints can well make up for the design defects of API threaded joints by designing a unique mechanical structure. Field applications have proved that the use of special threaded joints is one of the effective measures for oilfield customers to solve the premature failure of oil casing. To this end, various manufacturers have carried out a lot of research on special threaded joints and developed patented products for special threaded joints. As the main evaluation index of joints, the sealing performance of special threaded joints has attracted the attention of more and more scientific researchers. Domestic and foreign R&D personnel have spent a lot of manpower and material resources to develop different special thread sealing combinations.

[0003] At present, in order to improve drilling efficiency, drilling speed-up tools are usually used during the drilling process. However, the existing drilling speed-up tools have complex structures and many parts. In order to place other parts inside the drilling speed-up tools, the internal space of the shell is required to be large. At this time, standard drill pipe buckles are often not applicable. Therefore, it is necessary to design matching special drill pipe buckles to meet the drill pipe connection requirements. The sealing and pressure resistance of special drill pipe buckles will directly affect the reliability and safety of the use of drill pipe buckles. For this reason, we propose a threaded joint performance test device. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a threaded joint performance testing device, which can not only accurately and conveniently detect the sealing performance of the threaded joint, but also simulate the stress and strain under different contact pressures, and then detect the compressive performance of the threaded joint under different pressures. The utility model has a simple structure and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a threaded joint performance test device, comprising a base plate, a detection mechanism, a threaded joint female fastener and a threaded joint male fastener;

[0006] A threaded joint female fastener and a threaded joint male fastener are provided above the bottom plate, the threaded joint female fastener is threadedly connected to the threaded joint male fastener, the lower ends of the threaded joint female fastener and the threaded joint male fastener are fixedly connected to a support seat, the support seat is fixedly connected to the upper end of the bottom plate, and fixing mechanisms are provided on the left and right sides of the support seat, and a detection mechanism is provided at both the front and rear ends of the bottom plate, and rectangular grooves are provided at both the front and rear ends of the bottom plate, and adjustment mechanisms are provided in the rectangular grooves, and brackets are evenly installed on the middle upper end of the bottom plate, and the upper ends of the brackets are fixedly connected to the lower end of the top plate, and a detection mechanism is provided on the top plate;

[0007] The detection mechanism 1 includes a detection box, a pump body and a sealing end. The pump body is fixedly installed inside the detection box, and the sealing end is fixedly installed on the inner side of the detection box. The liquid outlet of the pump body is connected to the delivery pipe, the delivery pipe is connected to the nozzle, and the input end of the pump body is electrically connected to the output end of the external controller.

[0008] When testing the sealing of threaded joints, the pump body provides the nozzle with a specified pressure value for measurement. When the specified pressure value is reached, the pump is stopped and maintained for a period of time (such as 10-30 minutes) to observe whether there is any leakage of the testing liquid. It is easy to operate and can effectively judge the sealing of threaded joints, providing a reference for on-site construction, ensuring the safety and reliability of subsequent construction, and has a simple structure and low cost.

[0009] Furthermore, the detection mechanism 1 also includes a sealing joint 1 and a sealing joint 2, one sealing end is fixedly connected to the sealing joint 1, and the other sealing end is fixedly connected to the sealing joint 2, the sealing joint 1 is threadedly connected to the female fastener of the threaded joint, and the sealing joint 2 is threadedly connected to the male fastener of the threaded joint.

[0010] The threaded joint female fastener and the threaded joint male fastener are respectively threadedly connected to the sealing joint 1 and the sealing joint 2, which makes it easy to disassemble and replace the sealing joint 1 and the sealing joint 2, and realizes rapid installation when performing different performance tests.

[0011] Furthermore, the fixing mechanism includes a fixing plate, a fixing block and a hydraulic push rod. The fixing block is fixedly installed on the upper end of the base plate, and the hydraulic push rod is fixedly installed on the fixing block. The output end of the hydraulic push rod is fixedly connected to the fixing plate, and a telescopic rod is symmetrically installed between the fixing plate and the fixing block. The hydraulic pump input end of the hydraulic push rod is electrically connected to the output end of the external controller.

[0012] Start the hydraulic push rod, and the hydraulic push rod starts to move with the fixed plate. During the movement of the fixed plate, the telescopic rod can maintain the stability of movement. The fixed plate starts to fix the female fastener and the male fastener of the threaded joint to prevent the female fastener and the male fastener of the threaded joint from moving during the test, thereby affecting the test results.

[0013] Furthermore, the adjustment mechanism includes a driving motor, a lead screw and a storage plate. The lead screw is rotatably connected in the rectangular groove, and a sliding block is threadedly connected to the lead screw. The outer ends of the base plates are fixedly installed with driving motors, and the output shaft of the driving motor passes through the base plate and is fixedly connected to the lead screw. The upper ends of the sliding blocks are fixedly installed with storage plates, and detection boxes are fixedly installed on the storage plates. The input end of the driving motor is electrically connected to the output end of the external controller.

[0014] When the sealing performance of the threaded joint needs to be tested, the drive motor is started, and the drive motor then drives the lead screw to start rotating. During the rotation, the sliding block is driven to move, and then the storage plate and the inspection box are moved, which can help the tester to perform threaded connection between the sealing joint and the threaded joint female fastener and the threaded joint male fastener.

[0015] Furthermore, the rectangular groove is symmetrically provided with adjusting rods, the sliding block is symmetrically provided with sliding holes, and the adjusting rods are slidably connected to the sliding holes on the sliding block.

[0016] The adjustment rod can control or guide the sliding of the sliding block to reduce the friction force on the sliding block during the movement.

[0017] Furthermore, the second detection mechanism includes a hydraulic cylinder, a pressure plate and two telescopic rods. The hydraulic cylinder is fixedly installed on the upper end of the top plate, and a pressure plate is provided under the top plate. The output end of the hydraulic cylinder is fixedly connected to the pressure plate, and two telescopic rods are evenly connected between the lower ends of the pressure plate and the top plate. Pressure sensors are fixedly installed on the support seats, the input end of the hydraulic pump of the hydraulic cylinder is electrically connected to the output end of the external controller, and the output end of the pressure sensor is electrically connected to the input end of the external controller.

[0018] When it is necessary to test the pressure resistance of the threaded joint, the external controller starts the hydraulic cylinder, which then moves the pressure plate downward. During the movement, the telescopic rod 2 can maintain the stability of movement, and the pressure plate contacts the surface of the threaded joint. As the pressure output by the hydraulic cylinder gradually increases, the pressure resistance of the threaded joint under different pressures can be tested. The pressure sensor will detect the pressure and transmit it to the outside world, and the deformation degree of the threaded joint under different pressures can be obtained.

[0019] Compared with the prior art, the beneficial effects of the utility model are: the threaded joint performance test device has the following advantages:

[0020] 1. When testing the sealing of threaded joints, the pump body provides the nozzle with a specified pressure value for measurement. When the specified pressure value is reached, the pump is stopped and maintained for a period of time (such as 10-30 minutes) to observe whether there is leakage of the detection liquid. It is easy to operate and can effectively judge the sealing of threaded joints, providing a reference for on-site construction, ensuring the safety and reliability of subsequent construction, and has a simple structure and low cost.

[0021] 2. The threaded joint female fastener and the threaded joint male fastener are respectively threadedly connected to the sealing joint 1 and the sealing joint 2, which makes it easy to disassemble and replace the sealing joint 1 and the sealing joint 2, and realizes rapid installation when performing different performance tests.

[0022] 3. When it is necessary to test the pressure resistance of the threaded joint, the external controller starts the hydraulic cylinder, which then moves the pressure plate downward. During the movement, the telescopic rod 2 can maintain the stability of movement. The pressure plate contacts the surface of the threaded joint. As the pressure output by the hydraulic cylinder gradually increases, the pressure resistance of the threaded joint under different pressures can be tested. The pressure sensor will detect the pressure and transmit it to the outside world, and the deformation degree of the threaded joint under different pressures can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model.

[0024] Figure 2 It is a right side view schematic diagram of the structure of the utility model.

[0025] Figure 3 It is a schematic cross-sectional view of the internal structure of the utility model.

[0026] In the figure: 1 bottom plate, 2 threaded joint female fastener, 3 threaded joint male fastener, 4 support seat, 5 fixing mechanism, 501 fixing plate, 502 fixing block, 503 hydraulic push rod, 504 telescopic rod 1, 6 detection mechanism 1, 601 detection box, 602 pump body, 603 sealing end, 604 sealing joint 1, 605 delivery pipe, 606 nozzle, 607 sealing joint 2, 7 rectangular groove, 8 adjustment mechanism, 801 driving motor, 802 lead screw, 803 storage plate, 804 sliding block, 805 adjustment rod, 9 detection mechanism 2, 901 hydraulic cylinder, 902 pressure plate, 903 telescopic rod 2, 10 bracket, 11 top plate, 12 pressure sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-3 , this embodiment provides a technical solution: a threaded joint performance test device, including a base plate 1, a detection mechanism 9, a threaded joint female fastener 2 and a threaded joint male fastener 3;

[0029] A threaded joint female fastener 2 and a threaded joint male fastener 3 are provided above the bottom plate 1, and the threaded joint female fastener 2 is threadedly connected to the threaded joint male fastener 3, and the lower ends of the threaded joint female fastener 2 and the threaded joint male fastener 3 are fixedly connected with a support seat 4, and the support seat 4 is fixedly connected to the upper end of the bottom plate 1, and a fixing mechanism 5 is provided on the left and right sides of the support seat 4, and a detection mechanism 6 is provided at the front and rear ends of the bottom plate 1, and a rectangular groove 7 is opened at the front and rear ends of the bottom plate 1, and an adjustment mechanism 8 is provided in the rectangular groove 7, and a bracket 10 is evenly installed at the upper end of the middle part of the bottom plate 1, and the upper end of the bracket 10 is fixedly connected to the lower end of the top plate 11, and a detection mechanism 6 is provided on the top plate 11;

[0030] The detection mechanism 6 includes a detection box 601, a pump body 602 and a sealing end 603. The pump body 602 is fixedly installed inside the detection box 601, and the sealing end 603 is fixedly installed on the inner side of the detection box 601. The liquid outlet of the pump body 602 is connected to the delivery pipe 605, the delivery pipe 605 is connected to the nozzle 606, and the input end of the pump body 602 is electrically connected to the output end of the external controller.

[0031] When detecting the sealing of the threaded joint, the pump body 602 provides the nozzle 606 with a specified pressure value for measurement. When the specified pressure value is reached, the pump is stopped and maintained for a period of time (such as 10-30 minutes) to observe whether there is any leakage of the detection liquid. It is easy to operate and can effectively judge the sealing of the threaded joint, providing a reference for on-site construction, ensuring the safety and reliability of subsequent construction, and has a simple structure and low cost.

[0032] The detection mechanism 6 also includes a sealing joint 1 604 and a sealing joint 2 607, one sealing end 603 is fixedly connected to the sealing joint 1 604, and the other sealing end 603 is fixedly connected to the sealing joint 2 607, the sealing joint 1 604 is threadedly connected to the female fastener 2 of the threaded joint, and the sealing joint 2 607 is threadedly connected to the male fastener 3 of the threaded joint.

[0033] The threaded joint female fastener 2 and the threaded joint male fastener 3 are threadedly connected to the sealing joint 1 604 and the sealing joint 2 607 respectively, which makes it easy to disassemble and replace the sealing joint 1 604 and the sealing joint 2 607, and realizes rapid installation when performing different performance tests.

[0034] The fixing mechanism 5 includes a fixing plate 501, a fixing block 502 and a hydraulic push rod 503. The fixing block 502 is fixedly installed on the upper end of the base plate 1, and the hydraulic push rod 503 is fixedly installed on the fixing block 502. The output end of the hydraulic push rod 503 is fixedly connected to the fixing plate 501. A telescopic rod 504 is symmetrically installed between the fixing plate 501 and the fixing block 502. The hydraulic pump input end of the hydraulic push rod 503 is electrically connected to the output end of the external controller.

[0035] Start the hydraulic push rod 503, and the hydraulic push rod 503 starts to move with the fixed plate 501. During the movement of the fixed plate 501, the telescopic rod 504 can maintain the stability of movement. The fixed plate 501 starts to fix the threaded joint female fastener 2 and the threaded joint male fastener 3 to prevent the threaded joint female fastener 2 and the threaded joint male fastener 3 from moving during the test, thereby affecting the test results.

[0036] The adjustment mechanism 8 includes a driving motor 801, a lead screw 802 and a storage plate 803. The lead screw 802 is rotatably connected in the rectangular groove 7, and a sliding block 804 is threadedly connected to the lead screw 802. The outer end of the base plate 1 is fixedly installed with the driving motor 801, and the output shaft of the driving motor 801 passes through the base plate 1 and is fixedly connected to the lead screw 802. The upper end of the sliding block 804 is fixedly installed with the storage plate 803, and the detection box 601 is fixedly installed on the storage plate 803. The input end of the driving motor 801 is electrically connected to the output end of the external controller.

[0037] When the sealing performance of the threaded joint needs to be tested, the drive motor 801 is started, and the drive motor 801 then drives the lead screw 802 to start rotating, and during the rotation, the sliding block 804 is driven to move, and then the storage plate 803 and the inspection box 601 are moved, which can help the tester to perform threaded connection between the sealing joint and the threaded joint female fastener 2 and the threaded joint male fastener 3.

[0038] The adjusting rods 805 are symmetrically installed in the rectangular groove 7, and the sliding blocks 804 are symmetrically provided with sliding holes, and the adjusting rods 805 are slidably connected with the sliding holes on the sliding blocks 804.

[0039] The adjustment rod 805 can control or guide the sliding block 804 to slide, thereby reducing the friction force on the sliding block 804 during the movement.

[0040] The detection mechanism 9 includes a hydraulic cylinder 901, a pressure plate 902 and a telescopic rod 903. The hydraulic cylinder 901 is fixedly installed on the upper end of the top plate 11, and a pressure plate 902 is provided below the top plate 11. The output end of the hydraulic cylinder 901 is fixedly connected to the pressure plate 902, and the telescopic rod 903 is evenly connected between the lower ends of the pressure plate 902 and the top plate 11. A pressure sensor 12 is fixedly installed on the support seat 4, and the input end of the hydraulic pump of the hydraulic cylinder 901 is electrically connected to the output end of the external controller, and the output end of the pressure sensor 12 is electrically connected to the input end of the external controller.

[0041] When it is necessary to test the pressure resistance of the threaded joint, the external controller starts the hydraulic cylinder 901, and the hydraulic cylinder 901 then moves the pressure plate 902 downward. During the movement, the telescopic rod 903 can maintain the stability of movement, and the pressure plate 902 contacts the surface of the threaded joint. As the pressure output by the hydraulic cylinder 901 gradually increases, the pressure resistance of the threaded joint under different pressures can be tested. The pressure sensor 12 will detect the pressure and transmit it to the outside world, and the deformation degree of the threaded joint under different pressures can be obtained.

[0042] The working principle of a threaded joint performance test device provided by the utility model is as follows: when detecting the sealing performance of the threaded joint, the pump body 602 provides a specified pressure value for measurement to the nozzle 606. When the specified pressure value is reached, the pump is stopped and maintained for a period of time (such as 10-30 minutes) to observe whether there is leakage of the detection liquid. The utility model is easy to operate and can effectively judge the sealing performance of the threaded joint, providing a reference for on-site construction, ensuring the safety and reliability of subsequent construction, and has a simple structure and low cost. The threaded joint female fastener 2 and the threaded joint male fastener 3 are respectively threadedly connected to the sealing joint 1 604 and the sealing joint 2 607, which makes it easy to disassemble and replace the sealing joint 1 604 and the sealing joint 2 607, and realizes rapid installation when performing different performance tests. The hydraulic push rod 503 is started, and the hydraulic push rod 503 starts to move with the fixed plate 501. During the movement of the fixed plate 501, the telescopic rod 1 504 can maintain the stability of movement. The fixed plate 501 starts to fix the threaded joint female fastener 2 and the threaded joint male fastener 3 to prevent the threaded joint female fastener 2 and The male fastener 3 of the threaded joint moves during the test, thereby affecting the test results. When the sealing performance of the threaded joint needs to be tested, the drive motor 801 is started, and the drive motor 801 then drives the lead screw 802 to start rotating. During the rotation, the sliding block 804 is driven to move, and then the storage plate 803 and the inspection box 601 are moved, which can help the test personnel to thread the sealing joint with the female fastener 2 of the threaded joint and the male fastener 3 of the threaded joint. The adjustment rod 805 can control or guide the sliding block 804 to slide, reducing the friction force on the sliding block 804 during the movement. When the pressure resistance of the threaded joint needs to be tested, the external controller starts the hydraulic cylinder 901, and the hydraulic cylinder 901 then moves the pressure plate 902 downward. During the movement, the telescopic rod 903 can maintain the stability of the movement, and the pressure plate 902 contacts the surface of the threaded joint. As the pressure output by the hydraulic cylinder 901 gradually increases, the pressure resistance of the threaded joint under different pressures can be tested. The pressure sensor 12 transmits the detected pressure to the outside world, and the deformation degree of the threaded joint under different pressures can be obtained.

[0043] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A threaded joint performance test device, characterized in that: It comprises a base plate (1), a second detection mechanism (9), a threaded joint female fastener (2) and a threaded joint male fastener (3); A threaded joint female fastener (2) and a threaded joint male fastener (3) are provided above the base plate (1), the threaded joint female fastener (2) and the threaded joint male fastener (3) are threadedly connected, the lower ends of the threaded joint female fastener (2) and the threaded joint male fastener (3) are fixedly connected to a support seat (4), the support seat (4) is fixedly connected to the upper end of the base plate (1), and the left and right sides of the support seat (4) are provided with a fixing mechanism (5), the front and rear ends of the base plate (1) are provided with a detection mechanism (6), the front and rear ends of the base plate (1) are provided with a rectangular groove (7), and the rectangular groove (7) is provided with an adjustment mechanism (8), the upper end of the middle part of the base plate (1) is evenly installed with a bracket (10), the upper end of the bracket (10) is fixedly connected to the lower end of the top plate (11), and the top plate (11) is provided with a detection mechanism (6); The detection mechanism 1 (6) comprises a detection box (601), a pump body (602) and a sealing end (603); the pump body (602) is fixedly installed inside the detection box (601); the sealing end (603) is fixedly installed on the inner side of the detection box (601); the liquid outlet of the pump body (602) is connected to the delivery pipe (605); the delivery pipe (605) is connected to the nozzle (606); and the input end of the pump body (602) is electrically connected to the output end of the external controller.

2. A threaded joint performance testing device according to claim 1, characterized in that: The detection mechanism 1 (6) also includes a sealing joint 1 (604) and a sealing joint 2 (607), one sealing end (603) is fixedly connected to the sealing joint 1 (604), and the other sealing end (603) is fixedly connected to the sealing joint 2 (607), the sealing joint 1 (604) is threadedly connected to the female fastener (2) of the threaded joint, and the sealing joint 2 (607) is threadedly connected to the male fastener (3) of the threaded joint.

3. A threaded joint performance testing device according to claim 1, characterized in that: The fixing mechanism (5) comprises a fixing plate (501), a fixing block (502) and a hydraulic push rod (503); the fixing block (502) is fixedly mounted on the upper end of the bottom plate (1); the hydraulic push rod (503) is fixedly mounted on the fixing block (502); the output end of the hydraulic push rod (503) is fixedly connected to the fixing plate (501); a telescopic rod (504) is symmetrically mounted between the fixing plate (501) and the fixing block (502); and the hydraulic pump input end of the hydraulic push rod (503) is electrically connected to the output end of an external controller.

4. A threaded joint performance testing device according to claim 1, characterized in that: The adjustment mechanism (8) comprises a driving motor (801), a lead screw (802) and a storage plate (803); the lead screw (802) is rotatably connected in the rectangular groove (7); a sliding block (804) is threadedly connected to the lead screw (802); the driving motor (801) is fixedly mounted on the outer end of the bottom plate (1); the output shaft of the driving motor (801) passes through the bottom plate (1) and is fixedly connected to the lead screw (802); the storage plate (803) is fixedly mounted on the upper end of the sliding block (804); the storage plate (803) is fixedly mounted with a detection box (601); and the input end of the driving motor (801) is electrically connected to the output end of the external controller.

5. A threaded joint performance testing device according to claim 1, characterized in that: The rectangular groove (7) is symmetrically provided with an adjusting rod (805), and the sliding block (804) is symmetrically provided with sliding holes, and the adjusting rod (805) is slidably connected with the sliding holes on the sliding block (804).

6. A threaded joint performance testing device according to claim 1, characterized in that: The second detection mechanism (9) comprises a hydraulic cylinder (901), a pressure plate (902) and a second telescopic rod (903); the hydraulic cylinder (901) is fixedly mounted on the upper end of the top plate (11); a pressure plate (902) is provided below the top plate (11); the output end of the hydraulic cylinder (901) is fixedly connected to the pressure plate (902); the second telescopic rod (903) is evenly connected between the pressure plate (902) and the lower end of the top plate (11); a pressure sensor (12) is fixedly mounted on the support seat (4); the input end of the hydraulic pump of the hydraulic cylinder (901) is electrically connected to the output end of the external controller; and the output end of the pressure sensor (12) is electrically connected to the input end of the external controller.

Images