Tubing hanger metal seal and non-metal seal testing tool

Abstract

The present application discloses a tubing hanger metal seal and non-metal seal test tool, and relates to the technical field of test tools, comprising a control box, two vacuum pumps are fixedly installed on one side of the outer wall of the control box. In the present application, the test tool realizes the dual advantages of multi-working condition simulation and efficient testing through integrated design. The core control box integrates air pressure regulation, temperature control and motion driving functions, and cooperates with the double independent test area structure to synchronously simulate complex working conditions such as high pressure, high temperature, pressure difference and water flow impact. The double-station independent test system supports simultaneous verification of two samples. Through comparative testing, environmental interference factors can be excluded, and differential working condition verification can be carried out on one side. Through multi-dimensional working condition reproduction, sealing design defects are effectively identified, providing a reliable verification scheme for the safe application of the tubing hanger in extreme environments, and significantly improving the testing efficiency and result accuracy.

Description

Technical Field

[0001] This invention relates to the field of testing fixture technology, specifically to testing fixtures for metal and non-metal seals of tubing hangers. Background Technology

[0002] Test fixtures are integrated devices or systems designed and manufactured specifically for the testing needs of products or components. Through the organic combination of mechanical structure, electrical control, sensors, data acquisition modules, and software algorithms, they simulate actual usage environments or extreme working conditions to fix, load, stimulate, monitor, and analyze the data of the object under test, in order to verify its functional integrity, performance parameters, reliability indicators, and design rationality. Its core lies in accurately capturing the response data of the object under test under specific conditions through standardized and repeatable testing processes, providing objective evidence for product development optimization, production quality control, and fault tracing, while also having modular expansion capabilities to adapt to different testing scenario requirements.

[0003] Existing underwater tubing hanger sealing test fixtures can only perform single-dimensional testing at room temperature, static conditions, and under single pressure. They neglect the multi-physics coupling characteristics of the deep-sea environment. They fail to reproduce the thermal expansion and contraction effect of sealing materials caused by temperature fluctuations through a gradient temperature control system, making it impossible to quantify the risk of accelerated material aging under high-temperature conditions. They also lack dynamic pressure loading capabilities, making it impossible to simulate transient pressure pulses generated by valve opening and closing and equipment movement in the high-pressure environment of the deep sea. As a result, the contact stress distribution and leakage risk of the sealing surface under high-pressure fluctuations cannot be accurately captured. Furthermore, they do not integrate a water flow impact simulation device, making it impossible to reproduce the fluid impact force caused by drill string rotation, mud circulation, or tubing vibration during drilling operations, leading to significant errors in the test data. Summary of the Invention

[0004] The purpose of this invention is to provide a testing fixture for the metal and non-metal seals of tubing hangers. By using a vacuum pump, heater, and impact plate, it is possible to simulate multiple operating conditions during the seal test, thereby solving the problems mentioned in the background.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a testing fixture for metal and non-metal seals of an oil pipe hanger, comprising a control box. Two vacuum pumps are fixedly installed on one side of the outer wall of the control box. The output ends of the two vacuum pumps are fixedly connected to air pipes. The output ends of the two air pipes are fixedly connected to the input end of the control box. Two sets of hinges are fixedly installed on one side of the outer wall of the control box. Sealing doors are fixedly installed between the outer walls of the two sets of hinges. Two sets of linear modules are fixedly installed on the inner wall of the control box. A second linear module is fixedly installed between the tops of the two sets of linear modules. Two temperature and pressure sensors and two heaters are provided on one side of the inner wall of the control box. A partition is fixedly inserted into the inner wall of the control box. Reciprocating cylinders are fixedly installed on one side of the outer wall of the two second linear modules. Piston rods are provided at the output ends of the two reciprocating cylinders. Impact plates are fixedly installed at the bottoms of the two piston rods.

[0006] Preferably, a first delivery pipe is fixedly inserted inside the control box. The input end of the first delivery pipe is fixedly connected to a three-way valve. The input end of the three-way valve is fixedly connected to a delivery pump. The output end of the three-way valve is fixedly connected to a second delivery pipe. The outer wall of the second delivery pipe is fixedly inserted inside the control box. The bottom of the inner wall of the control box contacts a first test piece and a second test piece. The first test piece includes a simulated tree body. The inner surface of the simulated tree body is threaded with two sets of fixing bolts.

[0007] Preferably, an upper cover plate is threaded between the outer walls of one of the two sets of fixing bolts, and three flow holes are provided on the outer wall of the simulated oil tree body. A lower cover plate is threaded between the outer walls of the other set of the two sets of fixing bolts.

[0008] Preferably, a tubing hanger is fixedly installed at the bottom of the upper cover plate, and a threaded ring is threadedly connected to the outer wall of the tubing hanger. The outer wall of the threaded ring is movably inserted into the interior of the simulated tree body.

[0009] Preferably, the bottom of the threaded ring is fixedly installed on the top of the lower cover plate, and the outer wall of the tubing hanger is movably fitted with a plurality of simulated metal sealing rings and metal sealing rings.

[0010] Preferably, the second test piece includes a simulated tree body, the inner surface of which is threaded with two sets of fixing bolts, and the outer surface of two sets of fixing bolts is threaded with an upper cover plate.

[0011] Preferably, the outer wall of the simulated oil well body 2 has three flow holes 2, and the outer wall of the other two sets of the two sets of fixing bolts 2 is threadedly connected to a lower cover plate 2.

[0012] Preferably, a tubing hanger 2 is fixedly installed at the bottom of the upper cover plate 2, and a threaded ring 2 is threadedly connected to the outer wall of the tubing hanger 2. The outer wall of the threaded ring 2 is movably inserted into the interior of the simulated tree body 2.

[0013] Preferably, the bottom of the second threaded ring is fixedly installed on the top of the second lower cover plate, and the outer wall of the second oil pipe hanger is movably fitted with multiple simulated non-metallic sealing rings and non-metallic sealing rings.

[0014] Preferably, the outer wall of the second tubing hanger is movably fitted with multiple simulated non-metallic sealing rings and non-metallic sealing rings.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the testing fixture achieves the dual advantages of multi-condition simulation and efficient testing through integrated design. Its core control box integrates air pressure regulation, temperature control, and motion drive functions. With the dual independent test area structure, it can simultaneously simulate complex working conditions such as high pressure, high temperature, pressure difference, and water flow impact. The dual-station independent testing system supports the simultaneous verification of two samples. It can eliminate environmental interference factors through comparative testing and verify different working conditions by opening one side at a time. Through multi-dimensional working condition reproduction, it effectively identifies sealing design defects and provides a reliable verification solution for the safe application of tubing hangers in extreme environments, significantly improving testing efficiency and result accuracy.

[0016] 2. In this invention, the device supports simultaneous comparative testing of two test pieces, and by utilizing the three-hole design of the tubing hanger, the overall performance verification of the metal and non-metal sealing systems can be completed simply by changing the sealing ring and the pressure hole position. This significantly reduces the number of times the equipment is disassembled and the testing cycle, ultimately achieving the dual goals of improving the efficiency of sealing performance testing and controlling costs.

[0017] 3. In use, during the assembly of the test piece, this invention can verify the reliability of the seal through the sealing ring group, and reduce the wear cost of the real seal by using the simulated sealing ring. The fastening design of the upper and lower cover plate structure ensures the axial stability of the sealing ring during high-pressure testing, preventing displacement or detachment due to vibration. Attached Figure Description

[0018] Figure 1 This is a perspective view of the main structure of the metal and non-metal seal testing fixture for the tubing hanger of the present invention. Figure 2 This is a three-dimensional schematic diagram of the metal and non-metal seal testing fixture for the tubing hanger of the present invention. Figure 3 This is a partial perspective view of the metal and non-metal seal testing fixture for the tubing hanger of the present invention. Figure 4 This is a plan view of the internal structure of the metal and non-metal seal testing fixture for the tubing hanger of the present invention. Figure 5 This is a perspective view of test piece one in the test fixture for testing the metal and non-metal seals of the tubing hanger of the present invention. Figure 6 This is a cross-sectional view of test piece one in the test fixture for testing the metal and non-metal seals of the tubing hanger of the present invention. Figure 7 This is a cross-sectional view of test piece two in the test fixture for testing the metal and non-metal seals of the tubing hanger of the present invention.

[0019] In the diagram: 1. Control box; 2. Vacuum pump; 3. Gas pipe; 4. Hinge; 5. Sealing door; 6. Linear module one; 7. Linear module two; 8. Temperature and pressure sensor; 9. Partition plate; 10. Heater; 11. Reciprocating cylinder; 12. Piston rod; 13. Impact plate; 14. Delivery pump; 15. Three-way valve; 16. Delivery pipe one; 17. Test piece one; 171. Simulated tree body one; 172. Fixing bolt one; 173. Top cover plate one; 174. Flow hole one; 175. Lower cover plate 1; 176. Tubing hanger 1; 177. Threaded ring 1; 178. Simulated metal sealing ring; 179. Metal sealing ring; 18. Delivery pipe 2; 19. Test piece 2; 191. Simulated tree trunk body 2; 192. Fixing bolt 2; 193. Upper cover plate 2; 194. Flow hole 2; 195. Lower cover plate 2; 196. Tubing hanger 2; 197. Threaded ring 2; 198. Simulated non-metallic sealing ring; 199. Non-metallic sealing ring. Detailed Implementation

[0020] 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.

[0021] Example 1: Refer to Figure 1 - Figure 7As shown, this invention provides a testing fixture for the metal and non-metal seals of an oil pipe hanger, including a control box 1. Two vacuum pumps 2 are fixedly installed on one side of the outer wall of the control box 1. The output ends of the two vacuum pumps 2 are fixedly connected to air pipes 3. The output ends of the two air pipes 3 are fixedly connected to the input end of the control box 1. Two sets of hinges 4 are fixedly installed on one side of the outer wall of the control box 1. Sealing doors 5 are fixedly installed between the outer walls of the two sets of hinges 4. Two sets of linear modules 1 6 are fixedly installed on the inner wall of the control box 1. A linear module 2 7 is fixedly installed between the tops of the two sets of linear modules 1 6. Two temperature and pressure sensors 8 and two heaters 10 are provided on one side of the inner wall of the control box 1. A partition 9 is fixedly inserted into the inner wall of the control box 1. Reciprocating cylinders 11 are fixedly installed on one side of the outer wall of the two linear modules 2 7. Piston rods 12 are provided at the output ends of the two reciprocating cylinders 11. Impact plates 13 are fixedly installed at the bottoms of the two piston rods 12.

[0022] In this embodiment, during the test preparation phase, the operator must ensure that the control box 1 is completely sealed using the linkage mechanism between the control box 1 and the sealing door 5. The control box 1, as the core control unit, integrates air pressure regulation, temperature control, and motion mechanism drive functions. Its surface-mounted touch panel can display temperature and pressure parameters in real time and receive operation commands. The sealing door 5 is connected to the main body of the control box 1 via hinges 4, ensuring no leakage when the pressure inside the control box 1 changes. A partition 9 divides the control box 1 into two independent test areas, left and right. Each area is equipped with an independent vacuum pump 2, heater 10, and temperature and pressure sensors 8, enabling synchronous comparative testing under different operating conditions. When simulating high-pressure conditions, the operator... The operator must first fix the tubing hanger 176 and tubing hanger 2 196 to the special fixtures on both sides of the partition 9. Then, inject tap water into the control box 1 until it covers the top of the two hangers, ensuring that the sealing surfaces are completely submerged. After closing the sealing door 5, start the vacuum pump 2 through the control box 1. The left vacuum pump 2 is responsible for the pressure regulation of the left test area, and the right vacuum pump 2 independently controls the right area. Both pumps can be set to the same pressure to simulate a pressure equalization environment, or different pressure values ​​can be set to test the sealing performance of the hangers under pressure difference conditions. The temperature and pressure sensor 8 transmits real-time data to the display screen of the control box 1. The operator can adjust the pressurization rate in time according to the pressure change curve. When the pressure reaches After setting the values, the test medium is injected through the injection ports of the two oil pipe hangers to facilitate subsequent leak detection. During high-temperature testing, the liquid in control box 1 must first be emptied and dried before starting heater 10 to heat the interior. The heating power is dynamically adjusted based on feedback data from temperature and pressure sensor 8. Once the temperature reaches the preset value, the test medium is injected again. At this time, the deformation of the hanger seals under thermal expansion must be observed. During water flow impact testing, linear module 1 6 is activated to achieve precise movement of impact disc 13 in the X-axis direction. Subsequently, linear module 2 7 meets the requirement for rapid positioning of impact disc 13 in the Y-axis direction. During testing, the impact disc is first moved through the two linear modules... Position 13 directly above the tubing hanger, and start the reciprocating cylinder 11 to drive the impact disc 13 to impact the water surface at a set frequency, simulating the complex water flow environment in actual working conditions. Observe the leakage of the hanger sealing surface under dynamic load. This test fixture can verify two samples simultaneously in a single test, improving testing efficiency. Furthermore, by simulating different temperature, pressure, and water flow impact conditions, it can comprehensively verify the reliability of the sealing system in complex environments. This fixture, by simulating different temperature, pressure, and water flow impact conditions, can comprehensively verify the reliability of the sealing system in complex environments, effectively identify sealing design defects, and provide reliable data support for the safe application of tubing hangers.

[0023] Example 2: According to Figures 1-4As shown, a first delivery pipe 16 is fixedly inserted inside the control box 1. The input end of the first delivery pipe 16 is fixedly connected to a three-way valve 15. The input end of the three-way valve 15 is fixedly connected to a delivery pump 14. The output end of the three-way valve 15 is fixedly connected to a second delivery pipe 18. The outer wall of the second delivery pipe 18 is fixedly inserted inside the control box 1. The bottom of the inner wall of the control box 1 contacts a first test piece 17 and a second test piece 19.

[0024] In this embodiment, before testing, the operator must first align the threaded end of the delivery pipe 16 with the internal thread of the test piece 17 and slowly screw it in. Similarly, the threaded connection between the delivery pipe 18 and the test piece 19 is completed. Then, the initial state of the three-way valve 15 is checked to confirm that it is in the neutral closed position, that is, neither the two openings nor the main channel are connected. At this time, the delivery pump 14 is turned on, and the pump body draws in the external test liquid and pressurizes it to deliver it to the main channel of the three-way valve 15. The operator adjusts the three-way valve 15 according to the test plan. If two test pieces need to be tested under the same conditions at the same time, the valve core is rotated to fully open the two openings. At this time, the test liquid flows through the three-way valve 15. After diversion, the fluid is simultaneously injected into the internal holes of test piece 17 and test piece 29 through delivery pipe 16 and delivery pipe 2 18, respectively. If differential chemical condition testing is required, only one side of the three-way valve 15 should be opened. During the injection of the test fluid, it is necessary to continuously observe whether there is any leakage on the surface of the test piece and record the real-time values ​​of the pressure gauge and flow meter. After the test, first turn off the delivery pump 14, and then rotate the three-way valve 15 to the neutral closed position to complete the entire test process. The diversion control function of the three-way valve 15 supports two modes: single-piece verification and comparative testing. It can independently evaluate the sealing performance of a single test piece and eliminate environmental interference factors through synchronous testing.

[0025] Example 3: According to Figures 5-7 As shown, test piece 17 includes a simulated tree body 171. The inner wall of the simulated tree body 171 is threaded with two sets of fixing bolts 172. The outer wall of one set of fixing bolts 172 is threaded with an upper cover plate 173. The outer wall of the simulated tree body 171 has three flow holes 174. The outer wall of the other set of fixing bolts 172 is threaded with a lower cover plate 175. The bottom of the upper cover plate 173 is fixedly installed with a tubing hanger 176. The outer wall of the tubing hanger 176 is threaded with a threaded ring 177. The outer wall of the threaded ring 177 is movably inserted into the interior of the simulated tree body 171. The bottom of the threaded ring 177 is fixedly installed on the top of the lower cover plate 175. The outer wall of the tubing hanger 176 is movably fitted with multiple simulated metal sealing rings 178 and metal sealing rings 179. Test piece 219 includes a simulated tree body 2191. The inner wall of the simulated tree body 2191 is threaded with two sets of fixing bolts 2192. The outer walls of two sets of fixing bolts 2192 are threaded with an upper cover plate 2193. The outer wall of the simulated tree body 2191 has three flow holes 2194. The outer walls of the other two sets of fixing bolts 2192 are threaded with a lower cover plate 2195. The bottom of the upper cover plate 2193 is fixedly installed with a tubing hanger 2196. The outer wall of the tubing hanger 2196 is threaded with a threaded ring 2197. The outer wall of the threaded ring 2197 is movably inserted into the interior of the simulated tree body 2191. The bottom of the threaded ring 2197 is fixedly installed on the top of the lower cover plate 2195. The outer wall of the tubing hanger 2196 is movably fitted with multiple simulated non-metallic sealing rings 198 and non-metallic sealing rings 199.

[0026] In this embodiment, when assembling the test piece 17, the user selects one of the three flow holes 174 (upper, middle, and lower) of the tubing hanger 176 as a pressure testing hole, and the remaining two flow holes 174 are used as leakage detection holes to facilitate subsequent observation of liquid leakage. Then, two metal sealing rings 179 and one simulated metal sealing ring 178 are sequentially inserted into the designated sealing groove of the tubing hanger 176. Afterward, the simulated tree body 171 is inserted into the outer surface of the tubing hanger 176, so that the simulated tree... The metal sealing ring 178 is at the same level as the pressure hole. Next, the threaded ring 177 is inserted into the inner hole of the simulated tree body 171. By rotating the threaded ring 177, it is made to tightly engage with the external thread of the tubing hanger 176. Then, the upper cover plate 173 and the lower cover plate 175 are installed, placed on the upper and lower end faces of the simulated tree body 171 respectively. After aligning the bolt holes, the fixing bolts 172 are inserted to ensure that the tubing hanger 176 is firmly fixed to the simulated tree body 171. Within 171, to avoid displacement of the sealing ring or detachment of components due to vibration during high-pressure testing, after assembling test piece 17, test piece 2 19 is installed following the same steps. Only the metal sealing ring 179 and the simulated metal sealing ring 178 need to be replaced with the simulated non-metallic sealing ring 198 and the non-metallic sealing ring 199. Then, the testing system is started, so that the test liquid flows only into the pressure hole of test piece 17. During this period, the transparent observation tube of the leakage detection hole is used to check whether there is liquid leakage. If no liquid leakage occurs, it indicates that the combination of the two metal sealing rings 179 and the simulated metal sealing ring 178 has a good sealing effect. If liquid is discharged from a certain leakage detection hole, the corresponding metal sealing ring 179 can be located to have a sealing defect. This device can quickly test the sealing effect of sealing rings of different positions and materials, reducing the number of equipment disassembly and assembly and the testing cycle. The application of simulated sealing rings not only reduces the testing cost of real sealing rings, but also avoids the stress distortion problem of single sealing ring testing by reproducing the environment of multiple sealing rings coexisting.

[0027] The working principle of the entire mechanism is as follows: The control box 1 is divided into two independent test areas, left and right, by a partition 9. Each area is equipped with an independent vacuum pump 2, heater 10, and temperature and pressure sensor 8, which can realize synchronous comparative testing under different working conditions. The assembly of the test pieces must be strictly carried out in accordance with the standardized process. Taking test piece 17 as an example, the operator must first place the tubing hanger 176 and tubing hanger 196 on the positioning bases on both sides of the partition 9, ensuring that their axes are perpendicular to the partition 9. During the assembly of tubing hanger 176, one of the three flow holes 174 is selected as a pressure hole, and the remaining two are used as leakage detection holes. This selection must be determined according to the preset observation angle in the test plan. Then, two metal sealing rings 179 and one simulated metal sealing ring 178 are successively put into tubing hanger 176. Next, the simulated tree body 171 is fitted onto the outer surface of the hanger, so that the simulated metal sealing ring 178 is at the same level as the pressure hole. The threaded ring 177 must be fully engaged with the external thread of the hanger to prevent loosening during high-pressure testing. The upper cover plate 173 and the lower cover plate 175 are placed on the upper and lower end faces of the simulated tree body 171, respectively. After aligning the bolt holes, the fixing bolt 172 is inserted. The fastening design of the upper cover plate 173 and the lower cover plate 175 ensures the axial stability of the sealing ring during high-pressure testing and prevents displacement or detachment due to vibration. This device supports simultaneous comparative testing of dual test pieces. Only the type of sealing ring needs to be changed to complete the performance verification of metal and non-metal sealing systems, which significantly reduces the number of equipment disassembly and assembly and the testing cycle. At the same time, the application of simulated sealing rings reduces the wear cost of real sealing components.By observing the liquid seepage through the leakage detection hole, the location of the specific failed sealing ring can be quickly identified, providing clear data support for sealing design optimization. This ultimately achieves the dual goals of improving the efficiency of sealing performance testing and controlling costs. The assembly process for test piece 2 (19) is basically the same as that for test piece 1 (17), only requiring the metal sealing ring 179 to be replaced with a simulated non-metallic sealing ring 198 and a non-metallic sealing ring 199. When connecting the pipeline, the operator must align the threaded end of delivery pipe 16 with the internal threaded opening of test piece 17 and slowly screw it in. The connection between delivery pipe 2 (18) and test piece 2 (19) must be identical. The initial state of the three-way valve 15 should ensure the valve core is in the neutral closed position. When injecting tap water into control box 1, ensure the water level covers the hanger. Before starting the test liquid delivery system... The delivery pump 14 needs to be started on the control box 1 panel. The pump body draws in the external test liquid and pressurizes it to deliver it to the main channel of the three-way valve 15. At this time, the operator needs to adjust the state of the three-way valve 15 according to the test plan: If a synchronous test is to be performed, rotate the valve core to fully open both openings. The test liquid is then diverted and injected into the two test pieces through the delivery pipe. If a differential test is to be performed, only one opening is opened. During the injection of the test liquid, the surface of the test piece needs to be continuously observed, with a focus on checking the area around the leakage detection hole. When the test liquid flows into the pressure hole of test piece 17, check the liquid leakage through the observation tube of the leakage detection hole. If no liquid leaks out, it indicates that the combination of the two metal sealing rings 179 and the simulated metal sealing ring 178 has a good sealing effect. If liquid leaks out from a certain leakage detection hole, it indicates that the combination of the two metal sealing rings 179 and the simulated metal sealing ring 178 has a good sealing effect. If the test result is positive, the metal sealing ring 179 at the corresponding location can be located to have a sealing defect. The test method for the simulated non-metallic sealing ring 198 and non-metallic sealing ring 199 in test piece 2 19 is the same. When injecting the test liquid, the vacuum pump 2 is started through the control box 1. The left vacuum pump 2 is responsible for the pressure regulation of the left test area, and the right vacuum pump 2 independently controls the right area. The two pumps can be set to the same pressure to simulate a pressure equalization environment, or different pressure values ​​can be set to test the sealing performance of the hanger under pressure difference conditions. The temperature and pressure sensor 8 transmits real-time data to the display screen of the control box 1. The operator can adjust the pressurization rate in time according to the pressure change curve. When the pressure reaches the set value, the test medium is injected through the injection port of the two oil pipe hangers to facilitate subsequent leakage detection. When testing under high temperature conditions, the system must be emptied first. The liquid inside control box 1 is dried, and then heater 10 is started to heat the interior. The heating power is dynamically adjusted based on the feedback data from temperature and pressure sensor 8. When the temperature rises to the preset value, the test medium is injected again. At this time, the deformation of the hanger seal under thermal expansion needs to be observed. When water flow impact test is required, linear module 1 6 is started to achieve precise movement of impact disc 13 in the X-axis direction. Then, linear module 2 7 meets the requirement of rapid positioning of impact disc 13 in the Y-axis direction. During the test, the two linear modules first position the impact disc 13 directly above the oil pipe hanger. The reciprocating cylinder 11 is started to drive the impact disc 13 to impact the water surface at a set frequency, simulating the complex water flow environment in actual working conditions. The leakage of the hanger sealing surface under dynamic load is observed.

[0028] The wiring diagrams of the vacuum pump 2, linear module 6, linear module 7, temperature and pressure sensor 8, heater 10, reciprocating cylinder 11, and delivery pump 14 in this invention are common knowledge in the field, and their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control methods and wiring arrangements of the vacuum pump 2, linear module 6, linear module 7, temperature and pressure sensor 8, heater 10, reciprocating cylinder 11, and delivery pump 14 will not be explained in detail.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A testing fixture for metal and non-metal seals of a tubing hanger, comprising a control box (1), characterized in that: Two vacuum pumps (2) are fixedly installed on one side of the outer wall of the control box (1). The output ends of the two vacuum pumps (2) are fixedly connected to air pipes (3). The output ends of the two air pipes (3) are fixedly connected to the input end of the control box (1). Two sets of hinges (4) are fixedly installed on one side of the outer wall of the control box (1). A sealing door (5) is fixedly installed between the outer walls of the two sets of hinges (4). Two sets of linear modules (6) are fixedly installed on the inner wall of the control box (1). Linear module two (7) is fixedly installed between the tops of group one (6). Two temperature and pressure sensors (8) and two heaters (10) are provided on one side of the inner wall of the control box (1). A partition (9) is fixedly inserted into the inner surface of the control box (1). A reciprocating cylinder (11) is fixedly installed on one side of the outer wall of the two linear modules two (7). A piston rod (12) is provided at the output end of the two reciprocating cylinders (11). An impact plate (13) is fixedly installed at the bottom of the two piston rods (12).

2. The testing fixture for metal and non-metal seals of the tubing hanger according to claim 1, characterized in that: The control box (1) is fixedly inserted with a first delivery pipe (16). The input end of the first delivery pipe (16) is fixedly connected to a three-way valve (15). The input end of the three-way valve (15) is fixedly connected to a delivery pump (14). The output end of the three-way valve (15) is fixedly connected to a second delivery pipe (18). The outer wall of the second delivery pipe (18) is fixedly inserted inside the control box (1). The bottom of the inner wall of the control box (1) is in contact with a first test piece (17) and a second test piece (19). The first test piece (17) includes a simulated tree body (171). The inner surface of the simulated tree body (171) is threaded with two sets of fixing bolts (172).

3. The testing fixture for metal and non-metal seals of the tubing hanger according to claim 2, characterized in that: The outer walls of one of the two sets of fixing bolts (172) are threaded together with an upper cover plate (173), the outer walls of the simulated oil tree body (171) are provided with three flow holes (174), and the outer walls of the other set of fixing bolts (172) are threaded together with a lower cover plate (175).

4. The testing fixture for metal and non-metal seals of the tubing hanger according to claim 3, characterized in that: The bottom of the upper cover plate (173) is fixedly installed with a tubing hanger (176), and the outer wall of the tubing hanger (176) is threadedly connected with a threaded ring (177). The outer wall of the threaded ring (177) is movably inserted into the interior of the simulated tree body (171).

5. The testing fixture for metal and non-metal seals of the tubing hanger according to claim 4, characterized in that: The bottom of the threaded ring (177) is fixedly installed on the top of the lower cover plate (175), and the outer wall of the tubing hanger (176) is movably fitted with a plurality of simulated metal sealing rings (178) and metal sealing rings (179).

6. The testing fixture for metal and non-metal seals of the tubing hanger according to claim 5, characterized in that: The test piece 2 (19) includes a simulated tree body 2 (191), the inner surface of the simulated tree body 2 (191) is threaded with two sets of fixing bolts 2 (192), and the outer surface of the two sets of fixing bolts 2 (192) is threaded with an upper cover plate 2 (193).

7. The tubing hanger metal and non-metal seal testing fixture according to claim 6, characterized in that: The outer wall of the simulated tree body 2 (191) has three flow holes 2 (194), and the outer wall of the other two sets of the two sets of fixing bolts 2 (192) is threadedly connected to the outer wall of the other two sets of bolts 2 (195).

8. The testing fixture for metal and non-metal seals of the tubing hanger according to claim 7, characterized in that: The bottom of the upper cover plate 2 (193) is fixedly installed with a tubing hanger 2 (196), and the outer wall of the tubing hanger 2 (196) is threadedly connected with a threaded ring 2 (197). The outer wall of the threaded ring 2 (197) is movably inserted into the interior of the simulated tree body 2 (191).

9. The testing fixture for metal and non-metal seals of the tubing hanger according to claim 8, characterized in that: The bottom of the threaded ring 2 (197) is fixedly installed on the top of the lower cover plate 2 (195), and the outer wall of the oil pipe hanger 2 (196) is movably fitted with multiple simulated non-metallic sealing rings (198) and non-metallic sealing rings (199).

10. The testing fixture for metal and non-metal seals of the tubing hanger according to claim 9, characterized in that: The outer wall of the second tubing hanger (196) is movably fitted with multiple simulated non-metallic sealing rings (198) and non-metallic sealing rings (199).

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