Mechanical property testing device for underwater wellhead connector

Abstract

The invention provides an underwater wellhead connector mechanical property testing device, and relates to the technical field of mechanical property testing devices.The device comprises a supporting mechanism which comprises a first supporting unit and a second supporting unit, and a pressurizing device is arranged between the first supporting unit and the second supporting unit; the simulated high-pressure well mouth is arranged on the first supporting unit and comprises a first connector used for being connected with the first end of a well mouth connector; the simulated Christmas tree is arranged on the second supporting unit and comprises a second connector used for being connected with the second end of the wellhead connector; the power unit is used for providing power for the pressurizing device; and the console is connected with the power unit and is used for controlling the loading force applied to the wellhead connector by the pressurizing device. The device is used for simulating and applying various load conditions to evaluate the underwater wellhead connector, and the safety and reliability of the underwater wellhead connector in oil and gas exploitation operation are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical performance testing devices, in particular to a mechanical performance testing device for an underwater wellhead connector. Background Art

[0002] The underwater wellhead connector is a key component connecting the underwater wellhead and the underwater oil production tree. When performing wellhead connection operations underwater, it has the functions of guiding, fixing and locking the wellhead.

[0003] During operation, underwater wellhead connectors are subjected to a variety of complex load conditions such as tension, compression, bending, and torsion. Their performance directly determines the reliability and safety of underwater production systems, equipment, and personnel. Therefore, very high requirements are placed on their body strength, connection performance, and sealing performance. They must not only be able to achieve rapid underwater connection, but also be able to quickly disconnect in emergencies such as typhoons, allowing personnel and surface equipment to be evacuated in a timely manner.

[0004] With the increase in the development of deepwater oil and gas fields, higher requirements are placed on the mechanical properties of wellhead connectors, such as material strength and pressure resistance.

[0005] Therefore, there is an urgent need for a mechanical performance testing device for underwater wellhead connectors to verify the reliability of underwater wellhead connectors under these extreme conditions. Summary of the Invention

[0006] The present invention aims to provide a mechanical performance testing device for underwater wellhead connectors that simulates and applies various load conditions to evaluate the connectors and ensure their safety and reliability during oil and gas production operations. The various technical benefits achieved by the preferred technical solutions provided by this invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] The present invention provides a device for testing the mechanical properties of an underwater wellhead connector, comprising:

[0009] The supporting mechanism includes a first supporting unit and a second supporting unit, wherein a pressurizing device is provided between the first supporting unit and the second supporting unit;

[0010] A simulated high-pressure wellhead, provided on the first support unit, comprising a first connector for connecting to a first end of a wellhead connector;

[0011] a simulated Christmas tree, disposed on the second support unit, comprising a second connector for connecting to the second end of the wellhead connector;

[0012] A power unit, used to provide power to the pressurizing device;

[0013] A control console is connected to the power unit and is used to control the loading force applied by the pressurizing device to the wellhead connector.

[0014] Preferably, the first supporting unit and the second supporting unit are arranged opposite to each other, and central axes of the first joint and the second joint are collinear.

[0015] Preferably, the pressurizing devices include at least two groups, and the pressurizing devices are evenly distributed around the central axis.

[0016] Preferably, the pressurizing device includes a hydraulic cylinder, the power unit includes a hydraulic device, and the hydraulic device is connected to the hydraulic cylinder to provide pressure to the hydraulic cylinder.

[0017] Preferably, a hydraulic interface is provided on the side of the simulated high-pressure wellhead, and the hydraulic interface can be connected to the hydraulic device for injecting fluid into and pressurizing the simulated high-pressure wellhead.

[0018] Preferably, the apparatus further comprises a static pressure system, wherein the static pressure system is capable of applying a hydrostatic load to the wellhead connector.

[0019] Preferably, the first supporting unit includes a fixing bracket and a first frame, the first frame is arranged on the fixing bracket, and the simulated high-pressure wellhead is connected to the first frame.

[0020] Preferably, the second supporting unit includes:

[0021] A movable bracket is arranged opposite to the fixed bracket and connected via a positioning rod, and a track is provided on the top of the movable bracket;

[0022] The mobile rail car has a pulley set at the bottom that can slide with the track;

[0023] The second frame is arranged on the mobile rail vehicle, and the simulated Christmas tree is arranged on the second frame.

[0024] Preferably, the second support unit further includes two sets of limiting mechanisms, both of which are provided on the movable bracket, and the two sets of limiting mechanisms are respectively located on both sides of the movable rail vehicle, and each set of limiting mechanisms includes:

[0025] Bases, including two, arranged along the moving direction of the second frame, each of the bases being provided with a lead screw assembly;

[0026] The two ends of the push plate are respectively connected to the two bases. A plurality of first holes are set on the push plate. The first holes can be connected to the second holes set on the side wall of the mobile rail car through pins.

[0027] Preferably, the pressurizing device further comprises a connecting female head, a porous connecting rod and a latch mechanism, wherein:

[0028] Both sides of the connecting female connector are connected to the hydraulic cylinder and the porous connecting rod respectively, the hydraulic cylinder is connected to the first frame, and the porous connecting rod is connected to the second frame;

[0029] The latch mechanism can be inserted into the hole of the porous connecting rod.

[0030] The underwater wellhead connector mechanical performance testing device provided by the present invention includes a support mechanism, a simulated high-pressure wellhead, a simulated oil production tree, a power unit and a control console. It can simulate actual working conditions and perform tension / compression load and bending moment load tests on the wellhead connector to ensure that it can still work well under large loads of tension, compression and bending. It is an essential guarantee for the safe and reliable production of underwater production systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 It is a structural schematic diagram of an embodiment of a device for testing the mechanical properties of an underwater wellhead connector according to the present invention;

[0033] Figure 2 yes Figure 1 Structural diagram from another angle;

[0034] Figure 3 It is a structural schematic diagram of the positioning rod in the underwater wellhead connector mechanical performance testing device of the present invention;

[0035] Figure 4 yes Figure 3 Schematic diagram of the top view structure;

[0036] Figure 5 It is a structural schematic diagram of the limit mechanism in the underwater wellhead connector mechanical performance testing device of the present invention;

[0037] Figure 6 It is a structural schematic diagram of the latch mechanism in the underwater wellhead connector mechanical performance testing device of the present invention.

[0038] In the figure: 1. Support mechanism; 11. First support unit; 111. Fixed bracket; 112. First frame; 12. Second support unit; 121. Traveling bracket; 122. Mobile rail car; 123. Second frame; 124. Limiting mechanism; 1241. Base; 1242. Push plate; 1243. Screw assembly; 2. Simulated high-pressure wellhead; 3. Simulated oil tree; 4. Power unit; 5. Control console; 6. Pressurizing device; 61. Hydraulic cylinder; 62. Connecting female end; 63. Multi-hole connecting rod; 64. Pin mechanism; 7. Wellhead connector; 8. Static pressure system; 9. Positioning rod; 91. Extension rod female V-block; 92. Male V-block; 93. Pin shaft. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

[0042] Figure 1 It is a structural diagram of this embodiment, as shown in FIG. Figure 1 As shown, this embodiment provides an underwater wellhead connector mechanical performance testing device, including a support mechanism 1, a simulated high-pressure wellhead 2, a simulated Christmas tree 3, a power unit 4 and a console 5.

[0043] The support mechanism 1 includes a first support unit 11 and a second support unit 12, and a pressurizing device 6 is provided between the first support unit 11 and the second support unit 12. Optionally, in this embodiment, the first support unit 11 and the second support unit 12 are arranged opposite to each other.

[0044] The simulated high-pressure wellhead 2 is arranged on the first support unit 11. The simulated high-pressure wellhead 2 includes a first joint for connecting to the first end of the wellhead connector 7. A locking structure and a sealing structure are provided at the first joint to ensure the stability of the connection with the wellhead connector 7.

[0045] The simulated Christmas tree 3 is mounted on the second support unit 12 and includes a second joint for connecting to the second end of the wellhead connector 7. The central axes of the first and second joints are collinear. A locking mechanism and a sealing structure are provided at the second joint to ensure a stable connection with the wellhead connector 7.

[0046] The pressurizing devices 6 in this embodiment include at least two groups, each uniformly distributed around the central axis. Specifically, in this embodiment, two groups of pressurizing devices 6 are provided, one on each side of the central axis, i.e., two groups of pressurizing devices 6 are provided on either side of the test piece's wellhead connector 7. During use, by adjusting the direction and magnitude of the loading force of the pressurizing devices 6 on either side of the wellhead connector 7, various types of loads, such as tension, compression, bending, tension bending, and compression bending, can be applied to the wellhead connector 7, allowing for load tests such as tension, pressure, pure bending moment, tension bending moment, and pressure bending moment to verify the test piece's performance.

[0047] The power unit 4 in this embodiment is used to provide power to the pressurizing device 6. Optionally, the pressurizing device 6 includes a hydraulic cylinder 61, and the power unit 4 includes a hydraulic device connected to the hydraulic cylinder 61 via a hydraulic pipeline to provide pressure to the hydraulic cylinder. Specifically, during operation, this embodiment controls the magnitude, direction, and extension and retraction stroke of the hydraulic cylinder by injecting hydraulic oil into the hydraulic cylinder via the hydraulic power unit.

[0048] The console 5 is connected to the power unit 4 and is used to control the loading force applied by the pressurizing device 6 to the wellhead connector 7. In this embodiment, the console 5 includes hardware devices such as an industrial computer, a PLC module, and a display, as well as software systems such as configuration and monitoring software. The console 5 can control the hydraulic cylinder's loading force, direction, and telescopic stroke, as well as the internal water pressure of the wellhead connector 7. It can perform functions such as hydraulic cylinder load loading, displacement, and stress detection. It also provides comprehensive monitoring and control of the testing process, displaying test data curves such as pressure, tension, and bending moment in real time, and displaying test data in real time through a data acquisition system to evaluate the performance of materials, structures, or components under complex loading environments.

[0049] Optionally, the underwater wellhead connector mechanical properties testing device in this embodiment also has a complete safety design through the console 5, including overpressure alarm, leakage alarm, emergency shutdown and other functions to ensure the safety of the testing process.

[0050] As an optional embodiment, a hydraulic interface is provided on the side of the simulated high-pressure wellhead 2, which can be connected to a hydraulic device for injecting fluid and pressurizing the simulated high-pressure wellhead 2. When in use, locking and sealing between the wellhead connector 7 and the simulated high-pressure wellhead 2, and between the wellhead connector 7 and the simulated oil production tree 3 are achieved by pressurization.

[0051] This embodiment also includes a static pressure system 8, which can apply a hydrostatic load to the hydraulic channel of the wellhead connector 7 and has the functions of pressurization, pressure maintenance, and pressure relief.

[0052] During the test, after the wellhead connector 7 is installed, the static pressure system 8 is connected to the hydraulic interface on the side of the simulated high-pressure wellhead 2 through a hydraulic pipeline, and water is injected into the wellhead connector 7 to simulate the internal working state of the wellhead connector 7.

[0053] The static pressure system 8 and the power unit 4 in this embodiment are both connected to the control console 5 and are operated in an electrically controlled hydraulic manner. The solenoid valves are controlled by the control console to control the movement of each hydraulic component, thereby controlling the movement of the actuator and accurately controlling the loading force, direction and telescopic stroke of the hydraulic cylinder 61.

[0054] As an optional embodiment, the first support unit 11 includes a fixing bracket 111 and a first frame 112. The first frame 112 is disposed on the fixing bracket 111, and the simulated high-pressure wellhead 2 is connected to the first frame 112. In this embodiment, a flange structure is provided on the simulated high-pressure wellhead 2, and the simulated high-pressure wellhead 2 is connected and fixed to the first frame 112 via the flange structure.

[0055] Figure 2 yes Figure 1 A structural diagram from another angle, such as Figure 2 As shown, the second support unit 12 includes a movable bracket 121, a mobile trolley 122, and a second frame 123. The movable bracket 121 is arranged opposite the fixed bracket 111 and connected by a positioning rod 9. A track is provided on the top of the movable bracket 121; a pulley block is provided at the bottom of the mobile trolley 122, which can slide with the track to reduce friction during movement. The second frame 123 is mounted on the mobile trolley 122, and the simulated Christmas tree 3 is mounted on the second frame 123.

[0056] In this way, the second frame 123 and the simulated Christmas tree 3 can be moved forward and backward along the track, so that the mechanical properties of a larger underwater connector can be tested without moving the fixed bracket 111 and the movable bracket 121.

[0057] Alternatively, as Figure 3 and Figure 4 As shown, the positioning rod 9 in this embodiment includes a female extension rod V-block 91, a male V-block 92, and a pin 93. The female extension rod V-block 91 is bolted to the floating bracket 121, while the male V-block 92 is also bolted to the fixed bracket 111. During use, the male and female V-blocks are connected by the pin 93. The structural coordination of the male and female V-blocks allows for rapid positioning and installation of the floating bracket 121 and the fixed bracket 111, improving installation efficiency.

[0058] The fixed bracket 111 and the movable bracket 121 are rigidly connected by the positioning rod 9 to prevent the relative positions of the movable bracket 121 and the fixed bracket 111 from changing due to the forward and backward movement of the porous connecting rod 63 relative to the supporting frame during the subsequent pin installation of the porous connecting rod 63.

[0059] The movable bracket 121 and the fixed bracket 111 are arranged relative to each other, the first frame 112 is set on the fixed bracket 111, and a track is set on the top of the movable bracket 121, and a pulley group that can slide with the track is set at the bottom of the movable rail car 122, and the second frame 123 is set on the movable rail car 122, so that the support mechanism 1 has a horizontal adjustable structure, which can realize stepless adjustment of the test space, provide the load required for testing for wellhead connectors 7 of different sizes and specifications, and realize load tests such as tension, pressure, pure bending moment, tension bending moment, and pressure bending moment on the test piece.

[0060] During testing, wellhead connector 7 is placed flat between first support unit 11 and second support unit 12 to ensure connector safety and reliability under extreme conditions. In this embodiment, simulated Christmas tree 3 is provided with a flange structure, which is connected and fixed to second frame 123 via the flange structure.

[0061] As an optional implementation, Figure 5 As shown, the second support unit 12 in this embodiment also includes two groups of limiting mechanisms 124. The two groups of limiting mechanisms 124 are both arranged on the movable bracket 121, specifically on both sides of the top surface of the movable bracket 121, that is, the two groups of limiting mechanisms 124 are respectively located on both sides of the movable rail vehicle 122, and each group of limiting mechanisms 124 includes a base 1241 and a push plate 1242.

[0062] There are two bases 1241 arranged along the moving direction of the second frame 123 , and a screw assembly 1243 is provided on each base 1241 ; the screw assembly 1243 includes a base and a screw structure installed on the base.

[0063] Both ends of the push plate 1242 are connected to the two bases 1241 respectively. A plurality of first holes are provided on the push plate 1242. The first holes can be connected to the second holes provided on the side wall of the mobile rail vehicle through pins.

[0064] As the second frame 123 moves forward and backward, the push plate 1242 of the limiting mechanism 124 tightens, limiting the motion of the second frame 123 and causing it to move in a straight line. During the loading test, the limiting mechanism 124 opens, maintaining sufficient clearance between the limiting mechanism 124 and the second frame 123 to prevent any deformation of the load-bearing frame during loading.

[0065] To facilitate connection between the pressurizing device 6 and the support mechanism 1, the pressurizing device 6 in this embodiment further includes a female connector 62, a porous connecting rod 63, and a latch mechanism 64. The female connector 62 is connected to the hydraulic cylinder 61 and the porous connecting rod 63 on both sides, respectively. The hydraulic cylinder 61 has a pin hole on one side, which allows for a fixed pin connection with the first frame 112. This pin connection of the hydraulic cylinder can, to a certain extent, correct deviation and prevent the hydraulic cylinder from experiencing significant deformation or overtorque. The other side of the hydraulic cylinder 61 has external threads, and one end of the porous connecting rod 63 is provided with external threads. The female connector 62 has threaded holes on both sides for connecting the hydraulic cylinder 61 and the porous connecting rod 63.

[0066] In this embodiment, three equally spaced pin holes are provided on one side of the multi-hole connecting rod 63 for connection to the second frame 123. The appropriate pin hole can be selected based on the size of the wellhead connector 7. The telescopic stroke of the hydraulic cylinder 61 is greater than the spacing between the pin holes. The three pin holes in different locations, combined with the telescopic stroke of the hydraulic cylinder 61, enable stepless adjustment of the spacing between the test fixtures of the wellhead connector 7.

[0067] Figure 6 Schematic diagram of the structure of the latch mechanism in this embodiment. Figure 6 As shown, the latch mechanism 64 can be inserted into the hole of the porous connecting rod 63. When the porous connecting rod 63 changes the pin hole position, the second frame 123 is connected to the push plate 1242 through the pin, and the porous connecting rod 63 moves back and forth relative to the second frame 123, which can smoothly change the pin hole position and connect.

[0068] Optionally, the latch mechanism 64 in this embodiment may adopt a hydraulic cylinder latch. When the connecting rod pin needs to be removed, the pin is slowly pushed out by the hydraulic cylinder, and the hydraulic cylinder is controlled by the console, which reduces the risk of human operation and saves manpower.

[0069] The fixed bracket 111 in this embodiment is located at the bottom of one side of the underwater wellhead connector mechanical performance testing device, and serves as the supporting structure of the testing device. A first frame 112 for bearing weight is provided on the top. The fixed bracket 111 adopts a steel plate structure to increase the force-bearing area of ​​the entire device. The floating bracket 121 is located at the bottom of the other side of the underwater wellhead connector mechanical performance testing device, corresponding to the fixed bracket 111. As the supporting structure of the test platform, two sliding rails are designed on the top, and a movable rail and a limit fixing device are provided at the bottom, which can be adjusted to the left and right positions. The overall structure is a steel plate, which increases the force-bearing area of ​​the wellhead connector test fixture.

[0070] In this embodiment, the first frame 112 and the second frame 123 are respectively placed on the fixed bracket 111 and the mobile rail car 122, and are the loading force transmission components used to simulate the flange connection of the high-pressure well head and the oil production tree, and are also used for the fixed connection between the hydraulic cylinder 61 and the porous connecting rod 63.

[0071] Optionally, the hydraulic device in this embodiment is provided with a dual pump system, one is to supply liquid to the hydraulic cylinder 61 with a large displacement through a 35MPa hydraulic pump, and the other is to supply liquid to the hydraulic cylinder 61 with a small displacement through two pneumatic booster pumps.

[0072] When the test piece is installed, the hydraulic cylinder 61 drives the second frame 123 to move forward and backward, adjusting the length distance to meet the installation requirements of the test piece in the length direction. At this time, a hydraulic pump is used for large-volume perfusion, and the second frame 123 moves quickly, thereby improving the efficiency of test piece installation.

[0073] During the load test of the test piece, two pneumatic booster pumps are used to supply a small amount of fluid to the hydraulic cylinder 61, and the cylinder pressure is slowly increased to ensure that the external load is applied smoothly and slowly, while improving the accuracy of the loaded load and avoiding overload.

[0074] The working principle of this embodiment is:

[0075] When the wellhead connector 7 is subjected to a tensile test, the hydraulic cylinder 61 is pressurized through the power unit 4. The two hydraulic cylinders 61 act together in the same direction, and the rods of the hydraulic cylinders 61 extend outward with the same force and synchronous loading speed, pushing the second frame 123 outward and transmitting the tensile force to the wellhead connector 7. After the tensile force reaches the preset value, the pressure is maintained for 15 minutes to obtain the load curve.

[0076] When the wellhead connector 7 is pressure tested, the two hydraulic cylinders 61 act together in the same direction, the rods of the hydraulic cylinders 61 retract inward, the same force is applied, the loading speed is synchronized, the second frame 123 is pulled inward, and the pulling force is transmitted to the wellhead connector 7. After the pressure reaches the preset value, the pressure is maintained for 15 minutes to obtain the load curve.

[0077] When performing a pure bending moment test on the wellhead connector 7, the two hydraulic cylinders 61 act together in opposite directions, with one hydraulic cylinder rod contracting inward and the other extending outward. The same force is applied and the loading speed is synchronized. The bending moment is transmitted to the wellhead connector 7 through the second frame 123. After the pure bending moment load reaches the preset value, the pressure is maintained for 15 minutes to obtain the load curve.

[0078] When the wellhead connector 7 is subjected to a tension and bending moment test, the two hydraulic cylinders 61 act together in the same direction. According to the predetermined tension values, the rods of the two hydraulic cylinders 61 are extended outward to different distances. The predetermined force is transmitted to the wellhead connector 7 through the second frame 123. After the tension and bending moment load reaches the preset value, the pressure is maintained for 15 minutes to obtain the load curve.

[0079] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A mechanical performance testing device for underwater wellhead connectors, characterized in that: include: The supporting mechanism includes a first supporting unit and a second supporting unit, wherein a pressurizing device is provided between the first supporting unit and the second supporting unit; A simulated high-pressure wellhead, provided on the first support unit, comprising a first connector for connecting to a first end of a wellhead connector; a simulated Christmas tree, disposed on the second support unit, comprising a second connector for connecting to the second end of the wellhead connector; A power unit, used to provide power to the pressurizing device; A control console is connected to the power unit and is used to control the loading force applied by the pressurizing device to the wellhead connector.

2. The underwater wellhead connector mechanical performance testing device according to claim 1, characterized in that: The first supporting unit and the second supporting unit are arranged opposite to each other, and central axes of the first joint and the second joint are collinear.

3. The underwater wellhead connector mechanical performance testing device according to claim 2, characterized in that: The pressurizing devices include at least two groups, and the pressurizing devices are evenly distributed around the central axis.

4. The underwater wellhead connector mechanical performance testing device according to any one of claims 1 to 3, characterized in that: The pressurizing device includes a hydraulic cylinder, and the power unit includes a hydraulic device. The hydraulic device is connected to the hydraulic cylinder and is used to provide pressure to the hydraulic cylinder.

5. The underwater wellhead connector mechanical performance testing device according to claim 4, characterized in that: A hydraulic interface is provided on the side of the simulated high-pressure wellhead, and the hydraulic interface can be connected to the hydraulic device for injecting fluid into and pressurizing the simulated high-pressure wellhead.

6. The underwater wellhead connector mechanical performance testing device according to claim 5, characterized in that: Also included is a static pressure system capable of applying a hydrostatic load to the wellhead connector.

7. The underwater wellhead connector mechanical performance testing device according to claim 4, characterized in that: The first supporting unit includes a fixing bracket and a first frame, the first frame is arranged on the fixing bracket, and the simulated high-pressure wellhead is connected to the first frame.

8. The underwater wellhead connector mechanical performance testing device according to claim 7, characterized in that: The second supporting unit includes: A movable bracket is arranged opposite to the fixed bracket and connected via a positioning rod, and a track is provided on the top of the movable bracket; The mobile rail car has a pulley set at the bottom that can slide with the track; The second frame is arranged on the mobile rail vehicle, and the simulated Christmas tree is arranged on the second frame.

9. The underwater wellhead connector mechanical performance testing device according to claim 8, characterized in that: The second support unit further includes two sets of limiting mechanisms, both of which are arranged on the movable bracket, and the two sets of limiting mechanisms are respectively located on both sides of the movable rail vehicle, and each set of limiting mechanisms includes: Bases, including two, arranged along the moving direction of the second frame, each of the bases being provided with a lead screw assembly; The two ends of the push plate are respectively connected to the two bases. A plurality of first holes are set on the push plate. The first holes can be connected to the second holes set on the side wall of the mobile rail car through pins.

10. The underwater wellhead connector mechanical performance testing device according to claim 8, characterized in that: The pressurizing device further comprises a connecting female head, a porous connecting rod and a latch mechanism, wherein: Both sides of the connecting female connector are connected to the hydraulic cylinder and the porous connecting rod respectively, the hydraulic cylinder is connected to the first frame, and the porous connecting rod is connected to the second frame; The latch mechanism can be inserted into the hole of the porous connecting rod.

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