Buckling device and oil pipe hanger crossing test device

Abstract

The invention discloses a buckling device and an oil pipe hanger crossing test device, and relates to the technical field of underwater Christmas tree equipment.The buckling device comprises a first connector, a second connector and a fixing assembly, when the buckling device is in a butt joint state, a first valve element abuts against a second valve element, and under the cooperation of a first reset piece and a second reset piece, the first valve element and the second valve element are fixed; the first equipment is communicated with the first valve cavity through the first valve cavity and the second valve cavity; the fixing assembly improves the stability when the first connector and the second connector are in butt joint, shaking of the first connector and / or the second connector is reduced, the first connector and the second connector can maintain the butt joint state more stably, and the problems of contamination and corrosion of first equipment and / or second equipment are solved; when the buckling device is in the disconnected state, the first valve element and the first valve seat form a first sealing pair, and the second valve element and the second valve seat form a second sealing pair, so that the problem that external impurities such as dust or seawater enter the first equipment and the second equipment is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fasteners, and in particular to a fastener and an oil pipe hanger crossing test device. Background Art

[0002] The fastener includes two connectors, which are connected to the first device and the second device respectively. By connecting the two connectors, the first device and the second device can be connected, so that a medium such as hydraulic oil can flow between the two devices, or a cable can be sent into the first device or the second device through the first connector and the second connector. However, whether the fastener is used in a ground or underwater environment, impurities in the air or seawater can easily enter the corresponding device through the first connector or the second connector, causing contamination or corrosion of the relevant equipment. Moreover, when the first device and the second device are connected through the fastener, they are affected by loads such as wind or water, which can easily cause the joint between the first connector and the second connector to loosen, resulting in the disconnection of the first connector and the second connector, which undoubtedly further increases the corrosion and contamination in the corresponding equipment.

[0003] Therefore, how to reduce the contamination and corrosion of two devices connected by a buckle has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] The object of the present invention is to provide a fastener and an oil pipe hanger crossing test device to reduce the contamination and corrosion generated in a first device and a second device connected by the fastener.

[0005] To achieve the above object, the present invention provides the following solutions: The present invention provides a fastener, which includes a first joint, a second joint and a fixing assembly: The first joint includes a first valve body, a first valve cavity is provided in the first valve body, a first valve seat, a first valve core and a first return member are provided in the first valve cavity, the first valve core is slidably provided in the first valve cavity, two ends of the first return member are respectively abutted against the first valve core and the first valve body, and the first return member applies a first force to the first valve core toward the first valve seat; The second joint includes a second valve body, a second valve cavity is provided in the second valve body, a second valve seat, a second valve core and a second return member are provided in the second valve cavity, two ends of the second return member are respectively abutted against the second valve core and the second valve body, the second valve core is slidably provided in the second valve cavity, and the second return member applies a second force on the second valve core toward the second valve seat; Wherein, the first valve chamber is used to communicate with a first device, and the second valve chamber is used to communicate with a second device; the first acting force and the second acting force are arranged opposite to each other and are equal; When the snap-fit device is in a disconnected state, the first valve core and the first valve seat form a first sealing pair, and the second valve core and the second valve seat form a second sealing pair; When the snap-fit device is in a docking state, the first connector moves a preset distance toward the second connector under the action of external force, so that the first valve core and the second valve core offset each other, and the first device is connected to the second device through the first valve cavity, and the second valve cavity is connected to the second device; the fixing assembly is used to fix the first connector to the second device, and / or to fix the second connector to the first device.

[0006] Preferably, the first valve core is located in the first valve cavity, the second valve core is located in the second valve cavity, and when the snap-fit device is in the docking state, the second end of the first connector and the first end of the second connector are sleeved together; And / or, when the snap-fit device is in the docking state, the second end of the first connector and the first end of the second connector are abutted against each other; when the snap-fit device is in the disconnected state, the end of the first valve core away from the first reset member is located outside the second end of the first connector, and / or the end of the second valve core away from the second reset member is located outside the first end of the second connector.

[0007] Preferably, when the snap fitter is in the docking state, the first valve cavity and the second valve cavity are coaxially arranged, and the first valve core and the second valve core are coaxially arranged.

[0008] Preferably, the snap-fit device includes a guide assembly, the guide assembly includes a first guide member and a second guide member, the first guide member includes the second end of the first valve body, the second end of the first valve body forms a first guide ring, the second guide member includes the first end of the second valve body, and the first end of the second valve body is provided with a first guide groove that can form a first guide pair with the first guide ring.

[0009] Preferably, the guide assembly also includes a third guide member and a fourth guide member, a second guide ring is provided on the outside of the first guide ring, the third guide member includes a second guide groove provided between the first guide ring and the second guide ring, and the fourth guide member includes a third guide ring provided on the outside of the first guide groove, and the second guide groove can form a second guide pair with the third guide ring.

[0010] Preferably, the guide assembly also includes a fifth guide member and a sixth guide member, the fifth guide member includes a fourth guide ring arranged between the first guide ring and the second guide ring, the sixth guide member includes a fifth guide ring arranged between the first guide groove and the third guide ring, and the fourth guide ring and the fifth guide ring can form a third guide pair.

[0011] Preferably, the snap-fit device further includes a sealing assembly, which includes a first sealing unit arranged between the second valve body and the fifth guide ring, and a second sealing unit arranged between the first guide ring and the fifth guide ring.

[0012] In addition, the present invention also provides a tubing hanger crossing test device, which includes the above-mentioned fastener and a simulated tubing hanger, and the simulated tubing hanger is the first device or the second device.

[0013] Preferably, the simulated tubing hanger is the second device, the second valve body is fixed on the simulated tubing hanger, and the first valve body is fixed on the test disc; The fixing assembly includes a first fixing member. When the fastener is in the docking state, the first fixing member is used to fix the test disc on the simulated tubing hanger.

[0014] Preferably, the first fixing member includes a first connecting section and a second connecting section that are connected to each other, the first connecting section is used to be fixedly connected to the test disk, and when the fastener is in the docking state, the second connecting section is located at the end of the first valve body away from the test disk, the second connecting section is used to be connected to the simulated oil tubing hanger, and the movement stroke of the second connecting section toward the simulated oil tubing hanger is not less than the distance between the first valve core and the second valve core.

[0015] Compared with the prior art, the present invention has achieved the following technical effects: The cam is secured to the cam face and is adapted to engage the cam face of the valve body, wherein the cam face is secured to the cam face and is adapted to engage the cam of the valve body. When the fastener is in a docking state, under an external force (the external force may be a force applied by a mechanical device such as a manipulator or an operator to the first joint and / or the second joint), after the first valve core moves toward the second valve core by a preset distance, the first valve core first abuts against the second valve core, and then after the first valve core continues to approach the second valve core, the first restoring member and the second restoring member are both compressed, and because the first force and the second force are equal, the first valve core moves toward a direction away from the first valve seat, and the second valve core moves toward a direction away from the second valve seat, so that the first device is connected to the second device through the first valve cavity and the second valve cavity, thereby allowing liquid to flow between the first device and the second device; Furthermore, the fastener further comprises a fixing assembly, which is used to fix the first joint to the second device and / or the second joint to the first device when the fastener is in the docking state. This improves the stability of the first joint and the second joint when docking, reduces the shaking of the first joint and / or the second joint, and enables the first joint and the second joint to maintain the docking state more stably, thereby reducing the problem that the first joint and the second joint are prone to shaking under external loads such as wind or water due to the absence of a fixing assembly, which may cause impurities such as external dust or seawater to enter the first device and / or the second device, resulting in contamination or corrosion of the first device and / or the second device. Furthermore, because the first restoring member can apply a first force toward the first valve seat to the first valve core, when the fastener is in the disconnected state or accidentally disconnected during docking, the first valve core and the first valve seat fit together and form a first sealing pair, thereby blocking the first valve chamber and reducing the problem of foreign matter such as dust or seawater entering the first device from the first valve chamber (the first valve chamber being blocked means that foreign matter cannot easily enter the first device from the first valve chamber); similarly, because the second restoring member can apply a second force toward the second valve seat to the second valve core, when the fastener is in the disconnected state, the second valve core and the second valve seat fit together and form a second sealing pair, thereby blocking the second valve chamber and reducing the problem of foreign matter such as dust or seawater entering the second device from the second valve chamber (the second valve chamber being blocked means that foreign matter cannot easily enter the second device from the second valve chamber); In summary, compared with the existing technology that does not adopt the fastener in the present invention, regardless of whether the fastener is in the docked state or the disconnected state, the present invention reduces the probability of external impurities such as dust or seawater entering the first device and the second device, reduces the contamination and corrosion of the first device and the second device, and reduces the maintenance cost of the first device and the second device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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. 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.

[0017] Figure 1 It is a structural diagram of the buckle device; Figure 2 is a structural schematic diagram of the second joint; Figure 3 is a cross-sectional view of the buckle; Figure 4 It is a partial cross-sectional view of the buckle; Figure 5 A partial cross-sectional view of the coupling between the fastener and the simulated tubing hanger; Figure 6 It is a structural diagram of the matching of the fastener and the simulated tubing hanger; Among them, 1. test disc; 2. bolt; 3. first nut; 4. second nut; 5. buckle; 6. support frame; 7. shockproof joint; 8. hydraulic pipeline; 9. first valve body; 10. first valve cavity; 11. first inlet and outlet; 12. second inlet and outlet; 13. first valve seat; 14. first valve core; 15. first reset member; 16. second valve body; 17. second valve cavity; 18. third inlet and outlet; 19. fourth inlet and outlet; 20. second valve seat; 21. second valve core; 22. second reset member; 23. First support seat; 24. First limiting ring; 25. First flow channel; 26. Second support seat; 27. Second limiting ring; 28. Second flow channel; 29. First guide ring; 30. First guide groove; 31. Second guide ring; 32. Second guide groove; 33. Third guide ring; 34. Fourth guide ring; 35. Fifth guide ring; 36. Fourth guide groove; 37. First seal; 38. Second seal; 39. Third seal; 40. Fourth seal; 41. Screw; 42. Simulated tubing hanger. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1 to 6 As shown, the present invention discloses a snap-fit device 5, which includes a first joint, a second joint and a fixing assembly. The first joint includes a first valve body 9, a first valve cavity 10 is provided in the first valve body 9, a first valve seat 13, a first valve core 14 and a first reset member 15 are provided in the first valve cavity 10, the first valve core 14 is slidably provided in the first valve cavity 10, and the two ends of the first reset member 15 are respectively against the first valve core 14 and the first valve body 9, and the first reset member 15 applies a first force to the first valve core 14 toward the first valve seat 13; the second joint includes a second valve body 16 A second valve cavity 17 is provided in the second valve body 16, and a second valve seat 20, a second valve core 21 and a second return member 22 are provided in the second valve cavity 17. The second valve core 21 is slidably provided in the second valve cavity 17, and the two ends of the second return member 22 are respectively abutted against the second valve core 21 and the second valve body 16. The second return member 22 applies a second force on the second valve core 21 toward the second valve seat 20; wherein the first valve cavity 10 is used to communicate with the first device, and the second valve cavity 17 is used to communicate with the second device, and the first force and the second force are arranged opposite to each other and have the same magnitude; When the fastener 5 is in the docking state, under the external force (the external force can be specifically the force applied by a mechanical device such as a manipulator or an operator to the first joint and / or the second joint), after the first valve core 14 moves a preset distance in the direction of approaching the second valve core 21, the first valve core 14 first abuts against the second valve core 21, and then after the first valve core 14 continues to approach the second valve core 21, the first return member 15 and the second return member 22 are both compressed. Since the first force and the second force are equal, the first valve core 14 moves in the direction away from the first valve seat 13, and the second valve core 21 moves in the direction away from the second valve seat 20, so that the first device is connected to the second device through the first valve cavity 10 and the second valve cavity 17, and then the liquid can flow between the first device and the second device; Furthermore, the fastener 5 further includes a fixing assembly. When the fastener 5 is in the docking state, the fixing assembly is used to fix the first joint to the second device and / or fix the second joint to the first device. This improves the stability of the first joint and the second joint when docking, reduces the shaking of the first joint and / or the second joint, and enables the first joint and the second joint to maintain the docking state more stably. This reduces the problem that the first joint and the second joint are prone to shaking under external loads such as wind or water due to the lack of a fixing assembly, which causes impurities such as external dust or seawater to enter the first device and / or the second device, resulting in contamination or corrosion of the first device and / or the second device. Furthermore, because the first restoring member 15 can apply a first force toward the first valve seat 13 to the first valve core 14, when the fastener 5 is in the disconnected state or accidentally disconnected during docking, the first valve core 14 and the first valve seat 13 fit together and form a first sealing pair, which blocks the first valve chamber 10 and reduces the problem of foreign matter such as dust or seawater entering the first device from the first valve chamber 10 (the first valve chamber 10 being blocked means that foreign matter cannot easily enter the first device from the first valve chamber 10); similarly, because the second restoring member 22 can apply a second force toward the second valve seat 20 to the second valve core 21, when the fastener 5 is in the disconnected state, the second valve core 21 and the second valve seat 20 fit together and form a second sealing pair, which blocks the second valve chamber 17 and reduces the problem of foreign matter such as dust or seawater entering the second device from the second valve chamber 17 (the second valve chamber 17 being blocked means that foreign matter cannot easily enter the second device from the second valve chamber 17); In summary, compared with the existing technology that does not adopt the fastener 5 in the present invention, regardless of whether the fastener 5 is in the docked state or the disconnected state, the present invention reduces the probability of external impurities such as dust or seawater entering the first device and the second device, reduces the contamination and corrosion of the first device and the second device, and reduces the maintenance cost of the first device and the second device.

[0021] Because the first force and the second force are set relative to each other and are equal in magnitude, when the first valve core 14 and the second valve core 21 are against each other, the formation of the first sealing pair and the second sealing pair is maintained; but when the first valve core 14 and the second valve core 21 continue to move toward each other under the external force (for example, the second joint is fixed, and the external force causes the first valve core 14 to move toward the second valve core 21), the first valve core 14 and the second valve core 21 move away from each other until the first valve core 14 is separated from the first valve seat 13 and no longer abuts or fits with the first valve seat 13. At the same time, the second valve core 21 is separated from the second valve seat 20 and no longer abuts or fits with the second valve seat 20. At this time, the distance that the first valve core 14 moves toward the second valve core 21 is the preset distance.

[0022] When the first valve core 14 is located in the first valve cavity 10, that is, the first valve core 14 does not slide beyond the first valve body 9, and the second valve core 21 is located in the second valve cavity 17, that is, the second valve core 21 does not slide beyond the second valve body 16, at this time, the second end of the first connector and the first end of the second connector are sleeved together, which means that one end of the second end of the first connector and the first end of the second connector is a convex end and the other end is a concave end, and the two can form a concave-convex plug-in structure; Figure 1As shown, the second end of the first connector protrudes in the direction away from the first restoration member 15, the first end of the second connector is recessed in the direction close to the second restoration member 22, and the second end of the first connector cooperates with the first end of the second connector, so when the snapper is in the docking state, the second end of the first connector can be inserted into the first end of the second connector, and the distance the first connector is inserted into the first end of the second connector is not less than the preset distance; or, the first end of the second connector protrudes in the direction away from the second restoration member 22, and the second end of the first connector is recessed in the direction close to the first restoration member 15, when the snapper is in the docking state, the second end of the first connector can be inserted into the first end of the second connector, and the distance the first connector is inserted into the first end of the second connector is not less than the preset distance.

[0023] Alternatively, the above structure may not be adopted. When the snap-fit device is in the disconnected state, the end of the first valve core 14 away from the first reset member 15 is located outside the first valve body 9, and / or the end of the second valve core 21 away from the second reset member 22 is located outside the second valve body 16; when the snap-fit device is in the docking state, the second end of the first connector abuts against the first end of the second connector, the first valve core 14 and the second valve core 21 abut against each other, and the movement distance of the first valve core 14 in the direction close to the second valve core 21 is not less than the preset distance, so as to ensure that the first device can be connected to the second device through the first valve cavity 10, the second valve cavity 17.

[0024] like Figure 1 、 Figure 2 As shown, the first end of the first valve body 9 is provided with a first inlet and outlet connected to the first valve cavity 10 for connecting with the first device, and the second end of the first valve body 9 is provided with a second inlet and outlet connected to the first valve cavity 10; the first end of the second valve body 16 is provided with a third inlet and outlet connected to the second valve cavity 17, and the second end of the second valve body 16 is provided with a fourth inlet and outlet for connecting with the second device.

[0025] Among them, according to the working conditions, the fastener 5 in the present invention can be used in ground or underwater environments, and when the fastener 5 is used in different working conditions, the required material can be selected to ensure that the fastener 5 can be suitable for the corresponding working conditions. For example, when the fastener 5 is used to dock the first device and the second device in an underwater environment, the fastener 5 can be made of corrosion-resistant materials such as nickel-based alloys. When the coupler 5 is used to connect the first storage tank and the first pipeline on the ground, the first inlet and outlet 11 can be connected to the first pipeline, and the fourth inlet and outlet 19 can be connected to the first storage tank. When the first storage tank needs to be connected to the first pipeline, the coupler 5 is switched from the disconnected state to the docking state, so that the first pipeline passes through the first valve cavity 10 and the second valve cavity 17 can be connected to the first storage tank. At this time, the first device is the first pipeline and the second device is the first storage tank. Alternatively, the coupler 5 can also be used in an underwater environment. For example, when it is used to connect the tubing hanger and the hydraulic pipeline 8, the fourth inlet and outlet 19 is connected to the corresponding space in the tubing hanger, and the first inlet and outlet 11 is connected to the hydraulic pipeline 8. When the tubing hanger needs to be connected to the hydraulic pipeline 8, Switch the coupler 5 from the disconnected state to the docked state, so that the tubing hanger is connected through the second valve chamber 17, the first valve chamber 10 and the hydraulic pipeline 8, so as to perform a tubing hanger crossing test. For example, cleaning fluid can be input into the corresponding space in the tubing hanger through the hydraulic pipeline 8 for cleaning operations, or control fluid such as hydraulic oil can be input to control the corresponding equipment in the tubing hanger to perform related operations. At this time, the tubing hanger crossing test is called a tubing hanger hydraulic crossing test; alternatively, the cable can be sent into the tubing hanger through the first valve chamber 10 and the second valve chamber 17. At this time, the first device is the tubing hanger and the second device is the cable. The tubing hanger crossing test is called a tubing hanger cable crossing test.

[0026] The first inlet and outlet 11 and the second inlet and outlet 12 can be understood as the locations on the first valve body 9 where liquid enters and exits the first valve chamber 10, respectively. Similarly, the third inlet and outlet 18 and the fourth inlet and outlet 19 refer to the locations on the second valve body 16 where liquid enters and exits the second valve chamber 17, respectively. The first inlet and outlet 11, the second inlet and outlet 12, the third inlet and outlet 18, and the fourth inlet and outlet 19 mean that when liquid in the first device flows from the first valve chamber 10 and the second valve chamber 17 into the second device, the first inlet and outlet 11 and the third inlet and outlet 18 serve as inlets, while the second inlet and outlet 12 and the fourth inlet and outlet 19 serve as outlets. Conversely, when liquid in the second device flows from the second valve chamber 17 and the first valve chamber 10 into the first device, the first inlet and outlet 11 and the third inlet and outlet 18 serve as outlets, while the second inlet and outlet 12 and the fourth inlet and outlet 19 serve as inlets.

[0027] When the first valve body 9 and the second valve body 16 are cylindrical structures, the first valve cavity 10 is arranged along the axial direction of the first valve body 9, the first valve core 14 and the first valve cavity 10 slide together along the axial direction of the first valve body 9, the second valve cavity 17 is arranged along the axial direction of the second valve body 16, and the second valve core 21 and the second valve cavity 17 slide together along the axial direction of the second valve body 16; at this time, when the snap-fit device 5 is in the docking state, when the first force is equal to the second force, and the first valve core 14 and the second valve core 21 no longer move, the first inlet and outlet 11, the second inlet and outlet 12, the third inlet and outlet 18 and the fourth inlet and outlet 19 are arranged and connected in sequence from the first joint toward the second joint. Moreover, when the snap-fit device 5 is in the docking state, the first valve chamber 10 and the second valve chamber 17 are coaxially arranged, and the first valve core 14 and the second valve core 21 are coaxially arranged, which enables the first valve core 14 to offset the second valve core 21 and push each other under the first force or the second force, avoiding the problem that the first valve core 14 and the second valve core 21 cannot offset each other due to the non-coaxial arrangement of the first valve core 14 and the second valve core 21, and reducing the problem that the first valve core 14 is pushed crooked and stuck in the first valve chamber 10 by the second valve core 21 when the first valve core 14 pushes the second valve core 21 to move, or the second valve core 21 pushes the first valve core 14 to move, or the second valve core 21 is pushed crooked and stuck in the second valve chamber 17 when the first valve core 14 pushes the second valve core 21 to move.

[0028] Alternatively, when the first valve body 9 and the second valve body 16 are cylindrical structures, the first valve cavity 10 may not be arranged along the axial direction of the first valve body 9, and the second valve cavity 17 may not be arranged along the axial direction of the second valve body 16. Alternatively, the first valve body 9 and the second valve body 16 may be arranged in structures of other shapes, but it is necessary to ensure that: the first valve core 14 and the second valve core 21 can abut against each other, and the first valve core 14 can drive the second valve core 21 to move away from the second valve seat 20 under a first force, and the second valve core 21 can drive the first valve core 14 to move away from the first valve seat 13 under a second force. The first valve seat 13 can be the area of the first valve body 9 that is used to fit with the first valve core 14. Similarly, the second valve seat 20 can be the area of the second valve body 16 that is used to fit with the second valve core 21.

[0029] like Figure 1 As shown, the movement stroke of the first valve core 14 is located in the first valve cavity 10, that is, the first valve core 14 does not protrude from the first valve cavity 10, which reduces the problem that the first valve core 14 is stuck in the first valve cavity 10 and cannot move due to collision between external objects and the first valve core 14; and the movement stroke of the second valve core 21 is located in the second valve cavity 17, which makes the second valve core 21 not protrude from the second valve cavity 17, reducing the problem that the second valve core 21 is stuck in the first valve cavity 10 and cannot move due to collision between external objects and the second valve core 21.

[0030] like Figure 1 As shown, the first valve core 14 is provided with a first flow channel 25 in the area for fitting with the first valve seat 13, and the first inlet and outlet 11 are connected to the first flow channel 25. Thus, when the first valve core 14 is fitted with the first valve seat 13, the first valve seat 13 closes the first flow channel 25, so that the first inlet and outlet 11 cannot communicate with the second inlet and outlet 12 through the first flow channel 25. Similarly, the second valve core 21 is provided with a second flow channel 28 in the area for fitting with the second valve seat 20, and the fourth inlet and outlet 19 are connected to the second flow channel 28. When the second valve core 21 is fitted with the second valve seat 20, the second valve seat 20 closes the second flow channel 28, so that the third inlet and outlet 18 cannot communicate with the fourth inlet and outlet 19 through the second flow channel 28. Figure 1 As shown, the inclination angle of the inclined area on the first valve core 14 is greater than the inclination angle of the inclined area on the first valve seat 13. Compared with the manner in which the inclination angles of the first valve seat 13 and the first valve core 14 are the same, this reduces the contact area between the first valve seat 13 and the first valve core 14, increases the force applied by the first valve core 14 toward the first valve seat 13, so that the first valve core 14 can fit more closely on the first valve seat 13, thereby improving the sealing performance of the first sealing pair; similarly, the inclination angle of the inclined area on the second valve core 21 is greater than the inclination angle of the inclined area on the second valve seat 20, thereby improving the sealing performance of the second sealing pair.

[0031] One end of the first return member 15 can directly abut against the first valve body 9, or one end of the first return member 15 can abut against the first valve body 9 through a structure provided in the first valve chamber 10; similarly, one end of the second return member 22 can directly abut against the second valve body 16, or one end of the second return member 22 can abut against the second valve body 16 through a structure provided in the second valve chamber 17: Figure 1As shown, a first support seat 23 is provided in the first valve cavity 10, and the two ends of the first reset member 15 are respectively against the first support seat 23 and the first valve core 14, and the first support seat 23 provides a fulcrum for the first reset member 15 to ensure that the first reset member 15 can apply a first force toward the first valve seat 13 to the first valve core 14; the first support seat 23 is fixedly connected to the first valve body 9, such as welding or bolting, or the first support seat 23 is fixedly connected to the first valve body 9 through a first limiting ring 24, and the first limiting ring 24 is located on the side of the first support seat 23 away from the first reset member 15, and the first limiting ring 24 and the first valve body 9 can be fixedly connected by welding or bolting, and the first limiting ring 24 and the first support seat 23 are fixedly connected by welding or bolting. Similarly, a second support seat 26 is provided within the second valve chamber 17. The ends of the second reset member 22 abut against the second support seat 26 and the second valve core 21, respectively. The second support seat 26 provides a fulcrum for the second reset member 22, ensuring that the second reset member 22 can exert a second force on the second valve core 21 toward the second valve seat 20. The second support seat 26 is fixedly connected to the second valve body 16, such as by welding or bolting. Alternatively, the second support seat 26 is fixedly connected to the second valve body 16 via a second retaining ring 27. The second retaining ring 27 is located on the side of the second support seat 26 away from the second reset member 22. The second retaining ring 27 and the second valve body 16 can be fixedly connected by welding or bolting, and the second retaining ring 27 and the second support seat 26 can be fixedly connected by welding or bolting. The first reset member 15 and the second reset member 22 can be specifically springs or other structures capable of exerting the first and second forces, respectively.

[0032] like Figure 1 As shown, the snap-fit device 5 includes a guide assembly, which includes a first guide member and a second guide member. The first guide member includes the second end of the first valve body 9, and the second end of the first valve body 9 extends in a direction away from the first end of the first valve body 9 to form a first guide ring 29. The second guide member includes the first end of the second valve body 16, and the first end of the second valve body 16 is provided with a first guide groove 30 that cooperates with the first guide ring 29 toward the second end away from the second valve body 16. The first guide groove 30 is opened along the axial direction of the second valve body 16, which enables the first guide ring 29 to be inserted along the first guide groove 30 when the first joint and the second joint are docked, that is, the first guide ring 29 and the first guide groove 30 form a first guide pair to assist the docking of the first joint and the second joint, reducing the problem of the first valve core 14 and the second valve body 16 being abutted, or the second valve core 21 and the first valve body 9 being abutted due to the lack of the first guide ring 29 and the first guide groove 30.

[0033] Furthermore, if Figure 1As shown, the guide assembly also includes a third guide member and a fourth guide member. A second guide ring 31 extending axially along the first valve body 9 is provided on the outside of the first guide ring 29. A second guide groove 32 extending axially along the first valve cavity 10 is formed between the first guide ring 29 and the second guide ring 31. The second guide groove 32 is the third guide member. The fourth guide member includes a third guide ring 33 provided on the outside of the first guide groove 30 and extending axially along the second valve body 16. The second guide groove 32 and the third guide ring 33 can form a second guide pair, that is, when the first joint and the second joint are docked, in the process of the first guide ring 29 being inserted into the first guide groove 30 axially along the second valve body 16, the third guide ring 33 can also be inserted into the second guide groove 32 along the second guide groove 32, thereby improving the docking accuracy of the first valve core 14 and the second valve core 21.

[0034] like Figure 1 As shown, when connected to the second device through the second guide ring 31, the second guide ring 31 is also part of the fixed assembly. Specifically, the second guide ring 31 is fixed to the first valve body 9 by fasteners such as screws 41, and the end of the second guide ring 31 facing the second device can be threaded or bolted to the second device; and the inner diameter of the second guide ring 31 gradually decreases from the second device toward the first device, that is, the second guide ring 31 has a "trumpet-shaped" structure, which facilitates the docking of the first joint and the second joint.

[0035] like Figure 1 As shown, the guide assembly also includes a fifth guide member and a sixth guide member. The fifth guide member includes a fourth guide ring 34 provided on the first valve body 9, located between the first guide ring 29 and the second guide ring 31. The fourth guide ring 34 is provided with a third guide groove axially opened along the first valve body 9. The sixth guide member includes a fifth guide ring 35 provided on the second valve body 16, located between the first guide groove 30 and the third guide ring 33, and axially arranged along the second valve body 16. The fifth guide ring 35 is provided with a fourth guide groove 36 axially opened along the second valve body 16. When the first joint and the second joint are docked, the fourth guide ring 34 and the fifth guide ring 35 can form a third guide pair, so that the first guide During the process of the guide ring 29 being inserted into the first guide groove 30 along the axial direction of the second valve body 16 and the third guide ring 33 being inserted into the second guide groove 32 along the second guide groove 32, the fourth guide ring 34 is inserted into the fourth guide groove 36, and the fifth guide ring 35 is inserted into the third guide groove; in summary, through the above-mentioned multiple groups of guide structures, even if one group of guide pairs is damaged, such as broken, it can also be connected through the remaining groups of guide pairs. Compared with the method of not setting a guide pair or only setting a single group of guide pairs, this improves the accuracy of the connection between the first joint and the second joint, and reduces the problem of the first valve core 14 being stuck in the first valve cavity 10 and unable to move due to the misalignment of the first valve core 14 and the second valve core 21.

[0036] like Figure 1As shown, the snap-fit device 5 also includes a sealing assembly, which includes a first sealing unit disposed between the second valve body 16 and the fifth guide ring 35, and a second sealing unit disposed between the first guide ring 29 and the fifth guide ring 35. The first sealing unit and the second sealing unit each include a plurality of sealing structures such as sealing rings. The first sealing unit includes a first sealing member 37 and a second sealing member 38, which are arranged sequentially from the inside to the outside. The first sealing member 37 can be a metal sealing ring with a C-shaped cross-section, and the second sealing member 38 is a non-metallic sealing ring with an O-shaped cross-section. The second sealing unit includes a third sealing member 39 and a fourth sealing member 40, which are arranged sequentially from the inside to the outside. The third sealing member 39 is a third sealing ring with an M-shaped cross-section. Two fourth sealing members 40 are disposed in two grooves on the third sealing member 39. The fourth sealing members 40 can be sealing structures such as sealing rings. Alternatively, the present invention can also provide sealing rings between adjacent structures in the above-mentioned guide assembly to improve sealing performance.

[0037] Hydraulic crossing of a tubing hanger involves connecting the hydraulic line 8 to the tubing hanger so that the oil passage inside the tubing hanger can communicate with the oil outlet through the hydraulic line 8. Alternatively, by connecting the hydraulic line 8 to the tubing hanger, hydraulic oil can be injected into the corresponding equipment inside the tubing hanger to control the corresponding equipment to perform related actions. Alternatively, by connecting the hydraulic line 8 to the tubing hanger, cleaning agent can be injected into the tubing hanger through the hydraulic line 8 to clean the tubing hanger or the corresponding equipment inside the tubing hanger. Cable crossing of a tubing hanger involves feeding a cable into the corresponding position inside the tubing hanger and connecting it to the corresponding equipment.

[0038] The tubing hanger crossing test connects a simulated tubing hanger 42 to a simulated hydraulic line 8 via a simulated fastener 5, allowing for simulated experiments such as oil discharge, cleaning, oil injection, and cable insertion. Depending on the state of the first and second joints when they are docked, the test includes horizontal and vertical crossing. A horizontal crossing refers to the second joint extending horizontally (with the axial direction of the second valve body 16 aligned with the radial direction of the tubing hanger) and positioned on the tubing hanger, while the first and second joints are in a horizontal position when docked. A vertical crossing refers to the second joint being aligned parallel to the axial direction of the tubing hanger. When the first and second joints are docked, the first joint is aligned parallel to the axial direction of the tubing hanger.

[0039] In addition, the present invention also discloses a tubing hanger crossing test device. According to the working conditions, the tubing hanger crossing test device can perform a tubing hanger horizontal crossing test, a tubing hanger vertical crossing test, or a tubing hanger hydraulic crossing test, or a tubing hanger cable crossing test. The tubing hanger crossing test device includes a number of the above-mentioned snap fasteners 5 and a simulated tubing hanger 42. The simulated tubing hanger 42 is used as a first device or a second device. For example, when the simulated tubing hanger 42 is the second device, the second valve body 16 is fixed to the simulated tubing hanger 42 by welding or screw connection, and the fourth inlet and outlet 19 is connected to the corresponding space in the simulated tubing hanger 42. The first device is a hydraulic pipeline 8. The first valve body 9 is fixed to one end of the hydraulic pipeline 8. One end of the hydraulic pipeline 8 is connected to the first inlet and outlet 11. The other end of the hydraulic pipeline 8 is connected to a storage tank storing a liquid medium such as hydraulic oil or cleaning fluid, and a delivery pump is provided on the hydraulic pipeline 8. When tubing needs to be tested, During the hanger crossing test, the fastener 5 is switched from the disconnected state to the docked state, so that the corresponding space in the simulated oil tubing hanger 42 is connected to the hydraulic pipeline 8 through the second valve chamber 17 and the first valve chamber 10. This allows the delivery pump to input the hydraulic oil or cleaning fluid and other liquid media in the storage tank into the corresponding space in the simulated oil tubing hanger 42 through the first valve chamber 10 and the second valve chamber 17 to clean the corresponding equipment in the simulated oil tubing hanger 42 or control the operation of the corresponding equipment in the simulated oil tubing hanger 42; or, the cable is sent into the simulated oil tubing hanger 42 through the first valve chamber 10 and the second valve chamber 17 by mechanical equipment such as a manipulator or by the operator manually, and connected to the corresponding structure in the simulated oil tubing hanger 42.

[0040] When the fastener 5 is used in a tubing hanger crossing test device, the first joint, second joint, hydraulic line 8, and other structures are scaled down to the actual first joint, second joint, and hydraulic line 8 required in actual operating conditions. Therefore, they can also be referred to as simulated first joints, simulated second joints, and simulated hydraulic line 8. The differences between these structures and the actual tubing hanger, hydraulic line 8, first joint, and second joint are solely in weight and volume. For example, using simulated tubing hanger 42 as an example, simulated tubing hanger 42 is equivalent to a scaled-down version of the actual tubing hanger, with the same other parameters such as sealing and strength. Simulated tubing hanger 42 is lighter and smaller than the actual tubing hanger. For example, an actual tubing hanger weighs approximately 30 tons, while simulated tubing hanger 42 weighs several thousand kilograms or even less.

[0041] Because the simulated hanger, first joint, second joint, hydraulic line 8, and other structures are all scaled down from actual tubing hangers, operators can test the sealing properties of actual tubing hanger crossover tests by performing simulated experiments on the simulated structures. For example, a camera or visual observation can be used to determine whether the simulated tubing hanger 42 is leaking. Alternatively, multiple flow sensors and / or pressure sensors connected to the first valve chamber 10 and / or the second valve chamber 17 can be installed to determine whether the first joint or the second joint is leaking or clogged by measuring changes in the flow and / or pressure sensor values. Furthermore, because the structures are all scaled down from actual structures, the workload required for transporting and assembling the structures is reduced, making tubing hanger crossover tests more convenient.

[0042] like Figure 1 As shown, the present invention has several second joints fixed on the simulated oil tubing hanger 42, the fourth inlet and outlet 19 is connected to the simulated oil tubing hanger 42, and the test disk 1 is integrated with several first joints corresponding to the second joints. Multiple first joints and second joints are set to meet the needs of the oil tubing hanger crossing test; the first joint is integrated on the test disk 1, which makes the transportation of the first joint and the docking with the second joint more convenient, and the transportation and docking of multiple first joints and the docking of multiple snap connectors 5 can be realized by one transportation and docking; it should be noted that the distribution mode of the first joints on the test disk 1 needs to be the same as the distribution mode of the second joints on the oil tubing hanger, so that when the first valve core 14 of the first joint is aligned with the second valve core 21, the remaining first valve cores 14 are aligned with the corresponding second valve cores 21 at the same time.

[0043] The fixing assembly includes several first fixing members mounted on the test disc 1. During a tubing hanger penetration test, the required number of second connectors are first bolted or welded to the simulated tubing hanger 42. The fourth inlet / outlet 19 is connected to the corresponding space on the simulated tubing hanger 42. The required number of first connectors are then screwed or welded to the test disc 1. A first valve body 9 is inserted into the test disc 1, connecting one end of the hydraulic line 8 to the first inlet / outlet 11. The first inlet / outlet 11 is connected to the hydraulic line 8 via a vibration-proof joint (the vibration-proof joint 7 can be made of cast iron, and its specific structure is conventional, so it will not be described in detail). The test disc 1 is then secured to the second device via the first fixing members to prevent the first connector from falling off the simulated tubing hanger 42 when mated with the second connector. The first fixing members are arranged to avoid interference with the first connector, ensuring that the first connector and the first fixing members are positioned so that they do not interfere with each other's functions.

[0044] The first fixing member includes a first connecting section and a second connecting section that are connected to each other. The first connecting section is used to be fixedly connected to the test disk 1. When the buckle 5 is in the docking state, the second connecting section is located at the end of the first valve body 9 away from the test disk 1. The second connecting section is used to be connected to the simulated oil tubing hanger 42, and the movement stroke of the second connecting section toward the simulated oil tubing hanger 42 is not less than the distance between the first valve core 14 and the second valve core 21. Among them, the second connecting section is located at the end of the first valve body 9 away from the test disk 1, which means that compared with the first valve core 14, the second connecting section is closer to the simulated oil tubing hanger 42, and the first connecting section and the second connecting section are arranged parallel to the first valve body 9, which means that before the first valve core 14 and the second valve core 21 are abutted, the second connecting section can be pre-connected with the corresponding position on the simulated oil tubing hanger 42 through the second connecting section (pre-connection means that before the first valve core 14 and the second valve core 21 are abutted, the second connecting section is connected to the simulated oil tubing hanger 42 together). If it is found that the second connecting section is obstructed from moving toward the simulated oil tubing hanger 42, this means that the second connecting section may not be aligned with the corresponding position on the simulated oil tubing hanger 42, and the angle of the test disk 1 and the second connecting section needs to be adjusted until the second connecting section can move smoothly in the direction close to the simulated oil tubing hanger 42, which means that the first valve core 14 is also aligned with the second valve core 21.

[0045] The movement stroke of the second connecting section toward the simulated tubing hanger 42 is not less than the distance between the first valve core 14 and the second valve core 21. This means that at least before the second connecting section moves to the extreme position in the direction close to the tubing hanger, that is, before the second connecting section can no longer move toward the simulated tubing hanger 42, the first valve core 14 has already offset against the second valve core 21, thereby ensuring that the fastener 5 is smoothly switched to the docking state.

[0046] Among them, the first fixing member specifically includes a connecting rod, which includes a first connecting section and a second connecting section connected to each other. The first connecting section can be a bare rod and is bonded, welded or connected to the test disk 1 by screws. The second connecting section is a threaded section, and the area on the simulated oil tubing hanger 42 connected to the second connecting section is a threaded hole reserved on the simulated oil tubing hanger 42.

[0047] Alternatively, the first fixing member may not adopt the above structure, such as Figure 2 、 Figure 4As shown, the first fixing member includes a first nut 3, a bolt 2, and several second nuts 4. A first threaded hole for threaded connection with the first nut 3 is provided on the test disk 1. The first end of the first nut 3 is threadedly connected to the first threaded hole, and the diameter of the second end of the first nut 3 is larger than the diameter of the first threaded hole; at this time, the first connecting section is the area where the first nut 3 is connected to the first threaded hole, and the second connecting section is the area where the first end of the bolt 2 extends out of the first nut 3, and a threaded hole that can be threadedly connected to the first end of the bolt 2 is provided on the simulated oil pipe hanger 42. When the first fixing part needs to be assembled on the test disk 1, the first end of the first nut 3 is first threadedly connected to the first threaded hole and rotated through the first threaded hole until the second end of the first nut 3 abuts against the test disk 1, then a plurality of second nuts 4 are threadedly connected to the first end of the first nut 3, and the second nuts 4 are moved in the direction close to the test disk 1 until the second nut 4 closest to the test disk 1 abuts against the test disk 1, and the adjacent second nuts 4 abut against each other; then, the bolt 2 is inserted into the first nut 3, the bolt 2 is threadedly connected to the first nut 3, and the bolt 2 is rotated so that the first end of the bolt 2 passes through the first nut 3 and reaches a position closer to the simulated tubing hanger 42 than the first valve body 9, and the diameter of the second end of the bolt 2 is larger than the inner diameter of the first nut 3 to prevent the second end of the bolt 2 from rotating out of the first nut 3; then, the test disk 1 is moved in the direction close to the simulated tubing hanger 42 by a mechanical device such as a manipulator until the first end of the bolt 2 is aligned with the threaded hole on the simulated tubing hanger 42, and the first valve core 14 and the second valve core 21 are aligned.

[0048] Among them, the first end of the first nut 3 does not only refer to the end, but includes the end of the first end and the area close to the first end; similarly, the second end of the first nut includes the end of the second end and the area close to the second end; the first end of the bolt 2 includes the end of the first end and the area close to the first end; the second end of the bolt 2 includes the end of the second end and the area close to the second end.

[0049] Afterwards, the first end of the bolt 2 is fixed to the threaded hole reserved in the simulated tubing hanger 42, and then the first nut 3 is rotated in the first direction (the first direction is the direction in which the first nut 3 can move the test disc 1 toward the simulated tubing hanger 42, which can be a clockwise direction), driving the test disc 1 and the first valve core 14 to move toward the simulated tubing hanger 42 (because the first end of the bolt 2 is threadedly connected to the threaded hole at this time, and the second end of the first nut 3 forms a limit on the test disc 1, so the first nut 3 can be rotated to move toward the direction of the simulated tubing hanger 42, and can drive the test disc 1 to move in the same direction), until the first valve core 14 and the second valve core 21 are abutted, switching the buckle 5 from the disconnected state to the docking state; when the buckle 5 needs to be switched from the docking state to the disconnected state, the first nut 3 is rotated in the second direction, which is the opposite direction of the first direction (the second direction The direction may be counterclockwise), because at this time the first end of the bolt 2 is still threadedly connected to the threaded hole, so when the first nut 3 is rotated in the second direction, the first nut 3 will move in the direction away from the simulated tubing hanger 42, and the second nut 4 is connected to the first nut 3 and abuts against the test disc 1, so when the first nut 3 moves in the direction away from the simulated tubing hanger 42, the second nut 4 can exert a force on the test disc 1 in the direction away from the simulated tubing hanger 42, so that the test disc 1 and the first valve core 14 move in the direction away from the simulated tubing hanger 42, after the first valve core 14 is disengaged from the second valve core 21, the bolt 2 is rotated to disengage the bolt 2 from the threaded hole on the simulated tubing hanger 42, the first fixing member is disengaged from the simulated tubing hanger 42, and the buckle 5 is switched to the disconnected state; wherein, the first nut 3 is rotated by a manipulator or an operator using a hydraulic torque wrench.

[0050] The test disc 1 is connected to a support frame 6 by screws, bolts or welding. The support frame 6 can serve as a handle for fixing the test disc 1 on the simulated tubing hanger 42 and for removing the test disc 1 from the simulated tubing hanger 42, so that an operator or mechanical equipment such as a manipulator can disassemble and assemble the test disc 1 and the first joint. Figure 2 、 Figure 4 As shown, the cross section of the support frame 6 is n-shaped.

[0051] In this document, "several" refers to at least one. "And / or" refers to the textual content preceding and / or, and the textual content following and / or, which can exist simultaneously or separately. For example, "A and / or B" includes the presence of either A or B alone, as well as the presence of both A and B. This invention discloses multiple technical solutions, but does not provide any contradictory technical implications.

[0052] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A buckle device, characterized in that: The snap fastener includes a first joint, a second joint and a fixing assembly: The first joint includes a first valve body, a first valve cavity is provided in the first valve body, a first valve seat, a first valve core and a first return member are provided in the first valve cavity, the first valve core is slidably provided in the first valve cavity, two ends of the first return member are respectively abutted against the first valve core and the first valve body, and the first return member applies a first force to the first valve core toward the first valve seat; The second joint includes a second valve body, a second valve cavity is provided in the second valve body, a second valve seat, a second valve core and a second return member are provided in the second valve cavity, two ends of the second return member are respectively abutted against the second valve core and the second valve body, the second valve core is slidably provided in the second valve cavity, and the second return member applies a second force on the second valve core toward the second valve seat; Wherein, the first valve chamber is used to communicate with a first device, and the second valve chamber is used to communicate with a second device; the first acting force and the second acting force are arranged opposite to each other and are equal; When the snap-fit device is in a disconnected state, the first valve core and the first valve seat form a first sealing pair, and the second valve core and the second valve seat form a second sealing pair; When the snap-fit device is in a docking state, the first connector moves a preset distance toward the second connector under the action of external force, so that the first valve core and the second valve core offset each other, and the first device is connected to the second device through the first valve cavity, and the second valve cavity is connected to the second device; the fixing assembly is used to fix the first connector to the second device, and / or to fix the second connector to the first device.

2. The buckle according to claim 1, characterized in that: The first valve core is located in the first valve cavity, the second valve core is located in the second valve cavity, and when the snap-fit device is in the docking state, the second end of the first connector and the first end of the second connector are sleeved together; And / or, when the snap-fit device is in the docking state, the second end of the first connector and the first end of the second connector are abutted against each other; when the snap-fit device is in the disconnected state, the end of the first valve core away from the first reset member is located outside the second end of the first connector, and / or the end of the second valve core away from the second reset member is located outside the first end of the second connector.

3. The buckle according to claim 1, characterized in that: When the snap-fit device is in the docking state, the first valve cavity and the second valve cavity are coaxially arranged, and the first valve core and the second valve core are coaxially arranged.

4. The buckle according to claim 1, characterized in that: The snap-fit device includes a guide assembly, and the guide assembly includes a first guide member and a second guide member. The first guide member includes the second end of the first valve body, and the second end of the first valve body forms a first guide ring. The second guide member includes the first end of the second valve body, and the first end of the second valve body is provided with a first guide groove that can form a first guide pair with the first guide ring.

5. The buckle according to claim 4, characterized in that: The guide assembly also includes a third guide member and a fourth guide member. A second guide ring is provided on the outside of the first guide ring. The third guide member includes a second guide groove provided between the first guide ring and the second guide ring. The fourth guide member includes a third guide ring provided on the outside of the first guide groove. The second guide groove can form a second guide pair with the third guide ring.

6. The buckle according to claim 5, characterized in that: The guide assembly also includes a fifth guide member and a sixth guide member. The fifth guide member includes a fourth guide ring arranged between the first guide ring and the second guide ring. The sixth guide member includes a fifth guide ring arranged between the first guide groove and the third guide ring. The fourth guide ring and the fifth guide ring can form a third guide pair.

7. The buckle according to claim 6, characterized in that: The snap-fit device further includes a sealing assembly, which includes a first sealing unit arranged between the second valve body and the fifth guide ring, and a second sealing unit arranged between the first guide ring and the fifth guide ring.

8. A tubing hanger crossing test device, characterized in that: The tubing hanger crossing test device includes several fasteners according to any one of claims 1 to 7, and a simulated tubing hanger, and the simulated tubing hanger is the first device or the second device.

9. The tubing hanger crossing test device according to claim 8, characterized in that: The simulated tubing hanger is the second device, the second valve body is fixed on the simulated tubing hanger, and the first valve body is fixed on the test disc; The fixing assembly includes a first fixing member. When the fastener is in the docking state, the first fixing member is used to fix the test disc on the simulated oil pipe hanger.

10. The tubing hanger crossing test device according to claim 9, characterized in that: The first fixing member includes a first connecting section and a second connecting section that are connected to each other. The first connecting section is used to be fixedly connected to the test disk. When the fastener is in the docking state, the second connecting section is located at an end of the first valve body away from the test disk. The second connecting section is used to be connected to the simulated oil tubing hanger, and the movement stroke of the second connecting section toward the simulated oil tubing hanger is not less than the distance between the first valve core and the second valve core.

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