Leakage-proof high-pressure sealing device for gas production wellhead

Abstract

The utility model discloses an anti-leakage high-pressure sealing device for a gas production wellhead, and relates to the technical field of sealing equipment. The device comprises a Christmas tree, and the outer wall of the Christmas tree is fixedly connected with a plugging device through a flange plate; the plugging device is used for assisting the Christmas tree to plug a hole where oil does not need to enter and exit; the plugging device further comprises a sealing ring, the outer wall of the sealing ring is fixedly connected with an adjusting device, and the inner wall of the adjusting device is slidably connected with a supercharging device. The adjusting device comprises an internal thread disc, the inner wall of the internal thread disc is in threaded connection with a screw rod, one end of the screw rod is fixedly connected with a fixing block, the other end of the fixing block is rotatably connected with a rotating column, and the outer wall of the rotating column is slidably connected with a limiting frame. The diameter of the plugging device can be adjusted according to the diameter in the hole, so that the plugging device can adapt to different holes, and the purpose of improving the applicability of the device is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing equipment, in particular to a leakage-proof high-pressure sealing device for a gas production wellhead. Background Art

[0002] Sealing reliability is crucial during gas wellhead operations. Traditional sealing devices often have limitations, making them difficult to adapt to holes of varying diameters. They are also susceptible to shock and damage under high-pressure conditions, placing significant pressure on connecting components such as screws and nuts on flanges, compromising sealing effectiveness.

[0003] Its adjusting device cooperates with the boosting device and can flexibly adjust the diameter of the sealing device according to the diameter of the hole, which greatly enhances the adaptability of the device to different working conditions and can meet the sealing needs of various gas wellheads; at the same time, the boosting device and the adjusting device work together to increase friction by boosting the pressure, so that the sealing device remains stable, reducing the pressure on the screws and nuts on the flange, and can change the direction of part of the impact force, reducing the impact on the sealing device, effectively protecting the sealing device, thereby improving the sealing effect, ensuring the safe and efficient conduct of gas production operations, and preventing safety and environmental problems caused by gas leakage. Utility Model Content

[0004] In view of the deficiencies in the prior art, the technical solution adopted by the present invention to solve the technical problems thereof is: a high-pressure sealing device for preventing leakage at a gas wellhead, comprising: an oil tree, the outer wall of the oil tree being fixedly connected to a sealing device via a flange; a sealing device, the sealing device being used to assist the oil tree in sealing holes that are not required for oil in and out; the sealing device also comprises a sealing ring, the outer wall of the sealing ring being fixedly connected to an adjusting device, the inner wall of the adjusting device being slidably connected to a boosting device; the adjusting device comprises an internal threaded disk, the inner wall of the internal threaded disk being threadedly connected to a screw, one end of the screw being fixedly connected to a fixing block, the other end of the fixing block being rotatably connected to a rotating column, the outer wall of the rotating column being slidably connected to a limiting frame, and by arranging the adjusting device and the boosting device for use in conjunction, the diameter of the sealing device can be adjusted according to the diameter of the hole, so as to adapt to different holes and increase the applicability of the device.

[0005] Preferably, the outer wall of the internal threaded disk is fixedly connected to the outer wall of the flange, the outer wall of the limit frame is fixedly connected to the inner side wall of the sealing ring, and the outer side wall of the sealing ring is fixedly connected to the inner wall of the flange.

[0006] Preferably, the boosting device includes a cross-pushing block, the inner wall of the cross-pushing block is fixedly connected to a fixing rod, the outer wall of the cross-pushing block is fixedly connected to a compression spring, the end of the compression spring away from the cross-pushing block is fixedly connected to a pressure block, the outer wall of the pressure block is fixedly connected to an extension block, the inner wall of the extension block is rotatably connected to a first connecting rod, the end of the first connecting rod away from the extension block is rotatably connected to a friction strip, and the outer wall of the friction strip is rotatably connected to a second connecting rod.

[0007] Preferably, the end of the second connecting rod away from the friction strip is rotatably connected to the outer wall of the cross pushing block, the inner wall of the pressure block is slidably connected to the outer wall of the fixed rod, the outer wall of the cross pushing block and the outer wall of the pressure block are both slidably connected to the inner wall of the limit frame, the outer wall of the extension block is slidably connected to the outer wall of the limit frame, and the end of the cross pushing block away from the fixed rod is fixedly connected to the outer wall of the rotating column. By setting a boosting device and an adjusting device for use in conjunction, the friction is increased by boosting, making the sealing device difficult to move, thereby reducing the pressure on the screws and nuts on the flange, and at the same time changing the direction of part of the impact force, further reducing the impact on the sealing device, and enhancing the sealing effect by protecting the sealing device.

[0008] The beneficial effects of the utility model are as follows:

[0009] 1. The utility model provides an adjusting device and a boosting device for use in conjunction, and can adjust the diameter of the blocking device according to the diameter of the hole, so as to adapt to different holes and increase the applicability of the device.

[0010] 2. The utility model sets a boosting device and an adjusting device for use in conjunction, and increases friction by boosting the pressure, making it difficult for the sealing device to move, thereby reducing the pressure on the screws and nuts on the flange, and at the same time changing the direction of part of the impact force, further reducing the impact on the sealing device, and enhancing the sealing effect by protecting the sealing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the main view of the utility model;

[0012] Figure 2 It is a structural diagram of the plugging device of the utility model;

[0013] Figure 3 It is a cross-sectional view of the plugging device of the utility model;

[0014] Figure 4 It is a structural diagram of the regulating device of the utility model;

[0015] Figure 5 It is a structural schematic diagram of the boosting device of the utility model.

[0016] In the figure: 1. Christmas tree; 2. Sealing device; 21. Flange; 22. Sealing ring; 23. Adjusting device; 24. Pressurizing device; 231. Internally threaded disk; 232. Screw; 233. Fixed block; 234. Rotating column; 235. Limiting frame; 241. Cross push block; 242. Fixed rod; 243. Compression spring; 244. Pressure block; 245. Extension block; 246. First connecting rod; 247. Friction strip; 248. Second connecting rod. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

[0018] Example: See Figure 1 - Figure 5 The utility model provides a technical solution: a high-pressure sealing device for preventing leakage at a gas wellhead, comprising: a Christmas tree 1, the outer wall of the Christmas tree 1 is fixedly connected to a plugging device 2 through a flange 21; the plugging device 2 is used to assist the Christmas tree 1 in plugging holes that do not need to be used for oil in and out; the plugging device 2 also includes a sealing ring 22, the outer wall of the sealing ring 22 is fixedly connected to an adjusting device 23, and the inner wall of the adjusting device 23 is slidably connected to a pressurizing device 24; the adjusting device 23 includes an internal threaded disk 231, the inner wall of the internal threaded disk 231 is threadedly connected to a screw 232, one end of the screw 232 is fixedly connected to a fixing block 233, the other end of the fixing block 233 is rotatably connected to a rotating column 234, the outer wall of the rotating column 234 is slidably connected to a limiting frame 235, and before use , the screw 232 is rotated according to the diameter of the hole to be blocked. Since the internal threaded disk 231 is threadedly connected to the screw 232, the rotation of the screw 232 will move the fixed block 233 at one end thereof, and at the same time drive the rotating column 234 to slide inside the limit frame 235. Due to the presence of the compression spring 243, the pressure blocks 244 and the cross pushing block 241 at both ends of the compression spring 243 are pushed, wherein the pressure block 244 is pushed to the end of the limit frame 235 away from the sealing ring 22, and the cross pushing block 241 will be pushed close to the pressure block 244 and squeeze the compression spring 243. At this time, the second connecting rod 248 on the cross pushing block 241 will cooperate with the first connecting rod 246 to push the friction strip 247 outward, thereby realizing the diameter adjustment of the blocking device 2 in the hole.

[0019] The outer wall of the internal threaded disk 231 is fixedly connected to the outer wall of the flange 21 , the outer wall of the limiting frame 235 is fixedly connected to the inner side wall of the sealing ring 22 , and the outer side wall of the sealing ring 22 is fixedly connected to the inner wall of the flange 21 .

[0020] The boosting device 24 includes a cross-pushing block 241, the inner wall of the cross-pushing block 241 is fixedly connected to a fixed rod 242, the outer wall of the cross-pushing block 241 is fixedly connected to a compression spring 243, the end of the compression spring 243 away from the cross-pushing block 241 is fixedly connected to a pressure block 244, the outer wall of the pressure block 244 is fixedly connected to an extension block 245, the inner wall of the extension block 245 is rotatably connected to a first connecting rod 246, the end of the first connecting rod 246 away from the extension block 245 is rotatably connected to a friction strip 247, and the outer wall of the friction strip 247 is rotatably connected to a second connecting rod 248.

[0021] The end of the second connecting rod 248 away from the friction strip 247 is rotatably connected to the outer wall of the cross push block 241, the inner wall of the pressure block 244 is slidably connected to the outer wall of the fixed rod 242, the outer walls of the cross push block 241 and the pressure block 244 are both slidably connected to the inner wall of the limit frame 235, the outer wall of the extension block 245 is slidably connected to the outer wall of the limit frame 235, and the end of the cross push block 241 away from the fixed rod 242 is fixedly connected to the outer wall of the rotating column 234. When a high-pressure environment of the oil production tree 1 is generated, the pressure block 244 pushed by the high-pressure environment will move axially along the fixed rod 242. At the same time, the pressure block 244 slides in the limit frame 235. The compression spring 243 buffers the pressure and is compressed at the same time. The movement of the compressed block 244 will drive the extension block 245 to move. At this time, the friction strip 247 is also expanded outward through the first connecting rod 246 and the second connecting rod 248. Different from the adjustment process, the second connecting rod 248 is passively stressed at this time to cooperate with the first connecting rod 246 to push the friction strip 247 to move. At this time, the friction strip 247 will be supported on the inner wall of the hole, and the friction will be increased by increasing the pressure, making it difficult for the sealing device to move, thereby reducing the pressure on the screws and nuts on the flange 21, and at the same time changing the direction of part of the impact force, further reducing the impact on the sealing device.

[0022] Working principle:

[0023] When in use, during gas wellhead operations, the Christmas tree 1 is connected to the plugging device 2 via the flange 21. The plugging device 2 can effectively plug holes on the Christmas tree 1 that do not require oil inlet or outlet.

[0024] When the sealing device is in use, the adjusting device 23 and the boosting device 24 cooperate with each other to adjust the sealing state and reduce the stress on the bolts and nuts, so that the sealing device can function for a longer time. The adjusting device 23 can adjust the expansion size of the boosting device 24 before entering the hole, so as to adapt to pipes and holes of different diameters. Before use, the screw 232 is rotated according to the diameter of the hole to be blocked. Since the internal threaded disk 231 is threadedly connected to the screw 232, the rotation of the screw 232 will move the fixed block 233 at one end thereof, and at the same time drive the rotating column 234 to limit The position frame 235 slides inside. Due to the presence of the compression spring 243, the pressure blocks 244 and the cross push block 241 at both ends of the compression spring 243 are pushed. The pressure block 244 is pushed to the end of the position frame 235 away from the sealing ring 22. After being pushed, the cross push block 241 will approach the pressure block 244 and squeeze the compression spring 243. At this time, the second connecting rod 248 on the cross push block 241 will cooperate with the first connecting rod 246 to push the friction strip 247 outward, thereby realizing the diameter adjustment of the sealing device 2 in the hole, so as to adapt to different holes.

[0025] After the flange 21 is fixed, the booster device 24 will play a role in the leakage prevention process. When the high-pressure environment of the oil production tree 1 is generated, the pressure block 244 pushed by the high-pressure environment will move axially along the fixed rod 242. At the same time, the pressure block 244 slides in the limit frame 235. At this time, the compression spring 243 buffers the pressure and is compressed at the same time. The movement of the pressure block 244 will drive the extension block 245 to move. At this time, the friction strip 247 is also caused to expand outward through the first connecting rod 246 and the second connecting rod 248. The difference from the adjustment process is that the second connecting rod 246 at this time At 48, it is passively stressed to cooperate with the first connecting rod 246 to push the friction strip 247 to move. At this time, the friction strip 247 will be supported on the inner wall of the hole, and the friction will be increased by increasing the pressure, making it difficult for the sealing device to move, thereby reducing the pressure on the screws and nuts on the flange 21, and at the same time changing the direction of part of the impact force, further reducing the impact on the sealing device, and enhancing the sealing effect by protecting the sealing device, thereby effectively preventing leakage from the gas wellhead, ensuring the safety and stability of gas production operations under high-pressure environments, and reducing safety hazards and waste of resources caused by leakage.

[0026] 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 embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A gas wellhead anti-leakage high-pressure sealing device, characterized in that: include: A Christmas tree (1), wherein the outer wall of the Christmas tree (1) is fixedly connected to a plugging device (2) via a flange (21); A plugging device (2), the plugging device (2) is used to assist the Christmas tree (1) in plugging holes that are not necessary for oil inflow or outflow; The blocking device (2) further comprises a sealing ring (22), the outer wall of the sealing ring (22) being fixedly connected to an adjusting device (23), and the inner wall of the adjusting device (23) being slidably connected to a pressurizing device (24); The adjusting device (23) comprises an internally threaded disk (231), the inner wall of the internally threaded disk (231) being threadedly connected to a screw rod (232), one end of the screw rod (232) being fixedly connected to a fixed block (233), the other end of the fixed block (233) being rotatably connected to a rotating column (234), and the outer wall of the rotating column (234) being slidably connected to a limit frame (235).

2. A gas wellhead anti-leakage high-pressure sealing device according to claim 1, characterized in that: The outer wall of the internal threaded disk (231) is fixedly connected to the outer wall of the flange (21), the outer wall of the limit frame (235) is fixedly connected to the inner side wall of the sealing ring (22), and the outer side wall of the sealing ring (22) is fixedly connected to the inner wall of the flange (21).

3. A gas wellhead anti-leakage high-pressure sealing device according to claim 2, characterized in that: The boosting device (24) includes a cross push block (241), the inner wall of the cross push block (241) is fixedly connected to a fixed rod (242), the outer wall of the cross push block (241) is fixedly connected to a compression spring (243), the end of the compression spring (243) away from the cross push block (241) is fixedly connected to a pressure block (244), the outer wall of the pressure block (244) is fixedly connected to an extension block (245), the inner wall of the extension block (245) is rotatably connected to a first connecting rod (246), the end of the first connecting rod (246) away from the extension block (245) is rotatably connected to a friction strip (247), and the outer wall of the friction strip (247) is rotatably connected to a second connecting rod (248).

4. A gas wellhead anti-leakage high-pressure sealing device according to claim 3, characterized in that: One end of the second connecting rod (248) away from the friction strip (247) is rotatably connected to the outer wall of the cross push block (241), and the inner wall of the pressure block (244) is slidably connected to the outer wall of the fixed rod (242).

5. The gas wellhead anti-leakage high-pressure sealing device according to claim 3, characterized in that: The outer wall of the cross push block (241) and the outer wall of the pressure block (244) are both slidably connected to the inner wall of the limit frame (235), the outer wall of the extension block (245) is slidably connected to the outer wall of the limit frame (235), and the end of the cross push block (241) away from the fixed rod (242) is fixedly connected to the outer wall of the rotating column (234).

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