All-metal sealing ultrahigh-pressure high-sulfur-resistance gas production wellhead device

Abstract

The invention discloses an all-metal sealing ultrahigh-pressure high-sulfur-resistance gas production well head device, and relates to the technical field of well head devices, the all-metal sealing ultrahigh-pressure high-sulfur-resistance gas production well head device comprises a Christmas tree installed at a well head, the Christmas tree is provided with a plurality of groups of pipelines and sealing valves, opening and closing of the pipelines are controlled in real time according to working conditions, and oil gas collection and conveying are completed; the Christmas tree is provided with a sealing assembly for sealing the connecting position of the pipeline, when the pipeline leaks in the working process, sealing grease is injected into the connecting position of the pipeline through the sealing assembly to complete sealing, an anti-blocking assembly for dredging the pipeline is further arranged in the Christmas tree, and a dredging column is detachably arranged on the anti-blocking assembly. According to the pipeline dredging device, the sealing performance and the pressure resistance in the working process are improved, and the leakage position is rapidly treated when a leakage accident occurs.

Description

Technical Field

[0001] The present invention relates to the technical field of wellhead devices, and in particular to an all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device. Background Art

[0002] The gas wellhead device is a collection of equipment installed at the wellhead of the gas well during the development of the natural gas field. It is mainly used to control, regulate and protect the production operation of the gas well. Its function is to ensure that the gas well can produce natural gas safely, stably and efficiently, and at the same time monitor and regulate the pressure, flow, temperature and other parameters in the production process. The gas wellhead device can control the pressure at the wellhead through valves, regulators and other equipment to ensure the smooth flow of natural gas in the well, and avoid the decline in production efficiency or equipment damage due to excessively high or low pressure.

[0003] The leak prevention and high pressure resistance functions of the gas tree are very critical. They not only ensure the safety of equipment and personnel, reduce the risk of environmental pollution, but also improve production efficiency and economic benefits. Leak prevention can avoid the loss of gas resources and accidents, and high pressure resistance ensures the reliable operation of equipment under extreme conditions and prevents serious accidents such as blowouts. The combination of the two ensures the safety, reliability and efficiency of the gas tree, which is the core guarantee in the natural gas extraction process.

[0004] A Chinese invention patent with announcement number CN113187425B discloses an ultra-high pressure, ultra-high temperature, high sulfur resistance HH-class gas production wellhead device. This device achieves the problems of high pressure resistance and corrosion resistance during the operation of the wellhead device through material selection. However, there is still a problem of insufficient sealing at the joints of each pipeline. When a leak occurs at the joint, this device cannot control the leak in time, which easily causes oil and gas leakage. Summary of the invention

[0005] In view of the above technical problems, the present invention discloses an all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: an all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device, including an oil production tree, the oil production tree includes a pipeline 1, a pipeline 4 is arranged on the pipeline 1, a pipeline 6 and an anti-blocking component are arranged on the pipeline 4, a sealing component is also arranged on the oil production tree, a support rod and an injection port are arranged on the pipeline 4, the sealing component includes a support frame installed on the pipeline 4, an injection box is slidably arranged on the support frame, the injection box is filled with sealing grease, and the injection box injects sealing grease into the injection port to improve the sealing between the pipeline 1 and the pipeline 4, the sealing component also includes a closing disk 1 installed at the connection between the pipeline 2 and the pipeline 4, two groups of clamping rings are slidably arranged in the closing disk 1, a closing disk 2 is arranged at a lower end of the closing disk, and the closing disk 2 injects sealing grease into the closing disk 1, the anti-blocking component includes a dredging pipe installed on the pipeline 2, a sliding block 2 is slidably arranged in the dredging pipe, and a dredging mechanism is detachably arranged on the sliding block 2.

[0007] Furthermore, multiple groups of pipes three are respectively arranged on both sides of pipe one, multiple groups of pipes five are respectively arranged on both sides of pipe two, pipe six is ​​arranged on the upper end of pipe two, and closing valves for controlling the opening and closing of pipes are arranged on pipe one, pipe two, pipe three, pipe four, pipe five, pipe six and the dredging pipe.

[0008] Furthermore, a baffle plate 2 is slidably provided on the support rod, a spring 4 is provided between the support rod and the baffle plate 2, the baffle plate 2 blocks the injection port, an inclined block is provided at the lower end of the baffle plate 2, and a push block is slidably provided on the injection box, and the push block pushes the baffle plate 2 to remove the blockage of the injection port when it moves.

[0009] Furthermore, a push frame is slidably arranged in the injection box, and multiple groups of sliding blocks are slidably arranged in the push frame. A connecting rod is rotatably arranged on the sliding block, and a stirring rod is rotatably arranged on the connecting rod.

[0010] Furthermore, the second closing disk is communicated with the first closing disk, a push plate is slidably arranged inside the second closing disk, and a spring three is arranged between the push plate and the second closing disk.

[0011] Furthermore, the clamping ring is provided with baffle plate 1, which blocks the passage between the closing disk 1 and the closing disk 2. When the two groups of clamping rings approach each other, baffle plate 1 releases the blockage of the passage between the closing disk 1 and the closing disk 2.

[0012] Furthermore, a spring 2 is arranged between the clamping ring and the closing disk 1, a limiting rod is arranged on the clamping ring, a limiting column is slidably arranged on the closing disk 1, and the limiting column is inserted into the limiting rod.

[0013] Furthermore, the dredging mechanism includes a dredging column, on which a rack is arranged, on which a plurality of dredging plates are rotatably arranged, a rotating ring is rotatably arranged inside the support ring, the rotating ring is connected to the dredging column through a spline shaft, a gear is rotatably arranged inside the rotating ring, and the gear is meshed with the rack.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the present invention improves the sealing effect of the pipeline connection by providing a sealing component, and automatically seals when a pipeline leaks, thereby reducing the risk of leakage to avoid accidents such as fire and explosion, while preventing natural gas leakage from polluting the surrounding environment. The sealing component responds quickly to effectively prevent natural gas from leaking into the environment, reduce the negative impact on the ecosystem, and minimize the loss of resources. The anti-blocking component provided in the present invention automatically clears the pipeline inside the oil production tree, effectively reducing the corrosion and wear of harmful substances (such as solid particles, acidic substances, etc.) in the oil flow on the oil production equipment, thereby extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a front view of the overall structure of the present invention.

[0017] Figure 3 for Figure 2 A cross-sectional view of the structure in the AA direction.

[0018] Figure 4 This is a schematic diagram of the structure of the Christmas tree of the present invention.

[0019] Figure 5 It is a schematic diagram of the structure of the sealing component of the present invention.

[0020] Figure 6 It is a right view of the sealing component structure of the present invention.

[0021] Figure 7 for Figure 6 A cross-sectional view of the structure in the BB direction.

[0022] Figure 8 It is a partial structural cross-sectional view of the sealing component of the present invention.

[0023] Fig. 9 It is a schematic diagram of the local structure of the sealing component of the present invention.

[0024] Fig.10 It is a schematic diagram of the structure of the push frame of the present invention.

[0025] Fig.11This is a schematic diagram of the installation position of the anti-blocking component of the present invention.

[0026] Fig.12 This is a front view of the anti-blocking component structure of the present invention.

[0027] Fig.13 for Fig.12 A cross-sectional view of the structure in CC direction.

[0028] Figure numerals: 1- Christmas tree; 2- sealing assembly; 3- anti-blocking assembly; 101- pipeline one; 102- pipeline two; 103- pipeline three; 104- pipeline four; 105- pipeline five; 106- pipeline six; 107- closing port; 108- closing valve; 109- injection port; 110- support rod; 201- support frame; 202- injection box; 203- spring one; 204- closing disk one; 205- clamping ring; 206- spring two; 207- closing Disk 2; 208-push plate; 209-spring 3; 210-limit rod; 211-limit column; 212-baffle 1; 213-baffle 2; 214-spring 4; 215-pushing block; 216-pushing frame; 217-sliding block 1; 218-connecting rod; 219-stirring stick; 301-dredging pipe; 302-sliding block 2; 303-support ring; 304-rotating ring; 305-dredging column; 306-rack; 307-dredging plate; 308-gear. DETAILED DESCRIPTION

[0029] refer to Figures 1 to 13 An all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device is shown, comprising a Christmas tree 1 for installation at an oil outlet, on which a plurality of groups of pipelines and closed valves 108 are arranged, and different pipelines are opened or closed according to different working states, and a sealing component 2 for sealing the pipeline connection is arranged on the Christmas tree 1, and when leakage occurs, the sealing component 2 quickly seals and protects the pipeline connection to avoid oil and gas leakage while improving the pressure resistance of the Christmas tree 1, and an anti-blocking component 3 for clearing the pipeline is arranged on the side of the Christmas tree 1, and the anti-blocking component 3 automatically clears the pipeline, and the present invention improves the pressure resistance and sealing effect of the Christmas tree, and at the same time improves the safety of the device.

[0030] The Christmas tree 1 includes a pipeline 101 installed at a wellhead, two groups of pipelines 103 are respectively arranged on both sides of the pipeline 101, and the pipelines 103 are all provided with closed valves 108. A pipeline 104 is arranged on the upper end of the pipeline 101, and the closed valve 108 is arranged on the pipeline 104. A pipeline 102 is arranged on the upper end of the pipeline 104, and a pipeline 106 is arranged on the upper end of the pipeline 102, and the closed valve 108 is rotatably arranged on the pipeline 106. Two groups of pipelines 105 are respectively arranged on both sides of the pipeline 102, and the closed valve 108 is rotatably arranged in the pipeline 105. A dredging pipe 301 is arranged on the side of the pipeline 102, and the closed valve 108 is arranged on the dredging pipe 301. A closed port 107 is arranged on the top of the pipeline 106, and an injection port 109 and a support rod 110 are arranged on the pipeline 104.

[0031] The sealing assembly 2 includes a support frame 201 installed on the pipe four 104, an injection box 202 is slidably arranged on the support frame 201, a spring 203 is arranged between the injection box 202 and the support frame 201, the support frame 201 and the injection box 202 are fixed by an electromagnet block, a baffle 213 is slidably arranged on the support rod 110, a spring 4 214 is arranged between the baffle 213 and the support rod 110, an inclined block is arranged at the lower end of the baffle 213, the injection box 202 is filled with sealing grease, and the injection box 202 is inserted into the injection port 109 and then filled with sealing grease at the connection between the pipe one 101 and the pipe four 104, and a push block 215 is slidably arranged on the injection box 202, and the push block 215 fits with the inclined block at the lower end of the baffle 213. 5. The pair of spring four 214 slides on the support rod 110, and the spring four 214 releases the blockage of the injection port 109. At this time, the injection box 202 is inserted into the injection port 109. When there is a problem with the sealing at the connection between the pipeline 101 and the pipeline four 104, the electromagnet block on the support frame 201 is closed. At this time, the injection box 202 slides on the support frame 201 through the deformation recovery force of the spring one 203. The injection box 202 drives the push block 215 to quickly approach the baffle two 213, and the push block 215 pushes up the baffle two 213. At this time, the spring four 214 is compressed. At this time, the push block 215 fits with the pipeline four 104 and cannot move. The injection box 202 continues to move on the push block 215, and the injection box 202 is inserted into the injection port 109, driving the push frame 21 6 slides in the injection box 202, and at the same time drives multiple groups of sliding blocks 1 217 to move, the sliding block 1 217 drives the connecting rod 218 to rotate, the connecting rod 218 drives the stirring rod 219 to extend, drives the stirring rod 219 to rotate, and the stirring rod 219 stirs the sealing grease in the injection box 202, and at the same time pushes the frame 216 to push the sealing grease in the injection box 202 into the connection between the pipe 1 101 and the pipe 4 104, so as to complete the sealing of the pipe 1 101 and the pipe 4 104. The sealing assembly 2 also includes a closing disk 1 204 installed at the connection between the pipe 2 102 and the pipe 4 104. Two groups of clamping rings 205 are slidably arranged in the closing disk 1 204. A spring 206 is arranged between the clamping ring 205 and the closing disk 1 204. A limit rod 210 is provided, and a limit column 211 is slidably provided on the closing disk 1 204. The limit column 211 is inserted into the limit rod 210 to limit the clamping ring 205. When the limit column 211 moves out of the limit rod 210, the clamping ring 205 moves through the deformation recovery force of the spring 206. The two groups of clamping rings 205 clamp the connection between the pipe 2 102 and the pipe 4 104. A baffle 1 212 is provided on the clamping ring 205. A closing disk 207 is provided at the lower end of the closing disk 1 204. A push plate 208 is slidably provided in the closing disk 207. A spring 3 209 is provided between the push plate 208 and the closing disk 207. The closing disk 207 and the push plate 208 are fixed by an electromagnet block. Sealing grease is placed in the closing disk 207.The second closed disk 207 is connected to the first closed disk 204, and the baffle plate 1 212 blocks the passage between the second closed disk 207 and the first closed disk 204. When the two sets of clamping rings 205 are close to each other, the baffle plate 1 212 opens the passage between the second closed disk 207 and the first closed disk 204, and at the same time closes the electromagnet block between the second closed disk 207 and the push plate 208. At this time, the push plate 208 is reset by the deformation recovery force of the spring three 209, and the push plate 208 transfers the sealing grease in the second closed disk 207 to the first closed disk 204, completing the sealing of the connection between the second pipe 102 and the fourth pipe 104.

[0032] The anti-blocking component 3 includes a dredging pipe 301 installed on the side of the second pipe 102, a sliding block 302 is slidably arranged in the dredging pipe 301, a supporting ring 303 is arranged on the sliding block 302, a rotating ring 304 is coaxially rotatably arranged on the supporting ring 303, a dredging column 305 is detachably arranged on the rotating ring 304, the dredging column 305 is connected to the rotating ring 304 through a spline shaft, a rack 306 is arranged on the dredging column 305, a plurality of dredging plates 307 are rotatably arranged on the dredging column 305, a gear 308 is rotatably arranged in the rotating ring 304, the gear 308 is meshed with the rack 306, when it is necessary to dredge the fourth pipe 104, the closed valve 108 on the dredging pipe 301 is opened, and the driving The movable sliding block 302 moves, and the sliding block 302 drives the support ring 303 to align with the pipeline 6 106. After opening the closed port 107, the dredging column 305 is placed on the rotating ring 304. When the dredging column 305 drives the rack 306 to engage with the gear 308, the gear 308 is driven to rotate, and the gear 308 drives the rack 306 to move. The rack 306 drives the dredging column 305 to slide on the rotating ring 304, and drives the dredging plate 307 to rotate. The dredging plate 307 is unfolded to have the same diameter as the inner wall of the pipeline 4 104, and drives the rotating ring 304 to rotate on the support ring 303. The rotating ring 304 drives the dredging column 305 and multiple groups of dredging plates 307 to rotate, thereby completing the dredging of the inside of the pipeline 4 104.

[0033] Working principle: When working, the Christmas tree 1 is installed at the wellhead, and the closing status of each pipeline is controlled according to the working situation. When there is a problem with the sealing of the connection between the pipeline 101 and the pipeline 4 104, the electromagnet block between the support frame 201 and the injection box 202 is closed, and the spring 1 203 is in a compressed state in the initial state. At this time, the injection box 202 slides on the support frame 201 through the deformation recovery force of the spring 1 203, and the injection box 202 drives the push block 215 to approach the baffle 213, and the push block 215 pushes the baffle 213, and the baffle 213 slides on the support rod 110. At this time, the spring 4 214 is compressed, and the baffle 213 releases the blockage of the injection port 109, and the injection box 202 continues to move and is inserted into the injection port 109, completing the docking of the injection box 202 and the injection port 109, and then multiple groups of driving sliding blocks 1 217 are pushed on the push frame 216 The sliding block 217 drives the connecting rod 218 to rotate, and the connecting rod 218 drives the stirring rod 219 to move out from the pushing frame 216. The stirring rod 219 contacts the sealing grease in the injection box 202, drives the stirring rod 219 to rotate, and stirs the sealing grease in the injection box 202. At the same time, the pushing frame 216 is driven to slide in the injection box 202. The pushing frame 216 transports the sealing grease in the injection box 202 through the injection port 109 to the pipe 1 101 and the pipe 4 104, and completes the sealing of the connection between the pipe 1 101 and the pipe 4 104. When the sealing grease in the injection box 202 is transported, the injection box 202 is driven to reset. At this time, the baffle plate 213 is reset by the deformation restoring force of the spring four 214, and the baffle plate 213 re-seals the injection port 109 to prevent the sealing grease at the connection between the pipe 101 and the pipe 4 104 from flowing out.

[0034] When the seal at the connection between the fourth pipe 104 and the second pipe 102 is abnormal, the limit column 211 is driven to slide on the closing disk 1 204, and the limit column 211 is pulled out from the limit rod 210. At this time, the fixation of the limit column 211 to the clamping ring 205 is released. At this time, the clamping ring 205 slides on the closing disk 1 204 through the deformation recovery force of the second spring 206. The two groups of clamping rings 205 approach each other and the connection between the fourth pipe 104 and the second pipe 102 is improved. The clamping ring 205 drives the baffle 212 to move, and the baffle 212 opens the channel between the closing disk 1 204 and the closing disk 207, closes the electromagnet block between the push plate 208 and the closing disk 207, and the push plate 208 is reset by the deformation restoring force of the spring three 209. The push plate 208 pushes the sealing grease in the closing disk 207 into the closing disk 1 204, completing the sealing between the pipe 2 102 and the pipe 4 104.

[0035] When pipe four 104 is blocked and needs to be dredged, the closed valve 108 on the dredging pipe 301 is opened, and the sliding block 2 302 is driven to move. The sliding block 2 302 drives the support ring 303 to align with the pipe six 106. After opening the closed port 107, the dredging column 305 is placed on the rotating ring 304. When the dredging column 305 drives the rack 306 to engage with the gear 308, the gear 308 is driven to rotate, and the gear 308 drives the rack 306 to move. The rack 306 drives the dredging column 305 to slide on the rotating ring 304, and drives the dredging plate 307 to rotate. The dredging plate 307 is unfolded to have the same diameter as the inner wall of the pipe four 104, and the rotating ring 304 is driven to rotate on the support ring 303. The rotating ring 304 drives the dredging column 305 and multiple groups of dredging plates 307 to rotate, thereby completing the dredging of the inside of the pipe four 104.

Claims

1. An all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device, comprising a Christmas tree (1), characterized in that: The Christmas tree (1) comprises a pipe one (101), a pipe four (104) is arranged on the pipe one (101), a pipe six (106) and an anti-blocking component (3) are arranged on the pipe four (104), a sealing component (2) is further arranged on the Christmas tree (1), a support rod (110) and an injection port (109) are arranged on the pipe four (104), the sealing component (2) comprises a support frame (201) mounted on the pipe four (104), an injection box (202) is slidably arranged on the support frame (201), the injection box (202) is filled with sealing grease, and the injection box (202) injects the sealing grease into the injection port (109) to increase the sealing capacity of the pipe one The sealing between pipeline 2 (101) and pipeline 4 (104), the sealing component (2) further comprises a closing disk 1 (204) installed at the connection between pipeline 2 (102) and pipeline 4 (104), two sets of clamping rings (205) are slidably arranged in the closing disk 1 (204), a closing disk 2 (207) is arranged at the lower end of the closing disk 1 (204), and sealing grease is injected into the closing disk 1 (204) by the closing disk 2 (207), and the anti-blocking component (3) comprises a clearing pipe (301) installed on pipeline 2 (102), a sliding block 2 (302) is slidably arranged in the clearing pipe (301), and a clearing mechanism is detachably arranged on the sliding block 2 (302).

2. The all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device according to claim 1, characterized in that: Multiple groups of pipelines three (103) are respectively arranged on both sides of the pipeline one (101), multiple groups of pipelines five (105) are respectively arranged on both sides of the pipeline two (102), a pipeline six (106) is arranged on the upper end of the pipeline two (102), and the pipeline one (101), pipeline two (102), pipeline three (103), pipeline four (104), pipeline five (105), pipeline six (106), and the dredging pipe (301) are all provided with a closing valve (108) for controlling the opening and closing of the pipelines.

3. The all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device according to claim 1, characterized in that: A baffle plate 2 (213) is slidably provided on the support rod (110), a spring 4 (214) is provided between the support rod (110) and the baffle plate 2 (213), the baffle plate 2 (213) blocks the injection port (109), an inclined block is provided at the lower end of the baffle plate 2 (213), and a push block (215) is slidably provided on the injection box (202), and the push block (215) pushes the baffle plate 2 (213) to remove the blockage of the injection port (109) when it moves.

4. The all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device according to claim 3, characterized in that: A push frame (216) is slidably disposed in the injection box (202), a plurality of sets of sliding blocks (217) are slidably disposed in the pushing frame (216), a connecting rod (218) is rotatably disposed on the sliding block (217), and a stirring rod (219) is rotatably disposed on the connecting rod (218).

5. The all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device according to claim 4, characterized in that: The second closing disk (207) is connected to the first closing disk (204), a push plate (208) is slidably arranged inside the second closing disk (207), and a spring (209) is arranged between the push plate (208) and the second closing disk (207).

6. The all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device according to claim 5, characterized in that: The clamping ring (205) is provided with a baffle plate 1 (212), which blocks the passage between the closing disk 1 (204) and the closing disk 2 (207). When the two sets of clamping rings (205) are close to each other, the baffle plate 1 (212) releases the blockage of the passage between the closing disk 1 (204) and the closing disk 2 (207).

7. The all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device according to claim 6, characterized in that: A second spring (206) is provided between the clamping ring (205) and the first closing disk (204), a limiting rod (210) is provided on the clamping ring (205), a limiting column (211) is slidably provided on the first closing disk (204), and the limiting column (211) is inserted into the limiting rod (210).

8. The all-metal sealed ultra-high pressure and high sulfur resistance gas production wellhead device according to claim 1, characterized in that: The dredging mechanism comprises a dredging column (305), a rack (306) is arranged on the dredging column (305), a plurality of dredging plates (307) are rotatably arranged on the dredging column (305), a rotating ring (304) is rotatably arranged inside the support ring (303), the rotating ring (304) is connected to the dredging column (305) via a spline shaft, a gear (308) is rotatably arranged inside the rotating ring (304), and the gear (308) is meshed with the rack (306).

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