Efficient sealing structure for christmas tree

Abstract

The utility model provides an efficient sealing structure for a christmas tree, which comprises a christmas tree main pipeline, an upper connecting component, an outer sealing ring and an inner sealing ring, and the christmas tree main pipeline comprises a lower connecting flange positioned at the upper end. Compared with the prior art, the gas production tree main pipeline, the upper connecting assembly, the outer sealing ring and the inner sealing ring are additionally arranged, the outer sealing ring is embedded into the first outer sealing groove, and the inner sealing ring is embedded into the first inner sealing groove, so that the upper connecting flange and the lower connecting flange are fixed through bolts after being in butt joint; after the sealing performance of the inner sealing ring disappears, leaked gas is guided into the leaked gas cavity through the leakage groove and guided into the gas detector through the gas guide pipe, gas leakage can be found in time, the outer sealing ring conducts outer layer blocking to prevent gas from overflowing, and therefore the sealing performance of the gas production tree can be improved; the hydraulic telescopic rod drives the upper connecting assembly to move upwards so that the sealing ring can be replaced conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas production trees, and particularly relates to an efficient sealing structure for a gas production tree. Background Technique

[0002] A gas production tree is an important part of natural gas wellhead equipment, which is used to control and manage the natural gas extracted from underground reservoirs. It usually includes a series of valves, pipelines and other equipment, aiming to ensure the safe and efficient production and processing of natural gas. Sealing performance is an extremely important parameter in the use of gas production trees. The gas production tree exports the gas through the main pipeline and then transports and collects it outward. At the connection of the main pipeline, methods such as adding sealing rings and applying sealant are often used to strengthen the seal. However, some gases are highly corrosive, and after long-term use, their sealing performance will gradually decline until gas leakage occurs. For common gas production trees, their sealing performance is judged by regular inspections and other methods. However, the relevant sealing structures have uncertainties, and there may be situations such as premature leakage between the regular inspection periods, resulting in people not discovering the gas leakage situation in time, which may trigger corresponding safety accidents.

[0003] In summary, ensuring the sealing performance of the gas production tree is important, so it is hoped to propose a new structure to solve the above technical problems. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an efficient sealing structure for a gas production tree to solve the problems mentioned in the above background technique.

[0005] The utility model is realized through the following technical solutions: An efficient sealing structure for a gas production tree includes: a gas production tree main pipeline, an upper connection assembly, an outer sealing ring and an inner sealing ring. The gas production tree main pipeline includes a lower connection flange at the upper end, and a main pipeline body is fixedly connected below the lower connection flange. An upper connection assembly is arranged above the gas production tree main pipeline. The upper connection assembly includes an upper connection flange at the lower end of the middle position. An outer sealing groove two for improving sealing performance is opened on the periphery of the lower surface of the upper connection flange. An inner sealing groove two is opened on the inner side of the lower surface of the upper connection flange and inside the outer sealing groove two. An outer sealing ring is installed inside the outer sealing groove two, and an inner sealing ring is installed inside the inner sealing groove two. The upper connection assembly includes fixing columns extending into the ground and fixed at the lower ends on the left and right sides.

[0006] As a preferred implementation manner, an outer sealing groove one is opened on the periphery of the upper surface of the lower connection flange, and an inner sealing groove one is opened on the inner side of the upper surface of the lower connection flange and inside the outer sealing groove one. The lower end of the outer sealing ring is mutually fitted with the outer sealing groove one.

[0007] As a preferred embodiment, the lower end of the inner sealing ring is fitted with the first inner sealing groove. Both the outer sealing ring and the inner sealing ring are made of perfluoroether rubber material. A frustum-shaped groove is formed in the inner periphery of the upper surface of the lower connecting flange, and a frustum-shaped ring is fixedly connected to the inner periphery of the lower surface of the upper connecting flange. The frustum-shaped ring is fitted with the frustum-shaped groove. The outer sealing ring and the inner sealing ring are respectively embedded in the first outer sealing groove and the first inner sealing groove. When the upper connecting assembly is docked with the main gas production tree pipeline, the second outer sealing groove and the second inner sealing groove are respectively fitted with the upper ends of the outer sealing ring and the inner sealing ring, so as to form two sealing structures.

[0008] As a preferred embodiment, a leakage groove is formed above the second inner sealing groove, a leakage gas cavity is formed above the leakage groove, a gas guide pipe is arranged at the rear side of the leakage gas cavity, and a main gas production pipeline body is fixedly connected above the upper connecting flange.

[0009] As a preferred embodiment, a detector mounting bracket is installed on the outer side of the main gas production pipeline body, a gas detector for detecting leakage gas is installed at the rear side of the detector mounting bracket, the lower end of the gas detector is communicated with the upper end of the rear side of the gas guide pipe. When the inner sealing ring loses its sealing function, the leakage gas is introduced into the leakage gas cavity through the leakage groove, and is introduced into the inner side of the gas detector through the gas guide pipe for leakage detection.

[0010] As a preferred embodiment, a stable bottom plate for fitting with the ground is arranged above the fixed column, and a hydraulic expansion rod is fixedly connected to the inner side above the stable bottom plate.

[0011] As a preferred embodiment, a connecting seat is arranged above the hydraulic expansion rod, a support frame is arranged above the connecting seat, the support frame and the connecting seat are fixedly connected by bolts, and the support frame and the main gas production pipeline body are of an integral structure. The hydraulic expansion rod drives the upper connecting assembly to move upward, so as to facilitate the replacement of the sealing ring.

[0012] After adopting the above technical solution, the beneficial effects of the utility model are as follows: By adding the main gas production tree pipeline, the upper connecting assembly, the outer sealing ring and the inner sealing ring, embedding the outer sealing ring into the first outer sealing groove and the inner sealing ring into the first inner sealing groove, fixing the upper connecting flange and the lower connecting flange with bolts after docking, when the sealing performance of the inner sealing ring disappears, the leakage gas is introduced into the leakage gas cavity through the leakage groove and is introduced into the gas detector through the gas guide pipe, so as to timely detect gas leakage, and the outer sealing ring conducts outer layer blocking to prevent gas from overflowing, thereby improving the sealing performance of the gas production tree. By adding the main gas production tree pipeline, the hydraulic expansion rod drives the upper connecting assembly to move upward, so as to facilitate the replacement of the sealing ring. Description of the Drawings

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the attached drawings required for the description of the embodiments or the prior art. Obviously, the attached drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these attached drawings.

[0014] Figure 1 This is the overall structure schematic diagram of an efficient sealing structure for a gas production tree of the present invention.

[0015] Figure 2 This is the exploded structure schematic diagram of an efficient sealing structure for a gas production tree of the present invention.

[0016] Figure 3 This is the structure schematic diagram of the main pipeline of the gas production tree in an efficient sealing structure for a gas production tree of the present invention.

[0017] Figure 4 This is the upper side structure schematic diagram of the upper connection assembly in an efficient sealing structure for a gas production tree of the present invention.

[0018] Figure 5 This is the lower side structure schematic diagram of the upper connection assembly in an efficient sealing structure for a gas production tree of the present invention.

[0019] Figure 6 This is the partial sectional view schematic diagram of the upper connection assembly in an efficient sealing structure for a gas production tree of the present invention.

[0020] In the figure, 100 - main pipeline of the gas production tree, 101 - main pipeline body, 102 - lower connection flange, 103 - frustum groove, 104 - outer sealing groove I, 105 - inner sealing groove I;

[0021] 200 - upper connection assembly, 201 - upper connection flange, 202 - frustum ring, 203 - outer sealing groove II, 204 - inner sealing groove II, 205 - leakage groove, 206 - leakage gas cavity, 207 - air duct, 208 - detector mounting bracket, 209 - gas detector, 210 - support frame, 211 - connection seat, 212 - hydraulic telescopic rod, 213 - stable bottom plate, 214 - fixed column;

[0022] 300 - outer sealing ring;

[0023] 400 - inner sealing ring. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 to 6 , the present invention provides a technical solution: an efficient sealing structure for a gas production tree, including: a main gas production tree pipeline 100, an upper connection assembly 200, an outer sealing ring 300, and an inner sealing ring 400. The main gas production tree pipeline 100 includes a lower connection flange 102 at the upper end;

[0026] A main pipeline body 101 is fixedly connected below the lower connection flange 102. An upper connection assembly 200 is provided above the main gas production tree pipeline 100. The upper connection assembly 200 includes an upper connection flange 201 at the lower end of the middle position. An outer sealing groove two 203 for improving the sealing performance is provided on the periphery of the lower surface of the upper connection flange 201;

[0027] An inner sealing groove two 204 is provided on the inner side of the lower surface of the upper connection flange 201 and inside the outer sealing groove two 203. An outer sealing ring 300 is installed on the inner side of the outer sealing groove two 203, and an inner sealing ring 400 is installed on the inner side of the inner sealing groove two 204. The upper connection assembly 200 includes fixing columns 214 extending into the ground and fixed at the lower ends of the left and right sides.

[0028] An outer sealing groove one 104 is provided on the periphery of the upper surface of the lower connection flange 102. An inner sealing groove one 105 is provided on the inner side of the upper surface of the lower connection flange 102 and inside the outer sealing groove one 104. The lower end of the outer sealing ring 300 is mutually engaged with the outer sealing groove one 104.

[0029] The lower end of the inner sealing ring 400 is mutually engaged with the inner sealing groove one 105. Both the outer sealing ring 300 and the inner sealing ring 400 are made of perfluoroether rubber material. A conical groove 103 is provided on the inner periphery of the upper surface of the lower connection flange 102. A conical ring 202 is fixedly connected to the inner periphery of the lower surface of the upper connection flange 201. The conical ring 202 is mutually engaged with the conical groove 103. The outer sealing ring 300 and the inner sealing ring 400 are respectively embedded into the outer sealing groove one 104 and the inner sealing groove one 105. When the upper connection assembly 200 is butted with the main gas production tree pipeline 100, the outer sealing groove two 203 and the inner sealing groove two 204 are respectively engaged with the upper ends of the outer sealing ring 300 and the inner sealing ring 400, and two sealing structures can be formed.

[0030] Above the inner sealing groove two 204, a leakage groove 205 is provided. Above the leakage groove 205, a leakage gas cavity 206 is provided. At the rear side of the leakage gas cavity 206, an air guide pipe 207 is provided. Above the upper connecting flange 201, a gas collection pipeline body is fixedly connected.

[0031] An instrument detector mounting bracket 208 is installed on the outer side of the gas collection pipeline body. At the rear side of the instrument detector mounting bracket 208, a gas detector 209 for detecting leakage gas is installed. The lower end of the gas detector 209 communicates with the upper rear end of the air guide pipe 207. When the inner sealing ring 400 loses its sealing function, the leakage gas is introduced into the leakage gas cavity 206 through the leakage groove 205 and is introduced into the inner side of the gas detector 209 through the air guide pipe 207 for leakage detection.

[0032] Please refer to Figures 1 - 6 , as the first embodiment of the present utility model: First, the user embeds the outer sealing ring 300 and the inner sealing ring 400 into the outer sealing groove one 104 and the inner sealing groove one 105 respectively. When the upper connecting assembly 200 is docked with the main gas production tree pipeline 100, the outer sealing groove two 203 and the inner sealing groove two 204 are respectively fitted with the upper ends of the outer sealing ring 300 and the inner sealing ring 400, which can form two sealing structures. And the oblique abutting and embedding of the frustum ring 202 and the frustum groove 103 can improve the tightness after connection. Second, when the inner sealing ring 400 loses its sealing function, the leakage gas is introduced into the leakage gas cavity 206 through the leakage groove 205 and is introduced into the inner side of the gas detector 209 through the air guide pipe 207 for leakage detection. And the outer sealing ring 300 can block the leakage gas to prevent gas from overflowing, thereby improving the sealing performance of the gas production tree.

[0033] Above the fixed column 214, a stable bottom plate 213 for fitting with the ground is provided. Inside the upper part of the stable bottom plate 213, a hydraulic telescopic rod 212 is fixedly connected.

[0034] Above the hydraulic telescopic rod 212, a connecting seat 211 is provided. Above the connecting seat 211, a support frame 210 is provided. The support frame 210 and the connecting seat 211 are fixedly connected by bolts. The support frame 210 and the gas collection pipeline body are of an integral structure. The hydraulic telescopic rod 212 drives the upper connecting assembly 200 to move upward, thereby facilitating the replacement of the sealing ring.

[0035] Please refer to Figures 1 - 2 and Figures 4 - 6 , as the second embodiment of the present utility model: Based on the above first embodiment, when the gas detector 209 detects a leakage situation, the gas transmission is stopped. The upper connecting assembly 200 is fixed by extending the fixed columns 214 at both lower ends into the ground, and the stable bottom plate 213 is in contact with the ground to improve stability. The hydraulic telescopic rod 212 can drive the support frames 210 at both ends to move upward, so as to facilitate the replacement of the outer sealing ring 300 and the inner sealing ring 400.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An efficient sealing structure for a gas production tree, comprising: Gas production tree main pipeline (100), upper connection component (200), outer sealing ring (300) and inner sealing ring (400), characterized in that: the gas production tree main pipeline (100) includes a lower connection flange (102) located at the upper end; A main pipeline body (101) is fixedly connected below the lower connection flange (102). An upper connection component (200) is provided above the gas production tree main pipeline (100). The upper connection component (200) includes an upper connection flange (201) located at the lower end of the middle position. An outer sealing groove two (203) for improving the sealing performance is formed around the lower surface of the upper connection flange (201); An inner sealing groove two (204) is formed inside the lower surface of the upper connection flange (201) and inside the outer sealing groove two (203). The outer sealing ring (300) is installed inside the outer sealing groove two (203), and the inner sealing ring (400) is installed inside the inner sealing groove two (204). The upper connection component (200) includes fixed columns (214) extending into the ground and fixed at the lower ends of the left and right sides.

2. The high-efficiency sealing structure for a gas production tree according to claim 1, characterized in that: An outer sealing groove one (104) is formed around the upper surface of the lower connection flange (102). An inner sealing groove one (105) is formed inside the upper surface of the lower connection flange (102) and inside the outer sealing groove one (104). The lower end of the outer sealing ring (300) is fitted with the outer sealing groove one (104).

3. The high-efficiency sealing structure for a gas production tree according to claim 2, characterized in that: The lower end of the inner sealing ring (400) is fitted with the inner sealing groove one (105). Both the outer sealing ring (300) and the inner sealing ring (400) are made of perfluoroether rubber material. A conical groove (103) is formed around the inner periphery of the upper surface of the lower connection flange (102). A conical ring (202) is fixedly connected to the inner periphery of the lower surface of the upper connection flange (201). The conical ring (202) is fitted with the conical groove (103).

4. The high-efficiency sealing structure for a gas production tree according to claim 3, wherein: A leakage groove (205) is formed above the inner sealing groove two (204). A leakage gas cavity (206) is formed above the leakage groove (205). A gas guide pipe (207) is provided at the rear side of the leakage gas cavity (206). A gas production pipeline body is fixedly connected above the upper connection flange (201).

5. The high-efficiency sealing structure for a gas production tree according to claim 4, characterized in that: A detector mounting bracket (208) is installed outside the gas production pipeline body. A gas detector (209) for detecting leakage gas is installed at the rear side of the detector mounting bracket (208). The lower end of the gas detector (209) is communicated with the upper rear end of the gas guide pipe (207).

6. The high-efficiency sealing structure for a gas production tree according to claim 1, characterized in that: A stable bottom plate (213) for fitting with the ground is provided above the fixed column (214). A hydraulic telescopic rod (212) is fixedly connected to the inner side above the stable bottom plate (213).

7. The highly efficient sealing structure for a gas production tree according to claim 6, characterized in that: A connecting seat (211) is provided above the hydraulic telescopic rod (212). A support frame (210) is provided above the connecting seat (211). The support frame (210) and the connecting seat (211) are fixedly connected by bolts. The support frame (210) and the gas production pipeline body are of an integral structure.

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