Well killing manifold sealing device under high-pressure environment

Abstract

The utility model discloses a well killing manifold sealing device under a high-pressure environment, which belongs to the technical field of well killing manifold connection and sealing, and adopts the technical scheme that the well killing manifold sealing device comprises a first pipeline body and a second pipeline body, the surface of the first pipeline body is fixedly connected with a first flange, and the surface of the second pipeline body is fixedly connected with a second flange; a second flange is fixedly connected to the surface of the second pipeline body, a sealing mechanism is arranged between the opposite sides of the first pipeline body and the second pipeline body, and a connection protection mechanism is arranged on the surface of the first flange. The sealing mechanism comprises two fixing rings, a first sealing gasket, a connecting pipe and two second sealing gaskets, the first sealing gasket is fixedly arranged on the surface of the connecting pipe in a sleeving mode, and the problems that in the prior art, only one sealing gasket is provided, double sealing between the first pipeline and the second pipeline is inconvenient, and the sealing effect is poor are solved. The problems that the joint of the first pipeline and the second pipeline cannot bear the high-pressure environment conveniently, and the flange cannot be protected conveniently are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of well-killing manifold connection and sealing, in particular to a well-killing manifold sealing device under high-pressure environment. Background Art

[0002] The well-killing manifold is an important component of the well control device. It is usually composed of a series of valves, pipes and sealing structures. These components are combined together through high-strength connections to form a pipeline system that can withstand high pressure.

[0003] The traditional choke and kill manifold connection device is not easy to install during use, which increases the difficulty of connecting the choke and kill manifolds to a certain extent and reduces the installation efficiency of the choke and kill manifolds.

[0004] The existing patent (Announcement No.: CN214787295U) is a throttling and well-killing manifold connection device that is easy to install. The utility model has a first reinforcing rib installed on the inner side of the flange. Under the joint action of the first and second reinforcing ribs, the internal strength of the flange can be enhanced to a certain extent, preventing the flange from breaking due to long-term pressure in the pipeline, thereby extending the service life of the flange.

[0005] In response to the above problems, the existing patent provides a solution. After the applicant reviewed the existing patent (Announcement No.: CN214787295U), the following problems were found: the existing technical solution only proposes one sealing gasket, which is not convenient for double sealing between the first pipe and the second pipe, and it is not convenient for the connection between the first pipe and the second pipe to withstand the high-pressure environment, and it is not convenient to protect the flange.

[0006] Therefore, a well-killing manifold sealing device under high-pressure environment is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide a well-killing manifold sealing device under high-pressure environment, which can solve the problems in the existing technical solution that only one sealing gasket is proposed, it is inconvenient to perform double sealing between the first pipe and the second pipe, it is inconvenient for the connection between the first pipe and the second pipe to withstand the high-pressure environment, and it is inconvenient to protect the flange.

[0008] To achieve the above objectives, the present invention provides the following technical solutions: a well-killing manifold sealing device for use in a high-pressure environment, comprising a first pipe body and a second pipe body, a first flange being fixedly connected to a surface of the first pipe body, a second flange being fixedly connected to a surface of the second pipe body, a sealing mechanism being provided between opposing sides of the first pipe body and the second pipe body, and a connection protection mechanism being provided on a surface of the first flange;

[0009] The sealing mechanism includes two fixing rings, a first sealing gasket, a connecting pipe and two second sealing gaskets. The first sealing gasket is fixedly sleeved on the surface of the connecting pipe, the second sealing gasket is fixedly connected to the connecting pipe on the side close to the connecting pipe, the surface of the rear fixing ring is fixedly connected to the inner wall of the first pipe body, the surface of the front fixing ring is fixedly connected to the inner wall of the second pipe body, the surfaces of the first flange and the second flange are both in contact with the surface of the first sealing gasket, the rear side of the rear second sealing gasket is in contact with the front side of the rear fixing ring, and the front side of the front second sealing gasket is in contact with the rear side of the front fixing ring.

[0010] Preferably, the connection protection mechanism includes two arc-shaped connection covers, two first fixed blocks, two connection columns and two second fixed blocks, the surfaces of the first flange and the second flange are in contact with the inner wall of the arc-shaped connection cover, the side of the first fixed block close to the top arc-shaped connection cover is fixedly connected to the top arc-shaped connection cover, the side of the second fixed block close to the bottom arc-shaped connection cover is fixedly connected to the bottom arc-shaped connection cover, and the bottom of the connection column is fixedly connected to the top of the second fixed block.

[0011] Preferably, the top of the connecting column passes through the first fixed block and extends to the top of the first fixed block. A limiting barrel is provided on the top of the connecting column. The limiting barrel is threadedly connected to the surface of the connecting column, and the bottom of the limiting barrel contacts the top of the first fixed block.

[0012] Preferably, a screwing post is fixedly connected to the top of the limiting barrel, and the number of the screwing posts is several and evenly distributed on the surface of the limiting barrel.

[0013] Preferably, a chamfer is provided on the surface of the arc-shaped connecting cover, and a pull ring is fixedly connected to the front and rear sides of the arc-shaped connecting cover.

[0014] Preferably, a pad is fixedly connected to the surface of the arc-shaped connection cover.

[0015] Preferably, a chamfer is provided on a side of the inner wall of the fixing ring away from the second sealing gasket, and the fixing ring is made of wear-resistant metal.

[0016] Preferably, a reinforcing steel ring is provided inside the first sealing gasket, and the reinforcing steel ring and the first sealing gasket are integrally formed.

[0017] Preferably, the arc-shaped connecting cover, the first fixing block, the second fixing block and the connecting column are all made of high-strength rust-proof metal.

[0018] Preferably, the first sealing gasket and the second sealing gasket are both made of polytetrafluoroethylene.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In the present application, when the first pipe body and the second pipe body are connected, the surfaces of the first flange and the second flange contact the first sealing gasket, thereby performing a primary sealing function. Simultaneously, the rear second sealing gasket contacts the rear fixing ring, and the front second sealing gasket contacts the front fixing ring, thereby forming a secondary seal at the connection between the connecting pipe and the inner wall of the pipe. This double seal ensures that the pipe connection will not leak under high-pressure environments, thereby avoiding the problem that the prior art solution only provides one sealing gasket, which is inconvenient for double sealing between the first pipe and the second pipe, and makes it difficult for the connection between the first pipe and the second pipe to withstand high-pressure environments.

[0021] 2. The present application covers the flange part of the pipe connection with an arc-shaped connecting cover, and by providing a chamfer on the surface of the arc-shaped connecting cover, the arc-shaped connecting cover can be conveniently covered on the surface of the first flange and the second flange. At this time, by using an external tool to knock the gasket, the top and bottom arc-shaped connecting covers can be matched, and the first flange and the second flange can be connected and protected, thereby protecting them and preventing external factors from damaging the connection, thereby avoiding the problem that the existing technical solution is inconvenient to protect the flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the overall structural diagram of the well-killing manifold sealing device under high-pressure environment of the utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional connection between the first pipe body and the second pipe body in the present invention;

[0024] Figure 3 This is a perspective exploded schematic diagram of the first flange, the second flange and the first sealing gasket in the present invention;

[0025] Figure 4 This is a three-dimensional exploded schematic diagram of the top arc-shaped connecting cover and the bottom arc-shaped connecting cover in the present invention;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the fixing ring in the present utility model;

[0027] Figure 6 This is a cross-sectional view of the internal structure of the first sealing gasket in the present invention.

[0028] In the figure, 1. first pipe body; 2. connection protection mechanism; 201. arc-shaped connection cover; 202. first fixing block; 203. connecting column; 204. second fixing block; 3. second pipe body; 4. reinforcing steel ring; 5. first flange; 6. second flange; 7. sealing mechanism; 701. fixing ring; 702. first sealing gasket; 703. connecting pipe; 704. second sealing gasket; 8. gasket; 9. screw column; 10. limiting barrel; 11. pull ring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0030] See also Figure 1-6 , this utility model provides a technical solution:

[0031] A well-killing manifold sealing device for use in a high-pressure environment includes a first pipe body 1 and a second pipe body 3. A first flange 5 is fixedly connected to the surface of the first pipe body 1, and a second flange 6 is fixedly connected to the surface of the second pipe body 3. A sealing mechanism 7 is provided between opposing sides of the first pipe body 1 and the second pipe body 3. A connection protection mechanism 2 is provided on the surface of the first flange 5.

[0032] The sealing mechanism 7 includes two fixing rings 701, a first sealing gasket 702, a connecting pipe 703 and two second sealing gaskets 704. The first sealing gasket 702 is fixedly sleeved on the surface of the connecting pipe 703. The second sealing gasket 704 is fixedly connected to the connecting pipe 703 on the side close to the connecting pipe 703. The surface of the rear fixing ring 701 is fixedly connected to the inner wall of the first pipe body 1. The surface of the front fixing ring 701 is fixedly connected to the inner wall of the second pipe body 3. The surfaces of the first flange 5 and the second flange 6 are both in contact with the surface of the first sealing gasket 702. The rear side of the rear second sealing gasket 704 is in contact with the front side of the rear fixing ring 701. The front side of the front second sealing gasket 704 is in contact with the rear side of the front fixing ring 701.

[0033] In this embodiment: when the first pipe body 1 and the second pipe body 3 are connected, the surfaces of the first flange 5 and the second flange 6 are in contact with the first sealing gasket 702, which plays a first sealing role. At the same time, the rear second sealing gasket 704 is in contact with the rear fixing ring 701, and the front second sealing gasket 704 is in contact with the front fixing ring 701, forming a second seal at the connection between the connecting pipe 703 and the inner wall of the pipe. Through double sealing, it is ensured that the pipe connection will not leak in a high-pressure environment, avoiding the problem in the existing technical solution that only one sealing gasket is proposed, which is inconvenient to perform double sealing between the first pipe and the second pipe, and it is inconvenient for the connection between the first pipe and the second pipe to withstand the high-pressure environment.

[0034] Specifically, such as Figure 4As shown, the connection protection mechanism 2 includes two arc-shaped connection covers 201, two first fixed blocks 202, two connection columns 203 and two second fixed blocks 204. The surfaces of the first flange 5 and the second flange 6 are in contact with the inner wall of the arc-shaped connection cover 201. The side of the first fixed block 202 close to the top arc-shaped connection cover 201 is fixedly connected to the top arc-shaped connection cover 201, the side of the second fixed block 204 close to the bottom arc-shaped connection cover 201 is fixedly connected to the bottom arc-shaped connection cover 201, and the bottom of the connection column 203 is fixedly connected to the top of the second fixed block 204.

[0035] Specifically, such as Figure 4 As shown, the top of the connecting column 203 passes through the first fixed block 202 and extends to the top of the first fixed block 202. A limiting barrel 10 is provided on the top of the connecting column 203. The limiting barrel 10 is threadedly connected to the surface of the connecting column 203, and the bottom of the limiting barrel 10 contacts the top of the first fixed block 202.

[0036] Specifically, such as Figure 4 As shown, a screwing post 9 is fixedly connected to the top of the limiting barrel 10 , and the number of the screwing posts 9 is several and evenly distributed on the surface of the limiting barrel 10 .

[0037] In this embodiment: by covering the arc-shaped connecting cover 201 on the flange part of the pipe connection, and by opening a chamfer on the surface of the arc-shaped connecting cover 201, the arc-shaped connecting cover 201 can be conveniently covered on the surface of the first flange 5 and the second flange 6. At this time, by using an external tool to knock the gasket 8, the top and bottom arc-shaped connecting covers 201 can be matched, and the first flange 5 and the second flange 6 are connected and protected, which plays a protective role and prevents external factors from causing damage to the connection. The connecting column 203 and the limit barrel 10 fix the upper and lower arc-shaped connecting covers 201 together, thereby enhancing the stability and sealing of the connection and avoiding the problem that the existing technical solution is inconvenient to protect the flange.

[0038] Specifically, such as Figure 4 As shown, the surface of the arc-shaped connecting cover 201 is provided with chamfers, and the front and rear sides of the arc-shaped connecting cover 201 are fixedly connected to pull rings 11 .

[0039] Specifically, such as Figure 4 As shown, a cushion block 8 is fixedly connected to the surface of the arc-shaped connection cover 201 .

[0040] In this embodiment: by providing a chamfer on the surface of the arc-shaped connecting cover 201, the arc-shaped connecting cover 201 can be conveniently covered on the surface of the first flange 5 and the second flange 6. At this time, by using an external tool to knock the pad 8, the top and bottom arc-shaped connecting covers 201 are conveniently matched, so as to facilitate the connection and protection of the first flange 5 and the second flange 6.

[0041] Specifically, such as Figure 3 and Figure 5 As shown, a chamfer is formed on the inner wall of the fixing ring 701 away from the second sealing gasket 704 , and the fixing ring 701 is made of wear-resistant metal.

[0042] Specifically, such as Figure 3 and Figure 6 As shown, a reinforcing steel ring 4 is provided inside the first sealing gasket 702 , and the reinforcing steel ring 4 and the first sealing gasket 702 are integrally formed.

[0043] Specifically, such as Figure 4 As shown, the arc-shaped connecting cover 201, the first fixing block 202, the second fixing block 204 and the connecting column 203 are all made of high-strength rust-proof metal.

[0044] Specifically, such as Figure 3 As shown, the first sealing gasket 702 and the second sealing gasket 704 are both made of polytetrafluoroethylene.

[0045] In this embodiment: the fixing ring 701 is made of wear-resistant metal, and the inner wall is chamfered to facilitate the flow of liquid inside the first pipe body 1 and the second pipe body 3, and can remain stable under high-pressure conditions and is not easy to wear. The first sealing gasket 702 and the second sealing gasket 704 are made of polytetrafluoroethylene, which has the characteristics of strong chemical stability, low friction coefficient, high and low temperature resistance, etc., and can effectively seal under high-pressure conditions to prevent leakage. The reinforcing steel ring 4 is located inside the first sealing gasket 702 and is integrally formed, which enhances the strength and pressure resistance of the first sealing gasket 702. The arc-shaped connecting cover 201, the first fixing block 202, the second fixing block 204 and the connecting column 203 are all made of high-strength rust-proof metal, which can withstand pressure under high-pressure conditions, prevent rust, and extend service life.

[0046] Working principle: When the first pipe body 1 and the second pipe body 3 are connected, the surfaces of the first flange 5 and the second flange 6 are in contact with the first sealing gasket 702, which plays the role of the first seal. At the same time, the rear second sealing gasket 704 is in contact with the rear fixing ring 701, and the front second sealing gasket 704 is in contact with the front fixing ring 701, forming a second seal at the connection between the connecting pipe 703 and the inner wall of the pipe. Through double sealing, it is ensured that the pipe connection will not leak under high pressure environment. Then the arc-shaped connection cover 201 is covered on the flange part of the pipe connection. The surface of the arc-shaped connecting cover 201 is chamfered, so that the arc-shaped connecting cover 201 can be easily covered on the surface of the first flange 5 and the second flange 6. At this time, the pad 8 is knocked with an external tool to facilitate the top and bottom arc-shaped connecting covers 201 to match each other, so that the first flange 5 and the second flange 6 can be connected and protected, thereby protecting them and preventing external factors from damaging the connection. At this time, the first sealing gasket 702 will be in close contact with the first flange 5 and the second flange 6, and the second sealing gasket 704 will be in close contact with the fixing ring 701, and double sealing can be achieved. Tightly sealed, the connecting column 203 and the limiting barrel 10 fix the upper and lower arc-shaped connecting covers 201 together, enhancing the stability and sealing of the connection. When the connection protection mechanism 2 needs to be installed or removed, the limiting barrel 10 is screwed on the surface of the connecting column 203 by twisting the screw column 9 to achieve connection or separation. The chamfered surface of the arc-shaped connecting cover 201 and the pull ring 11 are convenient for operation. The fixing ring 701 is made of wear-resistant metal, and the inner wall is chamfered to facilitate the flow of liquid inside the first pipe body 1 and the second pipe body 3, and can remain stable under high pressure conditions and is not easy to Wear, the first sealing gasket 702 and the second sealing gasket 704 are made of polytetrafluoroethylene, which has the characteristics of strong chemical stability, low friction coefficient, high and low temperature resistance, etc., and can effectively seal in a high-pressure environment to prevent leakage. The reinforcing steel ring 4 is located inside the first sealing gasket 702 and is integrally formed, which enhances the strength and pressure resistance of the first sealing gasket 702. The arc-shaped connecting cover 201, the first fixing block 202, the second fixing block 204 and the connecting column 203 are all made of high-strength rust-proof metal, which can withstand pressure in a high-pressure environment, prevent rust, and extend service life.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A well-killing manifold sealing device under high-pressure environment, comprising a first pipe body (1) and a second pipe body (3), characterized in that: A first flange (5) is fixedly connected to the surface of the first pipe body (1), a second flange (6) is fixedly connected to the surface of the second pipe body (3), a sealing mechanism (7) is provided between opposite sides of the first pipe body (1) and the second pipe body (3), and a connection protection mechanism (2) is provided on the surface of the first flange (5); The sealing mechanism (7) comprises two fixing rings (701), a first sealing gasket (702), a connecting pipe (703) and two second sealing gaskets (704), wherein the first sealing gasket (702) is fixedly sleeved on the surface of the connecting pipe (703), the second sealing gasket (704) is fixedly connected to the connecting pipe (703) on a side close to the connecting pipe (703), the surface of the rear fixing ring (701) is fixedly connected to the inner wall of the first pipe body (1), the surface of the front fixing ring (701) is fixedly connected to the inner wall of the second pipe body (3), the surfaces of the first flange (5) and the second flange (6) are both in contact with the surface of the first sealing gasket (702), the rear side of the rear second sealing gasket (704) is in contact with the front side of the rear fixing ring (701), and the front side of the front second sealing gasket (704) is in contact with the rear side of the front fixing ring (701).

2. The well-killing manifold sealing device under high pressure environment according to claim 1, characterized in that: The connection protection mechanism (2) comprises two arc-shaped connection covers (201), two first fixing blocks (202), two connection columns (203) and two second fixing blocks (204); the surfaces of the first flange (5) and the second flange (6) are both in contact with the inner wall of the arc-shaped connection cover (201); the side of the first fixing block (202) close to the top arc-shaped connection cover (201) is fixedly connected to the top arc-shaped connection cover (201); the side of the second fixing block (204) close to the bottom arc-shaped connection cover (201) is fixedly connected to the bottom arc-shaped connection cover (201); and the bottom of the connection column (203) is fixedly connected to the top of the second fixing block (204).

3. The well-killing manifold sealing device under high pressure environment according to claim 2, characterized in that: The top of the connecting column (203) passes through the first fixed block (202) and extends to the top of the first fixed block (202). A limiting barrel (10) is provided on the top of the connecting column (203). The limiting barrel (10) is threadedly connected to the surface of the connecting column (203). The bottom of the limiting barrel (10) contacts the top of the first fixed block (202).

4. The well-killing manifold sealing device under high-pressure environment according to claim 3, characterized in that: The top of the limiting barrel (10) is fixedly connected with a screwing post (9), and the number of the screwing posts (9) is several and evenly distributed on the surface of the limiting barrel (10).

5. The well-killing manifold sealing device under high-pressure environment according to claim 2, characterized in that: The surface of the arc-shaped connecting cover (201) is provided with a chamfer, and the front side and the rear side of the arc-shaped connecting cover (201) are both fixedly connected with a pull ring (11).

6. The well-killing manifold sealing device under high-pressure environment according to claim 2, characterized in that: A cushion block (8) is fixedly connected to the surface of the arc-shaped connection cover (201).

7. The well-killing manifold sealing device under high pressure environment according to claim 1, characterized in that: A chamfer is provided on the inner wall of the fixing ring (701) at a side away from the second sealing gasket (704), and the fixing ring (701) is made of wear-resistant metal.

8. The well-killing manifold sealing device under high-pressure environment according to claim 1, characterized in that: A reinforcing steel ring (4) is provided inside the first sealing gasket (702), and the reinforcing steel ring (4) and the first sealing gasket (702) are integrally formed.

9. The well-killing manifold sealing device under high pressure environment according to claim 2, characterized in that: The arc-shaped connecting cover (201), the first fixing block (202), the second fixing block (204) and the connecting column (203) are all made of high-strength rust-proof metal.

10. The well-killing manifold sealing device under high-pressure environment according to claim 1, characterized in that: The first sealing gasket (702) and the second sealing gasket (704) are both made of polytetrafluoroethylene.

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