Impact resistant casing head seal assembly

Abstract

The utility model relates to the technical field of casing heads, and discloses an impact-resistant casing head sealing assembly which comprises a casing head body, the top of the casing head body is fixedly connected with a connecting flange, in the impact-resistant casing head sealing assembly, a positioning ring can be used for limiting and supporting the bottom of an extension part, a pull rod can be limited and fixed through a limiting part, and the extension part can be used for limiting and supporting the bottom of the extension part. The installation stability of the first fixing ring in the casing head body can be improved, so that the whole sealing assembly can be rapidly installed, disassembled and replaced in the casing head body conveniently, the use effect of a follow-up casing head is guaranteed, primary buffering and secondary buffering are conducted through the spring and the elastic buffering ring, the impact resistance effect of the sealing assembly is improved, and the service life of the sealing assembly is prolonged. The contact area of the reinforcing ribs and the casing head body can be increased through the extension strips, the reinforcing ribs are reinforced through the fixing frames and the reinforcing pieces, and therefore the strength of the outer ring face of the casing head is improved, and collision damage to the outer ring face of the casing head is reduced.

Description

Technical Field

[0001] The utility model application relates to the technical field of casing heads, in particular to an impact-resistant casing head sealing component. Background Art

[0002] The casing head is primarily used to connect casing between layers, between casing and blowout preventers, and to support and connect the casing to the oil (gas) wellhead after completion. It is not only the key connection between the casing and the wellhead during drilling, but also serves as a transitional connection to the upper wellhead equipment (such as the Christmas tree) after completion.

[0003] In the prior art, although the impact resistance of the casing head sealing assembly is improved, the sealing assembly will be worn or damaged during long-term use. The damaged sealing assembly will reduce the sealing protection effect of the casing head. The sealing assembly is relatively fixed in the installation position inside the casing head and is not easy to be quickly disassembled and replaced, which affects the use effect of the casing head. Summary of the Invention

[0004] In order to solve the problem that the sealing assembly will be worn or damaged after long-term use, the sealing protection effect of the damaged sealing assembly on the casing head is reduced, and the sealing assembly is relatively fixed in the installation position inside the casing head, which is not easy to be quickly disassembled and replaced, thereby affecting the use effect of the casing head, the utility model provides an impact-resistant casing head sealing assembly to solve the above problems.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An impact-resistant casing head sealing assembly comprises a casing head body, a connecting flange fixedly connected to the top of the casing head body, a connecting hole provided on one side of the connecting flange, a mounting mechanism provided on one side of the connecting hole, the mounting mechanism comprising a limiting ring, a limiting piece and a positioning ring, the bottom of the limiting ring is plugged into the connecting hole, the outer ring surface of the positioning ring is fixedly connected to the inner wall of the casing head body, an annular groove is provided on the top of the positioning ring, an extension rod is plugged into the annular groove, the extension rod is slidably connected to the annular groove, and the top of the extension rod is fixedly connected to the extension piece The top of the extension piece is overlapped with a sealing ring, the top of the sealing ring is engaged with an auxiliary piece, a guide rod is inserted through the side wall of the sealing ring, the top of the guide rod is fixedly connected with a fixing ring 2, and a pull rod is provided on one side of the fixing ring 2. The top of the pull rod is connected with a limiting piece, one side of the limiting piece is slidably connected to the inner wall of the limiting ring, the bottom of the limiting piece is engaged with the connecting flange, and the bottom of the pull rod is fixedly connected with a fixing ring 1, the outer ring surface of the fixing ring 1 is connected to the inner wall of the casing head body by a threaded connection, and the fixing ring 1 is penetrated by the guide rod.

[0007] Further, the inner wall of the extension piece is fixedly connected with an embedded pipe, springs are arranged between the outer wall of the embedded pipe and the inner wall of the extension piece, and the top of the spring is fixedly connected with a sealing ring.

[0008] Further, the top of the auxiliary piece is fixedly connected with an elastic buffer ring, the auxiliary piece and the elastic buffer ring are penetrated by a guide rod, the guide rod is in sliding connection with the elastic buffer ring, the top of the elastic buffer ring is in clasp connection with a fixed ring, and the bottom of the guide rod is fixedly connected with the extension piece.

[0009] Further, the bottom of the sealing ring is provided with a guide groove, an extension pipe is in sliding connection in the guide groove, and the bottom of the extension pipe is fixedly connected with the extension piece.

[0010] Further, the sleeve head main body is fixedly connected with a branch pipe on one side, and a control valve is arranged on the branch pipe.

[0011] Further, the sleeve head main body is overlapped with an extension strip on the outer ring surface, the extension strip is inserted with a reinforcing rib at the bottom, and one end of the reinforcing rib is fixedly connected with the sleeve head main body.

[0012] Further, the reinforcing rib is five in number, reinforcing pieces are fixedly connected between the reinforcing ribs, and the reinforcing piece is arc-shaped.

[0013] Further, the reinforcing rib is fixedly connected with a fixing frame, and the fixing frame is threadedly connected with a limiting bolt.

[0014] Meanwhile, through the above technical scheme, the utility model at least has the following beneficial effects:

[0015] 1、 in the utility model, the guide rod can penetrate the elastic buffer ring and the sealing ring, so that the elastic buffer ring, the sealing ring and the extension piece move synchronously, the positioning ring can position and support the bottom of the extension piece, the limiting piece can position and fix the pull rod, the stability of the fixed ring one installed in the sleeve head main body can be improved, so that the quick installation, disassembly and replacement of the whole sealing assembly in the sleeve head main body are facilitated, and the use effect of the subsequent sleeve head is ensured.

[0016] 2、 in the utility model, the length of the extension pipe in the sealing ring can be adjusted through the compression of the spring, the elastic buffer ring can be connected with the auxiliary piece, the spring and the elastic buffer ring are used for primary and secondary buffering respectively, the impact resistance of the sealing group is improved, the contact area of the reinforcing rib and the sleeve head main body can be increased through the extension strip, the reinforcing rib is reinforced through the fixing frame and the reinforcing piece, so that the strength of the outer ring surface of the sleeve head is improved, the collision damage of the outer ring surface of the sleeve head is reduced, and the interference on the use of the sealing assembly is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a casing head sealing assembly according to an embodiment of the present application;

[0019] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the limit bolt structure in the embodiment shown;

[0020] Figure 3 yes Figure 1 Schematic diagram of the installation of the limiter structure in the embodiment shown;

[0021] Figure 4 yes Figure 1 A schematic diagram of the installation of the second structure of the fixing ring in the embodiment shown;

[0022] Figure 5 yes Figure 1 Schematic diagram of spring structure installation in the shown embodiment.

[0023] In the figure: 1. Casing head body; 2. Control valve; 3. Reinforcement piece; 4. Fixing frame; 5. Reinforcement rib; 6. Extension strip; 7. Limiting ring; 8. Connecting flange; 9. Limiting bolt; 10. Limiting piece; 11. Fixing ring 1; 12. Connecting hole; 13. Pull rod; 14. Positioning ring; 15. Sealing ring; 16. Fixing ring 2; 17. Elastic buffer ring; 18. Spring; 19. Internal tube; 20. Extension piece; 21. Auxiliary piece; 22. Guide rod; 23. Extension tube. DETAILED DESCRIPTION

[0024] In order to make the purpose, features, and advantages of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described below are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] Reference Figure 1-Figure 5, an impact-resistant casing head sealing assembly, including a casing head body 1, a connecting flange 8 is fixedly connected to the top of the casing head body 1, a connecting hole 12 is opened on one side of the connecting flange 8, a mounting mechanism is provided on one side of the connecting hole 12, the mounting mechanism includes a limiting ring 7, a limiting member 10 and a positioning ring 14, the bottom of the limiting ring 7 is plugged into the connecting hole 12, the outer ring surface of the positioning ring 14 is fixedly connected to the inner wall of the casing head body 1, an annular groove is opened on the top of the positioning ring 14, an extension rod is inserted into the annular groove, the extension rod is slidably connected to the annular groove, and the top of the extension rod is fixedly connected to the extension member 20, the extension member 2 0A sealing ring 15 is overlapped on the top, an auxiliary part 21 is engaged with the top of the sealing ring 15, a guide rod 22 is inserted through the side wall of the sealing ring 15, and a fixing ring 2 16 is fixedly connected to the top of the guide rod 22. A pull rod 13 is provided on one side of the fixing ring 2 16. A limiting member 10 is inserted on the top of the pull rod 13. One side of the limiting member 10 is slidably connected to the inner wall of the limiting ring 7. The bottom of the limiting member 10 is engaged with the connecting flange 8. A fixing ring 11 is fixedly connected to the bottom of the pull rod 13. The outer ring surface of the fixing ring 11 is connected to the inner wall of the casing head body 1 through a threaded connection, and the fixing ring 11 is penetrated by the guide rod 22.

[0026] Specifically, the connection between the casing head body 1 and the limiting ring 7 can be assisted by the connecting flange 8, and the installation position of the sealing assembly inside the casing head body 1 can be limited by the positioning ring 14 to avoid the sealing assembly being installed too deep. The connection between the positioning ring 14 and the extension piece 20 can be achieved through the annular groove and the extension rod. The extension rod makes a circular motion in the annular groove, which can reduce the interference of the positioning ring 14 on the movement of the extension rod. The top of the guide rod 22 can be limited by the connection with the fixing ring 2 16, and the connection between the sealing ring 15 and the elastic buffer ring 17 can be achieved, which is convenient for realizing the synchronous movement of the sealing ring 15 and the elastic buffer ring 17 when the sealing assembly is installed and disassembled. The pull rod 13 can assist the rotation of the fixing ring 11 inside the casing head body 1, and then the fixing and disassembly of the fixing ring 11 can be realized by the thread, which is convenient for the installation and disassembly of the sealing assembly inside the casing head body 1.

[0027] As an optimization solution, Figure 1-Figure 5As shown, the inner wall of the extension piece 20 is fixedly connected with the built-in tube 19, and a spring 18 is installed between the outer wall of the built-in tube 19 and the inner wall of the extension piece 20. The top of the spring 18 is fixedly connected to the sealing ring 15, and the top of the auxiliary piece 21 is fixedly connected with the elastic buffer ring 17. The auxiliary piece 21 and the elastic buffer ring 17 are penetrated by the guide rod 22. The guide rod 22 and the elastic buffer ring 17 are slidably connected. The top of the elastic buffer ring 17 is engaged with the fixing ring 11, and the bottom of the guide rod 22 is fixedly connected to the extension piece 20. The bottom of the sealing ring 15 is provided with a Guide groove, an extension tube 23 is slidably connected in the guide groove, the bottom of the extension tube 23 is fixedly connected to the extension piece 20, one side of the casing head body 1 is fixedly connected with a branch pipe, a control valve 2 is installed on the branch pipe, the outer ring surface of the casing head body 1 is overlapped with an extension strip 6, the bottom of the extension strip 6 is plugged with a reinforcing rib 5, one end of the reinforcing rib 5 is fixedly connected to the casing head body 1, there are five reinforcing ribs 5, and reinforcement pieces 3 are fixedly connected between the reinforcing ribs 5. The reinforcement piece 3 is arc-shaped, and a fixing frame 4 is fixedly connected between the reinforcing ribs 5. The fixing frame 4 is connected to the limiting bolt 9 by a thread.

[0028] Specifically, the connection between the sealing ring 15 and the extension piece 20 can be achieved through the spring 18, and the built-in tube 19 can wrap and protect the inner side of the spring 18. The distance between the sealing ring 15 and the extension piece 20 can be adjusted by the contraction of the spring 18, thereby controlling the insertion depth of the extension tube 23 inside the sealing ring 15 to prevent the extension tube 23 from separating from the sealing ring 15. The spring 18 can buffer the sealing ring 15, and the elastic elastic buffer ring 17 can buffer the bottom of the fixing ring 11, thereby reducing the impact of the inside of the casing head body 1 on the sealing assembly. The control valve 2 can assist the installation and use of the branch pipe. The extension strip 6 can increase the contact area between the reinforcing rib 5 and the casing head body 1, thereby improving the strength of the outer ring surface of the casing head body 1. The reinforcement 3 and the fixing frame 4 can connect multiple reinforcing ribs 5 to form a whole, and use the whole to support and reinforce the casing head body 1, reduce damage to the outside of the casing head body 1, and thereby reduce deformation caused by external force impact, thereby reducing interference with the internal sealing assembly during use.

[0029] Working principle: First, one end of the casing head body 1 is installed and fixed by the limit bolt 9 on the fixing frame 4. Then, when the inside of the casing head body 1 is impacted, the spring 18 contracts and drives the extension piece 20 and the built-in tube 19 to move up. At this time, the extension tube 23 slides inside the sealing ring 15, and the extension rod moves up in the annular groove, but does not separate from the annular groove. The extension piece 20 squeezes the sealing ring 15, and the sealing ring 15 squeezes the auxiliary piece 21 and the elastic buffer ring 17. After compression, the elastic buffer ring 17 fits more tightly with the top of the fixing ring 11 to ensure the sealing effect on the bottom of the casing head body 1. When it is needed When cleaning, disassembling and replacing the sealing structure, remove the limit piece 10 from the top of the pull rod 13, pull the two pull rods 13, and rotate the fixing ring 11 inside the casing head body 1 until the fixing ring 11 is separated from the thread on the inner wall of the casing head body 1. When the fixing ring 11 rotates, due to the limiting effect of the guide rod 22, the elastic buffer ring 17, the sealing ring 15 and the extension piece 20 rotate synchronously with the fixing ring 11, and the extension rod at the bottom of the extension piece 20 rotates in the annular groove of the positioning ring 14. Then move the fixing ring 11 upward and take out the sealing ring 15 and the extension piece 20 together.

[0030] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. Impact-resistant casing head sealing assembly, characterized by: The invention comprises a casing head body (1), wherein a connecting flange (8) is fixedly connected to the top of the casing head body (1), a connecting hole (12) is provided on one side of the connecting flange (8), and a mounting mechanism is provided on one side of the connecting hole (12), wherein the mounting mechanism comprises a limiting ring (7), a limiting member (10) and a positioning ring (14), wherein the bottom of the limiting ring (7) is plugged into the connecting hole (12), the outer ring surface of the positioning ring (14) is fixedly connected to the inner wall of the casing head body (1), an annular groove is provided on the top of the positioning ring (14), an extension rod is plugged into the annular groove, the extension rod is slidably connected to the annular groove, and the top of the extension rod is fixedly connected to the extension member (20), and a sealing ring (15) is overlapped on the top of the extension member (20). The top of the sealing ring (15) is engaged with an auxiliary part (21), and a guide rod (22) is inserted through the side wall of the sealing ring (15). The top of the guide rod (22) is fixedly connected with a fixing ring 2 (16), and a pull rod (13) is provided on one side of the fixing ring 2 (16). The top of the pull rod (13) is connected with a limiting part (10), and one side of the limiting part (10) is slidably connected to the inner wall of the limiting ring (7). The bottom of the limiting part (10) is engaged with the connecting flange (8), and the bottom of the pull rod (13) is fixedly connected with a fixing ring 1 (11). The outer ring surface of the fixing ring 1 (11) is connected to the inner wall of the casing head body (1) by a thread, and the fixing ring 1 (11) is penetrated by the guide rod (22).

2. The impact-resistant casing head seal assembly according to claim 1, characterized in that: The inner wall of the extension piece (20) is fixedly connected with an internal tube (19), a spring (18) is installed between the outer wall of the internal tube (19) and the inner wall of the extension piece (20), and the top of the spring (18) is fixedly connected with the sealing ring (15).

3. The impact-resistant casing head seal assembly according to claim 1, characterized in that: The top of the auxiliary member (21) is fixedly connected to an elastic buffer ring (17), and the auxiliary member (21) and the elastic buffer ring (17) are both penetrated by a guide rod (22). The guide rod (22) and the elastic buffer ring (17) are slidably connected, the top of the elastic buffer ring (17) is snap-connected to a fixing ring (11), and the bottom of the guide rod (22) is fixedly connected to an extension member (20).

4. The impact-resistant casing head seal assembly according to claim 1, wherein: A guide groove is provided at the bottom of the sealing ring (15), an extension tube (23) is slidably connected in the guide groove, and the bottom of the extension tube (23) is fixedly connected to the extension piece (20).

5. The impact-resistant casing head seal assembly according to claim 1, characterized in that: One side of the casing head body (1) is fixedly connected to a branch pipe, and a control valve (2) is installed on the branch pipe.

6. The impact-resistant casing head seal assembly according to claim 1, characterized in that: An extension strip (6) is overlapped on the outer ring surface of the sleeve head body (1), a reinforcing rib (5) is inserted into the bottom of the extension strip (6), and one end of the reinforcing rib (5) is fixedly connected to the sleeve head body (1).

7. The impact-resistant casing head seal assembly according to claim 6, characterized in that: There are five reinforcing ribs (5) in total, and reinforcing pieces (3) are fixedly connected between the reinforcing ribs (5), and the reinforcing pieces (3) are arc-shaped.

8. The impact-resistant casing head seal assembly according to claim 7, characterized in that: A fixing frame (4) is fixedly connected between the reinforcing ribs (5), and the fixing frame (4) is connected to a limiting bolt (9) via a threaded connection.

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