Safety cut-off device for petroleum and natural gas wellhead

Abstract

The utility model discloses a petroleum and natural gas wellhead safety cut-off device which comprises a cut-off valve, flange plates and a supporting assembly, and the flange plates are symmetrically arranged at the input end and the output end of the cut-off valve. The supporting assembly is arranged at the bottom of the flange plate and comprises a connecting part arranged at the bottom of the flange plate, a rotating supporting part is hinged to the bottom of the connecting part, and a clamping part for fixing the rotating supporting part is arranged at the hinged position of the rotating supporting part and the connecting part; according to the block valve, the supporting assembly is arranged at the flange plate connector of the block valve, the clamping part in the supporting assembly is connected with the rotating supporting part hinged to the bottom connecting part of the flange plate in a clamped mode, and therefore the angle of the rotating supporting part is fixed, and a follow-up installation pipeline connector is supported; and compared with the mode that the flange plate is aligned by supporting the pipeline with hands, the situation that the alignment of the flange plate is affected due to fatigue shaking caused by supporting the pipeline with the hands is avoided.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction equipment technology, and in particular to a safety shut-off device for oil and gas wellheads. Background Technology

[0002] Oil and gas wellhead shut-off devices are key equipment for ensuring the safety of oil and gas production. The sealing performance and installation accuracy of their flange interfaces are directly related to the reliability of wellhead operations. In the installation process of traditional shut-off valves, the alignment of the flange and the pipeline interface mainly relies on manual positioning and adjustment by holding the pipeline.

[0003] However, in complex working conditions at the wellhead (narrow space and high temperature environment), manual handling of the pipeline is prone to shaking due to arm fatigue, which causes the flange and pipeline interface axis to deviate, requiring multiple adjustments for alignment, affecting the alignment and installation of the flange.

[0004] Therefore, this paper proposes a safety shut-off device for oil and gas wellheads to address how to achieve temporary auxiliary installation support for flanges and pipe interfaces through modular support components, thereby avoiding shaking when aligning pipe ports by hand. Utility Model Content

[0005] The purpose of this invention is to provide a safety shut-off device for oil and gas wellheads to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a safety shut-off device for oil and gas wellheads, comprising:

[0007] A shut-off valve, used for emergency shut-off of wellhead pipelines;

[0008] Flanges, a plurality of said flanges are symmetrically arranged at the input and output ends of the shut-off valve;

[0009] A support assembly is disposed at the bottom of a flange and is used as an auxiliary support for connecting a pipeline. The support assembly includes a connecting part disposed at the bottom of the flange, and a rotating support part for supporting the pipeline is hinged at the bottom of the connecting part. A snap-fit ​​part for fixing the rotating support part is provided at the hinge point between the rotating support part and the connecting part.

[0010] Preferably, the connecting part includes a connecting block, which is disposed at the bottom of the flange, and the bottom of the connecting block is hinged to the side of the rotating support.

[0011] Preferably, the rotating support includes:

[0012] A rotating block, the top of which is hinged to the top edge of a connecting block;

[0013] A supporting arc block is disposed on top of the rotating block, and the supporting arc block is used to support the connecting pipe.

[0014] Preferably, the snap-fit ​​portion includes:

[0015] A movable bolt, the ends of which are sequentially inserted and connected to the hinge joint of the rotating block and the connecting block;

[0016] A protrusion is provided on the side of the movable bolt, and the side of the protrusion is interlocked with the connection between the connecting block and the rotating block; a spring is provided at the intersection of the rotating block and the movable bolt, and the spring is used to pull the movable bolt back to its original position.

[0017] Preferably, the intersection of the rotating block and the protrusion is provided with a movable groove, and the side of the connecting block is provided with a slot for the connecting block to pass through.

[0018] Preferably, the springback element includes:

[0019] A pressure plate is disposed at the end of the movable bolt and located on the side of the rotating block;

[0020] A compression spring is sleeved on the outside of the movable bolt and located on the side of the pressure plate near the connecting block.

[0021] Preferably, the rotating block has a deformation groove on its side, which is used to compress the spring and the pressure plate.

[0022] The technical effects and advantages of this utility model are as follows:

[0023] This invention features a support assembly at the flange interface of the shut-off valve. The snap-fit ​​part of the support assembly snaps into the rotating support part, which is hinged to the bottom connection part of the flange, thereby fixing the angle of the rotating support part and supporting the subsequent installation of the pipeline interface. This assists in aligning the flange with the installation pipeline interface. Compared to manually aligning the pipeline with the flange, this avoids fatigue and vibration caused by manually aligning the pipeline, which could affect the alignment of the flange. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the structure of the support component of this utility model.

[0026] Figure 3 This is a side view of the support component of this utility model.

[0027] Figure 4 This is a cross-sectional view of the support component of this utility model.

[0028] Figure 5 This is a side view of the connecting block of this utility model.

[0029] In the diagram: 1. Shut-off valve; 101. Flange; 3. Support assembly; 301. Rotating block; 3011. Movable groove; 302. Support arc block; 303. Connecting block; 304. Moving bolt; 305. Pressure plate; 306. Compression spring; 307. Protrusion. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model provides, for example Figure 1-5 As shown:

[0032] Example 1: A safety shut-off device for oil and gas wellheads, comprising: a shut-off valve 1, a flange 101, and a support assembly 3; it should be noted that the shut-off valve 1 is used for emergency shut-off of the wellhead pipeline, multiple flanges 101 are symmetrically arranged at the input and output ends of the shut-off valve 1, and the support assembly 3 is arranged at the bottom of the flange 101, and the support assembly 3 is used for auxiliary support for connecting the pipeline.

[0033] Specifically, the working principle of the overall reference model of the shut-off valve 1 and the flange 101 is the ESD type wellhead shut-off device; the support assembly 3 includes a connecting part set at the bottom of the flange 101, and a rotating support part for supporting the pipeline is hinged at the bottom of the connecting part. A snap-fit ​​part for fixing the rotating support part is provided at the hinge between the rotating support part and the connecting part.

[0034] It should be noted that the connecting part includes a connecting block 303, which is disposed at the bottom of the flange 101, and the bottom of the connecting block 303 is hinged to the side of the rotating support.

[0035] Specifically, the connecting block 303 is welded and fixed to the bottom of the flange 101. When installing the shut-off valve 1, it is generally first connected to the pipe with a fixed position by a flange. The other end of the shut-off valve 1 is the end of the pipe with a rotating support position that is not fixed. The shut-off valve 1 is welded and fixed to the flange 101.

[0036] Furthermore, the rotating support includes: a rotating block 301 and a supporting arc block 302;

[0037] Specifically, the top of the rotating block 301 is hinged to the top side of the connecting block 303, and the supporting arc block 302 is disposed on the top of the rotating block 301. The supporting arc block 302 is used to support the connecting pipe.

[0038] It should be noted that the support arc block 302 and the rotating block 301 are fixed by welding. The curvature of the support arc block 302 is the same as the curvature of the flange at the pipe port. The snap-fit ​​part includes: a movable bolt 304, a protrusion 307 and a spring-loaded part.

[0039] Specifically, the end of the movable bolt 304 is sequentially connected to the hinge of the rotating block 301 and the connecting block 303, the protrusion 307 is provided on the side of the movable bolt 304, the side of the protrusion 307 is connected to the connection between the connecting block 303 and the rotating block 301, and the spring is provided at the intersection of the rotating block 301 and the movable bolt 304.

[0040] It should be noted that the spring-loaded component is used to pull the movable bolt 304 back to its original position. A movable groove 3011 is provided at the intersection of the rotating block 301 and the protrusion 307. A slot for the connecting block 303 to pass through is provided on the side of the connecting block 303. The protrusion 307 and the movable bolt 304 are fixed by welding. Part of the connecting block 303 enters the slot, and the rest is in the movable groove 3011, thereby fixing the hinge angle between the connecting block 303 and the rotating block 301.

[0041] Example 2: A rebound component, applied to the oil and gas wellhead safety shut-off device in Example 1;

[0042] Specifically, the springback components include: pressure plate 305 and compression spring 306;

[0043] It should be noted that the pressure plate 305 is disposed at the end of the movable bolt 304 and located on the side of the rotating block 301, and the compression spring 306 is sleeved on the outside of the movable bolt 304 and located on the side of the pressure plate 305 near the connecting block 303.

[0044] Specifically, the pressure plate 305 and the movable bolt 304 are fixed by welding. The side of the rotating block 301 is provided with a deformation groove. The deformation groove is used to compress the spring 306 and the pressure plate 305. The operator pulls the movable bolt 304 to make the protrusion 307 disengage from the slot, thereby realizing the hinge unlocking of the rotating block 301 and the connecting block 303.

[0045] In actual use, a support component 3 is provided at the flange 101 interface of the shut-off valve 1. The snap-fit ​​part in the support component 3 snaps into the rotating support part which is hinged to the bottom connection part of the flange 101, thereby fixing the angle of the rotating support part and supporting the subsequent installation of the pipe interface. This assists in the alignment and installation support of the flange 101 and the installation pipe interface. Compared with manually supporting the pipe to align with the flange 101, this avoids fatigue vibration caused by manually supporting the pipe, which would affect the alignment of the flange 101.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A safety shut-off device for oil and gas wellheads, characterized in that, include: Shut-off valve (1), said shut-off valve (1) is used for emergency shut-off of wellhead pipeline; Flanges (101), a plurality of said flanges (101) are symmetrically arranged at the input and output ends of the shut-off valve (1); Support assembly (3) is disposed at the bottom of flange (101). The support assembly (3) is used as an auxiliary support for connecting pipes. The support assembly (3) includes a connecting part disposed at the bottom of flange (101). A rotating support part for supporting pipes is hinged at the bottom of the connecting part. A snap-fit ​​part for fixing the rotating support part is provided at the hinge of the rotating support part and the connecting part.

2. The oil and gas wellhead safety shut-off device according to claim 1, characterized in that, The connecting part includes a connecting block (303), which is disposed at the bottom of the flange (101), and the bottom of the connecting block (303) is hinged to the side of the rotating support.

3. The oil and gas wellhead safety shut-off device according to claim 2, characterized in that, The rotating support includes: Rotating block (301), the top of which is hinged to the top side of connecting block (303); A support arc block (302) is disposed on the top of the rotating block (301) and is used to support the connecting pipe.

4. The oil and gas wellhead safety shut-off device according to claim 2, characterized in that, The snap-fit ​​part includes: a movable bolt (304), the end of which is sequentially inserted and connected to the hinge of the rotating block (301) and the connecting block (303); A protrusion (307) is provided on the side of the movable bolt (304), and the side of the protrusion (307) is interlocked with the connection between the connecting block (303) and the rotating block (301). A spring-loaded component is provided at the intersection of the rotating block (301) and the movable bolt (304), and the spring-loaded component is used to pull the movable bolt (304) back to its original position.

5. The oil and gas wellhead safety shut-off device according to claim 3, characterized in that, The rotating block (301) and the protrusion (307) have an active groove (3011) at their intersection, and the connecting block (303) has a slot on its side for the connecting block (303) to pass through.

6. The oil and gas wellhead safety shut-off device according to claim 4, characterized in that, The spring-loaded component includes: a pressure plate (305), which is disposed at the end of the movable bolt (304) and located on the side of the rotating block (301); and a compression spring (306), which is sleeved on the outside of the movable bolt (304) and located on the side of the pressure plate (305) near the connecting block (303).

7. The oil and gas wellhead safety shut-off device according to claim 6, characterized in that, The rotating block (301) has a deformation groove on its side, which is used to compress the spring (306) and the pressure plate (305) by squeezing and moving.

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