Anti-pollution device for oil exploitation

Abstract

The utility model relates to the technical field of oil exploitation tools, and discloses an anti-pollution device for oil exploitation, which comprises a flashboard type blowout prevention mechanism and an annular blowout prevention mechanism, the flashboard type blowout prevention mechanism comprises a first flashboard blowout prevention assembly, and the top end of the first flashboard blowout prevention assembly is connected with a second flashboard blowout prevention assembly through a spacing mechanism. By adopting the combined blowout prevention structural design, the double-ram blowout prevention device is provided with the two double-ram blowout prevention assemblies and the annular blowout preventer, and the ram blowout preventer is operated through the hydraulic control assembly, so that an annular space between a drill rod or a sleeve and a wellhead can be accurately sealed; the annular blowout preventer can achieve sealing of a well mouth under the condition that no drill rod exists, a plurality of independent sealing blowout prevention structures are arranged on the whole, redundancy of the whole blowout prevention structure is further increased, it is ensured that when one blowout prevention assembly breaks down, other blowout prevention assemblies can still work normally, and the blowout prevention and pollution prevention effects in oil exploitation are achieved.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction equipment technology, specifically to a pollution prevention device used in oil extraction. Background Technology

[0002] Currently, pollution prevention devices used in oil extraction include various types, among which blowout preventers (BOPs) are key equipment for preventing well blowout accidents. Installed on the upper part of the wellhead casing head, a BOP consists of multiple gates and can quickly close the wellhead when downhole pressure abnormally increases, preventing the uncontrolled ejection of crude oil and natural gas. There are various types of BOPs, such as gate BOPs and annular BOPs.

[0003] Existing pollution prevention devices used in oil extraction still have the following problems when in use: Although key equipment such as blowout preventers are designed with redundant systems, mechanical failures, hydraulic system malfunctions, or damage to electronic components may still occur. For example, when working in harsh marine environments for a long time, the seals of the blowout preventer may age and corrode, resulting in a decrease in sealing performance and inability to effectively close the wellhead in an emergency. Utility Model Content

[0004] (a) Technical problems to be solved.

[0005] In view of the shortcomings of the prior art, this utility model provides a pollution prevention device for oil extraction, which solves the problems mentioned in the background art.

[0006] (ii) Technical solution.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a pollution prevention device for oil extraction, comprising a gate-type blowout preventer and an annular blowout preventer. The gate-type blowout preventer includes a first gate-type blowout preventer assembly, and a second gate-type blowout preventer assembly is connected to the top of the first gate-type blowout preventer assembly via a spacer mechanism. The annular blowout preventer is fixedly installed on the top of the second gate-type blowout preventer assembly, and the annular blowout preventer assembly includes an annular blowout preventer.

[0008] As a further embodiment of this utility model: the first gate valve anti-blowout assembly includes a first gate valve body, with a first gate slot on each of the upper and lower sides of the inner cavity of the first gate valve body. A first hydraulic sealing assembly is fixedly installed on the outer side of the first gate valve body at the opening of the first gate slot. The second gate valve anti-blowout assembly includes a second gate valve body, with a second gate slot on each of the upper and lower sides of the inner cavity of the second gate valve body. A second hydraulic sealing assembly is fixedly installed on the outer side of the second gate valve body at the opening of the upper two second gate slots. A third hydraulic sealing assembly is fixedly installed on the outer side of the second gate valve body at the opening of the lower two second gate slots. The hydraulically movable end of the first hydraulic sealing assembly is fixedly connected to a first sealing gate, and the first sealing gate matches the first gate slot on its corresponding side. The hydraulically movable end of the second hydraulic sealing assembly is fixedly connected to a second sealing gate, and the second sealing gate matches the second gate slot on its corresponding side. The hydraulically movable end of the third hydraulic sealing assembly is fixedly connected to a third sealing gate, and the third sealing gate matches the second gate slot on its corresponding side.

[0009] As a further improvement of this utility model: the annular blowout preventer is provided with connecting flanges at both the upper and lower ends of the interface, and the lower connecting flange is fixedly connected to the top interface of the second gate valve body.

[0010] As a further embodiment of this utility model: the spacing mechanism includes a spacer sleeve connecting the first gate valve body and the second gate valve body. A mating hole is provided at each of the front and rear ends of the inner cavity of the spacer sleeve. A mating connector is fixedly installed on the outer wall of the spacer sleeve at the opening of the mating hole. A first through groove is provided on the upper and lower sides of the front and rear ends of the inner cavity of the first gate valve body. A first connecting connector is fixedly installed on the outer wall of the first gate valve body at the opening of the first through groove. A second through groove is provided on the upper and lower sides of the front and rear ends of the inner cavity of the second gate valve body. A second connecting connector is fixedly installed on the outer wall of the second gate valve body at the opening of the second through groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. In this utility model, a combined blowout preventer structure design is adopted, which is equipped with two double-gate blowout preventer components and an annular blowout preventer. The gate blowout preventer is operated by a hydraulic control component and can accurately seal the annular space between the drill pipe or casing and the wellhead. The annular blowout preventer can achieve wellhead sealing even without drill pipe. The whole structure is equipped with multiple independent sealing blowout preventer structures, which further increases the redundancy of the overall blowout preventer structure and ensures that when one blowout preventer component fails, the other blowout preventer components can still work normally, playing a role in blowout prevention and pollution prevention in oil extraction.

[0013] 2. In this utility model, the double gate anti-blowout assembly includes two sets of gate slots arranged symmetrically in an upper and lower configuration. Each set of gate slots consists of two gate slots arranged symmetrically, and each gate slot is equipped with a hydraulic sealing assembly, which includes a sealing gate that matches the gate slot. The two gates arranged symmetrically move towards each other, which can seal the valve body cavity of the gate valve and achieve anti-blowout. The opposing double hydraulic sealing structure has good structural reliability. Attached Figure Description

[0014] Figure 1 This is a perspective view of the entire utility model;

[0015] Figure 2 This is a three-dimensional cross-sectional view of the gate-type blowout preventer mechanism of this utility model. Figure 1 ;

[0016] Figure 3 This is a three-dimensional cross-sectional view of the gate-type blowout preventer mechanism of this utility model. Figure 2 ;

[0017] Figure 4 This is a perspective view of the annular anti-spray mechanism of this utility model.

[0018] In the figure: 1. First gate valve blowout preventer assembly; 2. Spacing mechanism; 3. Second gate valve blowout preventer assembly; 4. Annular blowout preventer mechanism; 11. First gate valve body; 12. First through groove; 13. First gate groove; 14. First hydraulic sealing assembly; 15. First connecting joint; 21. Spacer sleeve; 22. Mating hole; 23. Mating joint; 31. Second gate valve body; 32. Second through groove; 33. Second gate groove; 34. Second hydraulic sealing assembly; 35. Second hydraulic sealing assembly; 36. Second connecting joint; 41. Annular blowout preventer; 42. Connecting flange. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figures 1-4 In this embodiment of the utility model, the pollution prevention device for oil extraction includes a gate-type blowout preventer and an annular blowout preventer 4. The gate-type blowout preventer includes a first gate blowout preventer assembly 1, and a second gate blowout preventer assembly 3 is connected to the top of the first gate blowout preventer assembly 1 through a spacer mechanism 2. The annular blowout preventer 4 is fixedly installed on the top of the second gate blowout preventer assembly 3 and includes an annular blowout preventer 41. The overall design adopts a combined blowout prevention structure, which is equipped with two double gate blowout preventer assemblies and an annular blowout preventer 41. The gate blowout preventer is operated by a hydraulic control assembly and can accurately seal the annular space between the drill pipe or casing and the wellhead. The annular blowout preventer 41 can achieve wellhead sealing even without drill pipe. The overall design has multiple independent sealing blowout prevention structures, which further increases the redundancy of the overall blowout prevention structure and ensures that when one blowout preventer assembly fails, other blowout preventer assemblies can still work normally, thus playing a role in preventing blowouts and pollution in oil extraction.

[0023] The first gate valve anti-blowout assembly 1 includes a first gate valve body 11. A first gate slot 13 is formed on each of the upper and lower sides of the inner cavity of the first gate valve body 11. A first hydraulic sealing assembly 14 is fixedly installed on the outer side of the first gate valve body 11 at the opening of the first gate slot 13. The second gate valve anti-blowout assembly 3 includes a second gate valve body 31. A second gate slot 33 is formed on each of the upper and lower sides of the inner cavity of the second gate valve body 31. A second hydraulic sealing assembly 34 is fixedly installed on the outer side of the second gate valve body 31 at the opening of the upper two second gate slots 33. A third hydraulic sealing assembly 35 is fixedly installed on the outer side of the second gate valve body 31 at the opening of the lower two second gate slots 33. The hydraulically movable end of the first hydraulic sealing assembly 14 is fixedly connected to a first sealing gate. The sealing gate plate matches the first gate plate groove 13 on its corresponding side. The hydraulic movable end of the second hydraulic sealing assembly 34 is fixedly connected to the second sealing gate plate, and the second sealing gate plate matches the second gate plate groove 33 on its corresponding side. The hydraulic movable end of the third hydraulic sealing assembly 35 is fixedly connected to the third sealing gate plate, and the third sealing gate plate matches the second gate plate groove 33 on its corresponding side. The overall double gate plate anti-blowout assembly includes two sets of gate plate grooves arranged symmetrically in the upper and lower positions. Each set of gate plate grooves consists of two symmetrically arranged gate plates, and each gate plate groove is equipped with a hydraulic sealing assembly, which includes a sealing gate plate that matches the gate plate groove. The two gate plates arranged symmetrically move towards each other, which can cooperate with the drill rod to seal the valve body cavity of the gate valve and achieve anti-blowout. The structure of the opposing double hydraulic sealing structure has good reliability.

[0024] The annular blowout preventer 41 is equipped with connecting flanges 42 at both the upper and lower ends of the interface. The lower connecting flange 42 is fixedly connected to the top interface of the second gate valve body 31. The fixed connection between the first gate blowout preventer assembly 1, the spacing mechanism 2, the second gate blowout preventer assembly 3 and the annular blowout preventer 41 is all achieved by connecting bolts, which can be easily disassembled and assembled.

[0025] The spacer mechanism 2 includes a spacer sleeve 21 connecting the first gate valve body 11 and the second gate valve body 31. Each end of the spacer sleeve 21 has a mating hole 22. A mating connector 23 is fixedly installed on the outer wall of the spacer sleeve 21 at the opening of the mating hole 22. Each end of the first gate valve body 11 has a first through groove 12 on the upper and lower sides. A first connecting connector 15 is fixedly installed on the outer wall of the first gate valve body 11 at the opening of the first through groove 12. Each end of the second gate valve body 31 has a second through groove 32 on the upper and lower sides. A second connecting connector 36 is fixedly installed on the outer wall of the second gate valve body 31 at the opening of the second through groove 32. The corresponding oil pipelines can be connected through multiple connectors.

[0026] The working principle of this utility model is as follows: the corresponding oil pipelines can be connected through multiple joints. The fixed connection between the first gate blowout preventer assembly 1, the spacing mechanism 2, the second gate blowout preventer assembly 3 and the annular blowout preventer 41 is all connected by connecting bolts, which can be easily disassembled and assembled. The overall double gate blowout preventer assembly includes two sets of gate slots arranged symmetrically above and below. Each set of gate slots has two gate slots arranged symmetrically, and each gate slot is provided with a hydraulic sealing assembly, which includes a sealing gate that matches the gate slot. The two gates arranged symmetrically move towards each other, which can cooperate with the drill pipe to seal the valve body cavity of the gate valve and achieve blowout prevention. The opposing double hydraulic sealing structure has good structural reliability. That is, the gate blowout preventer is operated by the hydraulic control assembly and can accurately seal the annular space between the drill pipe or casing and the wellhead. At the same time, the annular blowout preventer 41 can achieve wellhead sealing without drill pipe.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An anti-pollution device for oil exploitation, comprising a gate-type blowout preventer and an annular blowout preventer (4); characterized in that The gate-type blowout preventer comprises a first gate blowout preventer assembly (1), and a second gate blowout preventer assembly (3) is connected to the top end of the first gate blowout preventer assembly (1) through a spacing mechanism (2); The first gate blowout preventer assembly (1) comprises a first gate valve body (11), and a first gate slot (13) is formed on each of the upper and lower sides of the inner cavity of the first gate valve body (11) at both ends; a first hydraulic sealing assembly (14) is fixedly installed on the outer side of the first gate valve body (11) and located at the opening of the first gate slot (13); The second gate blowout preventer assembly (3) comprises a second gate valve body (31), and a second gate slot (33) is formed on each of the upper and lower sides of the inner cavity of the second gate valve body (31) at both ends; a second hydraulic sealing assembly (34) is fixedly installed on the outer side of the second gate valve body (31) and located at the opening of the upper two second gate slots (33), and a third hydraulic sealing assembly (35) is fixedly installed on the outer side of the second gate valve body (31) and located at the opening of the lower two second gate slots (33); The annular blowout preventer (4) is fixedly installed at the top end of the second gate blowout preventer assembly (3), and the annular blowout preventer (4) comprises an annular blowout preventer (41).

2. The anti-pollution device for oil production according to claim 1, characterized in that: The hydraulic movable end of the first hydraulic sealing assembly (14) is fixedly connected with a first sealing gate plate, and the first sealing gate plate is matched with the first gate slot (13) on the corresponding side.

3. The anti-pollution device for oil production according to claim 1, characterized in that: The hydraulic movable end of the second hydraulic sealing assembly (34) is fixedly connected with a second sealing gate plate, and the second sealing gate plate is matched with the second gate slot (33) on the corresponding side.

4. The anti-pollution device for oil production according to claim 1, characterized in that: The hydraulic movable end of the third hydraulic sealing assembly (35) is fixedly connected with a third sealing gate plate, and the third sealing gate plate is matched with the second gate slot (33) on the corresponding side.

5. The anti-pollution device for oil production according to claim 1, characterized in that: The spacing mechanism (2) comprises a spacing sleeve (21) connecting the first gate valve body (11) and the second gate valve body (31), and a matching hole (22) is formed on each of the front and rear ends of the inner cavity of the spacing sleeve (21); a matching connector (23) is fixedly installed on the outer wall of the spacing sleeve (21) and located at the opening of the matching hole (22).

6. The anti-pollution device for oil production according to claim 1, characterized in that: First through slots (12) are formed on each of the upper and lower sides of the inner cavity of the first gate valve body (11) at both ends; first connecting connectors (15) are fixedly installed on the outer wall of the first gate valve body (11) and located at the opening of the first through slots (12); second through slots (32) are formed on each of the upper and lower sides of the inner cavity of the second gate valve body (31) at both ends; and second connecting connectors (36) are fixedly installed on the outer wall of the second gate valve body (31) and located at the opening of the second through slots (32).

7. The anti-pollution device for oil production according to claim 1, characterized in that: Connecting flanges (42) are arranged at the interfaces of the upper and lower ends of the annular blowout preventer (41), and the lower connecting flange (42) is fixedly connected with the top end of the second gate valve body (31).

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