Blowout preventer for plugging drilling wellhead

Abstract

The utility model relates to the technical field of blowout prevention devices, and discloses a drilling wellhead plugging blowout prevention device which comprises an anti-blocking bin and a connecting assembly used for conducting auxiliary connection on the anti-blocking bin and a first fixing pipe, and the bottom face of the anti-blocking bin is provided with a first fixing pipe. The connecting assembly is arranged on the outer circle wall face of the first fixing pipe, and through mutual cooperative use of the arranged anti-blocking bin, the first fixing pipe, the connecting plate, the threaded column and the first limiting groove, the connecting plate, the threaded column and the limiting plate can rapidly and preliminarily complete connection of all hole sites; meanwhile, preliminary connection of the anti-blocking bin and the first fixing pipe is achieved, the problems of hole site butt joint errors and the like caused by shaking or other conditions of the anti-blocking bin in the installation process are effectively avoided, connection force of nuts is dispersed through a limiting ring and a limiting plate, force uniformity is guaranteed, meanwhile, transverse limiting of the limiting plate is achieved, and the anti-blocking effect is improved. And therefore, the automatic rotating device is relatively practical.

Description

Technical Field

[0001] This utility model relates to the field of blowout preventer technology, and in particular to a wellhead sealing blowout preventer. Background Technology

[0002] Wellhead plugging and blowout preventers are indispensable safety devices in oil and gas drilling. Their main function is to control downhole pressure during drilling, effectively prevent and handle blowout accidents, and thus avoid serious disasters such as oil and gas leaks, fires, or even explosions.

[0003] In the existing technology, when lifting and installing the blowout preventer, the bottom mounting flange needs to be installed with bolts and nuts. However, the bolts and nuts need to be inserted one by one, which makes it difficult to quickly complete the positioning and connection of all holes. This can easily lead to misalignment of the mounting holes, affecting the installation effect. The installation speed needs to be improved. Therefore, it is necessary to propose a wellhead sealing blowout preventer to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a wellhead sealing and blowout prevention device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A wellhead plugging and blowout prevention device includes a plugging chamber, a first fixing pipe on the bottom surface of the plugging chamber, and a connecting assembly for auxiliary connection between the plugging chamber and the first fixing pipe. The connecting assembly is disposed on the outer circular wall of the first fixing pipe. The connecting assembly includes two connecting plates, both of which are disposed on the outer circular wall of the first fixing pipe. A plurality of threaded posts are fixedly installed on the top surface of the connecting plates. The outer circular wall of each threaded post has a first limiting groove. The threaded post is movably sleeved with the flange mounting hole of the first fixing pipe and the flange mounting hole of the plugging chamber. The outer circular wall of the plugging chamber is provided with two limiting plates. The top surface of each limiting plate has a fixing hole and a limiting hole. The limiting hole is movably sleeved with the first limiting groove, and the first limiting groove is movably sleeved with the limiting plate.

[0007] As a further embodiment of this utility model, a limit ring is movably fitted onto the outer circular wall of the threaded column, and a nut is threaded onto the outer circular wall of the threaded column.

[0008] As a further embodiment of this utility model, the top surface of the limiting plate is provided with a plurality of second limiting grooves, and the second limiting grooves are movably connected to the limiting ring.

[0009] As a further embodiment of this utility model, a plurality of fixing plates are fixedly installed on the outer circular wall surface of the limiting plate.

[0010] As a further embodiment of this utility model, the bottom surface of the anti-clogging chamber is provided with several circular through holes, and a hydraulic cylinder is fixedly sleeved on the inner circular wall of the circular through holes. A second fixed pipe is fixedly installed on the inner bottom surface of the anti-clogging chamber, and a flexible sealing pipe is fixedly sleeved on the outer circular wall of the second fixed pipe. The flexible sealing pipe is fixedly installed on the inner top surface of the anti-clogging chamber, and an annular actuating component is movably sleeved on the outer circular wall of the second fixed pipe. The annular actuating component is fixedly installed on the telescopic shaft of the hydraulic cylinder.

[0011] As a further embodiment of this utility model, the top inner wall of the annular actuating member is parallel to the bottom outer wall of the flexible sealing tube, and the flexible sealing tube is made of rubber.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By using the anti-clogging chamber, the first fixing tube, the connecting plate, the threaded column, and the first limiting groove in cooperation, the connecting plate, the threaded column, and the limiting plate can quickly and initially complete the connection of all holes, and at the same time achieve the initial connection of the anti-clogging chamber and the first fixing tube. This effectively avoids problems such as hole alignment errors caused by shaking of the anti-clogging chamber or other situations during installation. The limiting ring and the limiting plate disperse the connection force of the nut, ensuring uniform force, while also achieving lateral limitation of the limiting plate to prevent it from rotating on its own, which is quite practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a wellhead sealing and blowout prevention device proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of the anti-blocking chamber structure of a drilling wellhead sealing and blowout prevention device proposed in this utility model;

[0016] Figure 3 This is a schematic diagram of the first fixed pipe structure of a drilling wellhead sealing and blowout prevention device proposed in this utility model;

[0017] Figure 4 for Figure 3 A partial structural diagram of A in the middle;

[0018] Figure 5 This is a schematic diagram of the first limiting groove structure of a wellhead sealing and blowout prevention device proposed in this utility model;

[0019] Figure 6 This is a schematic diagram of the threaded column structure of a drilling wellhead sealing and blowout prevention device proposed in this utility model;

[0020] Figure 7 This is a schematic diagram of the connecting plate structure of a drilling wellhead sealing and blowout prevention device proposed in this utility model.

[0021] In the diagram: 1. Anti-clogging chamber; 2. First fixed pipe; 3. Connecting plate; 4. Threaded post; 5. First limiting groove; 6. Limiting plate; 7. Fixing hole; 8. Second limiting groove; 9. Limiting hole; 10. Limiting ring; 11. Nut; 12. Hydraulic cylinder; 13. Second fixed pipe; 14. Circular moving part; 15. Flexible sealing pipe; 16. Fixing plate. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Reference Figures 1-7A wellhead plugging and blowout prevention device includes a plugging chamber 1, a first fixed pipe 2 on the bottom surface of the plugging chamber 1, and a connecting assembly for auxiliary connection between the plugging chamber 1 and the first fixed pipe 2. The connecting assembly is located on the outer circular wall of the first fixed pipe 2 and includes two connecting plates 3, both of which are located on the outer circular wall of the first fixed pipe 2. Several threaded posts 4 are fixedly installed on the top surface of the connecting plates 3. The outer circular wall of the threaded posts 4 is provided with a first limiting groove 5. The threaded posts 4 are movably connected to the flange mounting holes of the first fixed pipe 2 and the flange mounting holes of the plugging chamber 1. Two limiting plates 6 are provided on the outer circular wall of the plugging chamber 1. The top surface of the limiting plates 6 is provided with a fixing hole 7 and a limiting hole 9. The limiting hole 9 is movably connected to the first limiting groove 5, and the first limiting groove 5 is movably connected to the limiting plate 6.

[0026] In use, the anti-clogging chamber 1 is lifted and placed on top of the first fixed pipe 2, aligning the flange mounting holes. Simultaneously, the connecting plate 3 is lifted, and the threaded post 4 is inserted into the flange mounting holes of the anti-clogging chamber 1 and the first fixed pipe 2. Then, the two limiting plates 6 are lifted, allowing several threaded posts 4 to be inserted into several fixing holes 7. The fixing plate 16 is moved, causing the limiting plate 6 to rotate, making the limiting hole 9 rotate and engage with the threaded post 4. At the same time, the first limiting groove 5 engages with the limiting plate 6. Thus, by the limiting plate 6 being engaged within the first limiting groove 5, the connecting plate 3 and the threaded post 4 will not slip or fall. Furthermore, through the cooperation of the limiting plate 6, the threaded post 4, and the connecting plate 3, a preliminary and rapid connection is made between the anti-clogging chamber 1 and the first fixed pipe 2. Compared to connecting and installing one by one using bolts, this method quickly and initially completes the connection of all holes, effectively avoiding problems such as shaking of the anti-clogging chamber 1 or other situations causing hole alignment errors during installation.

[0027] In this embodiment, a limiting ring 10 is movably sleeved on the outer circular wall of the threaded column 4, and a nut 11 is threadedly connected to the outer circular wall of the threaded column 4. Several second limiting grooves 8 are opened on the top surface of the limiting plate 6, and the second limiting grooves 8 are movably sleeved with the limiting ring 10. Several fixing plates 16 are fixedly installed on the outer circular wall of the limiting plate 6. Several circular through holes are opened on the bottom surface of the anti-blocking chamber 1. A hydraulic cylinder 12 is fixedly sleeved on the inner circular wall of the circular through holes. A second fixing tube 13 is fixedly installed on the inner bottom surface of the anti-blocking chamber 1. A flexible sealing tube 15 is fixedly sleeved on the outer circular wall of the second fixing tube 13. The flexible sealing tube 15 is fixedly installed on the inner top surface of the anti-blocking chamber 1. An annular actuating member 14 is movably sleeved on the outer circular wall of the second fixing tube 13. The annular actuating member 14 is fixedly installed on the telescopic shaft of the hydraulic cylinder 12. The top inner wall of the annular actuating member 14 is parallel to the bottom outer wall of the flexible sealing tube 15. The flexible sealing tube 15 is made of rubber.

[0028] In use, the drill pipe passes through the anti-blocking chamber 1, the flexible sealing tube 15, the second fixed tube 13, and the first fixed tube 2, and the downhole pressure is monitored in real time by a pressure sensor. Once an abnormal pressure is detected (such as a sudden pressure rise caused by formation fluid rushing into the wellbore), the control system will quickly issue a command, and the hydraulic system will drive the hydraulic cylinder 12 to push the annular actuator 14 to move the flexible sealing tube 15 to fit against the outer wall of the drill pipe to seal it, closing the wellhead within seconds and preventing formation fluid from gushing out.

[0029] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0030] With the anti-blocking chamber 1 in place, when the user needs to install the anti-blocking chamber 1 to prevent blowout of the first fixed pipe 2 (the first fixed pipe 2 is the drilling wellhead pipe), the anti-blocking chamber 1 is lifted and placed on the top surface of the first fixed pipe 2, aligning the flange mounting holes. Simultaneously, the connecting plate 3 is lifted, and the threaded post 4 is inserted into the flange mounting holes of the anti-blocking chamber 1 and the first fixed pipe 2. Then, the two limiting plates 6 are lifted, allowing several threaded posts 4 to be inserted into several fixing holes 7. The fixing plate 16 is moved, causing the limiting plate 6 to rotate, so that the limiting hole 9 rotates and engages with the threaded post 4. At the same time, the first limiting groove 5 engages with the limiting plate 6. Thus, by the limiting plate 6 being secured within the first limiting groove 5, the connecting plate 3 and the threaded post 4 will not slip or fall. Furthermore, through the limiting plate 6 and the threaded post 4, the connection plate 3 and the threaded post 4 are secured. The threaded column 4 and connecting plate 3 work together to quickly and initially connect the anti-clogging chamber 1 and the first fixed pipe 2. Compared to connecting and installing one by one with bolts, this method quickly and initially completes the connection of all holes, effectively avoiding problems such as shaking of the anti-clogging chamber 1 or other situations that may cause hole alignment errors during installation. Then, the limiting ring 10 is placed on the outside of the threaded column 4 and enters the inside of the second limiting groove 8. The second limiting groove 8 provides lateral limiting for the limiting ring 10 and the threaded column 4, preventing the threaded column 4 from moving laterally. Then, the nut 11 is connected to securely fix the anti-clogging chamber 1 and the first fixed pipe 2. The limiting plate 6 and the limiting ring 10 distribute the pressure, further ensuring the uniformity of the connection force between the anti-clogging chamber 1 and the first fixed pipe 2, thus ensuring connection stability.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A wellhead plugging and blowout prevention device, comprising a plugging chamber (1), wherein a first fixing pipe (2) is provided on the bottom surface of the plugging chamber (1), characterized in that: It also includes a connecting component for auxiliary connection between the anti-blocking chamber (1) and the first fixed pipe (2). The connecting component is disposed on the outer circular wall of the first fixed pipe (2). The connecting component includes two connecting plates (3). Both connecting plates (3) are disposed on the outer circular wall of the first fixed pipe (2). Several threaded columns (4) are fixedly installed on the top surface of the connecting plate (3). The outer circular wall of the threaded column (4) is provided with a first limiting groove (5). The threaded column (4) is movably connected to the flange mounting hole of the first fixed pipe (2) and the flange mounting hole of the anti-blocking chamber (1). The outer circular wall of the anti-blocking chamber (1) is provided with two limiting plates (6). The top surface of the limiting plate (6) is provided with a fixing hole (7) and a limiting hole (9). The limiting hole (9) is movably connected to the first limiting groove (5). The first limiting groove (5) is movably connected to the limiting plate (6).

2. The wellhead sealing and blowout prevention device according to claim 1, characterized in that, The outer circular wall of the threaded column (4) is movably fitted with a limit ring (10), and the outer circular wall of the threaded column (4) is threaded with a nut (11).

3. The wellhead sealing and blowout prevention device according to claim 2, characterized in that, The top surface of the limiting plate (6) is provided with a plurality of second limiting grooves (8), and the second limiting grooves (8) are movably connected to the limiting ring (10).

4. The wellhead sealing and blowout prevention device according to claim 1, characterized in that, Several fixing plates (16) are fixedly installed on the outer circular wall surface of the limiting plate (6).

5. A wellhead plugging and blowout prevention device according to claim 1, characterized in that, The bottom surface of the anti-clogging chamber (1) is provided with several circular through holes. A hydraulic cylinder (12) is fixedly sleeved on the inner circular wall of the circular through holes. A second fixed pipe (13) is fixedly installed on the inner bottom surface of the anti-clogging chamber (1). A flexible sealing pipe (15) is fixedly sleeved on the outer circular wall of the second fixed pipe (13). The flexible sealing pipe (15) is fixedly installed on the inner top surface of the anti-clogging chamber (1). An annular actuating member (14) is movably sleeved on the outer circular wall of the second fixed pipe (13). The annular actuating member (14) is fixedly installed on the telescopic shaft of the hydraulic cylinder (12).

6. A wellhead sealing and blowout prevention device according to claim 5, characterized in that, The top inner wall of the annular actuator (14) is parallel to the bottom outer wall of the flexible sealing tube (15), which is made of rubber.

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