High-pressure protection type top drive inner blowout preventer

Abstract

The utility model belongs to the technical field of blowout preventers, and particularly relates to a high-pressure protection type top drive inner blowout preventer which comprises a blowout preventer body, threaded rods penetrate through the two sides of the blowout preventer body in a threaded mode, and driving rods are fixedly installed at the back ends of the two threaded rods. And screw caps penetrate through and are arranged at the back ends of the two driving rods, communicating blocks are rotatably mounted on the adjacent sides of the two screw caps, clamping blocks penetrate through and are slidably mounted on the inner walls of the four sides of the two communicating blocks, and guide rods are fixedly mounted on one sides of the eight clamping blocks and penetrate through the screw caps. By rotating the screw cap, the guide rod moves along the arc-shaped hole under the thrust of the screw cap, and meanwhile, the clamping blocks move along the sliding grooves, so that the distance between the clamping blocks is adjustable, the clamping blocks can be meshed with driving rods of different specifications, the adaptability is improved, the connecting frame is installed on the installing frame in an inserting mode and limited through the pin shaft, and the clamping blocks are not prone to falling off. And rapid disassembly and assembly are facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of blowout preventer technology, and in particular relates to a high-pressure protective top drive internal blowout preventer. Background Technology

[0002] High-pressure protected top drive internal blowout preventers are key safety devices in oil drilling top drive systems. They are mainly used to quickly seal the drill string borehole under high-pressure well control conditions to prevent fluids (such as oil, gas, and drilling fluid) from being ejected from the drill string, thus ensuring drilling safety. The main sealing types are ball valve type, gate valve type, and automatic activation type. For the gate valve type, the valve core is pushed by driving the valve stem. The valve core clamps the drilling tool and seals the gaps on all four sides to prevent fluid from being ejected.

[0003] However, due to the wide variety of blowout preventers (BOPs), the valve stem specifications also differ. Therefore, it is necessary to configure drive components of the same specifications for BOPs of different specifications. At the same time, the current drive components are generally fixed to the BOP with multiple bolts, making disassembly and maintenance inconvenient. In view of this, we propose a high-pressure protected top-drive internal BOP. Utility Model Content

[0004] The purpose of this invention is to provide a high-pressure protective top drive internal blowout preventer to solve the problems mentioned in the background art.

[0005] In view of this, the present invention provides a high-pressure protective top drive internal blowout preventer, including a blowout preventer body, threaded rods threadedly installed through both sides of the blowout preventer body, drive rods fixedly installed at opposite ends of the two threaded rods, caps threaded through and provided at opposite ends of the two drive rods, connecting blocks rotatably installed on adjacent sides of the two caps, clamping blocks slidably installed through the four inner walls of the two connecting blocks, guide rods fixedly installed on one side of the eight clamping blocks and penetrating the caps, and component housings rotatably installed through and on adjacent sides of the two connecting blocks.

[0006] A locking assembly is mounted on the arcuate sidewall of the cap and is used to restrict the rotation of the connecting block;

[0007] A drive assembly is mounted on both sides of the assembly housing and is used to drive the connecting block to rotate.

[0008] In the above technical solution, the locking assembly further includes two locking blocks, which are slidably installed on the inner sidewalls of the two caps respectively. The arc-shaped sidewalls of the two connecting blocks are provided with multiple slots that can engage with the locking blocks. Threaded posts are fixedly installed on the other side of the two locking blocks, and threaded sleeves are threadedly installed at the other end of the two threaded posts. The two threaded sleeves pass through and are rotatably connected to the two caps respectively.

[0009] In the above technical solution, the driving component further includes two first gears, which are respectively fixedly installed on the side walls of two connecting blocks. Motors are fixedly installed on the opposite sides of the housings of the two components. The output ends of the two motors pass through the housings of the two components. Second gears are fixedly installed on the output ends of the two motors. The two second gears mesh with the two first gears respectively.

[0010] In the above technical solution, furthermore, mounting brackets are fixedly installed on both outer walls of the blowout preventer body, and connecting brackets are slidably installed on one end of each of the two component housings. The two connecting brackets are respectively inserted into the two mounting brackets, and pin holes are opened at the intersection of the two connecting brackets and the mounting brackets, and the connecting brackets and the mounting brackets are limited by pin shafts.

[0011] In the above technical solution, both of the clamping blocks are V-shaped, and the four sides of the two driving rods are provided with V-shaped long grooves, which respectively engage with eight clamping blocks.

[0012] In the above technical solution, furthermore, valve stems are rotatably mounted on adjacent ends of the two threaded rods and are slidably connected to the blowout preventer body, and valve cores are fixedly mounted on adjacent ends of the two valve stems.

[0013] In the above technical solution, furthermore, the inner walls of the four sides of the two connecting blocks are provided with sliding grooves, the eight clamping blocks are respectively installed in the eight sliding grooves, the side walls of the two screw caps are provided with four arc-shaped holes distributed at equal angles, and the eight guide rods are respectively movably connected to the eight arc-shaped holes.

[0014] The beneficial effects of this utility model are:

[0015] This high-pressure protective top-drive internal blowout preventer uses a rotating cap to move the guide rod along the arc-shaped hole under the thrust of the cap. At the same time, the clamping blocks move along the slide groove, making the spacing between the clamping blocks adjustable. This allows it to mesh with drive rods of different specifications, improving adaptability. The connecting bracket is installed on the mounting bracket by plugging it in and is limited by a pin, facilitating quick assembly and disassembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the driving component in this utility model;

[0018] Figure 3 This is an exploded view of the drive component in this utility model;

[0019] Figure 4 This is a cross-sectional view of the screw cap in this utility model;

[0020] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle;

[0021] Figure 6 This is a cross-sectional view of the main body of the blowout preventer in this utility model.

[0022] The markings in the diagram are as follows:

[0023] 1. Component housing; 2. First gear; 3. Slot; 4. Connecting block; 5. Clamping block; 6. Screw cap; 7. Motor; 8. Second gear; 9. Connecting frame; 10. Arc-shaped hole; 11. Drive rod; 12. Slide groove; 13. Valve stem; 14. Threaded rod; 15. Threaded sleeve; 16. Threaded post; 17. Clamping block; 18. Mounting bracket; 19. Blowout preventer body; 20. Guide rod. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0026] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples. Example

[0029] Please see Figure 1-6As shown in the figure, this embodiment provides a high-pressure protective top drive internal blowout preventer, including a blowout preventer body 19. Threaded rods 14 are threaded through and threaded onto both sides of the blowout preventer body 19. Drive rods 11 are fixedly installed at opposite ends of the two threaded rods 14. A cap 6 is provided at opposite ends of the two drive rods 11. A connecting block 4 is rotatably installed on adjacent sides of the two caps 6. Clamping blocks 5 are slidably installed through the four inner walls of the two connecting blocks 4. Guide rods 20 are fixedly installed on one side of each of the eight clamping blocks 5 and pass through the caps 6. A component housing 1 is rotatably installed through the adjacent sides of the two connecting blocks 4.

[0030] A locking assembly is mounted on the arc-shaped sidewall of the cap 6 and is used to restrict the rotation of the connecting block 4;

[0031] The drive assembly is mounted on both sides of the assembly housing 1 and is used to drive the connecting block 4 to rotate.

[0032] In this process, by rotating the cap 6 to one side, the guide rod 20 moves along the arc-shaped hole 10 under the thrust of the cap 6. At the same time, the clamping block 5 moves along the slide groove 12 until it engages with the "V"-shaped groove on the drive rod 11. By driving the rotation of the connecting block 4, the drive rod 11 can be rotated. Example

[0033] This embodiment provides a high-pressure protective top-drive internal blowout preventer. In addition to the technical solutions of the above embodiments, it also has the following technical features: the locking assembly includes two locking blocks 17, which are slidably installed on the inner sidewalls of the two caps 6 respectively. The arc-shaped sidewalls of the two connecting blocks 4 are provided with multiple slots 3, which can engage with the locking blocks 17. Threaded posts 16 are fixedly installed on the other side of the two locking blocks 17. Threaded sleeves 15 are threadedly installed at the other end of the two threaded posts 16. The two threaded sleeves 15 pass through and are rotatably connected to the two caps 6 respectively.

[0034] In this process, by rotating the threaded sleeve 15, the threaded post 16 is made to pass through the inner wall of the threaded sleeve 15 and push the locking block 17 to engage with the locking groove 3 on the connecting block 4, thereby restricting the rotation of the connecting block 4. Example

[0035] This embodiment provides a high-pressure protective top-drive internal blowout preventer. In addition to the technical solution of the above embodiment, it also has the following technical features: the drive component includes two first gears 2, which are respectively fixedly installed on the side walls of two connecting blocks 4. Motors 7 are fixedly installed on the opposite side of the two component housings 1. The output ends of the two motors 7 pass through the two component housings 1 respectively. The output ends of the two motors 7 are fixedly installed on the two second gears 8 respectively. The two second gears 8 mesh with the two first gears 2 respectively.

[0036] Specifically, by starting the motor 7 and driving the second gear 8 and the first gear 2 through meshing, the connecting block 4 and the clamping block 5 are driven to rotate together, causing the drive rod 11 to start rotating, and then the threaded rod 14 is driven to rotate through the drive rod 11. Example

[0037] This embodiment provides a high-pressure protected top drive internal blowout preventer. In addition to the technical solutions of the above embodiments, it also has the following technical features: mounting brackets 18 are fixedly installed on both outer walls of the blowout preventer body 19, and connecting brackets 9 are slidably installed on one end of the two component housings 1. The two connecting brackets 9 are respectively inserted into the two mounting brackets 18. Pin holes are opened at the intersection of the two connecting brackets 9 and the mounting brackets 18, and the connecting brackets 9 and the mounting brackets 18 are limited by pin shafts.

[0038] The connector 9 is installed onto the mounting bracket 18 via a plug-in connection, facilitating quick installation and removal. Example

[0039] This embodiment provides a high-pressure protective top drive internal blowout preventer. In addition to the technical solution of the above embodiment, it also has the following technical features: both locking blocks 17 are "V" shaped, and the four sides of the two drive rods 11 are provided with "V" shaped long grooves, which respectively engage with eight clamping blocks 5.

[0040] Among them, the slot 3 is "V" shaped, and the adjacent slots 3 are connected end to end, which facilitates the engagement of the card block 17. Example

[0041] This embodiment provides a high-pressure protected top drive internal blowout preventer. In addition to the technical solutions of the above embodiments, it also has the following technical features: valve stems 13 are rotatably installed at adjacent ends of the two threaded rods 14 and are slidably connected to the blowout preventer body 19; valve cores are fixedly installed at adjacent ends of the two valve stems 13.

[0042] The design incorporates large through holes to facilitate the insertion of drive rods 11 of different specifications. Each of the two valve cores has a semi-circular arc surface on one side, and the circle formed by the two arc surfaces is the same as the outer diameter of the drilling tool. Example

[0043] This embodiment provides a high-pressure protective top drive internal blowout preventer. In addition to the technical solution of the above embodiment, it also has the following technical features: the inner walls of the two connecting blocks 4 are provided with sliding grooves 12, the eight clamping blocks 5 are respectively installed in the eight sliding grooves 12, the side walls of the two caps 6 are provided with four arc-shaped holes 10 distributed at equal angles, and the eight guide rods 20 are respectively movably connected to the eight arc-shaped holes 10.

[0044] The movement trajectory of the clamping block 5 can be restricted by the slide groove 12.

[0045] Working principle: The drive rod 11 passes through the gap between the clamping blocks 5. During the passage, the connecting bracket 9 and the mounting bracket 18 are inserted together and limited by a pin. Then, by rotating the cap 6 to one side, the guide rod 20 moves along the arc-shaped hole 10 under the thrust of the cap 6. At the same time, the clamping block 5 moves along the slide groove 12 until it engages with the "V"-shaped groove on the drive rod 11. Then, by rotating the threaded sleeve 15, the threaded post 16 passes through the inner wall of the threaded sleeve 15 and pushes the locking block 17 to engage with the locking groove 3 on the connecting block 4, thereby restricting the rotation of the connecting block 4. When it is necessary to block the internal pipes of the blowout preventer body 19, the clamping blocks 5 respectively lock the four sides of the drive rod 11, and then the motor 7 is started and... The meshing transmission of the second gear 8 and the first gear 2 drives the connecting block 4 and the clamping block 5 to rotate together, causing the drive rod 11 to start rotating. Then, the drive rod 11 drives the threaded rod 14 to rotate. At the same time, the threaded rod 14 pushes the valve core at the other end of the valve rod 13 to clamp the side wall of the drilling tool. The two valve cores clamp the two sides of the drilling tool respectively, sealing the gap between the drilling tool and the blowout preventer body 19. During the movement of the threaded rod 14 and the drive rod 11, the clamping block 5 can slide along the surface of the drive rod 11. After the sealing is completed, the locking block 17 is separated from the locking groove 3 by rotating the threaded sleeve 15 in the opposite direction. Then, the pin of the limiting connecting frame 9 is pulled out, and then the component housing 1 is pulled to one side to quickly remove it.

[0046] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A high-pressure protected top-drive internal blowout preventer, characterized in that, include: The blowout preventer body (19) has threaded rods (14) threaded through and threaded on both sides. Drive rods (11) are fixedly installed on the opposite ends of the two threaded rods (14). A cap (6) is provided through the opposite ends of the two drive rods (11). A connecting block (4) is rotatably installed on the adjacent side of the two caps (6). Clamping blocks (5) are slidably installed through the four inner walls of the two connecting blocks (4). A guide rod (20) is fixedly installed on one side of each of the eight clamping blocks (5) and passes through the cap (6). A component housing (1) is rotatably installed through the adjacent side of the two connecting blocks (4). A locking assembly is mounted on the arcuate sidewall of the cap (6) and is used to restrict the rotation of the connecting block (4); A drive assembly is mounted on both sides of the assembly housing (1) and is used to drive the connecting block (4) to rotate.

2. The high-pressure protected top-drive internal blowout preventer according to claim 1, characterized in that, The locking assembly includes two locking blocks (17), which are slidably mounted on the inner sidewalls of the two caps (6). The arc-shaped sidewalls of the two connecting blocks (4) are provided with multiple slots (3) that can engage with the locking blocks (17). Threaded posts (16) are fixedly mounted on the other side of the two locking blocks (17). Threaded sleeves (15) are threaded onto the other end of the two threaded posts (16). The two threaded sleeves (15) pass through and are rotatably connected to the two caps (6).

3. A high-pressure protected top-drive internal blowout preventer according to claim 1, characterized in that, The drive assembly includes two first gears (2), which are fixedly mounted on the side walls of two connecting blocks (4). Motors (7) are fixedly mounted on the opposite side of the two assembly housings (1). The output ends of the two motors (7) pass through the two assembly housings (1). Second gears (8) are fixedly mounted on the output ends of the two motors (7). The two second gears (8) mesh with the two first gears (2).

4. A high-pressure protected top-drive internal blowout preventer according to claim 1, characterized in that, The blowout preventer body (19) has mounting brackets (18) fixedly installed on both outer walls. One end of each of the two component housings (1) is slidably mounted with a connecting bracket (9). The two connecting brackets (9) are respectively inserted into the two mounting brackets (18). The two connecting brackets (9) and the mounting brackets (18) are provided with pin holes at the intersection of the two connecting brackets (9) and the mounting brackets (18), and the connecting brackets (9) and the mounting brackets (18) are limited by pin shafts.

5. A high-pressure protected top-drive internal blowout preventer according to claim 2, characterized in that, Both of the aforementioned clamps (17) are V-shaped, and the four sides of the two aforementioned drive rods (11) are provided with V-shaped long slots, which respectively engage with eight clamps (5).

6. A high-pressure protected top-drive internal blowout preventer according to claim 1, characterized in that, Each of the two threaded rods (14) has a valve stem (13) rotatably mounted on one adjacent end and is slidably connected to the blowout preventer body (19). Each of the two valve stems (13) has a valve core fixedly mounted on one adjacent end.

7. A high-pressure protected top-drive internal blowout preventer according to claim 1, characterized in that, The inner walls of the two connecting blocks (4) are provided with sliding grooves (12), and the eight clamping blocks (5) are respectively installed in the eight sliding grooves (12). The side walls of the two screw caps (6) are provided with four arc-shaped holes (10) distributed at equal angles, and the eight guide rods (20) are respectively movably connected to the eight arc-shaped holes (10).

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