A blowout preventer for oilfield drilling and workover

Abstract

This utility model relates to the field of well workover technology and discloses a blowout preventer (BOP) for oilfield drilling and workover, comprising a BOP body, a hollow tube fixedly connected to the surface of the BOP body, an installation device provided on the inner surface of the hollow tube, the installation device including a fixing tube slidably connected to the inner surface of the hollow tube, two mounting grooves formed on the arc surface of the fixing tube, a first spring fixedly connected to the inner surface of the mounting groove, a blocking block fixedly connected to the other end of the first spring, and two threaded rods threadedly inserted into the arc surface of the hollow tube, one end of the threaded rods fixedly connected to a round block. This BOP for oilfield drilling and workover avoids the complex operation required by workers during installation, which necessitates a significant amount of time for assembly, leading to delays in the overall project progress. The complex installation operation also avoids the problem of workers needing to maintain a specific posture for extended periods, resulting in physical fatigue.

Description

Technical Field

[0001] This utility model relates to the field of well workover technology, and in particular to a blowout preventer for oilfield drilling and workover. Background Technology

[0002] During well drilling and workover operations in oil fields, the pressure changes within the well are extremely complex. Once the pressure becomes uncontrolled, it can easily lead to a blowout. A blowout not only wastes a large amount of oil and gas resources but also causes serious pollution to the surrounding ecological environment. More seriously, it poses a huge threat to the lives of on-site personnel. Traditional blowout preventers (BOPs) have many shortcomings and deficiencies in dealing with blowouts. For example, the installation and operation procedures of some BOPs are cumbersome and complex, making it difficult for operators to operate quickly and accurately in emergencies, which greatly delays the best rescue opportunity. In addition, after long-term use, some existing BOPs are prone to wear and aging of key components, which not only reduces the performance of the BOP but also requires frequent maintenance and replacement of parts, thereby increasing operating costs and time. Therefore, it is necessary to develop a technology that can effectively overcome the above problems.

[0003] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: blowout preventers require a lot of time to assemble, which leads to delays in the overall project progress; the complex installation operation requires workers to maintain a specific posture for a long time, which can easily cause physical fatigue and discomfort to the workers. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing technology has the disadvantages of blowout preventers requiring a lot of time to assemble, which leads to the overall project progress being delayed. The complex installation operation requires the workers to maintain a specific posture for a long time, which easily causes physical fatigue and discomfort to the workers. Therefore, we propose a blowout preventer for oilfield drilling and well workover.

[0005] To achieve the above objectives, this application adopts the following technical solution: a blowout preventer for oilfield drilling and workover, comprising a blowout preventer body, a hollow tube fixedly connected to the surface of the blowout preventer body, an installation device provided on the inner surface of the hollow tube, the installation device comprising a fixing tube, the fixing tube being slidably connected to the inner surface of the hollow tube, two mounting grooves being formed on the arc surface of the fixing tube, a first spring being fixedly connected to the inner surface of the mounting groove, a blocking block being fixedly connected to the other end of the first spring, two threaded rods being threadedly inserted into the arc surface of the hollow tube, a circular block being fixedly connected to one end of the threaded rods, and two circular grooves being formed on the inner surface of the fixing tube.

[0006] Preferably, one end of the fixing tube is slidably connected to a leak-proof pad, the size of which is adapted to the size of the fixing tube.

[0007] Preferably, a round rod is slidably connected to the inner surface of the circular groove, a movable frame is slidably connected to the arc surfaces of the two round rods, a handle is fixedly connected to the arc surfaces of the round rods, and a second spring is fixedly connected to one end of the two round rods that is close to each other.

[0008] Preferably, a baffle is fixedly connected to the arc surface of the threaded rod, and one side of the baffle abuts against the hollow tube.

[0009] Preferably, a hollow steel plate is fixedly connected to the arc surface of the fixed tube, and six screws are threaded into the inner surface of the hollow steel plate, with a ring fixedly connected to one end of each of the six screws.

[0010] Preferably, the surface of the blowout preventer body is provided with a protective device, the protective device including two mounting brackets, both mounting brackets being fixedly connected to the surface of the blowout preventer body, two side plates being fixedly connected to the surface of the blowout preventer body, inclined plates being fixedly connected to the surfaces of the two mounting brackets, a drive rod being rotatably mounted on the inner surface of the two mounting brackets, and a rear plate being fixedly connected to the arc surface of the drive rod.

[0011] Preferably, both ends of the drive rod are fixedly connected to blocks, and the surfaces of the two mounting frames are fixedly connected to limit rods, with the arc surface of the limit rods rotatably connected to limit plates.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] In this utility model, by setting up an installation device, the blowout preventer can be installed by workers in a way that is convenient and avoids the complicated operation required by workers during installation. The complicated installation operation requires workers to maintain a specific posture for a long time, which can easily lead to physical fatigue and discomfort. The installation mechanism enhances the enthusiasm of employees.

[0014] In this invention, by setting up a protective device, the blowout preventer is protected, avoiding rust and leakage. The protective structure reduces rainwater accumulation, slows down the internal equipment from getting damp and rusting, and slows down aging and corrosion. Attached Figure Description

[0015] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

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

[0018] Figure 3 This is a cross-sectional view of the fixing tube in this utility model;

[0019] Figure 4 This is a schematic diagram of the protective device in this utility model;

[0020] Figure 5 In this utility model Figure 4 Enlarged view of point A.

[0021] Legend: 1. Blowout preventer body; 2. Hollow tube; 3. Mounting device; 301. Fixing tube; 302. Mounting groove; 303. First spring; 304. Block; 305. Threaded rod; 306. Round block; 307. Round groove; 308. Leak-proof pad; 309. Round rod; 310. Movable frame; 311. Handle; 312. Second spring; 313. Baffle; 314. Hollow steel plate; 315. Screw; 316. Ring; 4. Protective device; 41. Mounting frame; 42. Side plate; 43. Inclined plate; 44. Drive rod; 45. Rear plate; 46. Block; 47. Limiting rod; 48. Limiting plate. Detailed Implementation

[0022] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0023] Reference Figure 1As shown, this utility model provides a technical solution: a blowout preventer (BOP) for oilfield drilling and workover, comprising a BOP body 1, a hollow tube 2 fixedly connected to the surface of the BOP body 1, and an installation device 3 on the inner surface of the hollow tube 2. The installation device 3 facilitates the installation of the BOP by workers, avoiding complex installation operations that would otherwise require significant time for assembly, leading to delays in the overall project. Complex installation operations also require workers to maintain a specific posture for extended periods, easily causing fatigue and discomfort. This installation mechanism enhances worker motivation. A protective device 4 is provided on the surface of the BOP body 1, protecting the BOP and preventing rust and leaks. Without this protective structure, rainwater can easily accumulate, causing internal components to become damp and rusty, reducing performance. Furthermore, during heavy rain, rainwater can penetrate these components, and external impacts, sun exposure, and rain will accelerate aging and corrosion, shortening their service life.

[0024] The specific setup and function of the installation device 3 and the protective device 4 will be described in detail below.

[0025] Reference Figure 2 and Figure 3As shown in this embodiment: the installation device 3 includes a fixed pipe 301, which is slidably connected to the inner surface of the hollow pipe 2. Two mounting grooves 302 are formed on the arc surface of the fixed pipe 301. A first spring 303 is fixedly connected to the inner surface of the mounting grooves 302, and a blocking block 304 is fixedly connected to the other end of the first spring 303. Two threaded rods 305 are threadedly inserted into the arc surface of the hollow pipe 2. A circular block 306 is fixedly connected to one end of each threaded rod 305. Two circular grooves 307 are formed on the inner surface of the fixed pipe 301. A leak-proof gasket 308 is slidably connected to one end of the fixed pipe 301, and the size of the leak-proof gasket 308 is adapted to the size of the fixed pipe 301. In a pipeline system for transporting crude oil, this enhances the sealing between the fixed pipe 301 and the hollow pipe 2, preventing crude oil leakage. A circular rod 309 is slidably connected to the inner surface of the circular groove 307. A movable frame 310 is slidably connected to the arc surfaces of two circular rods 309. A handle 311 is fixedly connected to the arc surfaces of the circular rods 309. A second spring 312 is fixedly connected to the ends of the two circular rods 309 that are close to each other. This limits the position of the leak-proof pad 308, preventing it from falling off after installation. A baffle 313 is fixedly connected to the arc surface of the threaded rod 305, with one side of the baffle 313 abutting against the hollow tube 2. By setting the baffle 313, when one side of the baffle 313 abuts against the arc surface of the hollow tube 2, the top of the blocking block 304 is flush with one side of the arc surface of the fixed tube 301, making it easier for workers to disassemble the hollow tube 2 and preventing the threaded rod 305 from rotating too much and inserting into the mounting groove 302, which would hinder disassembly. A hollow steel plate 314 is fixedly connected to the arc surface of the fixed tube 301. Six screws 315 are threaded into the inner surface of the hollow steel plate 314, and a ring 316 is fixedly connected to one end of each screw 315. The six screws 315 are connected by the ring 316, allowing for direct assembly or disassembly of the six screws 315.

[0026] Reference Figure 4 and Figure 5 As shown, specifically, the protective device 4 includes two mounting brackets 41, both of which are fixedly connected to the surface of the blowout preventer body 1. Two side plates 42 are fixedly connected to the surface of the blowout preventer body 1. Inclined plates 43 are fixedly connected to the surfaces of the two mounting brackets 41. A drive rod 44 is rotatably mounted on the inner surface of each mounting bracket 41, and a rear plate 45 is fixedly connected to the arc surface of the drive rod 44. Blocks 46 are fixedly connected to both ends of the drive rod 44. Limiting rods 47 are fixedly connected to the surfaces of both mounting brackets 41, and a limiting plate 48 is rotatably connected to the arc surface of the limiting rod 47. By setting the blocks 46 and the limiting plate 48, the angle of the rear plate 45 is limited after rotation.

[0027] Working principle: When the operator needs to use the installation device 3 to install the hollow tube 2 and the fixed tube 301, first place the leak-proof pad 308 at one end of the fixed tube 301, press the leak-proof pad 308 by hand until the fixed tube 301 and the leak-proof pad 308 are tightly fitted, then press the handle 311 to compress the second spring 312 to slide on the inner surface of the movable frame 310, then place the movable frame 310 between the two circular grooves 307, release the handle 311 and the second spring 312 to spring the circular rod 309 to the inner surface of the circular groove 307, thereby limiting the leak-proof pad 308 and preventing it from falling off. Rotating the circular block 306 drives the threaded rod 305 to rotate within the threaded hole of the hollow tube 2 until the baffle 313 is a certain distance from the hollow tube 2. Then, the surface of the fixed tube 301 slides forward along the surface of the hollow tube 2, pressing the blocking block 304 downward, thereby compressing the first spring 303 within the mounting groove 302. When the blocking block 304 springs into the threaded hole of the hollow tube 2, it limits the fixed tube 301. Subsequently, the sliding ring 316 drives the six screws 315, causing the screws 315 to rotate to the inner surface of the hollow steel plate 314, further limiting the blowout preventer body 1, thus installing the blowout preventer body 1.

[0028] When the staff needs to use the protective device 4 to protect the blowout preventer body 1, firstly, the rear plate 45 is rotated to drive the drive rod 44 to rotate on the inner surface of the two mounting brackets 41. The block 46 rotates with the drive rod 44. When it rotates to the appropriate position, under the support of the mounting brackets 41, the limiting plate 48 rotates on the arc surface of the limiting rod 47. When the square hole of the limiting plate 48 is aligned with the surface of the block 46, the limiting plate 48 is slid to allow the block 46 to enter the square hole of the limiting plate 48, limiting the drive rod 44 and the rear plate 45. Together with the inclined plate 43 and the side plate 42, the blowout preventer body 1 is protected.

[0029] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A blowout preventer for oilfield drilling and workover, characterized in that, The device includes a blowout preventer body (1), a hollow tube (2) is fixedly connected to the surface of the blowout preventer body (1), an installation device (3) is provided on the inner surface of the hollow tube (2), the installation device (3) includes a fixing tube (301), the fixing tube (301) is slidably connected to the inner surface of the hollow tube (2), the arc surface of the fixing tube (301) has two installation grooves (302), the inner surface of the installation groove (302) is fixedly connected to a first spring (303), the other end of the first spring (303) is fixedly connected to a blocking block (304), the arc surface of the hollow tube (2) is threaded with two threaded rods (305), one end of the threaded rods (305) is fixedly connected to a round block (306), and the inner surface of the fixing tube (301) has two round grooves (307).

2. The blowout preventer for oilfield drilling and workover as described in claim 1, characterized in that: One end of the fixed tube (301) is slidably connected to a leak-proof pad (308), the size of which is adapted to the size of the fixed tube (301).

3. The blowout preventer for oilfield drilling and workover as described in claim 1, characterized in that: A round rod (309) is slidably connected to the inner surface of the circular groove (307), and a movable frame (310) is slidably connected to the arc surfaces of the two round rods (309). A handle (311) is fixedly connected to the arc surfaces of the round rods (309), and a second spring (312) is fixedly connected to one end of the two round rods (309) that is close to each other.

4. The blowout preventer for oilfield drilling and workover as described in claim 1, characterized in that: A baffle (313) is fixedly connected to the arc surface of the threaded rod (305), and one side of the baffle (313) abuts against the hollow tube (2).

5. A blowout preventer for oilfield drilling and workover as described in claim 1, characterized in that: The arc surface of the fixed tube (301) is fixedly connected to a hollow steel plate (314), and six screws (315) are threadedly inserted into the inner surface of the hollow steel plate (314). One end of the six screws (315) is fixedly connected to a ring (316).

6. A blowout preventer for oilfield drilling and workover as described in claim 1, characterized in that: The surface of the blowout preventer body (1) is provided with a protective device (4). The protective device (4) includes two mounting brackets (41). Both mounting brackets (41) are fixedly connected to the surface of the blowout preventer body (1). Two side plates (42) are fixedly connected to the surface of the blowout preventer body (1). Inclined plates (43) are fixedly connected to the surface of the two mounting brackets (41). A drive rod (44) is rotatably connected to the inner surface of the two mounting brackets (41). A rear plate (45) is fixedly connected to the arc surface of the drive rod (44).

7. A blowout preventer for oilfield drilling and workover as described in claim 6, characterized in that: Both ends of the drive rod (44) are fixedly connected to blocks (46), and the surfaces of the two mounting frames (41) are fixedly connected to limit rods (47). The arc surface of the limit rods (47) is rotatably connected to a limit plate (48).

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