Self-sealing type blowout preventer

Abstract

The utility model discloses a self-sealing type blowout preventer which comprises a self-sealing type blowout preventer body, and the self-sealing type blowout preventer body comprises a blowout preventer body, a pipe body, a polish rod, an outer spring and a lubricating grease cylinder. The moving assembly comprises an annular clamping groove, a supporting column, a supporting plate, a spring column and an arc-shaped clamping block, the annular clamping groove is formed in the end, away from the blowout preventer body, of the inner side of the pipe body, the supporting column is inserted into the inner side of the pipe body, the supporting plate is fixed to the middle of the end, away from the blowout preventer body, of the supporting column, and one end of the spring column is fixed to the side edge of the supporting plate; the inner sides of the arc-shaped clamping blocks are fixed to the other ends of the spring columns, and the outer sides of the arc-shaped clamping blocks are attached to the inner wall of the pipe body. By means of the moving assembly, the first pressing plate is pinched to enable the clamping teeth on the arc-shaped clamping block to be separated from the annular clamping groove so as to move the supporting column, meanwhile, the spring column is matched to enable the clamping teeth on the arc-shaped clamping block to be clamped into the annular clamping groove so as to adjust the position of the outer spring, operation is convenient, and the position of the outer spring can be easily adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of blowout preventer, concretely is a self sealing blowout preventer. BACKGROUND

[0002] The self sealing blowout preventer is a kind of safety equipment for the operation of oil drilling, well completion and well repair, mainly used to automatically close wellhead in emergency (such as drill pipe fracture, wellhead out of control), prevent high-pressure fluid (such as oil and gas, water) in well from spouting, and protect the safety of operating personnel and environment. Its core feature is that it does not need external power drive, and realizes rapid sealing by relying on internal mechanical structure or material characteristics.

[0003] The present application searches for China patent new type two-stage lubricating self sealing blowout preventer, public number CN204532224 U, including blowout preventer body, polished rod passes through the vertical through hole of blowout preventer body, a pipe body is arranged in blowout preventer body and is horizontally sleeved, a lubricating grease cartridge is fixedly arranged on the inner side of pipe body, one end of lubricating grease cartridge is closed, and the other end is open, oil outlet holes are evenly arranged on the closed end face, the closed end is close to polished rod, a piston is slidably arranged in the other end of lubricating grease cartridge, the back surface of piston and the open end face of lubricating grease cartridge are respectively abutted with the inner spring and the outer spring, the inner spring is sleeved in the outer spring, the outer side end of outer spring is abutted with the rotating plug provided on the outer side end of pipe body, the outer side end of inner spring is abutted with the inner rotating plug, and the inner rotating plug is coaxially installed in the central hole of rotating plug through threaded connection.

[0004] The existing lubricating grease cartridge is connected to the outer rotating plug by spring, and the outer rotating plug is screwed on the pipe body. Since the environment of blowout preventer is relatively harsh, the screwing structure of outer rotating plug is relatively troublesome to rotate after long-term use. Therefore, a self sealing blowout preventer is needed to solve the above problems. SUMMARY

[0005] The utility model aims at providing a kind of self sealing blowout preventer to solve the problems raised in the above background art. To solve the above technical problems, the utility model is realized by the following technical scheme:

[0006] The utility model is a kind of self sealing blowout preventer, comprising:

[0007] The self sealing blowout preventer includes blowout preventer body, pipe body, polished rod, outer spring and lubricating grease cartridge, the pipe body is welded in the side of blowout preventer body, and is communicated with blowout preventer body, the polished rod is inserted in the vertical through hole of blowout preventer body, the outer spring is fixed in the side of lubricating grease cartridge, and the other end of lubricating grease cartridge, away from outer spring, is attached to the outer side wall of polished rod.

[0008] The movable component includes an annular groove, a support column, a support plate, a spring column, and an arc-shaped locking block. The annular groove is located on the inner side of the tube body away from the blowout preventer body, extending to the middle of the tube body. The support column is inserted into the inner side of the tube body. The support plate is fixed to the middle of the end of the support column away from the blowout preventer body. One end of the spring column is fixed to the side of the support plate. The inner side of the arc-shaped locking block is fixed to the other end of the spring column, and the outer side of the arc-shaped locking block is attached to the inner wall of the tube body.

[0009] Furthermore, the moving component also includes a first pressure plate, which is fixed to the end of the arc-shaped block away from the blowout preventer body.

[0010] Furthermore, the outer side of the arc-shaped card block is formed with arc-shaped teeth in one piece, and the arc-shaped teeth are engaged in the annular slot.

[0011] Furthermore, the self-sealing blowout preventer also includes an inner spring and a piston. The inner spring is located inside the outer spring, with one end fixed to the side of the support column and the other end fixed to the side of the piston. The piston is movably connected inside the grease cylinder.

[0012] Furthermore, it also includes a protective component, which includes a support bar, a movable groove, a limiting groove, a movable block, a support rod, and a limiting post. The support bar is fixed to the outer side of the tube body, the movable groove is opened on the side of the support bar, the limiting groove is opened on one side of the movable groove, the movable block is inserted into the movable groove, the support rod is fixed between the two movable blocks, and the limiting post is fixed to the side of the support rod.

[0013] Furthermore, the protective assembly also includes a compression spring and a second pressure plate, with one end of the compression spring fixed to the other end of the movable groove away from the limiting groove, and the second pressure plate fixed to the other end of the compression spring.

[0014] Furthermore, the support rod is inserted into the limiting groove, and the second pressure plate presses against the side of the movable block.

[0015] This utility model has the following beneficial effects:

[0016] This invention, through its movable component, allows for easy adjustment of the outer spring position when the first pressure plate is held by both hands. This brings the two pressure plates closer together, causing the two arc-shaped locking blocks to move closer together. The locking teeth on the arc-shaped locking blocks disengage from the annular locking grooves. Subsequently, the first pressure plates are moved, causing the support plate and support column to move, thereby compressing or extending the outer spring. When the spring reaches the appropriate position, the first pressure plates are released, the movable end of the spring column extends, and the locking teeth on the arc-shaped locking blocks engage with the annular locking grooves. This design is simple in structure, convenient in operation, and allows for easy adjustment of the outer spring position. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram showing the position of the annular slot of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the mobile component of this utility model;

[0021] Figure 4 This is a schematic diagram of the support strip structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the support rod and limiting column structure of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 10. Blowout preventer body; 11. Tube body; 12. Polished rod; 13. Outer spring; 14. Grease canister; 15. Inner spring; 16. Piston; 20. Annular groove; 21. Support column; 22. Support plate; 23. Spring column; 24. Arc-shaped locking block; 25. First pressure plate; 30. Support bar; 31. Movable groove; 32. Limiting groove; 33. Compression spring; 34. Second pressure plate; 35. Movable block; 36. Support rod; 37. Limiting column. Detailed Implementation

[0025] 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.

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0027] Please see Figures 1-3 As shown, this utility model is a self-sealing blowout preventer, comprising:

[0028] The self-sealing blowout preventer includes a blowout preventer body 10, a tube 11, a polished rod 12, an outer spring 13, and a grease cylinder 14. The tube 11 is welded to the side of the blowout preventer body 10 and communicates with the blowout preventer body 10. The polished rod 12 is inserted into the vertical through hole of the blowout preventer body 10. One end of the outer spring 13 is fixed to the side of the grease cylinder 14, and the other end of the grease cylinder 14 away from the outer spring 13 is attached to the outer wall of the polished rod 12.

[0029] The self-sealing blowout preventer also includes an inner spring 15 and a piston 16. The inner spring 15 is located inside the outer spring 13, with one end fixed to the side of the support column 21 and the other end fixed to the side of the piston 16. The piston 16 is movably connected inside the grease cylinder 14.

[0030] The blowout preventer body 10 provides support, the tube body 11 provides connection, the polished rod 12 is a key transmission component of the pumping system, the outer spring 13 and the inner spring 15 have telescopic functions, the grease cylinder 14 can seal the through hole in the blowout preventer body 10 when the polished rod 12 breaks, the grease cylinder 14 has a hole at one end attached to the polished rod 12 to facilitate the outflow of internal grease, the piston 16 provides a sealing function and can push the grease in the grease cylinder 14 to move.

[0031] The movable component includes an annular groove 20, a support column 21, a support plate 22, a spring column 23, and an arc-shaped locking block 24. The annular groove 20 is opened on the inner side of the tube body 11 away from the blowout preventer body 10, extending to the middle of the tube body 11. The support column 21 is inserted into the inner side of the tube body 11. The support plate 22 is fixed to the middle of the end of the support column 21 away from the blowout preventer body 10. One end of the spring column 23 is fixed to the side of the support plate 22. The inner side of the arc-shaped locking block 24 is fixed to the other end of the spring column 23, and the outer side of the arc-shaped locking block 24 is attached to the inner wall of the tube body 11.

[0032] The moving component also includes a first pressure plate 25, which is fixed to the end of the arc-shaped block 24 away from the blowout preventer body 10;

[0033] The outer side of the arc-shaped locking block 24 is formed in one piece with arc-shaped locking teeth, and the arc-shaped locking teeth are engaged in the annular locking groove 20;

[0034] The annular groove 20 serves as a limit, the support column 21 and the support plate 22 serve as supports, the spring column 23 has a telescopic function, the arc-shaped block 24 serves as a limit, and the first pressure plate 25 facilitates hand operation of the arc-shaped block 24.

[0035] Working principle:

[0036] When the position of the outer spring 13 needs to be adjusted, hold the first pressure plate 25 with both hands to bring the two first pressure plates 25 together, which will cause the two arc-shaped locking blocks 24 to move together. The locking teeth on the arc-shaped locking blocks 24 will disengage from the annular locking groove 20. Then move the first pressure plate 25 to move the support plate 22 and the support column 21, thereby compressing or extending the outer spring 13. When it is moved to the appropriate position, release the first pressure plate 25, the movable end of the spring column 23 will extend, and the locking teeth on the arc-shaped locking blocks 24 will engage with the annular locking groove 20.

[0037] This step is simple in structure and easy to operate, and the position of the outer spring 13 can be easily adjusted.

[0038] Please see Figures 4-5 As shown, this embodiment, based on the above embodiment, further includes:

[0039] The protective assembly includes a support bar 30, a movable groove 31, a limiting groove 32, a movable block 35, a support rod 36, and a limiting post 37. The support bar 30 is fixed to the outer side of the tube body 11, the movable groove 31 is opened on the side of the support bar 30, the limiting groove 32 is opened on one side of the movable groove 31, the movable block 35 is inserted into the movable groove 31, the support rod 36 is fixed between the two movable blocks 35, and the limiting post 37 is fixed to the side of the support rod 36.

[0040] The protective assembly also includes a compression spring 33 and a second pressure plate 34. One end of the compression spring 33 is fixed to the other end of the movable groove 31 away from the limiting groove 32, and the second pressure plate 34 is fixed to the other end of the compression spring 33.

[0041] The support rod 36 is inserted into the limiting groove 32, and the second pressure plate 34 presses against the side of the movable block 35.

[0042] The support bar 30 provides support, the movable groove 31 facilitates the movement of the movable block 35, the limiting groove 32 provides a limiting function, the compression spring 33 has a telescopic function, the second pressure plate 34 provides a connecting function, the movable block 35 provides a connecting function, the support rod 36 provides support and connection, and the limiting post 37 provides a limiting function.

[0043] Working principle:

[0044] After adjusting the position of the outer spring 13, insert the movable block 35 into the movable groove 31 of the support bar 30, move the support rod 36 to drive the movable block 35 to move in the movable groove 31. When the limiting post 37 moves to the nearest point of the support plate 22 or is in contact with the support plate 22, the support rod 36 is inserted into the limiting groove 32, and the second pressure plate 34 is pressed against the movable block 35 under the action of the pressure spring 33.

[0045] This step can reinforce the structure and reduce the probability that the arc-shaped locking block 24 will move out of the annular locking groove 20 due to vibration.

[0046] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A self-sealing blowout preventer, characterized by, Include: The self-sealing blowout preventer comprises a blowout preventer body (10), a pipe body (11), a polished rod (12), an outer spring (13) and a lubricating grease cylinder (14), the pipe body (11) is welded on the side of the blowout preventer body (10) and communicates with the blowout preventer body (10), the polished rod (12) is inserted into the vertical through hole of the blowout preventer body (10), one end of the outer spring (13) is fixed on the side of the lubricating grease cylinder (14), and the other end of the lubricating grease cylinder (14) away from the outer spring (13) is attached to the outer side wall of the polished rod (12); The moving assembly comprises an annular clamping groove (20), a support column (21), a support plate (22), a spring column (23) and an arc-shaped clamping block (24), the annular clamping groove (20) is formed on the inner side of the pipe body (11) away from one end of the blowout preventer body (10) to the middle of the pipe body (11), the support column (21) is inserted into the inner side of the pipe body (11), the support plate (22) is fixed on the middle of the end of the support column (21) away from the blowout preventer body (10), one end of the spring column (23) is fixed on the side of the support plate (22), and the inner side of the arc-shaped clamping block (24) is fixed on the other end of the spring column (23), and the outer side of the arc-shaped clamping block (24) is attached to the inner wall of the pipe body (11).

2. A self-sealing blowout preventer according to claim 1, characterized in that: The moving assembly further comprises a first pressing plate (25) fixed on the end of the arc-shaped clamping block (24) away from the blowout preventer body (10).

3. A self-sealing blowout preventer according to claim 1, wherein: The outer side of the arc-shaped clamping block (24) is once formed with an arc-shaped clamping tooth, and the arc-shaped clamping tooth is clamped in the annular clamping groove (20).

4. A self-sealing blowout preventer according to claim 1, wherein: The self-sealing blowout preventer further comprises an inner spring (15) and a piston (16), the inner spring (15) is located on the inner side of the outer spring (13), one end is fixed on the side of the support column (21), the other end is fixed on the side of the piston (16), and the piston (16) is movably connected in the lubricating grease cylinder (14).

5. A self-sealing blowout preventer according to claim 1, wherein: It also includes a protection assembly, the protection assembly comprises a support strip (30), a movable groove (31), a limiting groove (32), a movable block (35), a support rod (36) and a limiting column (37), the support strip (30) is fixed on the outer side of the pipe body (11), the movable groove (31) is formed on the side of the support strip (30), the limiting groove (32) is formed on one side of the movable groove (31), the movable block (35) is inserted into the movable groove (31), the support rod (36) is fixed between the two movable blocks (35), and the limiting column (37) is fixed on the side of the support rod (36).

6. A self-sealing blowout preventer according to claim 5, wherein: The protection assembly further comprises a compression spring (33) and a second pressing plate (34), one end of the compression spring (33) is fixed on the other end of the movable groove (31) away from the limiting groove (32), and the second pressing plate (34) is fixed on the other end of the compression spring (33).

7. A self-sealing blowout preventer according to claim 5, wherein: The support rod (36) is inserted into the limiting groove (32), and the second pressing plate (34) is pressed on the side of the movable block (35).

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