Protective device and blowout preventer

Abstract

The present invention relates to the technical field of blowout preventers, and specifically to a protective device and a blowout preventer, comprising: a protective collar, which is sleeved on the outer surface of a second connecting flange, and a guide groove is provided on the side wall of the protective collar; a rubber sealing plate, which is arranged inside the protective collar, and a connecting ring is provided on the upper end face of the rubber sealing plate; a sealing gasket, which is arranged on the outer side wall of the connecting ring, and a second sealing airbag is provided on the side wall of the sealing gasket; the beneficial effect is that the pre-fixation of the connecting pipe and the blowout preventer body is achieved by sleeved with the protective collar, and at the same time, the sealing ring and the sealing block are arranged with the first sealing groove and the second sealing groove to seal, and when the connecting ring is inserted into the interior of the groove, it will be squeezed inward due to the inclined arrangement of the sealing gasket, and the gas inside the sealing gasket will enter the interior of the second sealing airbag, and the second sealing airbag filled with air serves to seal, and the protective cover protects the gap between the protective collar and the second connecting flange.

Description

Technical Field

[0001] The present invention relates to the technical field of blowout preventers, in particular to a protection device and a blowout preventer. Background Art

[0002] Blowout preventers are used to close the wellhead during oil testing, workover, and completion operations to prevent blowouts. They combine full and semi-sealing functions into one unit, featuring a simple structure, easy operation, and high-pressure resistance. They are commonly used safety sealing wellhead devices in oil fields to prevent blowouts.

[0003] When the blowout preventer is connected to the pipeline, the flange between the two pipeline ports is usually fixed directly with fixing bolts, and a sealing gasket is placed between the two sets of flanges before fixing;

[0004] However, the sealing gasket will be damaged or corroded during long-term use, causing leakage between the two sets of flanges. In addition, during the connection process of the two sets of flanges, since there is no connection or limit between the flanges, multiple people are required to align and fix the pipes before they can be fixed, which is time-consuming and labor-intensive. Summary of the Invention

[0005] The object of the present invention is to provide a protection device and a blowout preventer to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a protective device, comprising:

[0007] A protective collar is sleeved on the outer surface of the second connecting flange, and a guide groove is provided on the inner side wall of the protective collar;

[0008] A rubber sealing plate is arranged inside the protective collar, and a connecting ring is provided on the upper end surface of the rubber sealing plate;

[0009] The sealing pad is arranged on the outer side wall of the connecting ring, and a second sealing air bag is arranged at the center of the side wall of the sealing pad.

[0010] Preferably, a first connecting flange is provided below the second connecting flange, the size of the first connecting flange matches the size of the second connecting flange, and the first connecting flange and the second connecting flange are fixedly connected by fixing bolts, a blowout preventer body is fixedly provided on an end of the first connecting flange away from the second connecting flange, the blowout preventer body is connected to the second connecting flange through the first connecting flange, and a connecting pipe is fixedly provided at the center position of an end of the second connecting flange away from the first connecting flange, and the connecting pipe is communicated with the blowout preventer body through the cooperation of the first connecting flange and the second connecting flange.

[0011] Preferably, the size of the second connecting flange matches the internal size of the protective collar, a groove is provided on the side wall of the upper surface of the second connecting flange, the groove is annular in structure, and a protective cover is provided inside the groove, the size of the protective cover matches the internal size of the groove, one end of the protective cover is fixedly connected to the internal bottom wall of the groove, and the end of the protective cover away from the groove is fixedly connected to the internal top wall of the protective collar.

[0012] Preferably, a guide block is fixedly provided at the center position of the side wall of the second connecting flange, and multiple groups of guide blocks are provided. The multiple groups of guide blocks are evenly and symmetrically distributed, and the multiple groups of guide blocks are respectively slidably provided inside the multiple groups of guide grooves. The multiple groups of guide grooves are evenly and symmetrically distributed on the inner side wall of the protective collar with the protective collar as the center, and the internal size of the guide groove matches the size of the guide block. The second connecting flange drives the connecting pipe to move up and down through the cooperation of the guide block and the guide groove.

[0013] Preferably, a fixing groove is provided on the outer side wall of the lower end face of the second sealing groove, the fixing groove is annular in structure, and a return spring is provided inside the fixing groove, the size of the return spring matches the internal size of the fixing groove, one end of the return spring is fixedly connected to the internal top of the fixing groove, and the end of the return spring away from the fixing groove is fixedly connected to the upper end face of the fixing ring, and the fixing ring is fixedly set on the inner side wall of the protective collar.

[0014] Preferably, the fixing ring is annular in structure, the size of the outer side wall of the fixing ring matches the inner size of the protective collar, and the size of the inner side wall of the fixing ring matches the inner size of the fixing groove, the second connecting flange is elastically arranged inside the protective collar by a reset spring, and a rubber sealing plate is fixedly provided on the side wall of the fixing ring away from the reset spring, and the size of the rubber sealing plate matches the inner size of the second connecting flange.

[0015] Preferably, a connecting ring is fixedly provided on the upper surface of the rubber sealing plate, the size of the connecting ring matches the size of the internal through hole of the connecting pipe, and a sealing gasket is fixedly provided on the outer side wall of the upper end face of the connecting ring, the sealing gasket has an annular structure, and the cross-section of the sealing gasket has a hollow triangular structure, a receiving groove is provided at the center position of the inclined side wall of the sealing gasket, a second sealing airbag is fixedly provided inside the receiving groove, the second sealing airbag has a semicircular structure, and the second sealing airbag is connected to the interior of the sealing gasket, a groove is provided above the connecting ring, the groove is provided at the bottom center position of the second connecting flange, and the internal size of the groove matches the size of the connecting ring.

[0016] Preferably, a sealing block is fixedly provided below the rubber sealing plate, the sealing block is annular in structure, and the cross section of the sealing block is trapezoidal in structure, a sealing ring is provided on the outside of the sealing block, the sealing ring is fixedly provided on the lower surface of the rubber sealing plate, and a first sealing airbag is fixedly provided on both side walls of the outer surface of the sealing ring.

[0017] Preferably, a first sealing groove is provided at the center position of the upper surface of the first connecting flange, the internal size of the first sealing groove matches the size of the sealing block, and a second sealing groove is provided on the outside of the first sealing groove, the second sealing groove is provided on the upper surface of the first connecting flange, and the internal size of the second sealing groove matches the size of the sealing ring, a snap-fit ​​groove is provided inside the second sealing groove, the internal size of the snap-fit ​​groove matches the size of the first sealing airbag, and a limiting block is fixedly provided on the side wall of the first connecting flange, the limiting block is slidably provided inside the limiting groove, the limiting groove is provided on the inner side wall of the protective collar, and the internal size of the limiting groove matches the size of the limiting block.

[0018] A blowout preventer comprises the above-mentioned protection device.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The protective device and blowout preventer proposed in the present invention realize pre-fixation of the connecting pipe and the blowout preventer body by the sleeve arrangement of the protective collar. At the same time, the arrangement of the sealing ring and the sealing block and the first sealing groove and the second sealing groove can play a staged sealing role. Then, when the connecting ring is inserted into the interior of the groove, it will be squeezed inward due to the inclined arrangement of the sealing gasket. During the squeezing process, the gas inside the sealing gasket will enter the interior of the second sealing airbag. The second sealing airbag filled with air plays a two-stage sealing role. In addition, the arrangement of the protective cover can protect the gap between the protective collar and the second connecting flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection between the blowout preventer body and the first connecting flange structure of the present invention;

[0023] Figure 3 This is a cross-sectional view of the connection between the protective collar and the second connecting flange structure of the present invention;

[0024] Figure 4 for Figure 3 A schematic diagram of the structure at center A;

[0025] Figure 5 for Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0026] Figure 6 for Figure 5 A magnified schematic diagram of the structure at point C in the middle;

[0027] Figure 7 It is a schematic diagram of the bottom of the protective collar and rubber sealing plate structure of the present invention.

[0028] In the figure: blowout preventer body 1, connecting pipe 2, protective collar 3, first connecting flange 4, first sealing groove 5, second sealing groove 6, engaging groove 7, second connecting flange 8, countersunk groove 9, protective cover 10, guide block 11, guide groove 12, fixing groove 13, return spring 14, fixing ring 15, rubber sealing plate 16, sealing ring 17, sealing block 18, first sealing airbag 19, groove 20, connecting ring 21, sealing gasket 22, receiving groove 23, second sealing airbag 24, limiting groove 25, limiting block 26. DETAILED DESCRIPTION

[0029] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1-Figure 7 The present invention provides a technical solution: a protective device, the protective device comprising:

[0032] A protective collar 3 is sleeved on the outer surface of the second connecting flange 8, and a guide groove 12 is provided on the inner side wall of the protective collar 3; a rubber sealing plate 16 is provided inside the protective collar 3, and a connecting ring 21 is provided on the upper end surface of the rubber sealing plate 16; a sealing gasket 22 is provided on the outer side wall of the connecting ring 21, and a second sealing airbag 24 is provided at the center of the side wall of the sealing gasket 22;

[0033] Pre-fixation is achieved through the protective ring 3, and the setting of the rubber sealing plate 16 can play a stage-by-stage sealing role. Then, during the installation process, the sealing gasket block 22 will be squeezed inward due to the inclined setting of the sealing gasket block 22. During the squeezing process, the gas inside the sealing gasket block 22 will enter the interior of the second sealing airbag 24, and the second sealing airbag 24 filled with air plays a second-stage sealing role.

[0034] Example 2

[0035] On the basis of embodiment 1, in order to achieve sealing and limited sliding between the protective collar 3 and the second connecting flange 8, a first connecting flange 4 is provided below the second connecting flange 8, the size of the first connecting flange 4 matches the size of the second connecting flange 8, and the first connecting flange 4 and the second connecting flange 8 are fixedly connected by fixing bolts, and the blowout preventer body 1 is fixedly provided on the end of the first connecting flange 4 away from the second connecting flange 8, the blowout preventer body 1 is connected to the second connecting flange 8 through the first connecting flange 4, and a connecting pipe 2 is fixedly provided at the center position of the end of the second connecting flange 8 away from the first connecting flange 4, and the connecting pipe 2 is connected to the blowout preventer body 1 through the cooperation of the first connecting flange 4 and the second connecting flange 8, the size of the second connecting flange 8 matches the internal size of the protective collar 3, and the second connecting flange 8 is fixedly provided with a connecting pipe 2. A groove 9 is provided on the side wall of the upper surface of the flange 8. The groove 9 is annular in structure, and a protective cover 10 is provided inside the groove 9. The size of the protective cover 10 matches the internal size of the groove 9. One end of the protective cover 10 is fixedly connected to the internal bottom wall of the groove 9, and the end of the protective cover 10 away from the groove 9 is fixedly connected to the internal top wall of the protective collar 3. A guide block 11 is fixedly provided at the center position of the side wall of the second connecting flange 8. There are multiple groups of guide blocks 11, and the multiple groups of guide blocks 11 are evenly and symmetrically distributed. The multiple groups of guide blocks 11 are respectively slidably provided inside the multiple groups of guide grooves 12. The multiple groups of guide grooves 12 are evenly and symmetrically distributed on the internal side wall of the protective collar 3 with the protective collar 3 as the center, and the internal size of the guide groove 12 matches the size of the guide block 11. The second connecting flange 8 drives the connecting pipe 2 to move up and down through the cooperation of the guide block 11 and the guide groove 12.

[0036] Example 3

[0037] On the basis of Example 2, in order to achieve the elastic setting of the second connecting flange 8 and realize buffering during the installation process, a fixing groove 13 is opened on the outer side wall of the lower end face of the second sealing groove 6. The fixing groove 13 is annular in structure, and a return spring 14 is arranged inside the fixing groove 13. The size of the return spring 14 matches the internal size of the fixing groove 13. One end of the return spring 14 is fixedly connected to the internal top of the fixing groove 13, and the end of the return spring 14 away from the fixing groove 13 is fixedly connected to the upper end face of the fixing ring 15. The fixing ring 15 is fixedly set on the inner side wall of the protective collar 3. The fixing ring 15 is annular in structure, and the size of the outer side wall of the fixing ring 15 matches the internal size of the protective collar 3, and the size of the inner side wall of the fixing ring 15 matches the internal size of the fixing groove 13. The second connecting flange 8 is elastically set inside the protective collar 3 by the return spring 14, and a rubber sealing plate 16 is fixedly provided on the side wall of the fixing ring 15 away from the return spring 14. The size of the rubber sealing plate 16 matches the internal size of the second connecting flange 8.

[0038] Example 4

[0039] On the basis of embodiment three, in order to achieve sealing protection between the first connecting flange 4 and the second connecting flange 8, a connecting ring 21 is fixedly provided on the upper surface of the rubber sealing plate 16. The size of the connecting ring 21 matches the size of the internal through hole of the connecting pipe 2, and a sealing gasket 22 is fixedly provided on the outer side wall of the upper end face of the connecting ring 21. The sealing gasket 22 has an annular structure, and the cross-section of the sealing gasket 22 has a hollow triangular structure. A receiving groove 23 is provided at the center position of the inclined side wall of the sealing gasket 22. A second sealing airbag 24 is fixedly provided inside the receiving groove 23. The second sealing airbag 24 has a semicircular structure, and the second sealing airbag 24 is connected to the interior of the sealing gasket 22. A groove 20 is provided above the connecting ring 21. The groove 20 is provided at the bottom center position of the second connecting flange 8, and the internal size of the groove 20 matches the size of the connecting ring 21. A sealing stopper 18 is fixedly provided below the rubber sealing plate 16. The sealing stopper 18 has an annular structure and is sealed. The cross-section of the stopper 18 is a trapezoidal structure. A sealing ring 17 is provided on the outside of the sealing stopper 18. The sealing ring 17 is fixedly arranged on the lower surface of the rubber sealing plate 16, and the side walls on both sides of the outer surface of the sealing ring 17 are fixedly provided with a first sealing airbag 19. A first sealing groove 5 is provided at the center position of the upper surface of the first connecting flange 4. The internal size of the first sealing groove 5 matches the size of the sealing stopper 18, and a second sealing groove 6 is provided on the outside of the first sealing groove 5. The second sealing groove 6 is provided on the upper surface of the first connecting flange 4, and the internal size of the second sealing groove 6 matches the size of the sealing ring 17. A snap-fit ​​groove 7 is provided inside the second sealing groove 6, and the internal size of the snap-fit ​​groove 7 matches the size of the first sealing airbag 19. A limiting block 26 is fixedly provided on the side wall of the first connecting flange 4. The limiting block 26 is slidably arranged inside the limiting groove 25. The limiting groove 25 is provided on the inner side wall of the protective collar 3, and the internal size of the limiting groove 25 matches the size of the limiting block 26.

[0040] When in use, the protective collar 3 is sleeved on the outer surface of the first connecting flange 4. When sleeved, the limit block 26 is slidably engaged with the inside of the limit groove 25. When the rubber sealing plate 16 and the first connecting flange 4 are in contact with each other, the sealing block 18 is engaged with the inside of the first sealing groove 5 for sealing. The sealing ring 17 and the first sealing airbag 19 are respectively engaged with the inside of the second sealing groove 6 and the engaging groove 7 for re-sealing. At this time, the fixing threaded holes of the first connecting flange 4 and the second connecting flange 8 match each other, and then the fixing bolts are inserted into the fixing threaded holes of the first connecting flange 4 and the second connecting flange 8 and screwed. By screwing, the second connecting flange 8 gradually approaches the first connecting flange 4. During the approach process, the second connecting flange 8 gradually moves downward. During the movement, the fixing ring 15 is snapped into the inside of the fixing groove 13 and compresses the reset spring 14. At the same time, the protective cover 10 will gradually unfold for protection, and the connecting ring 21 will be snapped into the inside of the groove 20 at this time. During the snapping process, the side wall of the groove 20 will compress the sealing gasket 22, and the air inside the sealing gasket 22 is squeezed into the inside of the second sealing airbag 24, so that the side wall of the second sealing airbag 24 is tightly fitted with the side wall of the groove 20, and is sealed again to achieve the purpose of protection.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A protective device, characterized in that: The protective device comprises: A protective collar (3), the protective collar (3) is sleeved on the outer surface of the second connecting flange (8), and a guide groove (12) is provided on the inner side wall of the protective collar (3); A rubber sealing plate (16) is provided inside the protective collar (3), and a connecting ring (21) is provided on the upper end surface of the rubber sealing plate (16); a sealing gasket (22) is provided on the outer side wall of the connecting ring (21), and a second sealing airbag (24) is provided at the center of the side wall of the sealing gasket (22); a connecting ring (21) is fixedly provided on the upper surface of the rubber sealing plate (16), and the size of the connecting ring (21) matches the size of the internal through hole of the connecting pipe (2), and A sealing gasket (22) is fixedly provided on the outer side wall of the upper end surface of the connecting ring (21). The sealing gasket (22) is an annular structure, and the cross section of the sealing gasket (22) is a hollow triangular structure. A receiving groove (23) is provided at the center of the inclined side wall of the sealing gasket (22). A second sealing airbag (24) is fixedly provided inside the receiving groove (23). The second sealing airbag (24) is a semicircular structure, and the second sealing airbag (24) is connected to the inside of the sealing gasket (22). The upper part of the connecting ring (21) is provided with a A groove (20) is provided, the groove (20) is provided at the center position of the bottom of the second connecting flange (8), and the inner size of the groove (20) matches the size of the connecting ring (21); a first sealing groove (5) is provided at the center position of the upper surface of the first connecting flange (4), the inner size of the first sealing groove (5) matches the size of the sealing block (18), and a second sealing groove (6) is provided on the outer side of the first sealing groove (5), the second sealing groove (6) is provided on the upper surface of the first connecting flange (4), and the second sealing groove (6) is provided on the outer side of the first sealing groove (5). The inner size of the sealing groove (6) matches the size of the sealing ring (17), a snap-fit ​​groove (7) is provided inside the second sealing groove (6), the inner size of the snap-fit ​​groove (7) matches the size of the first sealing airbag (19), and a limiting block (26) is fixedly provided on the side wall of the first connecting flange (4), the limiting block (26) is slidably provided inside the limiting groove (25), the limiting groove (25) is provided on the inner side wall of the protective collar (3), and the inner size of the limiting groove (25) matches the size of the limiting block (26).

2. A protective device according to claim 1, characterized in that: A first connecting flange (4) is provided below the second connecting flange (8), the size of the first connecting flange (4) matches the size of the second connecting flange (8), and the first connecting flange (4) and the second connecting flange (8) are fixedly connected by fixing bolts, a blowout preventer body (1) is fixedly provided at one end of the first connecting flange (4) away from the second connecting flange (8), the blowout preventer body (1) is connected to the second connecting flange (8) through the first connecting flange (4), and a connecting pipe (2) is fixedly provided at the center position of one end of the second connecting flange (8) away from the first connecting flange (4), and the connecting pipe (2) is communicated with the blowout preventer body (1) through the cooperation of the first connecting flange (4) and the second connecting flange (8).

3. A protective device according to claim 2, characterized in that: The size of the second connecting flange (8) matches the internal size of the protective collar (3), and a sink groove (9) is provided on the side wall of the upper surface of the second connecting flange (8). The sink groove (9) is annular in structure, and a protective cover (10) is provided inside the sink groove (9). The size of the protective cover (10) matches the internal size of the sink groove (9), and one end of the protective cover (10) is fixedly connected to the internal bottom wall of the sink groove (9), and the end of the protective cover (10) away from the sink groove (9) is fixedly connected to the internal top wall of the protective collar (3).

4. A protective device according to claim 3, characterized in that: A guide block (11) is fixedly provided at the center position of the side wall of the second connecting flange (8), and a plurality of guide blocks (11) are provided. The plurality of guide blocks (11) are evenly and symmetrically distributed, and the plurality of guide blocks (11) are respectively slidably provided inside the plurality of guide grooves (12). The plurality of guide grooves (12) are evenly and symmetrically distributed on the inner side wall of the protective collar (3) with the protective collar (3) as the center, and the inner size of the guide groove (12) matches the size of the guide block (11). The second connecting flange (8) drives the connecting pipe (2) to move up and down through the cooperation of the guide block (11) and the guide groove (12).

5. A protective device according to claim 4, characterized in that: A fixing groove (13) is provided on the outer side wall of the lower end surface of the second sealing groove (6). The fixing groove (13) is annular in structure, and a return spring (14) is provided inside the fixing groove (13). The size of the return spring (14) matches the internal size of the fixing groove (13). One end of the return spring (14) is fixedly connected to the internal top of the fixing groove (13), and the end of the return spring (14) away from the fixing groove (13) is fixedly connected to the upper end surface of the fixing ring (15). The fixing ring (15) is fixedly provided on the inner side wall of the protective collar (3).

6. A protective device according to claim 5, characterized in that: The fixing ring (15) is annular in structure, the size of the outer side wall of the fixing ring (15) matches the inner size of the protective collar (3), and the size of the inner side wall of the fixing ring (15) matches the inner size of the fixing groove (13), the second connecting flange (8) is elastically arranged inside the protective collar (3) by a return spring (14), and a rubber sealing plate (16) is fixedly arranged on the side wall of the fixing ring (15) away from the return spring (14), and the size of the rubber sealing plate (16) matches the inner size of the second connecting flange (8).

7. A protective device according to claim 1, characterized in that: A sealing block (18) is fixedly provided below the rubber sealing plate (16). The sealing block (18) is annular in structure, and the cross section of the sealing block (18) is trapezoidal in structure. A sealing ring (17) is provided on the outside of the sealing block (18). The sealing ring (17) is fixedly provided on the lower surface of the rubber sealing plate (16), and first sealing airbags (19) are fixedly provided on both side walls of the outer surface of the sealing ring (17).

8. A blowout preventer, characterized in that: The protective device comprises any one of claims 1 to 7.

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