Fully enclosed rotating blowout preventer housing

Abstract

The invention discloses a fully enclosed rotary blowout preventer housing, which is composed of a housing assembly and an anti-overflow pipe assembly; the housing assembly is mainly composed of a housing body, a gland, a top cover, and a liquid cylinder assembly; the anti-overflow pipe assembly is mainly composed of a connecting seat assembly, a lifting cylinder assembly, and a mud umbrella assembly; the upper part of the housing body is sequentially installed with a gland and a top cover, two liquid cylinder assemblies are installed between the housing body and the gland through two clamping plates, the liquid cylinder assembly is respectively connected to an opening module and a closing module through a plurality of ferrule joints and hydraulic pipelines, and is aggregated and connected to the gland, the upper end of the top cover is installed with a connecting seat assembly, the lifting cylinder assembly is connected to the connecting seat assembly through a clamping seat and a locking screw, and the mud umbrella assembly is installed above the lifting cylinder assembly and fixed by a locking bolt and a locking nut. The invention solves the problem of mud falling and polluting the environment during the use of the rotary blowout preventer, and effectively protects the environment around the wellhead.

Description

Technical Field

[0001] The invention belongs to the field of petroleum drilling and relates to a fully enclosed rotary blowout preventer shell used for underbalanced drilling. Background Art

[0002] At present, underbalanced drilling technology has been developed and mature, and its effects in discovering and protecting oil and gas layers and increasing drilling speed have also been recognized. During the drilling process of the existing rotary blowout preventers used at home and abroad, the drilling fluid will be carried out of the wellhead by the drill pipe and fall on the ground and platform, causing pollution to the surrounding environment. Summary of the invention

[0003] The purpose of the present invention is to provide a fully enclosed rotary blowout preventer housing to solve the problem of mud falling and polluting the environment during the use of the rotary blowout preventer and effectively protect the environment around the wellhead.

[0004] The technical solution of the present invention is: the fully enclosed rotary blowout preventer shell is composed of a shell assembly and an overflow prevention pipe assembly; wherein, the shell assembly is mainly composed of a shell body, a gland, a top cover, and a cylinder assembly; the bottom of the shell body is designed as a standard BX flange for connecting the annular blowout preventer, the upper part of the shell body is sequentially installed with a gland and a top cover, and sealing rings are provided at the connection positions, two card plates are installed between the shell body and the gland, two cylinder assemblies are installed between the two card plates, two clamps are respectively installed above the card plates, anti-loosening ejector rods are installed on the clamps, the anti-loosening ejector rods are connected to the gland through the card plates, and the outer circle of the gland is provided with a safety lock nut, the cylinder assembly is connected to the clamp through a power card plate to control the clamping / loosening of the card plate, and an opening module and a closing module are installed between the gland and the top cover. The closing module, the cylinder assembly is connected to the opening module and the closing module respectively through a number of ferrule joints and hydraulic pipelines, and is summarized and connected to the pressure cover. The outer circle of the pressure cover is provided with an opening and closing outlet for connecting the remote control equipment. A union flange is installed on the side of the top cover for collecting drilling fluid. An anti-overflow pipe assembly is installed on the upper end of the top cover, and a sealing ring is installed between the top cover and the anti-overflow pipe assembly; wherein, the anti-overflow pipe assembly is mainly composed of a connecting seat assembly, a lifting cylinder assembly and a mud umbrella assembly, the connecting seat assembly is connected to the shell assembly, the lifting cylinder assembly is connected to the connecting seat assembly through a clamping seat and a locking screw, a sealing ring and a scraper are provided between the lifting cylinder assembly and the connecting seat assembly, and the mud umbrella assembly is installed above the lifting cylinder assembly and is fixed by multiple locking bolts, locking nuts and nuts on the circumference.

[0005] Furthermore, an outlet is provided on the side of the shell body for connecting to a pressure control manifold.

[0006] Furthermore, the upper sealing surface of the shell body is welded with stainless steel or nickel-based alloy to increase the surface hardness and corrosion resistance.

[0007] Furthermore, the hydraulic cylinder assembly becomes a double-cylinder structure.

[0008] Furthermore, there are multiple observation windows provided around the outer circumference of the connecting seat assembly.

[0009] Furthermore, there are multiple lifting screws provided on the circumference of the lifting cylinder assembly. The mud umbrella assembly is fixed above the lifting screws through lock nuts and nuts. The lower end of the lifting screw is connected to the connecting seat assembly for adjusting the installation height of the lifting cylinder assembly.

[0010] The advantages of the present invention are as follows:

[0011] 1. A fully enclosed rotating blowout preventer housing. Sealing rings are provided at all connecting parts of this structure, which can effectively prevent the leakage of drilling fluid.

[0012] 2. Two hydraulic cylinder assemblies are built-in, with strong clamping force and remote control. When tripping in or out drill pipes or replacing the bearing assembly, it is not necessary to open the housing assembly, realizing the full enclosure of the equipment.

[0013] 3. The height of the overflow pipe can be adjusted according to site requirements.

[0014] 4. A large-sized mud umbrella is equipped at the topmost end of the overflow pipe assembly, which can effectively prevent the splashing of drilling fluid. A union side outlet is provided at the lowermost end of the overflow pipe to connect a pipeline to the mud pit, collecting the drilling fluid in the overflow pipe into the mud pit for recycling.

[0015] 5. Multiple observation windows are installed below the overflow pipe to observe the operation of the blowout preventer bearing assembly and the state of the drilling fluid carried out in the overflow pipe in real time.

[0016] 6. Two outlets are provided on the side of the housing assembly for connecting the automatic choke manifold equipment. The inlets and outlets of the two built-in hydraulic cylinder assemblies in the housing assembly are connected in parallel to the opening / closing module and externally connected to the remote equipment through gland covers.

[0017] 7. The clamping plate is connected to the hydraulic cylinder assembly to remotely close and open the housing assembly. The clamping plate is connected to the anti-loosening top rod and the safety lock nut, and the housing assembly can also be manually opened and closed.

[0018] 8. A side outlet is provided at the upper part of the housing assembly and a union flange is installed for connecting the mud recovery system.

[0019] 9. Multiple lifting screws are provided on the circumference of the overflow pipe assembly to realize the functions of lifting and height adjustment of the overflow pipe. Sealing rings and scrapers are provided at the lifting and sliding parts of the lifting cylinder assembly. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is a schematic diagram of the housing assembly part of the present invention;

[0022] Figure 3 It is the top view of the A-A section of the housing assembly;

[0023] Figure 4 It is a schematic diagram of the overflow prevention pipe assembly part of the present invention.

[0024] In the figure: 1. Housing assembly; 2. Overflow prevention pipe assembly; 3. Housing body; 4. First blind flange; 5. Second blind flange; 6. gland; 7. retaining plate; 8. anti-loosening ejector rod; 9. safety lock nut; 10. clamping plate; 11. hexagon socket head screw; 12. closing module; 13. opening module; 14. gland bolt and nut; 15. top cover; 16. top cover bolt and nut; 17. union flange; 18. hydraulic cylinder assembly; 19. ferrule fitting; 20. hydraulic pipeline; 21. power retaining plate; 22. connecting seat assembly; 23. transparent observation window; 24. observation window gland; 25. hexagon screw; 26. positioning nut; 27. positioning seat; 28. lifting screw; 29. scraper; 30. sealing ring; 31. locking screw; 32. clamping seat; 33. lifting cylinder assembly; 34. locking bolt; 35. locking nut; 36. mud umbrella assembly. Specific embodiments

[0025] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but it should not be construed as a limitation to the technical solution.

[0026] Such as Figures 1-4As shown in the figure, the fully enclosed rotating blowout preventer housing is composed of a housing assembly 1 and an overflow pipe assembly 2. Among them, the housing assembly 1 mainly consists of a housing body 3, a gland 6, a top cover 15, and a hydraulic cylinder assembly 18. The bottom of the housing body 3 is designed as a standard 6BX flange for connecting the annular blowout preventer. The gland 6 is installed above the housing body 3, and a sealing ring is provided between the housing body 3 and the gland 6. Two clamping plates 7 are symmetrically installed between the housing body 3 and the gland. Splints 10 are respectively installed on the clamping plates 7. The splints 10 are respectively connected to anti-loosening ejector rods 8, and socket head cap screws 11 are installed on the other side of the splints 10 to fix the anti-loosening ejector rods 8. The anti-loosening ejector rods 8 pass through the clamping plates 7 and the gland 6, and safety lock nuts 9 are installed at the outermost ends of the anti-loosening ejector rods 8. A sealing ring is provided between the safety ejector rods 8 and the gland 6. Two groups of hydraulic cylinder assemblies 18 are installed between the two clamping plates 7. The two sides of the hydraulic cylinder assembly 18 are respectively connected to the splints 10 through power clamping plates 21. The inlets and outlets of the hydraulic cylinder assembly 18 are designed with different specifications of threads, which are respectively connected to ferrule joints 19 and are connected in parallel to a closing module 12 and an opening module 13 through a hydraulic pipeline 20. The closing module 12 and the opening module 13 are respectively installed on the gland 6 and are connected to remote control equipment through the pipe threads on the gland. Multiple sealing rings are provided between the closing module 12 and the opening module 13 and the gland 6. The top cover 15 is installed above the gland 6 and is fixed by gland bolts and nuts 14. A sealing ring is provided between the gland 6 and the top cover 15. An outlet is provided on the side of the top cover 15 and is connected to a union flange 17 for collecting drilling fluid. A sealing ring and top cover bolts and nuts 16 are provided at the upper end of the top cover 15 for connecting the overflow pipe assembly 2. Among them, the overflow pipe assembly 2 mainly consists of a connection seat assembly 22, a lifting cylinder assembly 33, and a mud umbrella assembly 36. A flange plate is welded below the connection seat assembly 22 and is connected to the housing assembly 1. The lifting cylinder assembly 33 is installed above the connection seat assembly 22 and is fixed by a clamping seat 32 and multiple locking screws 31. A sealing ring 30 and a scraper 29 are installed between the lifting cylinder assembly 33 and the connection seat assembly 22 to scrape off the debris on the inner wall of the connection seat assembly 22 and seal it. The mud umbrella assembly 36 is installed above the lifting cylinder assembly 33 and is fixed by multiple locking bolts 34 and locking nuts 35.

[0027] A further design is that the housing body 3 is provided with two side outlets, and a first blind flange 4 and a second blind flange 5 are respectively installed for connecting the pressure control manifold.

[0028] A further design is that the upper sealing surface of the housing body 3 is surfacing welded with stainless steel or nickel-based alloy to increase the surface hardness and corrosion resistance.

[0029] A further design is that the two groups of hydraulic cylinder assemblies 18 are both of double-cylinder structure.

[0030] A further design is that a plurality of observation windows are provided around the connector assembly 22. A transparent observation window 23 and an observation window gland 24 are installed in the observation windows and fixed by hexagon socket head cap screws 25.

[0031] A further design is that a plurality of positioning seats 27 are welded around the connector assembly 22, and a plurality of lifting screws 28 are provided around the mud umbrella assembly 36. The upper ends of the lifting screws 28 are connected and fixed to the lifting cylinder assembly 33 and the mud umbrella assembly 36. The lower ends of the lifting screws 28 are connected to the positioning seats 27 through positioning nuts 26. The lifting screws 28 are used to adjust the height of the blowout preventer pipe assembly 2.

[0032] During use, the fully enclosed rotating blowout preventer housing is installed on the upper part of the annular blowout preventer through a standard 6BX flange at the bottom of the housing body; two outlets on the side of the housing assembly are used to connect to the automatic choke manifold equipment; the inlets and outlets of two sets of hydraulic cylinder assemblies inside the housing assembly are connected in parallel to the opening module / closing module and externally connected to the remote equipment through a gland, and the rotation of the blowout preventer bearing assembly is clamped / loosened by remotely controlling four internal hydraulic cylinders; a union flange is installed at the side outlet on the upper part of the housing assembly to connect to the mud recovery system; when the drill pipe is pulled out or the bearing assembly is replaced, the scattered drilling fluid is collected by the blowout preventer pipe and the mud umbrella and transported to the mud pit through the collection window for recycling to avoid the drilling fluid from falling.

Claims

1. The fully enclosed rotating blowout preventer housing is characterized in that: It is composed of a housing assembly (1) and an anti-overflow pipe assembly (2); among them, the housing assembly (1) mainly consists of a housing body (3), a gland (6), a top cover (15), and a hydraulic cylinder assembly (18); the bottom of the housing body (3) is designed as a standard 6BX flange for connecting an annular blowout preventer, the gland (6) is installed above the housing body (3), a sealing ring is provided between the housing body (3) and the gland (6), two clamping plates (7) are symmetrically installed between the housing body (3) and the gland (6), clamping plates (10) are respectively installed on the clamping plates (7), the clamping plates (10) are respectively connected to anti-loosening ejector rods (8), and socket head cap screws (11) are installed on the other side of the clamping plates (10) to fix the anti-loosening ejector rods (8), the anti-loosening ejector rods (8) pass through the clamping plates (7) and the gland (6), a safety lock nut (9) is installed at the outermost end of the anti-loosening ejector rods (8), and a sealing ring is provided between the anti-loosening ejector rods (8) and the gland (6); two groups of hydraulic cylinder assemblies (18) are installed between the two clamping plates (7), both sides of the hydraulic cylinder assembly (18) are respectively connected to the clamping plates (10) through power clamping plates (21), the inlets and outlets of the hydraulic cylinder assembly (18) are designed as threads of different specifications and are respectively connected to ferrule connectors (19), and are connected in parallel to a closing module (12) and an opening module (13) through a hydraulic pipeline (20), the closing module (12) and the opening module (13) are respectively installed on the gland (6), and are connected to remote control equipment through the pipe threads on the gland, and multiple sealing rings are provided between the closing module (12) and the opening module (13) and the gland (6); the top cover (15) is installed above the gland (6) and is fixed through gland bolts and nuts (14), a sealing ring is provided between the gland (6) and the top cover (15), an outlet is provided on the side of the top cover (15) and is connected to a union flange (17) for collecting drilling fluid, and a sealing ring and top cover bolts and nuts (16) are provided at the upper end of the top cover (15) for connecting the anti-overflow pipe assembly (2); among them, the anti-overflow pipe assembly (2) mainly consists of a connection seat assembly (22), a lifting cylinder assembly (33), and a mud umbrella assembly (36); a flange plate is welded below the connection seat assembly (22) and is connected to the housing assembly (1); the lifting cylinder assembly (33) is installed above the connection seat assembly (22) and is fixed through a clamping seat (32) and multiple locking screws (31), a sealing ring (30) and a scraper (29) are installed between the lifting cylinder assembly (33) and the connection seat assembly (22) to scrape the sundries on the inner wall of the connection seat assembly (22) and seal; the mud umbrella assembly (36) is installed above the lifting cylinder assembly (33) and is fixed through multiple locking bolts (34) and locking nuts (35).

2. The fully enclosed rotating blowout preventer housing according to claim 1, characterized in that: The housing body (3) is provided with two side outlets, and a first blind flange (4) and a second blind flange (5) are respectively installed for connecting a pressure control manifold.

3. The fully enclosed rotating blowout preventer housing according to claim 1, characterized in that: Both of the two groups of hydraulic cylinder assemblies (18) are of double-cylinder structure.

4. The fully enclosed rotary blowout preventer housing according to claim 1, wherein: A plurality of observation windows are provided around the connection seat assembly (22), and transparent observation windows (23) and observation window gland covers (24) are installed on the observation windows and are fixed through hexagon socket head cap screws (25).

5. The fully enclosed rotating blowout preventer housing according to claim 1, characterized in that: A plurality of positioning seats (27) are welded around the connecting seat assembly (22). A plurality of lifting screws (28) are provided around the mud umbrella assembly (36). The upper ends of the lifting screws (28) are fixedly connected to the lifting cylinder assembly (33) and the mud umbrella assembly (36). The lower ends of the lifting screws (28) are connected to the positioning seats (27) through positioning nuts (26). The lifting screws (28) are used to adjust the height of the overflow prevention pipe assembly (2).

6. The fully enclosed rotating blowout preventer housing according to claim 1, characterized in that: The upper sealing surface of the housing body (3) is surfacing welded with stainless steel or nickel-based alloy to increase the surface hardness and corrosion resistance.

Images