CN212837671U

CN212837671U - Rotary blowout preventer

Info

Publication number: CN212837671U
Application number: CN202020784980.XU
Authority: CN
Inventors: 王国伟; 郭庆丰; 门明磊; 张鑫; 梁磊; 李鹏飞; 屈宪伟
Original assignee: China National Petroleum Corp; CNPC Engineering Technology R&D Co Ltd
Current assignee: China National Petroleum Corp; CNPC Engineering Technology R&D Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-03-30
Anticipated expiration: 2030-05-12

Abstract

The utility model provides a rotary blowout preventer, this rotary blowout preventer includes: an outer housing; the rubber core assembly is rotatably arranged in the outer shell in a penetrating way and comprises a rubber core shell and a rubber core component, the rubber core component is arranged in the rubber core shell and is provided with a through hole, and the through hole is used for allowing the drilling tool to pass through and sealing; the drive assembly sets up in the shell, drive assembly with glue core assembly synchronous rotation, drive assembly with glue core assembly's one end drive and be connected, glue core housing's inner wall and have slick and sly curved surface, slick and sly curved surface's cross sectional area orientation reduces gradually towards the direction of keeping away from drive assembly, glue core assembly's the other end and slick and sly curved surface looks butt, drive assembly is used for the drive to glue core assembly and glues core housing relatively and remove to the aperture of adjusting the through-hole. Through the technical scheme that this application provided, can solve the problem that the sealed demand of compound drilling tool can't be satisfied to rotatory preventer among the prior art.

Description

Rotary blowout preventer

Technical Field

The utility model relates to an oil drilling engineering technical field particularly, relates to a rotatory preventer.

Background

Generally, a rotary blowout preventer is used in a drilling operation process, so that a wellhead can be always kept in a closed state, and the wellhead can be operated under pressure. The rotary blowout preventer comprises a shell and a rubber core, wherein the rubber core is arranged in the shell and used for passing through and sealing the drilling tool.

However, in the prior art, the rubber core has a relatively fixed size, and can only seal a drilling tool with a single size, and a composite drilling tool is frequently encountered in an oil drilling field, so that a full-well section sealing wellhead cannot be realized in the tripping process. Especially, in the pressure-controlled tripping process, the pressure-controlled tripping operation of the whole well section cannot be realized. Therefore, the technical problem that the sealing requirement of the composite drilling tool cannot be met by the rotary blowout preventer in the prior art exists.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rotary blowout preventer to solve the problem that rotary blowout preventer among the prior art can't satisfy the sealed demand of composite drilling tool.

The utility model provides a rotatory preventer, rotatory preventer includes: an outer housing; the rubber core assembly is rotatably arranged in the outer shell in a penetrating way and comprises a rubber core shell and a rubber core component, the rubber core component is arranged in the rubber core shell and is provided with a through hole, and the through hole is used for allowing the drilling tool to pass through and sealing; the drive assembly sets up in the shell, drive assembly with glue core assembly synchronous rotation, drive assembly with glue core assembly's one end drive and be connected, glue core housing's inner wall and have slick and sly curved surface, slick and sly curved surface's cross sectional area orientation reduces gradually towards the direction of keeping away from drive assembly, glue core assembly's the other end and slick and sly curved surface looks butt, drive assembly is used for the drive to glue core assembly and glues core housing relatively and remove to the aperture of adjusting the through-hole.

Further, the rubber core assembly comprises a rubber core unit and a sliding block, one end of the sliding block is connected with the driving assembly, the other end of the sliding block corresponds to the rubber core unit, and the rubber core unit is abutted to the smooth curved surface.

Furthermore, the top surface of the rubber core unit is an arc-shaped surface, and the top surface of the rubber core unit is attached to the smooth curved surface.

Further, drive assembly includes hydraulic piston and drive short circuit, and hydraulic piston and drive short circuit set up in the shell body, and hydraulic piston can drive the drive short circuit and remove on the axis direction of shell body, and the drive short circuit can rotate relative to hydraulic piston, drive short circuit and gluey core subassembly drive connection.

Furthermore, one end of the outer shell is of an opening structure, and the rubber core assembly is arranged in the outer shell in a penetrating mode through the opening structure.

Further, rotatory preventer still includes pneumatic cylinder and the first clamp that surges, and the pneumatic cylinder is connected with the first clamp drive that surges, and the first clamp that surges sets up in open structure department, is provided with the recess on the outer wall of rubber core casing, and the recess corresponds the first clamp setting that surges.

Further, the rubber core shell comprises an upper shell and a lower shell which are detachably connected, and the smooth curved surface is arranged on the inner wall of the upper shell.

Furthermore, the rotary blowout preventer further comprises an anti-rotation structure, and the anti-rotation structure is arranged between the rubber core shell and the sliding block.

Further, the rotary blowout preventer further comprises sealing elements, and the sealing elements are arranged between the driving assembly and the outer shell and between the rubber core shell and the rubber core assembly.

Further, the rotary blowout preventer further includes a hydraulic line passing through the outer housing and in communication with the drive assembly.

Use the technical scheme of the utility model, this rotatory preventer includes shell body, glues core assembly and drive assembly. Wherein, glue the core assembly and rotationally wear to establish in the shell, glue the core assembly and include gluey core casing and gluey core subassembly, glue the core subassembly and set up in gluing the core casing, glue the core subassembly and have the through-hole, the through-hole is used for passing through and sealed drilling tool. Through setting up drive assembly in the shell, make drive assembly and gluey core assembly synchronous rotation, be connected drive assembly with the one end drive of gluing the core subassembly, because the inner wall of gluing the core casing has slick and sly curved surface, and slick and sly curved surface's cross sectional area orientation reduces gradually towards the direction of keeping away from drive assembly, again with the other end and the slick and sly curved surface looks butt of gluing the core subassembly, utilize drive assembly drive to glue the core subassembly and glue the core casing relatively and remove, can adjust the aperture of through-hole. By adopting the structure, when the composite drilling tool is encountered in an oil drilling site, the rubber core assembly is ensured to be attached to the drilling tool by utilizing the aperture of the driving assembly to adjust the through hole, so that the sealing effect can be ensured, the full-well-section pressure control in the tripping process can be realized, and the sealing requirement of the composite drilling tool can be met by the rotary blowout preventer.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a rotary blowout preventer according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. an outer housing; 20. a rubber core assembly; 21. a rubber core shell; 211. a smooth curved surface; 213. an upper shell; 214. a lower case; 22. a rubber core assembly; 221. a rubber core unit; 222. a slider; 30. a drive assembly; 31. a hydraulic piston; 50. a first hydraulic clamp; 60. sliding sealing; 70. a hydraulic line; 80. a fastener; 90. drilling tools; 100. driving a short circuit; 110. and a second hydraulic clamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, embodiments of the present invention provide a rotary blowout preventer including an outer housing 10, a rubber core assembly 20, and a drive assembly 30. Wherein, the rubber core assembly 20 is rotatably disposed in the outer casing 10, and the rubber core assembly 20 is used for sealing the drilling tool 90. Specifically, the rubber core assembly 20 includes a rubber core housing 21 and a rubber core component 22, the rubber core component 22 is disposed in the rubber core housing 21, and the rubber core component 22 has a through hole for passing and sealing the drilling tool 90. In the present embodiment, the driving component 30 is disposed in the outer housing 10, and the driving component 30 and the core assembly 20 rotate synchronously. Specifically, the driving assembly 30 is in driving connection with one end of the rubber core assembly 22, the inner wall of the rubber core housing 21 has a smooth curved surface 211, and the cross-sectional area of the smooth curved surface 211 gradually decreases toward a direction away from the driving assembly 30. Through the other end with gluey core subassembly 22 and smooth and rounded surface 211 looks butt, utilize drive assembly 30 drive gluey core subassembly 22 to remove relative gluey core casing 21, because smooth and rounded surface 211's cross sectional area orientation is kept away from drive assembly 30 direction and is reduced gradually, under drive assembly 30's pressure, gluey core subassembly 22 can take place deformation for the through-hole enlarges or reduces correspondingly, and then realizes the purpose of adjusting the through-hole aperture.

By applying the rotary blowout preventer provided by the embodiment, the driving assembly 30 is arranged in the outer shell 10, the smooth curved surface 211 is arranged on the inner wall of the rubber core shell 21, so that the cross-sectional area of the smooth curved surface 211 is gradually reduced towards the direction away from the driving assembly 30, then the driving assembly 30 is in driving connection with one end of the rubber core assembly 22, the other end of the rubber core assembly 22 is abutted against the smooth curved surface 211, and the aperture of the through hole of the rubber core assembly 22 can be adjusted under the driving of the driving assembly 30. When encountering the composite drilling tool 90 at the oil drilling site, the aperture of the through hole is adjusted by utilizing the driving assembly 30, the rubber core assembly 22 is ensured to be attached to the drilling tool 90, and the sealing effect can be ensured, so that the full-well-section pressure control in the tripping process can be realized, the rotary blowout preventer can meet the sealing requirement of the composite drilling tool, and the tripping of the composite drilling tool is realized. Moreover, the driving component 30 and the rubber core assembly 20 rotate synchronously, so that the driving component 30 is convenient to drive the rubber core assembly 20, and the driving component 30 and the rubber core assembly 20 are prevented from being worn.

As shown in fig. 1, the core assembly 22 includes a core unit 221 and a slider 222, one end of the slider 222 is connected to the driving assembly 30, the other end of the slider 222 is disposed corresponding to the core unit 221, and the core unit 221 abuts against the smooth curved surface 211. By adopting the above structure, the driving assembly 30 is utilized to drive the slider 222 to move in the rubber core shell 21, and the rubber core unit 221 can deform under the driving of the slider 222, so that the aperture of the through hole of the rubber core unit 221 can be adjusted.

The top surface of the rubber core unit 221 is an arc surface, and the top surface of the rubber core unit 221 is attached to the smooth curved surface 211. The top surface through gluing core unit 221 sets up to the arcwall face, and the gluey core unit 221 of being convenient for cooperatees with the rounding off curve, can guarantee the homogeneity that glues core unit 221 and warp, can guarantee the precision that the through-hole was adjusted. In this embodiment, the rubber core unit 221 has a hemispherical structure, and the top surface of the rubber core unit 221 is a hemispherical surface. In other embodiments, only the top surface of the rubber core unit 221 may be provided as an arc-shaped surface, and the lower portion of the rubber core unit 221 may be provided as a column.

As shown in fig. 1, the driving assembly 30 includes a hydraulic piston 31 and a driving sub 100, the hydraulic piston 31 and the driving sub 100 are disposed in the outer housing 10, the hydraulic piston 31 can drive the driving sub 100 to move in the axial direction of the outer housing 10, the driving sub 100 can rotate relative to the hydraulic piston 31, and the driving sub 100 is in driving connection with the glue core assembly 22. Specifically, the hydraulic piston 31 is connected to the slider 222 through a second hydraulic yoke.

In the embodiment, the hydraulic piston 31 only plays a role of pushing up and down, and a rotating mechanism is arranged at the joint of the driving short circuit 100 and the hydraulic piston 31, but the hydraulic piston 31 and the driving short circuit 100 cannot move up and down relatively. This avoids the problem of rotary seals, where the hydraulic piston 31 moves only up and down relative to the outer housing, without rotation. Specifically, the hydraulic piston 31 can move up and down under the driving of hydraulic oil, and the hydraulic piston 31 does not rotate, so that the sealing performance of the device can be ensured.

Wherein, be provided with spacing subassembly between drive short circuit 100 and the slider, drive short circuit 100 can rotate with the slider is synchronous. In this embodiment, the driving short circuit 100 is connected with the slider through the second hydraulic clamp 110, so as to ensure the sealing between the two. When the rubber core needs to be replaced, the second hydraulic clamping hoop 110 can be separated by opening the second hydraulic clamping hoop, and the rubber core is replaced more simply and conveniently.

In other embodiments, a bearing may be provided between the side wall of the hydraulic piston and the outer housing 10, which reduces the friction between the hydraulic piston and the outer housing 10, and facilitates the axial movement and rotation of the hydraulic piston relative to the outer housing 10.

As shown in fig. 1, one end of the outer casing 10 is an opening structure, and the rubber core assembly 20 is inserted into the outer casing 10 through the opening structure. Through setting up the one end of shell body 10 to open structure, be convenient for assemble gluey core assembly 20, can promote assembly efficiency, be convenient for maintain.

Concretely, rotatory preventer still includes pneumatic cylinder and the first clamp 50 that surges, and the pneumatic cylinder is connected with the first clamp 50 drive that surges, and first clamp 50 that surges sets up in open structure department, is provided with the recess on the outer wall of rubber core casing 21, and the recess corresponds the first clamp 50 setting that surges. In this embodiment, the first hydraulic clamp 50 is annularly disposed at the opening structure, and the groove is annularly disposed along the circumferential direction of the rubber core housing 21. Utilize pneumatic cylinder and the first clamp 50 matched with mode of surging to carry on spacingly to gluing core casing 21, be convenient for assemble.

As shown in fig. 1, the core housing 21 includes an upper housing 213 and a lower housing 214 detachably connected, and a smooth curved surface 211 is provided on an inner wall of the upper housing 213. By adopting the structure, the rubber core assembly 22 can be conveniently installed in the rubber core shell 21, the smooth curved surface 211 can be conveniently processed, and the processing cost can be reduced. Specifically, the upper case 213 and the lower case 214 are coupled by a fastener.

In order to prevent the slider 222 from rotating relative to the core housing 21, the rotary blowout preventer further includes an anti-rotation structure disposed between the core housing 21 and the slider 222. One of the slider 222 and the rubber core housing 21 is provided with an anti-rotation boss, and the other of the slider 222 and the rubber core housing 21 is provided with an anti-rotation groove, wherein the anti-rotation boss is slidably disposed in the anti-rotation groove. Specifically, the anti-rotation boss and the anti-rotation groove both extend along the axis direction of the rubber core assembly 20.

In the embodiment, the rotary blowout preventer further comprises a sealing element, and the sealing elements are arranged between the driving assembly 30 and the outer shell 10 and between the rubber core shell 21 and the rubber core assembly 22, so that the sealing performance of the rotary blowout preventer can be improved. Wherein the seal comprises a rotary seal and a sliding seal 60.

As shown in fig. 1, the rotary blowout preventer further includes a hydraulic line 70, the hydraulic line 70 passing through the outer housing 10 and communicating with the drive assembly 30. Specifically, a hydraulic line 70 passes through the outer housing 10 and communicates with the hydraulic piston 31.

In this embodiment, the outer housing 10 is fixedly connected to the wellhead by fasteners 80.

Through the device that this embodiment provided, when meetting composite drilling tool 90 at the oil drilling scene, through utilizing drive assembly 30 to adjust the aperture of through-hole, guarantee that rubber core subassembly 22 and drilling tool 90 are laminated mutually, can realize the whole well section accuse pressure in the tripping operation in-process. In addition, when the rubber core unit 221 of the rotary blowout preventer is worn, the diameter of the through hole of the rubber core unit 221 can be reduced by increasing hydraulic compensation, the replacement frequency of the rubber core unit 221 is reduced, and the cost can be reduced.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and 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 interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary blowout preventer, comprising:

an outer housing (10);

the rubber core assembly (20) is rotatably arranged in the outer shell (10) in a penetrating mode, the rubber core assembly (20) comprises a rubber core shell (21) and a rubber core component (22), the rubber core component (22) is arranged in the rubber core shell (21), and the rubber core component (22) is provided with a through hole which is used for allowing a drilling tool to pass through and sealing;

drive assembly (30), set up in shell body (10), drive assembly (30) with glue core assembly (20) synchronous revolution, drive assembly (30) with the one end drive of gluing core assembly (22) is connected, the inner wall of gluing core casing (21) has rounding off curve (211), rounding off curve (211)'s cross sectional area orientation is kept away from drive assembly (30)'s direction reduces gradually, glue core assembly (22) the other end with rounding off curve (211) looks butt, drive assembly (30) are used for the drive it is relative to glue core assembly (22) glue core casing (21) and remove, in order to adjust the aperture of through-hole.

2. The rotary blowout preventer according to claim 1, wherein the glue cartridge assembly (22) comprises a glue cartridge unit (221) and a slider (222), one end of the slider (222) is connected with the driving assembly (30), the other end of the slider (222) is arranged corresponding to the glue cartridge unit (221), and the glue cartridge unit (221) abuts against the smooth curved surface (211).

3. The rotary blowout preventer according to claim 2, wherein the top surface of the rubber core unit (221) is an arc-shaped surface, and the top surface of the rubber core unit (221) is attached to the smoothly curved surface (211).

4. The rotary blowout preventer according to claim 1, wherein the drive assembly (30) comprises a hydraulic piston (31) and a drive sub (100), the hydraulic piston (31) and the drive sub (100) being arranged in the outer housing (10), the hydraulic piston (31) being capable of driving the drive sub (100) to move in the axial direction of the outer housing (10), the drive sub (100) being rotatable relative to the hydraulic piston (31), the drive sub (100) being in driving connection with the glue cartridge assembly (22).

5. The rotary blowout preventer according to claim 1, wherein one end of the outer housing (10) is an open structure through which the cartridge assembly (20) is inserted into the outer housing (10).

6. The rotary blowout preventer according to claim 5, further comprising a hydraulic cylinder and a first hydraulic clamp (50), wherein the hydraulic cylinder is in driving connection with the first hydraulic clamp (50), the first hydraulic clamp (50) is disposed at the opening structure, and a groove is disposed on an outer wall of the rubber core housing (21) and corresponds to the first hydraulic clamp (50).

7. The rotary blowout preventer according to claim 1, wherein the cartridge housing (21) comprises an upper shell (213) and a lower shell (214) which are detachably connected, the smoothly curved surface (211) being provided on an inner wall of the upper shell (213).

8. The rotary blowout preventer according to claim 2, further comprising an anti-rotation structure disposed between the cartridge housing (21) and the slider (222).

9. The rotary blowout preventer according to claim 1, further comprising seals, which are provided both between the drive assembly (30) and the outer housing (10) and between the core housing (21) and the core assembly (22).

10. The rotary blowout preventer according to claim 1, further comprising a hydraulic line (70), the hydraulic line (70) passing through the outer housing (10) and communicating with the drive assembly (30).