Environment-friendly rotary blowout preventer

Abstract

The utility model discloses an environment-friendly rotary blowout preventer, and belongs to the technical field of petroleum machinery. The blowout preventer comprises a shell assembly, a rotating assembly, a hoop assembly and a liquid collecting assembly, the liquid collecting assembly comprises a liquid collecting disc, the liquid collecting disc is arranged at the top of the hoop assembly, and a center hole is formed in the position, corresponding to a penetrating hole of the rotating assembly, of the center of the bottom of the liquid collecting disc; the multiple catch tray fixing pieces are arranged at intervals in the circumferential direction of the catch tray, each catch tray fixing piece comprises a connecting plate and a limiting block, the connecting plate is fixed to the bottom of the catch tray, and the inner ring wall of the hoop assembly is provided with a vertically-through penetrating notch corresponding to the connecting plate; the lower end of the connecting plate penetrates through the through notch and extends to the position below the clamp assembly. The limiting block is fixed to the bottom of the connecting plate and clamped and matched with the limiting groove. The rotating assembly is sleeved with the liquid collecting disc, and the liquid collecting disc is fixed to the shell assembly through a liquid collecting disc fixing piece so as to collect overflowed or scattered mud and prevent the mud from falling to a well mouth and polluting the well mouth environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum machinery technical field more specifically relates to a kind of environmental protection type rotary blowout preventer. BACKGROUND

[0002] Rotary blowout preventer is widely used in modern drilling, and is the key equipment of pressure control drilling and underbalanced drilling. When working, it is used to seal the drilling tools in the well. In the normal drilling process, mud overflow is inevitable, and mud will be spilled during tripping. The spilled mud will gather around the wellhead, polluting the wellhead environment and posing a safety hazard. Therefore, higher requirements are placed on the environmental protection of rotary blowout preventers.

[0003] Therefore, how to provide an environmental protection type rotary blowout preventer that can prevent mud from polluting the wellhead is a problem that needs to be solved by those skilled in the art. SUMMARY

[0004] Therefore, the utility model aims to provide an environmental protection type rotary blowout preventer to at least partially solve the problem of mud easily falling near the wellhead and polluting the wellhead environment in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] An environmental protection type rotary blowout preventer comprises a housing assembly, a rotating assembly, a clamp assembly and a liquid collecting assembly. The housing assembly has a rotating assembly through hole at the top. The rotating assembly extends into the inner cavity of the housing assembly through the rotating assembly through hole. The clamp assembly is installed at the top of the housing assembly to lock the lower part of the rotating assembly. The liquid collecting assembly comprises:

[0007] A liquid collecting disc is placed on the top of the clamp assembly and has a central hole at the center corresponding to the rotating assembly through hole. The lower part of the rotating assembly extends into the inner cavity of the housing assembly through the central hole.

[0008] A plurality of liquid collecting disc fixing members are arranged along the circumferential direction of the liquid collecting disc. Each liquid collecting disc fixing member comprises a connecting plate and a limiting block. The connecting plate is fixed to the bottom of the liquid collecting disc. A through slot is formed in the inner wall of the clamp assembly corresponding to the connecting plate. The lower end of the connecting plate extends below the clamp assembly through the through slot. A limiting slot is formed in the outer wall of the housing assembly corresponding to each connecting plate. The limiting block is fixed to the bottom of the connecting plate and is in engagement with the limiting slot.

[0009] The utility model discloses a beneficial effect that can be realized: the liquid collecting tray is sleeved on the outside of the rotating assembly and is fixed on the shell assembly through the liquid collecting tray fixing part to collect the mud that spills or falls, prevent the mud from falling in the well mouth and polluting the well mouth environment.

[0010] Preferably, a sealing ring is arranged on the outer side wall of the rotating assembly and is sealingly connected to the inner wall of the central hole.

[0011] Preferably, a guide outlet is arranged at the lower end of the side wall of the liquid collecting tray, and a flow guide pipe is connected to the guide outlet.

[0012] Preferably, the diameter of the central hole is smaller than the diameter of the perforation of the rotating assembly.

[0013] Preferably, a plurality of positioning columns are fixed to the top of the clamp assembly, and a positioning groove is arranged in the bottom of the liquid collecting tray corresponding to each positioning column.

[0014] Preferably, the limiting block is fixed in the limiting groove through a fastening screw.

[0015] Preferably, a protective cover is further arranged, which is fixed to the top of the liquid collecting tray and covers the rotating assembly, and a flow guide gap is arranged between the inner side wall of the protective cover and the outer wall of the rotating assembly.

[0016] Preferably, the inner diameter of the protective cover is smaller than the inner diameter of the disc opening of the liquid collecting tray.

[0017] Preferably, a plurality of threading openings are arranged at the lower part of the side wall of the protective cover in the circumferential direction.

[0018] Preferably, a plurality of lifting rings are hingedly arranged on the outer side wall of the upper end of the protective cover in the circumferential direction.

[0019] Compared with the prior art, the utility model discloses an environment-friendly rotary blowout preventer, and the liquid collecting assembly is designed in a modular manner and can be applied to various rotary blowout preventers. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only embodiments of the utility model, and those skilled in the art can obtain other drawings according to the provided drawings without any creative labor.

[0021] Figure 1 A three-dimensional structure schematic diagram of the environment-friendly rotary blowout preventer is provided in the utility model.

[0022] Figure 2 A right section schematic diagram of the environment-friendly rotary blowout preventer is provided in the utility model.

[0023] Figure 3 A front section schematic diagram of the environment-friendly rotary blowout preventer is provided in the utility model.

[0024] Figure 4 A section schematic diagram of the environment-friendly rotary blowout preventer without a rotary assembly is provided in the utility model.

[0025] Figure 5 An explosion structure diagram of the environment-friendly rotary blowout preventer without a rotary assembly is provided in the utility model.

[0026] In the figure: 1, shell assembly, 11, rotary assembly perforation, 12, limiting groove, 2, rotary assembly, 3, clamp assembly, 31, slot opening, 4, liquid collection assembly, 41, liquid collection disc, 411, center hole, 412, guide outlet, 413, positioning groove, 42, liquid collection disc fixing part, 421, connecting plate, 422, limiting block, 5, sealing ring, 51, protection ring, 6, flow guide pipe, 7, positioning column, 8, fastening screw, 9, protective cover, 91, mounting ring, 92, reinforcing rib, 93, protective cylinder, 931, threading opening, 10, lifting ring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0028] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Please see Figures 1-5 This utility model discloses an environmentally friendly rotary blowout preventer, including a housing assembly 1, a rotary assembly 2, a clamp assembly 3, and a liquid collection assembly 4. The housing assembly 1 has a rotary assembly through-hole 11 at its top. The lower part of the rotary assembly 2 extends through the rotary assembly through-hole 11 into the inner cavity of the housing assembly 1. The clamp assembly 3 is installed on the top of the housing assembly 1 to lock the lower part of the rotary assembly 2. The liquid collection assembly 4 includes:

[0031] A liquid collection tray 41 is placed on the top of the clamp assembly 3 and a central hole 411 is provided at its center corresponding to the through hole 11 of the rotating assembly. The lower part of the rotating assembly 2 extends through the central hole 411 into the inner cavity of the housing assembly 1.

[0032] Multiple liquid collection tray fixing components 42 are arranged at intervals along the circumferential direction of the liquid collection tray 41. Each liquid collection tray fixing component includes a connecting plate 421 and a limiting block 422. The connecting plate 421 is fixed to the bottom of the liquid collection tray 41. A through slot 31 is opened on the inner ring wall of the clamp assembly 3 corresponding to the connecting plate 421. The lower end of the connecting plate 421 extends through the through slot 31 to the bottom of the clamp assembly 3. A limiting groove 12 is opened on the outer wall of the housing assembly 1 corresponding to each connecting plate 421. The limiting block 422 is fixed to the bottom of the connecting plate 421 and engages with the limiting groove 12.

[0033] The collecting pan 41 can be fitted onto the outside of the rotating assembly 2 and fixed to the housing assembly 1 by the collecting pan fixing member 42 to collect overflowing or spilled mud and prevent mud from falling into the wellhead and polluting the wellhead environment.

[0034] In one specific embodiment, a sealing ring 5 is provided on the outer wall of the rotating assembly 2, which is sealed to the inner wall of the central hole 411. Multiple sealing rings 5 ​​can be provided to prevent the mud collected by the collecting tray 41 from leaking.

[0035] In one specific embodiment, an outlet 412 is provided at the lower end of the side wall of the liquid collection tray 41, and a guide pipe 6 is connected to the outlet 412. A quick connector 61 is installed at the other end of the guide pipe 6 to facilitate quick connection to an external mud treatment device.

[0036] In a specific embodiment, the aperture of the central hole 411 is smaller than the aperture of the rotating assembly through hole 11. If the sealing ring 5 is not installed or damaged, etc., causing mud leakage, the leaked mud can be guided to flow back into the well through the rotating assembly through hole 11.

[0037] In a specific embodiment, a plurality of positioning columns 7 are fixed on the top of the clamp assembly 3, and a positioning groove 413 corresponding to each positioning column 7 is formed on the bottom of the liquid collecting disc 41. Figure 5 As shown, two liquid collecting disc fixing members 42 correspond to the front and rear sides of the liquid collecting disc, respectively, and two positioning columns 7 correspond to the left and right sides of the liquid collecting disc 41, respectively. The line connecting the two liquid collecting disc fixing members 42 is perpendicular to the line connecting the two positioning columns 7, so as to further limit the liquid collecting disc 41 and strengthen the firmness of the installation of the liquid collecting disc 41.

[0038] In a specific embodiment, the limiting block 422 is fixed in the limiting groove 12 through a fastening screw 8, which strengthens the connection strength between the limiting block 422 and the shell assembly 1. A screw sleeve is sleeved on the fastening screw 8, which strengthens the firmness of the installation of the fastening screw 8.

[0039] In a specific embodiment, a protective cover 9 is also provided, which is fixed on the top of the liquid collecting disc 41 and covers the outer peripheral side of the rotating assembly 2. The inner side wall of the protective cover 9 has a flow guiding gap with the outer wall of the rotating assembly 2. The protective cover 9 can collect the splashed mud and guide the mud into the liquid collecting disc 41 through the flow guiding gap.

[0040] In a specific embodiment, the protective cover 9 has a cage structure, which includes a mounting ring 91, a plurality of reinforcing ribs 92, and a protective cylinder 93. The mounting ring 91 is fixed on the top of the liquid collecting disc 41 through a plurality of screws. The plurality of reinforcing ribs 92 are arranged circumferentially and fixed on the top of the mounting ring 91. The protective cylinder 93 corresponds to the outer peripheral side of the rotating assembly 2 and is connected with the reinforcing ribs 92. The inner wall of the protective cylinder 93 has a flow guiding gap with the outer side wall of the rotating assembly 2, and the inner diameter of the protective cylinder 93 is smaller than the inner diameter of the mounting ring 91 and the disc opening of the liquid collecting disc 41, so that the mud can fall into the liquid collecting disc 41. The gap between the bottom of the protective cylinder 93 and the mounting ring 91 forms a threading opening 931, which is beneficial for the liquid control pipeline of the rotating assembly 2 to pass through and disassemble. The top of the protective cylinder 93 extends above the rotating assembly 2 to prevent the mud from splashing out of the liquid collecting disc 41. The reinforcing ribs 92 or the protective cylinder 93 are hingedly connected with a lifting ring 10 at the upper end, which is convenient for lifting.

[0041] As shown, two liquid collecting disc fixing members 42 correspond to the front and rear sides of the liquid collecting disc, respectively, and two positioning columns 7 correspond to the left and right sides of the liquid collecting disc 41, respectively. The line connecting the two liquid collecting disc fixing members 42 is perpendicular to the line connecting the two positioning columns 7, so as to further limit the liquid collecting disc 41 and strengthen the firmness of the installation of the liquid collecting disc 41. Figure 4As shown, when the blowout preventer is in operation, most of the mud dripping from the drilling tool will directly enter the wellbore, and the mud not falling into the wellbore will be collected by the protective cover 9 and the liquid collecting disc 41. Since the aperture size of the central hole 411 of the liquid collecting disc 41 is smaller than the size of the rotating assembly perforation 11 at the top of the shell assembly 1, if the falling mud is not collected by the liquid collecting disc 41, it will directly fall into the wellbore or flow back into the well through the rotating assembly perforation 11, and will not spill outside the blowout preventer.

[0042] The liquid collecting assembly 4 is designed in a modular manner, and can be used on the original blowout preventer or in a newly manufactured rotary blowout preventer. During drilling, the mud overflowing from the top of the rotary blowout preventer and being thrown out by centrifugal force will be intercepted by the protective cover and collected by the liquid collecting disc. The mud spilled during tripping can also be introduced into the wellhead or collected, and the collected mud is orderly introduced to the external mud treatment device through the mud flow guide pipe, effectively avoiding mud spilling and protecting the environment around the wellhead.

[0043] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0044] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An environmentally friendly rotary blowout preventer, comprising a housing assembly (1), a rotary assembly (2), a clamp assembly (3) and a liquid collection assembly (4), a rotary assembly through hole (11) is formed in the top of the housing assembly (1), the lower part of the rotary assembly (2) extends into the inner cavity of the housing assembly (1) through the rotary assembly through hole (11), and the clamp assembly (3) is installed on the top of the housing assembly (1) to lock the lower part of the rotary assembly (2); characterized in that, The liquid collecting assembly (4) comprises: A liquid collecting disc (41) is arranged on the top of the clamp assembly (3) and has a central hole (411) in the center corresponding to the rotating assembly through hole (11), and the lower part of the rotating assembly (2) extends through the central hole (411) into the inner cavity of the shell assembly (1); A plurality of liquid collecting disc fixing members (42) are arranged in the circumferential direction of the liquid collecting disc (41), each of which comprises a connecting plate (421) and a limiting block (422), the connecting plate (421) is fixed on the bottom of the liquid collecting disc (41), the clamp assembly (3) has a through slot (31) on the inner wall corresponding to the connecting plate (421), and the lower end of the connecting plate (421) extends below the clamp assembly (3) through the through slot (31); the limiting groove (12) is arranged on the outer side wall of the shell assembly (1) corresponding to each connecting plate (421), and the limiting block (422) is fixed on the bottom of the connecting plate (421) and is connected with the limiting groove (12).

2. The environment-friendly rotary blowout preventer according to claim 1, characterized in that, The outer side wall of the rotating assembly (2) is provided with a sealing ring (5) in sealing connection with the inner wall of the central hole (411).

3. The environmentally friendly swivel blowout preventer of claim 1, wherein, The lower end of the side wall of the liquid collecting disc (41) is provided with a guide outlet (412), and the guide outlet (412) is connected with a guide pipe (6).

4. The environmentally friendly swivel blowout preventer of claim 1, wherein, The aperture of the central hole (411) is smaller than the aperture of the rotating assembly through hole (11).

5. The environmentally friendly swivel blowout preventer of claim 1, wherein, The top of the clamp assembly (3) is fixed with a plurality of positioning columns (7), and the bottom of the liquid collecting disc (41) is provided with a positioning groove (413) corresponding to each positioning column (7) and connected with the positioning column (7).

6. The environmentally friendly swivel blowout preventer of claim 1, wherein, The limiting block (422) is fixed in the limiting groove (12) by a fastening screw (8).

7. The environmentally friendly swivel blowout preventer of claim 1, wherein, A protective cover (9) is further arranged, which is fixed on the top of the liquid collecting disc (41) and covers the outer circumferential side of the rotating assembly (2), and the inner side wall of the protective cover (9) has a flow guiding gap with the outer wall of the rotating assembly (2).

8. The environment-friendly swivel blowout preventer according to claim 7, characterized in that, The inner diameter of the protective cover (9) is smaller than the inner diameter of the disc opening of the liquid collecting disc (41).

9. The environment-friendly swivel preventer of claim 7, wherein, A plurality of wire passing openings (931) are arranged in the circumferential direction of the lower part of the side wall of the protective cover (9).

10. The environmentally friendly swivel preventer of claim 7, wherein, A plurality of lifting rings (10) are hingedly connected to the outer side wall of the upper end of the protective cover (9) in the circumferential direction.

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