CN2764928Y - Well mouth sleeve sealing deivce - Google Patents
Well mouth sleeve sealing deivce Download PDFInfo
- Publication number
- CN2764928Y CN2764928Y CN 200420085313 CN200420085313U CN2764928Y CN 2764928 Y CN2764928 Y CN 2764928Y CN 200420085313 CN200420085313 CN 200420085313 CN 200420085313 U CN200420085313 U CN 200420085313U CN 2764928 Y CN2764928 Y CN 2764928Y
- Authority
- CN
- China
- Prior art keywords
- main body
- well
- plug
- sealing
- well head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a well mouth sleeve sealing device used in the field of oil production for solving the problems of well sealing and theft prevention of discontinued wells. The utility model comprises a main body, a check valve and a screwed plug, wherein the main body is a hollow component and is installed in a coupling at the top of a sleeve through outer screw threads, and the lower end of an inner hole of the main body is connected with the upwards sealed check valve to form a primary seal; screw threads of the middle part of the main body are connected with the screwed plug to form a secondary seal; a cover board inlaid into the top of the main body for sealing the top part of the main body is also arranged above the screwed plug to protect a well mouth from stealing and opening. When the well mouth is opened newly, the operation of unsealing with pressure can be obtained by an unseal pup joint in a controlled state, and the check valve is opened to carry out the operation of pressure testing, air discharging and well killing.
Description
(1) technical field
The utility model relates to that a kind of geological prospecting and field of petroleum exploitation use, the shut-in well instrument that the well head sleeve pipe is controlled.
(2) background technology
No matter be geological prospecting or oil drilling, after drilling well is finished, all will be lowered to sleeve pipe usually, and by well cementation, with cement together stratum and casing cement, so that oily, well are controlled by the well control device that is installed in cannula tip.In the management afterwards, often need be to some inactive wells, abandoned well carries out short-term or long-term shut-in well, avoid junk to fall in the well on the one hand, safeguard that oil well is intact, avoid oil well on the other hand between lay-off period, because of changing, strata pressure causes blowout out of control, contaminated environment.
Usually the way that adopts well head to keep production tree to the well of stopping using is carried out well control before.Because these inactive wells generally can not blowing, between lay-off period, the metal parts that can lay down on the production tree is usually discharged by the fellow-villager, and what you adorn, and what he unloads, and the last only remaining well head that exposes is out of hand.This pilferage destroys a great problem that has become well control work.
Chinese patent: ZL 02267947.2 discloses " a kind of sunk blowout preventer " utility model patent, is intended to provide a kind of and can prevents tree-protector artificial or that natural cause is destroyed." the New-type bifunctional well head blowout preventer " that deliver this patent and 2003 the 31st volume the 6th phase " petroleum machinery " belongs to a kind of well head sleeve pipe shut-in well device.The fixed cover of this device is installed on the casing coupling by external screw thread, in the fixed cover upper end silk pressing is housed, and screws valve for preventing illagel application is installed on silk pressing, and screws valve for preventing illagel application is opened with special spanner.She Ji shortcoming is like this: anyone does not need special spanner, and with once can laying down silk pressing to common pipe wrench, the screws valve for preventing illagel application that is mounted thereon has also just been laid down together, does not have antitheft effect at all.
(3) summary of the invention
The purpose of this utility model will realize that exactly a kind of structure is more simple, and ordinary person can not dismantle with the common manual instrument, antitheft more reliable well head sleeve pipe shut-in well device.
The purpose of this utility model is achieved in that a kind of well head sleeve pipe blowout preventer, the main body that comprises hollow, ball-and-seat and plug, the external screw thread that is connected with casing coupling is arranged at main body top, there is internal thread at main body endoporus middle part, it is characterized in that: the internal thread of main body is connected with plug, also has a cover plate that embeds the main body top above plug, and main body endoporus lower end is connected with the ball-and-seat of upwards sealing.
Owing to adopt said structure, the cover plate that embeds the main body top is completely enclosed within plug in the main body, cover plate is above to can be tool operation without any raised structures, anyone can not open cover plate with general tool, the dismounting plug, open well head, thereby when simplifying the blowout preventer structure, strengthened its anti-theft feature.
(4) description of drawings
Fig. 1 is the utility model shut-in well view;
Fig. 2 is the utility model deblocking view.
Among the figure: 1. casing coupling, 2. main body, 3. external screw thread, 4. plug, 5. cover plate, 6. columnar protrusions, 7. driving hole, 8. internal thread, 9. sealing bore, 10. ball-and-seat, 11. valves (signal), 12. deblocking pipe nipples, 13. sealing rings, 14. push rods.
(5) specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing: Fig. 1 is an embodiment of well head sleeve pipe blowout preventer, comprises the main body (2) of hollow, ball-and-seat (10) and plug (4).The external screw thread (3) that is connected with casing coupling (1) is arranged at main body (2) top, main body (2) is screwed into casing coupling (1) after, the main body upper surface is concordant substantially with casing coupling.Main body (2) endoporus lower end is connected with the ball-and-seat of upwards sealing, constitutes the sealing of first road, and ball-and-seat (10) can be spherical ball-and-seat, also can be the taper ball-and-seat.There is internal thread (8) at main body (2) endoporus middle part, is connected with plug (4), constitutes the sealing of second road, and plug (4) has its spanner Fang Jing.The cover plate (5) that also has a sealing main body top in plug (4) top, embed main body (2) top, concordant substantially with the main body top, main body (2) can seal with sealing ring with cover plate (5) junction, cover plate is above to can be tool operation without any raised structures, opens with the common manual instrument so can prevent people.In the below of main body (2) with cover plate (5) embedding section, have the polygon driving hole (7) that main body is used is installed, be closed in below the cover plate (5).
For antitheft better, in the upper end of plug (4) columnar protrusions (6) can be arranged, a hole of matching with the columnar protrusions (6) of plug (4) can be arranged on cover plate (5), when cover plate is installed, cover plate and plug are connected into an integral body in the joint portion with bonding or welding method.
When needs are opened well head, must on the cover board weld a pipe nipple, with pipe wrench cover plate (5) and plug (4) are laid down, again as shown in Figure 2, deblocking pipe nipple (12) is screwed into the internal thread (8) of main body (2), push rod (14) until deblocking pipe nipple (12) lower end backs down ball-and-seat (10), and deblocking pipe nipple (12) is communicated with the down-hole.Because deblocking pipe nipple (12) upper end is connecting valve (11), thus can make oil well be in slave mode, and can further finish pressure measurement, venting, kill job.
Main body (2) can have one section sealing bore (9) between internal thread (8) and ball-and-seat (10), with sealing ring (13) fitted seal on the deblocking pipe nipple (12), like this when push rod (14) backs down ball-and-seat (10), borehole pressure just can not leak from the deblocking pipe nipple (12) and the joint portion of internal thread (8), thereby is implemented in band pressure deblocking under the sealing state.
Claims (5)
1. well head sleeve pipe blowout preventer, the main body (2) that comprises hollow, ball-and-seat (10) and plug (4), the external screw thread (3) that is connected with casing coupling (1) is arranged at main body (2) top, there is internal thread (8) at main body (2) endoporus middle part, it is characterized in that: the internal thread (8) of main body (2) is connected with plug (4), also has a cover plate (5) that embeds main body (2) top in plug (4) top, and main body (2) endoporus lower end is connected with the ball-and-seat (10) of upwards sealing.
2. well head sleeve pipe blowout preventer according to claim 1 is characterized in that: can there be a columnar protrusions (6) plug (4) upper end.
3. according to claim 1 and the described well head sleeve pipe of claim 2 blowout preventer, it is characterized in that: cover plate (5) can have a hole of matching with the columnar protrusions (6) of plug (4) upper end.
4. well head sleeve pipe blowout preventer according to claim 1 is characterized in that: main body (2) can have sealing bore (9) between internal thread (8) and ball-and-seat (10).
5. well head sleeve pipe blowout preventer according to claim 1 is characterized in that: main body (2) can have polygon driving hole (7) with the below that cover plate (5) embeds section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420085313 CN2764928Y (en) | 2004-11-09 | 2004-11-09 | Well mouth sleeve sealing deivce |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420085313 CN2764928Y (en) | 2004-11-09 | 2004-11-09 | Well mouth sleeve sealing deivce |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2764928Y true CN2764928Y (en) | 2006-03-15 |
Family
ID=36167847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420085313 Expired - Fee Related CN2764928Y (en) | 2004-11-09 | 2004-11-09 | Well mouth sleeve sealing deivce |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2764928Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703736A (en) * | 2017-03-20 | 2017-05-24 | 大庆东达节能技术开发服务有限公司 | Anti-theft and pressure maintaining well sealing device for oil field |
| CN117307079A (en) * | 2023-11-28 | 2023-12-29 | 大庆市归藏石油科技有限公司 | Antitheft blowout preventer capable of implementing monitoring and pressure relief of natural gas and pressure in well |
-
2004
- 2004-11-09 CN CN 200420085313 patent/CN2764928Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703736A (en) * | 2017-03-20 | 2017-05-24 | 大庆东达节能技术开发服务有限公司 | Anti-theft and pressure maintaining well sealing device for oil field |
| CN117307079A (en) * | 2023-11-28 | 2023-12-29 | 大庆市归藏石油科技有限公司 | Antitheft blowout preventer capable of implementing monitoring and pressure relief of natural gas and pressure in well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060315 Termination date: 20101109 |