CN105350935A - Blocking structure of antitheft sleeve pipe - Google Patents
Blocking structure of antitheft sleeve pipe Download PDFInfo
- Publication number
- CN105350935A CN105350935A CN201510749847.4A CN201510749847A CN105350935A CN 105350935 A CN105350935 A CN 105350935A CN 201510749847 A CN201510749847 A CN 201510749847A CN 105350935 A CN105350935 A CN 105350935A
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- cover plate
- pressure release
- casing
- blocking valve
- 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.)
- Granted
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
- E21B33/1216—Anti-extrusion means, e.g. means to prevent cold flow of rubber packing
Abstract
The invention discloses a blocking structure of an antitheft sleeve pipe. The blocking structure comprises a sleeve pipe flange, a cover plate, a sleeve pipe and an automatic pressure release block valve. The sleeve pipe flange is fixed at the upper end of the sleeve pipe. The cover plate can be detachably fixed on the top surface of the sleeve pipe and sealed. The automatic pressure release block valve is mounted into the sleeve pipe. The cover plate is internally provided with a pressure release channel communicated with the sleeve pipe. The blocking structure of the antitheft sleeve pipe has following beneficial effects: devices above the sleeve pipe flange are removed; the sleeve pipe is internally provided with the block valve; the cover plate is installed on an original sleeve pipe flange and externally connected with a release pipeline to the designated position; the landform is restored; due to overpressure and automatic pressure release of a shaft, a shaft mouth is prevented from being damaged during shaft shutting; blowout, ignition and environment pollution are avoided; safety hazards are reduced; and the shaft is conveniently reutilized.
Description
Technical field
The present invention relates to natural gas well production gas technology field, particularly relate to a kind of Anti-theft casing blockage structure.
Background technology
Along with becoming increasingly active of petroleum natural gas exploration activity, Exploration Domain is from land to ocean, from shallow stratum to deep formation, rapid extension from old liberated area to new district, exploration and development technology has had the development of making rapid progress, simultaneously, in order to avoid with the massive losses reducing blowout and blowout out of control and cause, the drilling well control technology of China obtains and develops faster, but on well control technique, still there is many problems. safety in production is the basic guarantee realizing economic benefit, at present at oil-water well and the natural gas well temporarily without productive value or closed without needing to carry out a middle or short term to oil-water well and the natural gas well during working condition temporarily, but be difficult to recover landforms and observe its pressure or releasing pressure automatically when well cylinder pressure superpressure, and exist by the security risk of artificial destruction.
Summary of the invention
In view of this, the object of this invention is to provide a kind of Anti-theft casing blockage structure, effectively can prevent artificial destruction, reduce security risk.
Anti-theft casing blockage structure of the present invention, comprise casing flange, cover plate, sleeve pipe and automatic decompression type blocking valve, described casing flange is fixed on sleeve upper end; Cover plate is removable to be fixed on casing flange end face and to seal; Described automatic decompression type blocking valve is installed in sleeve pipe; The pressure release passage be connected with sleeve pipe is provided with in cover plate;
Further, described automatic decompression type blocking valve is the Y422-114 type blocking valve adopting level pressure one way valve to substitute dead plug;
Further, the relief tube also comprising the pressure release passage being connected to cover plate and the valve body for pressure release be fixed in relief tube;
Further, sealed between described cover plate and casing flange by ring gasket, cover plate bottom surface and the corresponding ring gasket of casing flange end face are equipped with annular groove; Cover plate and casing flange are connected and fixed by bolt and nut pair.
The invention has the beneficial effects as follows: Anti-theft casing blockage structure of the present invention, remove the above device of casing flange, install blocking valve in sleeve pipe, cover plate installed by tunica pipe flange, and external pipeline of letting out is to appointed place, recover landforms, pit shaft superpressure releasing pressure automatically, avoids well shut-in period well head to be destroyed, and without blowout, catches fire and environmental pollution accident generation, reduce security risk, recycling pit shaft is convenient.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is automatic decompression type blocking valve structural representation;
Fig. 3 is level pressure one-way valve structures schematic diagram.
Detailed description of the invention
Fig. 1 is structural representation of the present invention; Fig. 2 is automatic decompression type blocking valve structural representation; Fig. 3 is level pressure one-way valve structures schematic diagram, and as shown in the figure: the Anti-theft casing blockage structure of the present embodiment, comprise casing flange 26, cover plate 27, sleeve pipe 28 and automatic decompression type blocking valve, described casing flange 26 is fixed on sleeve pipe 28 upper end; Cover plate 27 is removable to be fixed on casing flange 26 end face and to seal; Described automatic decompression type blocking valve is installed in sleeve pipe 28; The pressure release passage 29 be connected with sleeve pipe 28 is provided with in cover plate 27; Casing flange 26 is in well head place, earth's surface, realizes down-hole and closes, remove casing flange more than 26 device by installation blocking valve in sleeve pipe 28, well shut-in period well head is avoided to be destroyed, without blowout, catch fire and environmental pollution accident generation, reduce security risk, recycling pit shaft is convenient.
In the present embodiment, described automatic decompression type blocking valve is the Y422-114 type blocking valve adopting level pressure one way valve to substitute dead plug, Y422-114 type blocking valve is prior art, automatic decompression type blocking valve is improved by Y422-114 type blocking valve, automatic decompression type blocking valve comprises central tube 1, brake pad traction body 2, traction body pressure cap 3, back-moving spring 4, wiper block 5, traction body retainer spring 6, slip sleeve 7, anti-rotational screw 8, upper cone 9, slips 10, wiper block back-moving spring 11, setting solution nail 12, lower cone 13, spacer ring 14, packing element 15, packing element cover 16, sleeve stop screw 17, lower lead ring 18, baffle ring 19, lower tight dog screw 20, lower contact 21, deblocking shear pin 22, level pressure one way valve 23 and pressure cap 24, sleeve pipe 28 is connected with tubing seal, fetch and deliver joint 25 to be connected with oil pipe, fetch and deliver joint 25 to be connected with center-pole 1, with crane or workover rig, automatic decompression type blocking valve is fed through desired depth, clamp oil pipe anticlockwise 10 ~ 13 with torque spanner and enclose (about 1050Nm), blocking valve is sat card and is set, transfer dextrorotation 1/4 to enclose, give up and trip out setting instrument, casing flange 26 is installed cover plate 27, and install ring gasket 30 additional, use bolton again, pressure release passage 29 connects relief tube to appointed place, when re-using this well, first in sleeve pipe 28, inject high pressure (being greater than strata pressure) clear water from the pressure relief opening of cover plate 27 the level pressure one way valve 23 of automatic decompression type blocking valve shot down to work hard in glove with pit shaft, let out borehole pressure again to 0MPa, or in well, inject well killing fluid kill-job to balance, observe 30min without after the medium that leaks, remove cover plate 27, enter fishing tool down to be again connected with blocking valve, unfreezing deblocking is enclosed with torque spanner right rotation 10 ~ 13, trip out blocking valve and carry out lower step process operation, described level pressure one way valve comprises spring base 31, spring 32, steel ball 33 and ball seat 34, what ball seat 34 was removable is fixed on the space that spring base 31 one end makes spring base 31 inside formation accommodation spring 32 and steel ball 33, ball seat 34 is provided with the hole be communicated with this space, steel ball 33 and spring 32 are installed in this space and dry bulb is pressed in the sealing of this hole place by spring 32, and spring base 31 is provided with the passage be connected with above-mentioned space, when utilizing the cooperation of spring and steel ball to make to reach certain pressure in well, Compress Spring is by valve open, and after pressure release, steel ball automatically resets.
In the present embodiment, the relief tube also comprising the pressure release passage 29 being connected to cover plate 27 and the valve body for pressure release be fixed in relief tube; Relief tube is provided with pressure meter, be convenient to observe its internal pressure, valve body is another one way valve oppositely installed with the level pressure one way valve of automatic decompression type blocking valve, controls this valve body open in the mode of Non-follow control, and then carry out pressure release as required, safeguards system safety.
In the present embodiment, sealed between described cover plate 27 and casing flange 26 by ring gasket 30, cover plate 27 bottom surface and the corresponding ring gasket 30 of casing flange 26 end face are equipped with annular groove; Cover plate 27 and casing flange 26 are connected and fixed by bolt and nut pair.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (4)
1. an Anti-theft casing blockage structure, is characterized in that: comprise casing flange, cover plate, sleeve pipe and automatic decompression type blocking valve, described casing flange is fixed on sleeve upper end; Cover plate is removable to be fixed on casing flange end face and to seal; Described automatic decompression type blocking valve is installed in sleeve pipe; The pressure release passage be connected with sleeve pipe is provided with in cover plate.
2. Anti-theft casing blockage structure according to claim 1, is characterized in that: described automatic decompression type blocking valve is the Y422-114 type blocking valve adopting level pressure one way valve to substitute dead plug.
3. Anti-theft casing blockage structure according to claim 2, is characterized in that: the relief tube also comprising the pressure release passage being connected to cover plate and the valve body for pressure release be fixed in relief tube.
4. Anti-theft casing blockage structure according to claim 1, be is characterized in that: sealed by ring gasket between described cover plate and casing flange, and cover plate bottom surface and the corresponding ring gasket of casing flange end face are equipped with annular groove; Cover plate and casing flange are connected and fixed by bolt and nut pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510749847.4A CN105350935B (en) | 2015-11-06 | 2015-11-06 | Anti-theft casing blockage structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510749847.4A CN105350935B (en) | 2015-11-06 | 2015-11-06 | Anti-theft casing blockage structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105350935A true CN105350935A (en) | 2016-02-24 |
| CN105350935B CN105350935B (en) | 2017-12-12 |
Family
ID=55326981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510749847.4A Active CN105350935B (en) | 2015-11-06 | 2015-11-06 | Anti-theft casing blockage structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105350935B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3897824A (en) * | 1974-09-05 | 1975-08-05 | Cameron Iron Works Inc | Blowout preventer testing apparatus |
| US4390063A (en) * | 1981-05-20 | 1983-06-28 | W-K-M Wellhead Systems, Inc. | Geothermal wellhead packing assembly |
| US4473230A (en) * | 1984-02-10 | 1984-09-25 | Gary Tool Company | Tension hanger embodying fire resistant sealing means |
| CN2055859U (en) * | 1989-03-23 | 1990-04-11 | 胜利油田采油工艺研究院 | High pressure self-seal well sealing device |
| CN2293641Y (en) * | 1997-04-18 | 1998-10-07 | 四川石油管理局川西南矿区 | Inner hole plug for maintaining wellhead device gate valve |
| CN2737934Y (en) * | 2004-10-12 | 2005-11-02 | 大庆油田有限责任公司 | Antitheft casing packing device |
| CN201635696U (en) * | 2010-04-29 | 2010-11-17 | 柳长江 | High-pressure sealing password theft-proof well-sealing lock |
-
2015
- 2015-11-06 CN CN201510749847.4A patent/CN105350935B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3897824A (en) * | 1974-09-05 | 1975-08-05 | Cameron Iron Works Inc | Blowout preventer testing apparatus |
| US4390063A (en) * | 1981-05-20 | 1983-06-28 | W-K-M Wellhead Systems, Inc. | Geothermal wellhead packing assembly |
| US4473230A (en) * | 1984-02-10 | 1984-09-25 | Gary Tool Company | Tension hanger embodying fire resistant sealing means |
| CN2055859U (en) * | 1989-03-23 | 1990-04-11 | 胜利油田采油工艺研究院 | High pressure self-seal well sealing device |
| CN2293641Y (en) * | 1997-04-18 | 1998-10-07 | 四川石油管理局川西南矿区 | Inner hole plug for maintaining wellhead device gate valve |
| CN2737934Y (en) * | 2004-10-12 | 2005-11-02 | 大庆油田有限责任公司 | Antitheft casing packing device |
| CN201635696U (en) * | 2010-04-29 | 2010-11-17 | 柳长江 | High-pressure sealing password theft-proof well-sealing lock |
Non-Patent Citations (3)
| Title |
|---|
| 朱进府等: "《高压油气井井口控制配套装置》", 《油气井测试》 * |
| 蔡藻等: ""Y422— 114型双向卡瓦封隔器的研制及应用"", <石油机械> * |
| 马立军等: "《多功能油田封井防盗井口的研制》", 《中国设备工程》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105350935B (en) | 2017-12-12 |
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