CN104653140A - Wellhead anti-theft device - Google Patents
Wellhead anti-theft device Download PDFInfo
- Publication number
- CN104653140A CN104653140A CN201510104971.5A CN201510104971A CN104653140A CN 104653140 A CN104653140 A CN 104653140A CN 201510104971 A CN201510104971 A CN 201510104971A CN 104653140 A CN104653140 A CN 104653140A
- Authority
- CN
- China
- Prior art keywords
- theft
- bolt
- theft device
- well
- wellhead
- 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.)
- Pending
Links
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000003129 oil well Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/005—Measures against unauthorised operation of bolts, nuts or pins
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a wellhead anti-theft device, and belongs to an anti-theft device for closing a wellhead in the oil testing, well repairing and well completing processes. The wellhead anti-theft device adopts the technical scheme that the wellhead anti-theft device consists of an anti-theft wrench, an upper cover plate, a press plate, a protecting cover, a slotting bolt, an outer casing, a plug and an anti-theft bolt. The wellhead anti-theft device is characterized in that the anti-theft bolt is a particular bolt which is matched with the anti-theft wrench, an inner boss at the lower part of the protecting cover is positioned in an annular space which is formed by the outer casing and the press plate, the press plate and the outer casing are fixed by the slotting bolt, the protecting cover and the upper cover plate are of a rotary structure, the lower part of the outer casing is of a sealing structure, and the exterior of the outer casing is provided with 5 and 1/2 casing coupling threads. The wellhead anti-theft device has the beneficial effects that the stealing of an oil well is prevented, the repeated use is realized, the occident of well blowout is prevented, the resource and environment are protected, and the cost of well sealing is reduced.
Description
Technical field
The invention belongs to the anti-theft device of closing well head in the operation process such as formation testing, well workover, completion, a kind of Anti-theft device for wall head specifically.
Background technology
In existing well-filling techniques, employing be the shut-in well technique using wellhead cap and lower bridging plug.When adopting wellhead cap shut-in well, due to stop production long-time after, the pressure in well can rise, and causes well head to build the pressure, and wellhead cap can cannot be opened, if well sealer installs valve additional, then valve is easily stolen or drain the oil again, does not reach the object of shut-in well.When adopting lower bridging plug shut-in well, under enter, open bridging plug costly, and can not Reusability.
Summary of the invention
For above-mentioned produced problem, the invention provides a kind of Anti-theft device for wall head.
The present invention solves the technical scheme that its technical problem takes: a kind of Anti-theft device for wall head, by Anti-theft wrench, and upper cover plate, pressing plate, guard shield, slotting bolt, shell body, plug, anti-theft bolt is formed; It is characterized in that: anti-theft bolt be special with Anti-theft wrench with the use of bolt, the inner convex platform of guard shield bottom is positioned at the annulus that shell body and pressing plate are formed, pressing plate and shell body are fixed by slotting bolt, guard shield and upper cover plate are rotational structure, shell body bottom is enclosed construction, and outside is shaped with 5 1/2 casing coupling screw threads.
The good effect of employing technique scheme is: this Anti-theft device for wall head is all arranged in sleeve pipe, in solution capping operation, only have and utilize special Anti-theft wrench anti-theft device could be screwed in 5 1/2 casing couplings, well head, without any origin of force, must use supporting special unsealing tool and technical method can deblocking; Prevent oil well stolen, and can repeatedly use, prevent the generation of gas blowout accident, protect resources and environment, reduce the expense of shut-in well.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In Fig. 1,1-Anti-theft wrench; 2-upper cover plate; 3-pressing plate; 4-guard shield; 5-slotting bolt; 6-shell body; 7-plug; 8-anti-theft bolt.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated: as shown in Figure 1, shell body 6 bottom of the present invention is enclosed construction, outside is shaped with the casing threads matched with 5 1/2 casing couplings, casing threads has good sealing performance, special anti-theft bolt 8 is welded on the inside of shell body 6, and the upper end of shell body 6 is connected by slotting bolt 5 with pressing plate 3, and the center of pressing plate 3 is shaped with the hole that diameter is 30, the head of convenient and theftproof spanner 1 stretches into and coordinates with anti-theft bolt 8, realizes shut-in well and deblocking.The bottom inner convex platform of guard shield 4 is embedded in the cannelure that pressing plate 3 and shell body 6 upper end formed, and guard shield 4 can rotate freely, but can restrictive axial move.Because this instrument is all arranged in casing coupling, visible outside sleeve pipe only have the upper cover plate 2 be welding as one with guard shield 4, and so no matter apply what external force in outside, guard shield 4 only can rotate, anti-theft device entirety cannot be screwed out sleeve pipe, serve good anti-theft effect.In capping operation, special Anti-theft wrench 1 is utilized to screw in 5 1/2 casing couplings by anti-theft device; During deblocking, special Anti-theft wrench 1 also must be used to be screwed out by anti-theft device.
Claims (1)
1. an Anti-theft device for wall head, by Anti-theft wrench (1), upper cover plate (2), pressing plate (3), guard shield (4), slotting bolt (5), shell body (6), plug (7), anti-theft bolt (8) is formed; It is characterized in that: anti-theft bolt (8) for special with Anti-theft wrench (1) with the use of bolt, the inner convex platform of guard shield (4) bottom is positioned at the annulus that shell body (6) is formed with pressing plate (3), pressing plate (3) is fixed by slotting bolt (5) with shell body (6), guard shield (4) and upper cover plate (2) are rotational structure, shell body (6) bottom is enclosed construction, and outside is shaped with 5 1/2 casing coupling screw threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510104971.5A CN104653140A (en) | 2015-03-11 | 2015-03-11 | Wellhead anti-theft device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510104971.5A CN104653140A (en) | 2015-03-11 | 2015-03-11 | Wellhead anti-theft device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104653140A true CN104653140A (en) | 2015-05-27 |
Family
ID=53244714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510104971.5A Pending CN104653140A (en) | 2015-03-11 | 2015-03-11 | Wellhead anti-theft device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104653140A (en) |
Cited By (3)
| 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 |
| CN111255406A (en) * | 2020-03-16 | 2020-06-09 | 周家祥 | Dustproof and antitheft wellhead cap for oil field |
| CN111794714A (en) * | 2020-07-09 | 2020-10-20 | 三亚乾泰石油机械技术有限公司 | Lever anti-theft device is pressed to beam-pumping unit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3653671A (en) * | 1968-10-23 | 1972-04-04 | Fmc Corp | Self-energizing well packoff |
| US4291889A (en) * | 1980-08-18 | 1981-09-29 | Cactus Pipe & Supply Co., Inc. | Seal for wellheads |
| CN2545358Y (en) * | 2002-01-28 | 2003-04-16 | 刘龙江 | Pressure release type wellhead theftproofing device |
| CN2687314Y (en) * | 2003-11-21 | 2005-03-23 | 韩冬 | Dust-free anti-theft well head cap for oil field |
| CN2769502Y (en) * | 2004-12-26 | 2006-04-05 | 汤广德 | Oil field well head antitheft device |
| CN2849136Y (en) * | 2005-10-14 | 2006-12-20 | 大庆油田有限责任公司 | Antitheft well head cap capable of discharging oil gas and its special spanner |
| CN201155314Y (en) * | 2008-02-18 | 2008-11-26 | 杨宏伟 | Antitheft well head cap |
| CN201857921U (en) * | 2010-11-08 | 2011-06-08 | 大庆油田有限责任公司 | Dual-sliding-cover anti-theft wellhead cap of bailing well |
-
2015
- 2015-03-11 CN CN201510104971.5A patent/CN104653140A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3653671A (en) * | 1968-10-23 | 1972-04-04 | Fmc Corp | Self-energizing well packoff |
| US4291889A (en) * | 1980-08-18 | 1981-09-29 | Cactus Pipe & Supply Co., Inc. | Seal for wellheads |
| CN2545358Y (en) * | 2002-01-28 | 2003-04-16 | 刘龙江 | Pressure release type wellhead theftproofing device |
| CN2687314Y (en) * | 2003-11-21 | 2005-03-23 | 韩冬 | Dust-free anti-theft well head cap for oil field |
| CN2769502Y (en) * | 2004-12-26 | 2006-04-05 | 汤广德 | Oil field well head antitheft device |
| CN2849136Y (en) * | 2005-10-14 | 2006-12-20 | 大庆油田有限责任公司 | Antitheft well head cap capable of discharging oil gas and its special spanner |
| CN201155314Y (en) * | 2008-02-18 | 2008-11-26 | 杨宏伟 | Antitheft well head cap |
| CN201857921U (en) * | 2010-11-08 | 2011-06-08 | 大庆油田有限责任公司 | Dual-sliding-cover anti-theft wellhead cap of bailing well |
Cited By (3)
| 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 |
| CN111255406A (en) * | 2020-03-16 | 2020-06-09 | 周家祥 | Dustproof and antitheft wellhead cap for oil field |
| CN111794714A (en) * | 2020-07-09 | 2020-10-20 | 三亚乾泰石油机械技术有限公司 | Lever anti-theft device is pressed to beam-pumping unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |
|
| WD01 | Invention patent application deemed withdrawn after publication |