CN2906040Y - Anti-theft wellhead cap - Google Patents
Anti-theft wellhead cap Download PDFInfo
- Publication number
- CN2906040Y CN2906040Y CN 200620012152 CN200620012152U CN2906040Y CN 2906040 Y CN2906040 Y CN 2906040Y CN 200620012152 CN200620012152 CN 200620012152 CN 200620012152 U CN200620012152 U CN 200620012152U CN 2906040 Y CN2906040 Y CN 2906040Y
- Authority
- CN
- China
- Prior art keywords
- counterbore
- main body
- bullet
- plug
- drive link
- 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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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Disclosed is a theftproof wellhead cap which avoids the disadvantages of poor theftproof effect and natural gas and crude oil leakages upon the opening of the wellhead cap. It is characterized in that the body (1) with a counterbore (2) at the center is connected to a casing joint through a male thread; a drive rod (3) is fixed on the counterbore through a screw hole; a cone conductor (4) is fixed on the lower part of the drive rod which has a the irregular upper end; at least two locking blocks(5) are hinged to the lower surface of the body; the internal lower parts of the locking blocks contact with cone surface; a pressure release vent(6) is axially arranged on the body; a upper screwed plug and a lower screwed plug are provided inside the pressure release vent and the upper end of the lower screwed plug is equipped with a oil discharge pipe joint. The theftproof wellhead cap has the advantages of good effect in guarding against theft and antipollution.
Description
Technical field:
The utility model relates to used wellhead cap in the oil recovery field, oil field, especially Pithead preventing thieves cap.
Background technology:
Along with Oilfield developing, often longer again at interval at the real production time of drilling well and oil well to adapt to the needs of different productive lives, in order to prevent stolen or foreign material fall into well, the well head after needing finish drilling well must carry out well head at once and seal.At present, generally all use simple wellhead cap sealing well head.Existing wellhead cap is owing to only adopt the mode that is threaded, under unattended situation, there are stolen, artificial destruction and well head blocking problem, do not possess anti-theft feature, cause oil-water well to need overhaul to handle when serious, cause the difficulty of going into operation, and increased disposal cost.Simultaneously wellhead cap poorly sealed or open the wellhead cap natural gas when dragging for oil, oil leaks, contaminated environment is unfavorable for applying.
The utility model content:
The problem that natural gas, crude oil leak when having wellhead cap anti-theft effect difference and unlatching now in order to solve, the utility model provides a kind of Pithead preventing thieves cap, and this Pithead preventing thieves cap is good anti-theft effect not only, but also has antipollution characteristics.
The technical solution of the utility model is: this Pithead preventing thieves cap comprises main body, the main body of band counterbore placed in the middle links to each other with casing joint by external screw thread, be connected with drive link by screwed hole down in the counterbore, the drive link bottom of irregular upper end is fixed with bullet, there are 2 latch segments main body lower surface hinge at least, touches mutually with the conical surface of bullet down in the latch segment, and body shaft is to having relief hole, plug is up and down arranged in the relief hole, and there is oil discharge pipe's connector following plug upper end.
Bullet in the such scheme is fixed by nut and stay; The drive link upper end is oval; Be cast with plumbous liquid in the counterbore.
The utlity model has following beneficial effect: this Pithead preventing thieves cap is owing to take such scheme, with special tool when turning drive link, because of driving bullet, drive link moves up and down, bullet is opened or shrink, bullet closely is fixed on the sleeve pipe when opening, and breaks away from sleeve pipe during contraction, thereby whether the control well cap moves relative to sleeve pipe, because of the drive link upper end is to be cast with plumbous liquid in oval and the counterbore, increases the pilferage personnel and steal difficulty, thereby reach antitheft purpose simultaneously.And because plug is up and down arranged in relief hole; there is oil discharge pipe's connector following plug upper end; when opening; spin off plug earlier; the offloading joint that is connected to oil discharge pipe with the back has oil discharge pipe's connector to be connected with following plug upper end again; and plug under screwing down; after outwarding winding; following plug is fallen in the pit shaft; natural gas and crude oil reach the environmental protection purpose in oil discharge pipe enters oil tank, this Pithead preventing thieves cap can effectively prevent the pilferage behavior of oil molecule steathily thus; the economic interests in protection oil field are not encroached on; protect reservoir pressure and oil reservoir can not polluted simultaneously, be scientific management; develop oil fields and lay a solid foundation, protected surrounding environment not contaminated simultaneously; economic benefit of enterprises and social benefit are played positive role, help applying.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model.
1-main body among the figure, 2-counterbore, 3-drive link, 4-bullet, 5-latch segment, 6-relief hole, the last plug of 7-, plug under the 8-, 9-oil discharge pipe connector.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
Embodiment 1:
By shown in Figure 1, this Pithead preventing thieves cap comprises main body 1, the main body 1 of band counterbore 2 placed in the middle links to each other with casing joint by external screw thread, is connected with drive link 3 by screwed hole down in the counterbore 2, and drive link 3 bottoms of irregular upper end are fixed with bullet 4, there are 2 latch segments 5 main body 1 lower surface hinge at least, touch mutually with the conical surface of bullet 4 down in the latch segment 5, main body 1 axially has relief hole 6, and plug (7 is up and down arranged in the relief hole 6,8), there is oil discharge pipe's connector 9 following plug 8 upper ends.
Embodiment 2:
By shown in Figure 1, this Pithead preventing thieves cap comprises main body 1, the main body 1 of band counterbore 2 placed in the middle links to each other with casing joint by external screw thread, be connected with drive link 3 by screwed hole down in the counterbore 2, drive link 3 bottoms of irregular upper end are fixed with bullet 4 by nut and stay, there are 2 latch segments 5 main body 1 lower surface hinge at least, touch mutually with the conical surface of bullet 4 down in the latch segment 5, main body 1 axially has relief hole 6, plug (7 is up and down arranged in the relief hole 6,8), there is oil discharge pipe's connector 9 following plug 8 upper ends.
Embodiment 3:
By shown in Figure 1, this Pithead preventing thieves cap comprises main body 1, the main body 1 of band counterbore 2 placed in the middle links to each other with casing joint by external screw thread, be connected with drive link 3 by screwed hole down in the counterbore 2, upper end is that oval-shaped drive link 3 bottoms are fixed with bullet 4 by nut and stay, there are 2 latch segments 5 main body 1 lower surface hinge at least, touch mutually with the conical surface of bullet 4 down in the latch segment 5, main body 1 axially has relief hole 6, plug (7 is up and down arranged in the relief hole 6,8), there is oil discharge pipe's connector 9 following plug 8 upper ends.
Embodiment 4:
By shown in Figure 1, this Pithead preventing thieves cap comprises main body 1, the main body 1 of band counterbore 2 placed in the middle links to each other with casing joint by external screw thread, be connected with drive link 3 by screwed hole down in the counterbore 2, be cast with plumbous liquid in the counterbore 2, upper end is that oval-shaped drive link 3 bottoms are fixed with bullet 4 by nut and stay, there are 2 latch segments 5 main body 1 lower surface hinge at least, touch mutually with the conical surface of bullet 4 down in the latch segment 5, main body 1 axially has relief hole 6, plug (7,8) is up and down arranged in the relief hole 6, and there is oil discharge pipe's connector 9 following plug 8 upper ends.With special tool when turning drive link 3, because of driving bullet 4, drive link 3 moves up and down, make bullet 4 open or shrink, bullet 4 closely is fixed on the sleeve pipe when opening, break away from sleeve pipe during contraction, thereby whether the control well cap moving relative to sleeve pipe, is to be cast with plumbous liquid in oval and the counterbore 2 because of drive link 3 upper ends simultaneously, increase the pilferage personnel and steal difficulty, thereby reach antitheft purpose.And because plug (7,8) is up and down arranged in relief hole, there is oil discharge pipe's connector 9 following plug 8 upper ends, when opening, spin off plug 7 earlier, the offloading joint that is connected to oil discharge pipe with the back has oil discharge pipe's connector 9 to be connected with following plug 8 upper ends again, and screws down plug 8 down, after outwarding winding, following plug 8 is fallen in the pit shaft, and natural gas and crude oil reach the environmental protection purpose in oil discharge pipe enters oil tank, this Pithead preventing thieves cap good anti-theft effect not only thus, but also have antipollution characteristics.
Claims (4)
1, a kind of Pithead preventing thieves cap, comprise main body (1), it is characterized in that: the main body (1) with counterbore (2) links to each other with casing joint by external screw thread between two parties, be connected with drive link (3) by screwed hole down in the counterbore (2), the drive link of irregular upper end (3) bottom is fixed with bullet (4), there are 2 latch segments (5) main body (1) lower surface hinge at least, touch mutually with the conical surface of bullet (4) down in the latch segment (5), main body (1) axially has relief hole (6), plug (7 is up and down arranged in the relief hole (6), 8), there is oil discharge pipe's connector (9) following plug (8) upper end.
2, Pithead preventing thieves cap according to claim 1 is characterized in that: bullet (4) is fixed by nut and stay.
3, Pithead preventing thieves cap according to claim 2 is characterized in that: drive link (3) upper end is for oval.
4, Pithead preventing thieves cap according to claim 3 is characterized in that: counterbore is cast with plumbous liquid in (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620012152 CN2906040Y (en) | 2006-04-20 | 2006-04-20 | Anti-theft wellhead cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620012152 CN2906040Y (en) | 2006-04-20 | 2006-04-20 | Anti-theft wellhead cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2906040Y true CN2906040Y (en) | 2007-05-30 |
Family
ID=38114674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620012152 Expired - Fee Related CN2906040Y (en) | 2006-04-20 | 2006-04-20 | Anti-theft wellhead cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2906040Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996099A (en) * | 2012-12-08 | 2013-03-27 | 王俊德 | Environmental friendliness and energy conversation type tubing string drainage device of well mouth for work-over treatment |
-
2006
- 2006-04-20 CN CN 200620012152 patent/CN2906040Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996099A (en) * | 2012-12-08 | 2013-03-27 | 王俊德 | Environmental friendliness and energy conversation type tubing string drainage device of well mouth for work-over treatment |
| CN102996099B (en) * | 2012-12-08 | 2015-11-25 | 王俊德 | Workover treatment well head environmental protection and energy saving tubing string liquid drainage device |
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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: 20070530 Termination date: 20110420 |