CN203022690U - Well mouth anti-theft valve for oil field wells - Google Patents
Well mouth anti-theft valve for oil field wells Download PDFInfo
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- CN203022690U CN203022690U CN 201320048828 CN201320048828U CN203022690U CN 203022690 U CN203022690 U CN 203022690U CN 201320048828 CN201320048828 CN 201320048828 CN 201320048828 U CN201320048828 U CN 201320048828U CN 203022690 U CN203022690 U CN 203022690U
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Abstract
The utility model relates to a well mouth anti-theft valve for oil field wells, mainly solving the problem in the prior art that after an oil nozzle sleeve on a Christmas tree is opened, the crude oil is discharged directly and easy to be stolen. The well mouth anti-theft valve is characterized in that the downward end of a three-way valve shaft is welded with a diameter-variable valve seat (2), the lower end of the large diameter of the diameter-variable valve seat is in threaded connection with a screwed plug (1), an annular step of the large diameter is welded with a ball hood (3) and an inner ball hood (11), the inner ball hood is arranged on the upper part of the ball hood; the bottom surfaces of the ball hood and the inner ball hood are provided with a plurality of conical holes, the upper end of the small diameter of the diameter-variable valve seat is in threaded connection with a spring hood, the periphery side of the spring hood is provided with a plurality of elliptical holes, the spring hood is internally provided with spiral springs, the lower ends of the spiral springs are provided with spring seats (7), an annular step of the small diameter of the diameter-variable valve seat is welded with valve ball sealing seats (9), and a valve ball is arranged between the valve ball sealing seats and the spring seats. The well mouth anti-theft valve for oil field wells disclosed by the utility model can prevent the crude oil from being stolen, without influencing normal operations of well washing or well killing.
Description
Technical field
The utility model relates to a kind of oil well head anti-theft instrument, particularly a kind of oilfield well antitheft valve in the oil extraction in oil field field.
Background technology
At present, resistance oil nozzle sleeve on production tree, a kind of simple valve, switch is easy, crude oil can be sent once just turning on, created to the oil stealer and stolen easily the oil machine meeting, as long as lay down the plug on resistance oil nozzle sleeve, just can be easily install to crude oil on car or put into polybag and transport to the crude oil place that disposes of stolen goods, so causing every year substantial oil to waste, cause great economic loss to country, affect simultaneously normal well-flushing or kill-job.
Summary of the invention
Technical problem to be solved in the utility model is to overcome resistance oil nozzle sleeve on the production tree that exists in background technology to open rear crude oil and directly emit easily stolen problem, and provide a kind of oilfield well antitheft valve, this oilfield well antitheft valve, protect, prevent that the crude oil loss is stolen, do not affect normal well-flushing or kill job.
The invention for solving the technical problem can reach by following technical solution: this oilfield well antitheft valve comprises three way cock, described three way cock lower axial end is welded with the reducing valve seat, stifled at reducing valve seat large diameter lower end screw thread connecting filament, be welded with ball cover and interior ball cover on large diameter ring-shaped step, interior ball cover is placed in ball cover top, and the ball cover bottom surface is the ball section type; Have some bellmouths on described ball cover and interior ball cover bottom surface; The spring shield that is threaded in the upper end of reducing valve seat minor diameter, the all sides of spring shield have several slotted eyes, helical spring is housed in spring shield, helical spring lower end is provided with spring base, be inlaid with the valve ball seal receptacle on the ring-shaped step of reducing valve seat minor diameter, be provided with valve ball between valve ball seal receptacle and spring base.
The utility model is compared with the above-mentioned background technology can have following beneficial effect: this oilfield well antitheft valve is owing to adopting said structure, crude oil enters gathering line, when dismantling plug, crude oil is being kept off by valve ball can not to be put out, if when backing down valve ball, ball cover and interior ball cover are keeping off and pushing up not open, and the oil stealer can't steal oil.Reduce the stolen economic loss that causes of crude oil.Do not affect simultaneously normal well-flushing or kill job, guarantee normally to produce.
Description of drawings:
Accompanying drawing 1 is structural representation of the present utility model.
In figure: 1-plug, 2-valve seat, 3-ball cover, 4-valve ball, 5-three way cock, 6-helical spring, 7-spring base, 8-spring shield, 9-valve ball seal receptacle, ball cover in 10-bellmouth, 11-.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, this oilfield well antitheft valve comprises three way cock 5, described three way cock 5 lower axial end are welded with reducing valve seat 2, at reducing valve seat 2 large diameter lower end screw thread connecting filament stifled 1, be welded with ball cover 3 and interior ball cover 11 on large diameter ring-shaped step, interior ball cover 11 is placed in ball cover 3 tops, and ball cover 3 bottom surfaces are the ball section type; Have some bellmouths 10 on described ball cover 3 and interior ball cover 11 bottom surfaces; The spring shield 8 that is threaded in the upper end of reducing valve seat 2 minor diameters, the all sides of spring shield 8 have several slotted eyes, helical spring 6 is housed in spring shield 8, the lower end of helical spring 6 is provided with spring base 7, be inlaid with valve ball seal receptacle 9 on the ring-shaped step of reducing valve seat 2 minor diameters, be provided with valve ball 4 between valve ball seal receptacle 9 and spring base 7.
when this oilfield well antitheft valve is used, three way cock is connected with gathering line, opening oil pumper normally pumps, oil enters gathering line, when dismantling plug, oil is being kept off by valve ball can not to be put out, if when backing down valve ball, ball cover and interior ball cover are keeping off and pushing up not open, the oil stealer can't steal oil, when the oil well well workover, well-flushing, kill-job or when taking other to increase oily measure, can unload plug and connect upper construction pipeline, can buy flushing fluid or well killing fluid in oil pipe with cementing truck, liquid backs down valve ball, enter threeway by all side slotted eyes of spring shield and enter again oil pipe, as well-flushing, flushing fluid returns to ground from sleeve pipe and sleeve gate, if kill-job, having bought well killing fluid gets final product, in work progress, the back-pressure gate of oil pipeline is closing, strata pressure is high the spray phenomenon can not occur returning more yet, because there being valve ball keeping off, can not reflux.Guarantee normal production, reduce the stolen economic loss that causes of crude oil.
Claims (1)
1. oilfield well antitheft valve, comprise three way cock (5), it is characterized in that: described three way cock (5) lower axial end is welded with reducing valve seat (2), at reducing valve seat (2) large diameter lower end screw thread connecting filament stifled (1), be welded with ball cover (3) and interior ball cover (11) on large diameter ring-shaped step, interior ball cover (11) is placed in ball cover (3) top, and ball cover (3) bottom surface is the ball section type; Have some bellmouths (10) on described ball cover (3) and interior ball cover (11) bottom surface; The spring shield (8) that is threaded in the upper end of reducing valve seat (2) minor diameter, the all sides of spring shield (8) have several slotted eyes, helical spring (6) is housed in spring shield (8), the lower end of helical spring (6) is provided with spring base (7), be inlaid with valve ball seal receptacle (9) on the ring-shaped step of reducing valve seat (2) minor diameter, be provided with valve ball (4) between valve ball seal receptacle (9) and spring base (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320048828 CN203022690U (en) | 2013-01-29 | 2013-01-29 | Well mouth anti-theft valve for oil field wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320048828 CN203022690U (en) | 2013-01-29 | 2013-01-29 | Well mouth anti-theft valve for oil field wells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203022690U true CN203022690U (en) | 2013-06-26 |
Family
ID=48646681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320048828 Expired - Fee Related CN203022690U (en) | 2013-01-29 | 2013-01-29 | Well mouth anti-theft valve for oil field wells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203022690U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285558A (en) * | 2016-11-01 | 2017-01-04 | 李喜庆 | Production wellhead guard against theft oil stop valve |
-
2013
- 2013-01-29 CN CN 201320048828 patent/CN203022690U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285558A (en) * | 2016-11-01 | 2017-01-04 | 李喜庆 | Production wellhead guard against theft oil stop valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20160129 |
|
| EXPY | Termination of patent right or utility model |