CN2789408Y - Automatic decompression type valve swab - Google Patents
Automatic decompression type valve swab Download PDFInfo
- Publication number
- CN2789408Y CN2789408Y CN 200520080596 CN200520080596U CN2789408Y CN 2789408 Y CN2789408 Y CN 2789408Y CN 200520080596 CN200520080596 CN 200520080596 CN 200520080596 U CN200520080596 U CN 200520080596U CN 2789408 Y CN2789408 Y CN 2789408Y
- Authority
- CN
- China
- Prior art keywords
- oil
- steel cylinder
- valve assembly
- load
- pumping device
- 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 an underground oil pumping tool used in later oil extracting processes in oil fields, particularly a pumping device for oil extraction. The utility model comprises an upper contact 1, a steel cylinder 3, a sealed rubber cylinder 4 and a lower contact 9 and has The technical scheme that the upper contact 1 and the lower contact 9 are respectively provided with an oil outlet 2 and an oil inlet 8 which are communicated with the steel cylinder 3, and the inner part of the steel cylinder 3 is provided with a valve assembly 6 composed of a valve ball and a valve ball seat. The utility model has the technological improvement that the lower part of the pump valve assembly 6 is provided with a spring 7, the valve assembly 6 forms a sliding fit with the inner wall of the steel cylinder 3, and a plurality of oil draining holes are distributed on the sliding friction face of the steel cylinder 3 and the valve assembly 6 in the radial direction. Through the improvement, when the pumping device deeply submerged into the underground liquid level and the lifting load is too large, the closed oil draining holes closed by the valve assembly are opened to ensure that the height of a liquid column at the upper part of the pumping device is lowered, and the load is reduced. When the lifting load is reduced to a given load, the oil draining holes are closed, and the pumping device normally pumps oil, so that the accident that the load of the pumping device is too large to lift to be clamped under wells or a lifting rope is broken can be prevented from happening.
Description
One, technical field:
The utility model relates to the down-hole pumping tool that uses in a kind of oil field later stage oil recovery process, is a kind of swab of down-hole oil production specifically.
Two, background technology:
The later stage is recovered the oil because oil recovery amount is low in the oil field, in order to save cost, adopts the bailing method to recover the oil (also claiming oil recovery technique four times) usually.The main oil tool that this method is used be exactly the down-hole swab with ground up and down reciprocatingly jacking equipment cooperate.The structure of this class swab is to comprise top connection 1, steel cylinder 3, cartridge 4, lower contact 9 compositions, be respectively equipped with oil outlet 2 and the fuel feed hole 8 that is communicated with steel cylinder 3 in top connection 1 and lower contact 9, be provided with the valve assembly 6 that valve ball and valve ball seat are formed in steel cylinder 3 inside.In actual use because the downhole oil layer depth is difficult to grasp, when swab be lowered to liquid level cross dark after, fluid column weight and frictional force increase in the sleeve pipe, when carrying load on the swab above 60KN, it is motionless and stuck in the down-hole to cause swab to carry, if during this moment strong lifting, certainly will cause rope to pull off, swab is fallen in the well, cause heavy losses.
Three, summary of the invention:
The purpose of this utility model is exactly the defective that exists at prior art, and a kind of releasing pressure automatically formula valve swab is provided.
Its technical scheme is: comprise top connection 1, steel cylinder 3, cartridge 4, lower contact 9 compositions, be respectively equipped with oil outlet 2 and the fuel feed hole 8 that is communicated with steel cylinder 3 in top connection 1 and lower contact 9, be provided with the valve assembly 6 that valve ball and valve ball seat are formed in steel cylinder 3 inside.Its technological improvement part is: be provided with spring 7 in the bottom of valve assembly 6, valve assembly 6 is slidingly matched with steel cylinder 3 inwalls, several draining holes of radial distribution person on the sliding friction surface of steel cylinder 3 and valve assembly 6.
Darker by above-mentioned improved swab when being lowered to the down-hole liquid level, on carry load when excessive, the valve assembly that is slidingly matched under the fluid pressure effect to lower slider, open in the draining hole that former cause valve assembly is closed, the liquid on swab top leaks into the down-hole by the draining hole, the liquid-column height on swab top is reduced, load and reduce.When on carry load when reducing to given load, the support spring of valve assembly bottom moves up the valve assembly, the draining hole is closed, swab enters normal oil pumping operation.Thereby the accident of having avoided the swab overload to promote motionless and stuck down-hole or having pulled off rope takes place.
Four, description of drawings:
Accompanying drawing is the structural representation of a kind of embodiment of the present utility model.
Five, specific embodiment:
With reference to accompanying drawing, releasing pressure automatically formula valve swab comprises top connection 1, steel cylinder 3, cartridge 4, lower contact 9 compositions.Be respectively equipped with oil outlet 2 and the fuel feed hole 8 that is communicated with steel cylinder 3 in top connection 1 and lower contact 9.Be provided with the valve assembly 6 that valve ball and valve ball seat are formed in steel cylinder 3 inside.Be provided with spring 7 in the bottom of valve assembly 6.Valve assembly 6 is slidingly matched with steel cylinder 3 inwalls, radial distribution person 2-3 draining hole on the sliding friction surface of steel cylinder 3 and valve assembly 6.
Its operating principle is: top connection connects rope (wire rope) and is connected with the lifting lifting means on ground, drives swab and moves up and down in well.In descending process behind the liquid level under the swab lower going-into-well, valve ball is opened, and down-hole crude oil enters in the sleeve pipe on cartridge top by fuel feed hole, valve ball seat, steel cylinder, oil outlet.On carry in the swab process, valve ball and valve ball seat are closed, the crude oil on swab top is up together in company with swab, crude oil is thus lifted to ground.Behind liquid level under the swab lower going-into-well dark excessively (as 600 meters), on carried when loading greater than 60KN, the valve assembly that is slidingly matched under the fluid pressure effect to lower slider, open in the draining hole that former cause valve assembly is closed, the liquid on swab top leaks into the down-hole by the draining hole, the liquid-column height on swab top is reduced, load and reduce.When on carry load when reducing to 50KN, the draining hole is closed, swab enters normal oil pumping operation.
Claims (1)
1, a kind of releasing pressure automatically formula valve swab, comprise top connection (1), steel cylinder (3), cartridge (4), lower contact (9) composition, be respectively equipped with oil outlet (2) and the fuel feed hole (8) that is communicated with steel cylinder (3) in top connection (1) and lower contact (9), be provided with the valve assembly (6) that valve ball and valve ball seat are formed in steel cylinder (3) inside, it is characterized in that: be provided with spring (7) in the bottom of valve assembly (6), valve assembly (6) is slidingly matched with steel cylinder (3) inwall, several draining holes of radial distribution person on the sliding friction surface of steel cylinder (3) and valve assembly (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520080596 CN2789408Y (en) | 2005-03-02 | 2005-03-02 | Automatic decompression type valve swab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520080596 CN2789408Y (en) | 2005-03-02 | 2005-03-02 | Automatic decompression type valve swab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2789408Y true CN2789408Y (en) | 2006-06-21 |
Family
ID=36789739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520080596 Expired - Fee Related CN2789408Y (en) | 2005-03-02 | 2005-03-02 | Automatic decompression type valve swab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2789408Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769140A (en) * | 2010-01-07 | 2010-07-07 | 曲占庆 | Device for displacing oil underground, preventing reflow and automatically relieving pressure |
-
2005
- 2005-03-02 CN CN 200520080596 patent/CN2789408Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769140A (en) * | 2010-01-07 | 2010-07-07 | 曲占庆 | Device for displacing oil underground, preventing reflow and automatically relieving pressure |
| CN101769140B (en) * | 2010-01-07 | 2013-06-05 | 西安石油大学 | Device for displacing oil underground, preventing reflow and automatically relieving pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |