CN2136326Y - Polish rod sealing device - Google Patents
Polish rod sealing device Download PDFInfo
- Publication number
- CN2136326Y CN2136326Y CN 92236278 CN92236278U CN2136326Y CN 2136326 Y CN2136326 Y CN 2136326Y CN 92236278 CN92236278 CN 92236278 CN 92236278 U CN92236278 U CN 92236278U CN 2136326 Y CN2136326 Y CN 2136326Y
- Authority
- CN
- China
- Prior art keywords
- polish rod
- oil
- packing
- sealing device
- seal 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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- Sealing Devices (AREA)
Abstract
The utility model relates to a polish rod sealing device used for mechanical producing wells in oil fields, which is formed by the application of the hydraulic principle and the combination of production practice. An annular space is formed between a cylindrical packing and a casing, a dedicated press oil gun is used for injecting pressure liquid to the annular space to make the space always keep certain pressure, and the cylindrical packing, under the function of pressure, takes a sealing effect on the polish rod. The sealing device of the existing polish rod adopts that compacting packing reaches the sealing purpose through radial elastic deformation, but the elastic deformation is limited so that the service life of the packing is short on site application, the oil ooze of a well mouth is easy to cause to affect the output of raw oil, and the effect on an oil well with an eccentric polish rod is worse. The utility model can solve the existing problems.
Description
The utility model relates to a kind of oil field machine-pumped oil well polish rod seal device.
Existing polish rod seal device be the compacting packing, by its radially modification seal polished rod, the radially modification limited owing to packing will soon disappear, cause polished rod seal malfunctioning under the effect of friction, cause well head thorn oil, influence crude oil production, frequent replacing packing brings inconvenience for oil recovery workman and production management.
The utility model provides a kind of polish rod seal device, and it is not only applicable to the open well mouth, and the eccentric well of polished rod is had certain effect, and the life-span long, use simple, reliable.
The purpose of this utility model is achieved in that its uses hydraulic principle, has formed annular space between cartridge type packing and housing, and between upper press cover and joint with 6 screw in compression tubular packings, annular space is not tightly leaked.Press oil gun injection pressure liquid in annular space with special use, make it to remain certain pressure, the tubular packing compresses polished rod and plays sealing function under the effect of pressure.Because the tubular packing makes arc chord angle up and down, no matter polished rod is partial to that direction in one scope, the annular space internal volume is constant, and its pressure still remains unchanged, and can play the effect of sealing polished rod equally.
Below in conjunction with drawings and Examples the utility model is further specified.
Accompanying drawing is the constructional drawing of polish rod seal device.Among the figure 1, attachment screw; 2, gland; 3, tubular packing; 4, housing; 5, pump nozzle; 6, well head connecting filament discount.
In the accompanying drawing illustrated embodiment, gland (2) all has 6 pairs of corresponding, uniform screw holes with housing (4), well head connecting filament discount (6) and housing (4), screw thread is on housing (4), by 12 screws tubular packing (3) is fastened on gland (2), well head connecting screw (6) and the housing (4), the internal diameter of tubular packing (3) just in time equals the polished rod external diameter, the internal diameter of the internal diameter of gland (2) and well head connecting filament discount (6) is slightly larger than the internal diameter of tubular packing (3), to satisfy the needs of polished rod off-centre.Tubular packing (3) is upper and lower makes circular arc chamfering, be beneficial to elastic deformation, pump nozzle (5) be welded on housing (4) go up so that use at any time grease gun to annular space injection pressure liquid with supplementary pressure.
Claims (4)
1, a kind of oil field machine-pumped oil well polish rod seal device is characterized in that between housing and gland, housing and the well head screw thread head connecting with screw and compressing the tubular packing.
2,, it is characterized in that tubular packing upper/lower terminal is a circular arc chamfering according to claim 1 described polish rod seal device.
3,, it is characterized in that gland internal diameter and the oral internal diameter of well head connecting filament are equal and be slightly larger than tubular packing internal diameter according to claim 1 described polish rod seal device.
4, according to claim 1 described polish rod seal device, it is characterized in that having on the housing pump nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92236278 CN2136326Y (en) | 1992-09-27 | 1992-09-27 | Polish rod sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92236278 CN2136326Y (en) | 1992-09-27 | 1992-09-27 | Polish rod sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2136326Y true CN2136326Y (en) | 1993-06-16 |
Family
ID=33777863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92236278 Expired - Fee Related CN2136326Y (en) | 1992-09-27 | 1992-09-27 | Polish rod sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2136326Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675359A (en) * | 2015-01-21 | 2015-06-03 | 铜仁中能天然气有限公司 | Safe shale gas well plugging device |
| CN107355191A (en) * | 2017-08-03 | 2017-11-17 | 中国石油天然气股份有限公司 | Well mouth sealing device |
-
1992
- 1992-09-27 CN CN 92236278 patent/CN2136326Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675359A (en) * | 2015-01-21 | 2015-06-03 | 铜仁中能天然气有限公司 | Safe shale gas well plugging device |
| CN107355191A (en) * | 2017-08-03 | 2017-11-17 | 中国石油天然气股份有限公司 | Well mouth sealing device |
| CN107355191B (en) * | 2017-08-03 | 2019-05-07 | 中国石油天然气股份有限公司 | Well mouth sealing device |
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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 |