CN201218074Y - Sealing polished rod type shaft mouth sealing device for down-hole hydraulic self-sealing packing kit - Google Patents
Sealing polished rod type shaft mouth sealing device for down-hole hydraulic self-sealing packing kit Download PDFInfo
- Publication number
- CN201218074Y CN201218074Y CNU2008200904561U CN200820090456U CN201218074Y CN 201218074 Y CN201218074 Y CN 201218074Y CN U2008200904561 U CNU2008200904561 U CN U2008200904561U CN 200820090456 U CN200820090456 U CN 200820090456U CN 201218074 Y CN201218074 Y CN 201218074Y
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- CN
- China
- Prior art keywords
- sealing
- oil pipe
- packing box
- self
- polished rod
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- Expired - Fee Related
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Abstract
A sealing-polish-rod wellhead sealing device for an underground hydraulic self-sealing packing box mainly solves the wellhead sealing problem of an underground balancing long-stroke oil suckling machine. The sealing-polish-rod wellhead sealing device is characterized in that a small cross-joint (3) connected with the top of a big cross-joint (1) is internally provided with a minor-diameter oil pipe hanger (1) and a minor-diameter oil pipe (2) connected with the minor-diameter oil pipe hanger (1), the inner hole of the minor-diameter oil pipe (2) is provided with a ring-shaped pillar (11) with an axial ring-shaped groove arranged on, the bottom of the minor-diameter oil pipe (2) is connected with an oil pipe cap (9) with a fluid-in hole (10) and is provided with an axial ring-shaped groove, a hydraulic self-sealing packing box with a sealing ring (7) is arranged between the two axial ring-shaped grooves, the hydraulic self-sealing packing box (7) is internally provided with a polish rod (8), the upper end of the polish rod (8) is connected with a driving chain through a connector, and the lower end of the polish rod (8) is connected with a sucker rod string through a connector. The sealing ring on the self-sealing packing box clings to the polish rod under the internal pressure of the oil pipe, thus the purpose of sealing is achieved.
Description
Technical field
The utility model relates to well mouth sealing device in the oil recovery field, oil field, relates in particular to the self-styled packing box sealing of underground hydraulic pressure polished rod formula well mouth sealing device.
Background technology
At present the suspension point of conventional oil pumper is aboveground, and its well mouth sealing device realizes by well head packing box sealing polished rod, and the suspension point of underground balancing long stroke pumping unit is in the down-hole, and conventional well mouth sealing device just can not satisfy seal request.
The utility model content
In order to satisfy the requirement of underground balance long stroke oil pump well head sealing, the utility model provides the self-styled packing box sealing of a kind of underground hydraulic pressure polished rod formula well mouth sealing device.This device utilizes joint ring on the self-styled packing box of underground hydraulic pressure under the effect of oil pipe internal pressure, is close to polished rod, reaches sealing purpose.
The technical solution of the utility model is: the self-styled packing box sealing of underground hydraulic pressure polished rod formula well mouth sealing device, comprise tubing hanger and big latus rectum oil pipe in the big four, minor diameter tubing is installed in the little four-way that the top of big four connects to be hung and connected minor diameter tubing, the endoporus of minor diameter tubing has on circular column and its axial circular trough is arranged, on the oil pipe cap of the bottom connecting band inlet opening of minor diameter tubing and its axial circular trough is arranged, the hydraulic pressure self-sealing packing box that has joint ring is installed between two axial cannelures, the hydraulic pressure self-sealing packing box is built-in with polished rod, the polished rod upper end links to each other with chain drive-belt by connector, and the lower end links to each other with rod string by connector.
Described minor diameter tubing is hung and is connected with the minor diameter tubing taper pipe thread; Minor diameter tubing is connected with the oil pipe cap thread.
The beneficial effects of the utility model are: the self-styled packing box sealing of this underground hydraulic pressure polished rod formula well mouth sealing device is owing to adopted technique scheme, by tubing hanger and minor diameter tubing are installed in little four-way, the hydraulic pressure self-sealing packing box is installed in minor diameter tubing again, joint ring on the self-styled packing box is under the effect of oil pipe internal pressure, be close to polished rod, reach the purpose of down-hole sealing.
Description of drawings
Accompanying drawing 1 is the structural representation of the self-styled packing box sealing of underground hydraulic pressure polished rod formula well mouth sealing device
Accompanying drawing 2 is the partial enlarged drawing of the oil pipe cap shown in the accompanying drawing 1
The big latus rectum oil pipe of the little four-way 4-of the little four-way tubing hanger of 1-2-minor diameter tubing 3-tubing hanger 5-big four 6-7-hydraulic pressure self-sealing packing box 8-polished rod 9-oil pipe cap 10-inlet opening 11-circular column
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in drawings, on the tubing hanger 4 in the big four 5, big latus rectum oil pipe 6 is threaded; The top of big four 5 connects little four-way 3, minor diameter tubing is installed in the latus rectum on little four-way 3 hangs 1, hangs the 1 endosiphuncular tube minor diameter tubing 2 that has been threaded at minor diameter tubing, and the internal diameter of its minor diameter tubing 2 satisfies pumping of drive chain; On the circular column 11 of minor diameter tubing 2 endoporus, have axial circular trough, the bottom thread of minor diameter tubing 2 connects oil pipe cap 9, have inlet opening 10 and axial annular groove on the oil pipe cap 9, the hydraulic pressure self-sealing packing box 7 that endoporus has joint ring is installed between two axial circular troughs up and down, and hydraulic pressure self-sealing packing box 7 is built-in with polished rod 8; Polished rod 8 upper ends link to each other with chain drive-belt by connector, and the lower end links to each other with rod string by connector.During the oil pumping operation, by the inlet opening on the oil pipe cap 9 10, the liquid in the oil pipe enters in the cavity of packing box 7 and minor diameter tubing 2, and the joint ring on the self-styled packing box is close to polished rod under the effect of oil pipe internal pressure liquid, reaches the purpose of down-hole sealing polished rod.
Claims (3)
1, the self-styled packing box sealing of a kind of underground hydraulic pressure polished rod formula well mouth sealing device, comprise tubing hanger (4) and big latus rectum oil pipe (6) in the big four (5), it is characterized in that: minor diameter tubing is installed in the little four-way (3) that the top of big four (5) connects hangs (1) and connected minor diameter tubing (2), the endoporus of minor diameter tubing (2) has on circular column (11) and its axial circular trough is arranged, on the oil pipe cap (9) of the bottom connecting band inlet opening (10) of minor diameter tubing (2) and its axial circular trough is arranged, the hydraulic pressure self-sealing packing box (7) that has joint ring is installed between two axial cannelures, hydraulic pressure self-sealing packing box (7) is built-in with polished rod (8), polished rod (8) upper end links to each other with chain drive-belt by connector, and the lower end links to each other with rod string by connector.
2, the self-styled packing box sealing of underground hydraulic pressure according to claim 1 polished rod formula well mouth sealing device, it is characterized in that: minor diameter tubing is hung (1) and is connected with minor diameter tubing (2) taper pipe thread
3, the self-styled packing box sealing of underground hydraulic pressure according to claim 1 polished rod formula well mouth sealing device, it is characterized in that: minor diameter tubing (2) is threaded with oil pipe cap (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200904561U CN201218074Y (en) | 2008-07-18 | 2008-07-18 | Sealing polished rod type shaft mouth sealing device for down-hole hydraulic self-sealing packing kit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200904561U CN201218074Y (en) | 2008-07-18 | 2008-07-18 | Sealing polished rod type shaft mouth sealing device for down-hole hydraulic self-sealing packing kit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201218074Y true CN201218074Y (en) | 2009-04-08 |
Family
ID=40540910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200904561U Expired - Fee Related CN201218074Y (en) | 2008-07-18 | 2008-07-18 | Sealing polished rod type shaft mouth sealing device for down-hole hydraulic self-sealing packing kit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201218074Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483089A (en) * | 2021-07-30 | 2021-10-08 | 重庆长安汽车股份有限公司 | Lubricating oil channel structure of reverse gear bearing hole of gearbox |
-
2008
- 2008-07-18 CN CNU2008200904561U patent/CN201218074Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483089A (en) * | 2021-07-30 | 2021-10-08 | 重庆长安汽车股份有限公司 | Lubricating oil channel structure of reverse gear bearing hole of gearbox |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 Termination date: 20170718 |