CN204457561U - A kind of anti-leak well mouth sealing device - Google Patents
A kind of anti-leak well mouth sealing device Download PDFInfo
- Publication number
- CN204457561U CN204457561U CN201420843245.6U CN201420843245U CN204457561U CN 204457561 U CN204457561 U CN 204457561U CN 201420843245 U CN201420843245 U CN 201420843245U CN 204457561 U CN204457561 U CN 204457561U
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- CN
- China
- Prior art keywords
- hole
- envelope
- box body
- big envelope
- block
- 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 discloses a kind of anti-leak well mouth sealing device, comprise box body, polished rod, spring and interior is provided with in hole in the middle part of box body, outside envelope, the bottom of the outer peripheral face of described interior big envelope is the conical surface that upper end diameter is large and lower end diameter is little, top is step cylinder, it is annular groove face between the conical surface and step cylinder, the upper surface of step cylinder on described top contacts with the lower surface of capping, the cone of described interior big envelope bottom is the block composition be uniformly distributed along the circumference, each block is the block with axial oblique, the upper end of each block is connected with annular trough body, the endoporus of outside envelope is the taper hole matched with the male cone (strobilus masculinus) of described interior big envelope, the outer cylinder of this outside envelope and its outer big envelope bore match, the sliding sealing annular distance fitted in box body of polished rod, in interior big envelope hole and capping hole.The utility model has the remarkable advantage of good sealing effect, long service life.
Description
Technical field:
The utility model relates to a kind of Sealing Technology, particularly a kind of anti-leak well mouth sealing device.
Background technology:
Well top sealer of oil sucker has various structures, but all adopts packing seal to be main, and packing wearing and tearing quickly, the life-span is short, need often change, and impact is produced; After wearing and tearing cause leakage of oil, well head pressure declines, and pumping efficiency is declined.Above-mentioned defect does not all obtain comparatively ideal solution.
Summary of the invention:
The utility model object is to provide a kind of good sealing effect and a kind of anti-leak well mouth sealing device of life-span length.
The technical scheme realizing the utility model object is a kind of anti-leak well mouth sealing device, comprise box body, polished rod, it is characterized in that: the stepped hole of box body lower end is that the threaded cylindrical of screwed hole and the little four-way of well head matches, joint ring is provided with in hole in the middle part of box body, the outer peripheral face of capping is provided with the screw thread with the corresponding threaded holes of cassette upper end, spring and interior is provided with in hole in the middle part of box body, outside envelope, the bottom of the outer peripheral face of described interior big envelope is the conical surface that upper end diameter is large and lower end diameter is little, top is step cylinder, it is annular groove face between the conical surface and step cylinder, the upper surface of step cylinder on described top contacts with the lower surface of capping, the cone of described interior big envelope bottom is the block composition be uniformly distributed along the circumference, each block is the block with axial oblique, the upper end of each block is connected with annular trough body, the endoporus of outside envelope is the taper hole matched with the male cone (strobilus masculinus) of described interior big envelope, the outer cylinder of this outside envelope and its outer big envelope bore match, described spring is placed between described joint ring and outside envelope, the sliding sealing annular distance fitted in box body of polished rod, in interior big envelope hole and capping hole.
The utility model has the remarkable advantage of good sealing effect, long service life compared with the prior art.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model, and Fig. 2 is the front view of interior big envelope, and Fig. 3 is the A-A cut-away view of Fig. 2.
Detailed description of the invention:
In conjunction with following embodiment, the utility model is elaborated, the stepped hole of box body 2 lower end is that the threaded cylindrical of screwed hole and the little four-way of well head matches, joint ring 3 is provided with in hole in the middle part of box body, spring 4 and interior is provided with in the hole on box body top, outside envelope 5, 6, the bottom of the outer peripheral face of described interior big envelope is the conical surface that upper end diameter is large and lower end diameter is little, top is step cylinder, it is annular groove face between the conical surface and step cylinder, the upper surface of step cylinder on described top contacts with the lower surface of capping, the cone of described interior big envelope bottom is the block composition be uniformly distributed along the circumference, each block is the block with axial oblique, the upper end of each block is connected with annular trough body, the endoporus of outside envelope is the taper hole matched with the male cone (strobilus masculinus) of described interior big envelope, outer cylinder and big envelope cylinder 7 hole of this outside envelope match, the upper surface of this outside envelope is relative with the cannelure of interior big envelope, described spring is placed between described joint ring and outside envelope, the sliding sealing annular distance fitted in box body of polished rod 1, in interior big envelope hole and capping 8 hole, the outer peripheral face of described capping is the corresponding threaded holes of screw thread and shell upper end.Utility model works principle: when polished rod is up, the pressure of up fluid makes overcoat up, and the block of interior big envelope cone reduces to be held tightly polished rod, not only keeps one's end up but also oil-proof; When polished rod is descending, atmospheric pressure makes outside envelope descending, and by compression, in the raw, polished rod is descending smoothly for interior big envelope and polished rod for spring.
Claims (1)
1. an anti-leak well mouth sealing device, comprise box body, polished rod, it is characterized in that: the stepped hole of box body lower end is that the threaded cylindrical of screwed hole and the little four-way of well head matches, joint ring is provided with in hole in the middle part of box body, the outer peripheral face of capping is provided with the screw thread with the corresponding threaded holes of cassette upper end, spring and interior is provided with in hole in the middle part of box body, outside envelope, the bottom of the outer peripheral face of described interior big envelope is the conical surface that upper end diameter is large and lower end diameter is little, top is step cylinder, it is annular groove face between the conical surface and step cylinder, the upper surface of step cylinder on described top contacts with the lower surface of capping, the cone of described interior big envelope bottom is the block composition be uniformly distributed along the circumference, each block is the block with axial oblique, the upper end of each block is connected with annular trough body, the endoporus of outside envelope is the taper hole matched with the male cone (strobilus masculinus) of described interior big envelope, the outer cylinder of this outside envelope and its outer big envelope bore match, described spring is placed between described joint ring and outside envelope, the sliding sealing annular distance fitted in box body of polished rod, in interior big envelope hole and capping hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420843245.6U CN204457561U (en) | 2014-12-29 | 2014-12-29 | A kind of anti-leak well mouth sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420843245.6U CN204457561U (en) | 2014-12-29 | 2014-12-29 | A kind of anti-leak well mouth sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204457561U true CN204457561U (en) | 2015-07-08 |
Family
ID=53664463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420843245.6U Expired - Fee Related CN204457561U (en) | 2014-12-29 | 2014-12-29 | A kind of anti-leak well mouth sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204457561U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563942A (en) * | 2014-12-29 | 2015-04-29 | 新乡市乔山机械设备有限公司 | Anti-leakage wellhead sealing device |
-
2014
- 2014-12-29 CN CN201420843245.6U patent/CN204457561U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563942A (en) * | 2014-12-29 | 2015-04-29 | 新乡市乔山机械设备有限公司 | Anti-leakage wellhead sealing device |
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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: 20150708 Termination date: 20151229 |
|
| EXPY | Termination of patent right or utility model |