CN204532134U - Polish rod thread-off preventing device - Google Patents
Polish rod thread-off preventing device Download PDFInfo
- Publication number
- CN204532134U CN204532134U CN201520159736.3U CN201520159736U CN204532134U CN 204532134 U CN204532134 U CN 204532134U CN 201520159736 U CN201520159736 U CN 201520159736U CN 204532134 U CN204532134 U CN 204532134U
- Authority
- CN
- China
- Prior art keywords
- box cupling
- polished rod
- upper box
- rod body
- face
- 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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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The utility model discloses a kind of polish rod thread-off preventing device, comprise polished rod body, the top of polished rod body is installed with lower box cupling and upper box cupling from down to up respectively by being threaded, the outer wall of upper and lower box cupling arranges draw-in groove respectively, upper box cupling end face is hemispherical face, arrange Compress Spring between upper box cupling inner top and polished rod body top, lower box cupling top and upper box cupling bottom offset.When the utility model uses, due to spherical in shape of upper box cupling end face, and in upper box cupling, Compress Spring is set, such one side can disperse the impact between polished rod box cupling and pumping unit horsehead, polished rod box cupling loose or dislocation can be avoided on the other hand, after avoiding holddown, polished rod hits curved phenomenon, reduces workover treatment, guarantees to produce and normally carries out.
Description
Technical field
The utility model relates to a kind of polish rod thread-off preventing device of field produces.
Background technology
In field produces, along with oil pumper moves up and down, polished rod box cupling often collides pumping unit horsehead, causes polished rod box cupling to loosen, come off, then causes holddown accident, along with oil pumper is descending, hits curved polished rod, causes oil well normally not produce.
Summary of the invention
The purpose of this utility model is to provide a kind of polish rod thread-off preventing device, and can prevent polished rod from loosening, coming off, after avoiding holddown, polished rod hits curved phenomenon, reduces workover treatment, guarantees to produce and normally carries out.
The purpose of this utility model realizes like this, a kind of polish rod thread-off preventing device, comprise polished rod body, the top of polished rod body is installed with lower box cupling and upper box cupling from down to up respectively by being threaded, the outer wall of upper and lower box cupling arranges draw-in groove respectively, upper box cupling end face is hemispherical face, arranges Compress Spring between upper box cupling inner top and polished rod body top, and lower box cupling top and upper box cupling bottom offset.
When the utility model uses, due to spherical in shape of upper box cupling end face, and in upper box cupling, Compress Spring is set, such one side can disperse the impact between polished rod box cupling and pumping unit horsehead, polished rod box cupling loose or dislocation can be avoided on the other hand, after avoiding holddown, polished rod hits curved phenomenon, reduces workover treatment, guarantees to produce and normally carries out.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is that master of the present utility model looks cross-sectional view.
Detailed description of the invention
A kind of polish rod thread-off preventing device, as shown in Figure 1, comprise polished rod body 1, the top of polished rod body 1 is installed with lower box cupling 2 and upper box cupling 4 from down to up respectively by being threaded, the outer wall of upper and lower box cupling is arranged respectively draw-in groove 3,5, upper box cupling end face 4 is in hemispherical face, and arrange Compress Spring 6 between upper box cupling inner top and polished rod body top, lower box cupling top and upper box cupling bottom offset.
Claims (1)
1. a polish rod thread-off preventing device, comprise polished rod body, it is characterized in that: the top of polished rod body is installed with lower box cupling and upper box cupling from down to up respectively by being threaded, the outer wall of upper and lower box cupling arranges draw-in groove respectively, upper box cupling end face is hemispherical face, arrange Compress Spring between upper box cupling inner top and polished rod body top, lower box cupling top and upper box cupling bottom offset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520159736.3U CN204532134U (en) | 2015-03-20 | 2015-03-20 | Polish rod thread-off preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520159736.3U CN204532134U (en) | 2015-03-20 | 2015-03-20 | Polish rod thread-off preventing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204532134U true CN204532134U (en) | 2015-08-05 |
Family
ID=53746157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520159736.3U Expired - Fee Related CN204532134U (en) | 2015-03-20 | 2015-03-20 | Polish rod thread-off preventing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204532134U (en) |
-
2015
- 2015-03-20 CN CN201520159736.3U patent/CN204532134U/en not_active Expired - Fee Related
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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: 20150805 Termination date: 20200320 |