CN202300228U - Anti-falling centering device - Google Patents
Anti-falling centering device Download PDFInfo
- Publication number
- CN202300228U CN202300228U CN2011203470621U CN201120347062U CN202300228U CN 202300228 U CN202300228 U CN 202300228U CN 2011203470621 U CN2011203470621 U CN 2011203470621U CN 201120347062 U CN201120347062 U CN 201120347062U CN 202300228 U CN202300228 U CN 202300228U
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- CN
- China
- Prior art keywords
- centering sleeve
- steel balls
- centralizer
- cover
- diameter
- 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 high-temperature and abrasion-resistant hollow rod centering sleeve which comprises a centering sleeve body and a centering sleeve arranged on the centering sleeve body. A metal skeleton is arranged between the inner peripheral surface and the outer peripheral surface of the centering sleeve; and an abrasion-resistant ring is arranged on the inner peripheral surface of the centering sleeve. As the metal skeleton is arranged between the inner peripheral surface and the outer peripheral surface of the centering sleeve, the centering sleeve is forcefully supported, so that even if the centering sleeve continuously works at a high temperature of 80-150 DEG C, the centering sleeve not only can not be fatigued and weak, but also can not deform. Meanwhile, as the abrasion-resistant ring is arranged on the inner wall surface of the centering sleeve, the abrasion resistance of the centering sleeve is greatly increased, and the service life of the centering sleeve is prolonged.
Description
Technical field
The utility model relates to oil field equipment, is specifically related to the centralizer on the down-hole oil production bar of oil field.
Background technology
In China's field produces well, about 80 ﹪ use oil pumping machine oil pumping, as far as the sucker rod in underground work, all will establish centralizer, to guarantee the straightness accuracy of sucker rod.The centralizer of sucker rod by centralizer body, be located at the box cupling of centralizer body one end; And the supporting positive cover formation of being located at the centralizer body middle part, box cupling wherein is enclosed within on the axle of centralizer body one end by the box cupling cover, and the box cupling cover sways in its course of work; Between both fitting faces, be provided with rolling steel balls; At present, generally all between both fitting faces, be provided with two rolling steel balls that diameter is identical, because box cupling cover speed is higher; The long-term use is prone to cause the phenomenon that comes off behind the worn steel ball to take place, and brings potential safety hazard to production.
Summary of the invention
The technical problem that the utility model will solve provides a kind of slip-off preventing centralizer, overcomes the deficiency that prior art exists.
The utility model is realized through following technical scheme:
A kind of slip-off preventing centralizer; Comprise centralizer body and the supporting positive cover on it is set; Be arranged at the box cupling cover on the centralizer body one end axle; Be provided with rolling steel balls between the fitting face of said axle and box cupling cover, it is characterized in that: said rolling steel balls is provided with three, and three steel balls have at least the diameter of two kinds of specifications to constitute.
The further improvement project of the utility model is, the equal diameters of two steel balls in said three rolling steel balls, and greater than another steel ball size.
The further improvement project of the utility model is that the steel ball equidistance that diameter is little is arranged between two major diameter steel balls.The small ball diameter is 1/3rd to 1/2nd of a big steel ball diameter.
The utility model further improvement project is, the rolling steel balls surface is provided with wearing layer, and axle and box cupling cover also are provided with wearing layer with the steel ball contact surface.Said wearing layer is a carburized layer.
The utility model compared with prior art has following obvious advantage:
One, the utility model is provided with three rolling steel balls that diameter is different, reasonable stress between the fitting face of axle and box cupling cover.
Two, the utility model is provided with wearing layer at steel ball surface, axle and box cupling cover with the steel ball contact surface, therefore, has improved the anti-wear performance of steel ball greatly, and through the long-time proof of using, anti-wear performance is superior.
Description of drawings
Fig. 1 is the axial partial schematic sectional view of the utility model.
Fig. 2 is the centralizer body sketch map.
Fig. 3 is axial cross-sectional schematic for box cupling overlaps.
The specific embodiment
As shown in Figure 1, the utility model comprises centralizer body 1 and the supporting positive cover 3 on it is set, and is arranged at the box cupling cover 2 on the centralizer body 1 one end axles.
Still as shown in Figure 1; Between the fitting face of axle and box cupling cover, be provided with rolling steel balls, said rolling steel balls is provided with three, the equal diameters of two steel balls in three rolling steel balls; And greater than another steel ball size, steel ball 5 equidistance that diameter is little are arranged at two major diameter steel balls 4, between 6.In the present embodiment, the diameter of two major diameter steel balls is respectively 12 centimetres, and the diameter of small ball is 8 centimetres.The rolling steel balls surface is provided with wearing layer (diagram is not provided).
Like Fig. 2, shown in 3, axle and box cupling cover are respectively equipped with wearing layer 7,8 with the steel ball contact surface.In the present embodiment, said wearing layer is a carburized layer.
Claims (5)
1. slip-off preventing centralizer; Comprise centralizer body and the supporting positive cover on it is set; Be arranged at the box cupling cover on the centralizer body one end axle; Be provided with rolling steel balls between the fitting face of said axle and box cupling cover, it is characterized in that: said rolling steel balls is provided with three, and three steel balls have at least the diameter of two kinds of specifications to constitute.
2. a kind of slip-off preventing centralizer as claimed in claim 1 is characterized in that: the equal diameters of two steel balls in said three rolling steel balls, and greater than another steel ball size.
3. according to claim 1 or claim 2 a kind of slip-off preventing centralizer, it is characterized in that: the steel ball equidistance that diameter is little is arranged between two major diameter steel balls.
4. according to claim 1 or claim 2 a kind of slip-off preventing centralizer, it is characterized in that: the small ball diameter is 1/3rd to 1/2nd of a big steel ball diameter.
5. according to claim 1 or claim 2 a kind of slip-off preventing centralizer, it is characterized in that: the rolling steel balls surface is provided with wearing layer, and axle and box cupling cover also are provided with wearing layer with the steel ball contact surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203470621U CN202300228U (en) | 2011-09-16 | 2011-09-16 | Anti-falling centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203470621U CN202300228U (en) | 2011-09-16 | 2011-09-16 | Anti-falling centering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202300228U true CN202300228U (en) | 2012-07-04 |
Family
ID=46369150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203470621U Expired - Fee Related CN202300228U (en) | 2011-09-16 | 2011-09-16 | Anti-falling centering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202300228U (en) |
-
2011
- 2011-09-16 CN CN2011203470621U patent/CN202300228U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20120916 |