CN202745732U - Low friction sucker rod centering device - Google Patents
Low friction sucker rod centering device Download PDFInfo
- Publication number
- CN202745732U CN202745732U CN 201220364804 CN201220364804U CN202745732U CN 202745732 U CN202745732 U CN 202745732U CN 201220364804 CN201220364804 CN 201220364804 CN 201220364804 U CN201220364804 U CN 201220364804U CN 202745732 U CN202745732 U CN 202745732U
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- CN
- China
- Prior art keywords
- sucker rod
- centering
- low friction
- centering device
- centering body
- 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 low friction sucker rod centering device. The low friction sucker rod centering device is designed for centering a sucker rod, reducing abrasion of a pipe rod and prolonging a production cycle of an oil well. A mandrel is connected with an upper joint of the centering device. The mandrel is provided with a centre hole connected with the sucker rod. A pressing sleeve is connected with a lower joint of the mandrel. A centering body is arranged on the mandrel in a sleeved mode. The centering body is arranged between the upper joint and the pressing sleeve. The periphery surface of the centering body is composed of three cambered surfaces of 110 degrees. The curvature of the cambered surface is the same as that of an inner wall of an oil pipe. A solid lubrication coating is arranged on the periphery surface of the centering body. When the low friction sucker rod centering device is on a working condition under the oil well, the periphery surface of the centering body is surface contacted with the inner wall of the oil pipe. Compared with the line contact between the periphery surface of the conventional centering body and the inner wall of the oil pipe, the low friction sucker rod centering device greatly increases contact area. Therefore, under the same acting force, the low friction sucker rod centering device greatly decreases contact stress between the centering body and the oil pipe, reduces friction between the sucker rod and the oil pipe during an oil extraction process, and prolongs service life of the centering body.
Description
Technical field
The utility model relates to a kind of low frictional resistance oil pumping rod centering device, belongs to oil extraction in oil field skill technical field.
Background technology
In oil field development, the application of directional well and high angle hole is increasing, and the eccentric wear problem between the oil well pipe bar has become one of principal element of impact production.At present, oil pumping rod centering device commonly used mainly contains rolling wheel centralizer, nylon centralising device and two-way protective coupling etc., and rolling wheel centralizer can become rolling friction with the sliding friction between the pipe bar, reduces friction factor, but roller easily is stuck on steady pin, causes rotating dumb; Nylon centralising device adopts in metal surface formation solid lubrication and reduces wearing and tearing, but the nylon centralising device heat resistance is relatively poor, and the bulk material wearing and tearing are very fast, and the underground work life-span is shorter, can't avoid managing bar fully and wear and tear; Two-way protective coupling external surface spraying plating solid lubricant can reduce the friction factor between the pipe bar, but they is different from tube inner wall curvature, and the pressure of linear contact is larger each other, effectively wear prevention.
Summary of the invention
The purpose of this utility model is to provide a kind of low frictional resistance oil pumping rod centering device, and it has centering sucker rod, reduces the wearing and tearing of pipe bar, improves the characteristics such as service life of equipment and prolongation oil well production cycle.
Concrete technical scheme of the present utility model is as follows:
Top connection connects axle, and axle is provided with the centre bore of connecting with pumping rod, and the axle lower end is lower contact, and lower contact connects gland.Be the centralizer body that is sleeved on the axle between top connection and gland, the centralizer body outer peripheral face is comprised of three 110 ° cambered surface, and cambered surface curvature is identical with tube inner wall cambered surface curvature.The centralizer body outer peripheral face is provided with solid lubricant coating.
Under the underground work state, the utility model centralizer body outer peripheral face is that face contacts with tube inner wall, contact with the line of tube inner wall compared to conventional centralizer body periphery, contact area increases a lot, therefore, under equivalent effect power, the contact stress of centralizer body and oil pipe will be reduced greatly, reduce the wearing and tearing of sucker rod and tube inner wall in the oil recovery process, prolongation centralizer body application life.
Description of drawings
Fig. 1 is low frictional resistance oil pumping rod centering device structural representation.
Fig. 2 is the A-A sectional view of centralizer body among Fig. 1.
The specific embodiment
With reference to Fig. 1 and 2 embodiment of the present utility model is further specified:
Embodiment:
Low frictional resistance oil pumping rod centering device is comprised of top connection 1, axle 2, centralizer body 3, gland 4 and lower contact 5.
Claims (1)
1. one kind low frictional resistance oil pumping rod centering device is characterized in that:
Top connection (1) connects axle (2), and axle (2) is provided with the centre bore (6) of connecting with pumping rod, and axle (2) lower end is lower contact (5), and lower contact (5) connects gland (4); Be the centralizer body (3) that is sleeved on the axle (2) between top connection (1) and gland (4), centralizer body (3) outer peripheral face is comprised of three 110 ° cambered surface, and cambered surface curvature is identical with tube inner wall cambered surface curvature; Centralizer body (3) outer peripheral face is provided with solid lubricant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220364804 CN202745732U (en) | 2012-07-26 | 2012-07-26 | Low friction sucker rod centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220364804 CN202745732U (en) | 2012-07-26 | 2012-07-26 | Low friction sucker rod centering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202745732U true CN202745732U (en) | 2013-02-20 |
Family
ID=47705149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220364804 Expired - Fee Related CN202745732U (en) | 2012-07-26 | 2012-07-26 | Low friction sucker rod centering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202745732U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074475A (en) * | 2013-03-25 | 2014-10-01 | 中国石油化工股份有限公司 | Sucker rod centralizer for full metal screw pump lifting |
-
2012
- 2012-07-26 CN CN 201220364804 patent/CN202745732U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074475A (en) * | 2013-03-25 | 2014-10-01 | 中国石油化工股份有限公司 | Sucker rod centralizer for full metal screw pump lifting |
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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: 20130220 Termination date: 20210726 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |