CN2293638Y - Sucker rod centralizer - Google Patents
Sucker rod centralizer Download PDFInfo
- Publication number
- CN2293638Y CN2293638Y CN 97232884 CN97232884U CN2293638Y CN 2293638 Y CN2293638 Y CN 2293638Y CN 97232884 CN97232884 CN 97232884 CN 97232884 U CN97232884 U CN 97232884U CN 2293638 Y CN2293638 Y CN 2293638Y
- Authority
- CN
- China
- Prior art keywords
- oil pumping
- pumping rod
- central axis
- center shaft
- centralizer 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 relates to an oil pumping rod centralizer. The oil pumping rod centralizer is composed of a center shaft and a centralizing body. Two ends of the center shaft are provided with oil pumping rod threads. The outer surface of the centralizing body is provided with an axial groove. The middle of the center shaft is provided with a thin neck. The centralizing body is made from nylon or other abrasion-proof and abrasion reducing materials. The centralizing body is cast on the thin neck of the center shaft. The outer diameter of the centralizing body is greater than the maximum outer diameter of the center shaft. The oil pumping rod centralizer has good centralizing effect, no rotating member, simple structure, and small friction force. The oil pumping rod centralizer is free from the influence of mud and sand under a well, or other mechanical impurities.
Description
The utility model relates to a kind of oil pumping rod centering device.
Now Chang Yong oil pumping rod centering device is the roller type oil pumping rod centering device, and this centralizer is made up of main body and roller, is processed with axial strip hole by certain angle on main body, dress roller in the hole, and roller is fixed by axle and main body, and roller diameter is greater than main diameter.When going into the well oil pumping rod centering device is connected on the rod string, rotates along with moving up and down of rod string drives roller, to reduce the wearing and tearing between sucker rod and the oil pipe.This structure is owing to be subjected to the restriction of oil pipe inside dimension, the roller thinner thickness, axial strip hole on the main body can not be too wide, thereby the roller and the gap between the main body that are loaded in it are very little, and the down-hole has sand or other mechanical admixture again often, enter its gap in the course of the work, roller is often by " stuck ", at this moment with the reciprocating motion of sucker rod, with regard to the heavy wear oil pipe, antifriction can not be set upright, wearing and tearing can be aggravated on the contrary.
The purpose of this utility model is to provide a kind of oil pumping rod centering device at above-mentioned the deficiencies in the prior art part, and this oil pumping rod centering device does not have tumbler, and is simple in structure, sets upright effectively, and frictional force is little, is not subjected to the influence of down-hole silt or other mechanical admixture.
The purpose of this utility model is achieved through the following technical solutions: this oil pumping rod centering device is made up of central axis and centralizer body, there is the sucker rod screw thread at the central axis two ends, at the centralizer body external surface axial groove is arranged, one thin neck is arranged in the middle of the central axis, centralizer body is wear-resisting by nylon or other, antifriction material is made, be injection-moulded on the thin neck of central axis, the centralizer body external diameter is greater than the central axis maximum outside diameter.Oil pumping rod centering device is installed in the pumpingh well on the rod string, when the upper and lower reciprocating motion of rod string,, can sets upright rod string in oil pipe, set upright effective because the centralizer body external diameter on the oil pumping rod centering device is worked energetically the maximum outside diameter of central axis.Centralizer body is made by nylon or other wear resistant friction reducing material, is injection-moulded on the thin neck of central axis, and is simple in structure, is not subjected to the influence of silt or other mechanical admixture when using in the down-hole, and easy to use, the frictional force between centralizer body and the oil pipe is little.
The utility model compared with prior art has following advantage: this oil pumping rod centering device, and simple in structure, cost is low, is not subjected to the influence of silt or other mechanical admixture when using in the down-hole, and easy to use, the frictional force between centralizer body and the oil pipe is little.
Accompanying drawing 1 is the overall structure schematic diagram of oil pumping rod centering device; Accompanying drawing 2 is its A-A sectional drawings.
Below in conjunction with accompanying drawing in detail embodiment of the present utility model is described in detail: this oil pumping rod centering device, form by central axis 4 and centralizer body 3, there is sucker rod screw thread 1 at central axis 4 two ends, at centralizer body 3 external surfaces axial groove 5 is arranged, one thin neck 2 is arranged in the middle of the central axis 4, centralizer body 3 is made by nylon or other wear resistant friction reducing material, is injection-moulded on the thin neck 2 of central axis 4, and centralizer body 3 external diameters are greater than the maximum outside diameter of central axis 4.
When going into the well, oil pumping rod centering device connected at a certain distance by hole deviation and rod sag situation be distributed on the rod string that is easy to wear and tear, when the upper and lower reciprocating motion of rod string, because the external diameter of the centralizer body 3 on the oil pumping rod centering device is greater than the maximum outside diameter of central axis 4, thereby set upright rod string in oil pipe.Centralizer body 3 is made by nylon or other wear resistant friction reducing material, is injection-moulded on the thin neck 2 of central axis 4, and is simple in structure, be not subjected to the influence of silt or other mechanical admixture when using in the down-hole, easy to use, can rub for a long time with tube inner wall is not worn, the oil pipe that also can not wear and tear, frictional force is little.
Claims (1)
1, a kind of oil pumping rod centering device, form by central axis and centralizer body, there is the sucker rod screw thread at the central axis two ends, at the centralizer body external surface axial groove is arranged, it is characterized in that in the middle of the central axis a thin neck being arranged, centralizer body is made by nylon or other wear resistant friction reducing material, is injection-moulded on the thin neck of central axis, and the centralizer body external diameter is greater than the central axis maximum outside diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97232884 CN2293638Y (en) | 1997-04-30 | 1997-04-30 | Sucker rod centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97232884 CN2293638Y (en) | 1997-04-30 | 1997-04-30 | Sucker rod centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2293638Y true CN2293638Y (en) | 1998-10-07 |
Family
ID=33944602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97232884 Expired - Fee Related CN2293638Y (en) | 1997-04-30 | 1997-04-30 | Sucker rod centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2293638Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979817A (en) * | 2010-11-24 | 2011-02-23 | 西南石油大学 | Ditrigonal centralizer |
| CN103982144A (en) * | 2014-05-19 | 2014-08-13 | 张家口中地装备探矿工程机械有限公司 | Rod body material collection type centralizing sucker rod and casting method thereof |
| CN106014270A (en) * | 2016-05-13 | 2016-10-12 | 邓义龙 | Drill rod assembly for rock engineering |
| CN113530472A (en) * | 2020-04-15 | 2021-10-22 | 扬州市江都区人和机械有限公司 | Nylon sliding block centralizer |
-
1997
- 1997-04-30 CN CN 97232884 patent/CN2293638Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979817A (en) * | 2010-11-24 | 2011-02-23 | 西南石油大学 | Ditrigonal centralizer |
| CN103982144A (en) * | 2014-05-19 | 2014-08-13 | 张家口中地装备探矿工程机械有限公司 | Rod body material collection type centralizing sucker rod and casting method thereof |
| CN106014270A (en) * | 2016-05-13 | 2016-10-12 | 邓义龙 | Drill rod assembly for rock engineering |
| CN113530472A (en) * | 2020-04-15 | 2021-10-22 | 扬州市江都区人和机械有限公司 | Nylon sliding block centralizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |