CN2799838Y - Screw type pumping rod centralizer - Google Patents
Screw type pumping rod centralizer Download PDFInfo
- Publication number
- CN2799838Y CN2799838Y CN 200520083691 CN200520083691U CN2799838Y CN 2799838 Y CN2799838 Y CN 2799838Y CN 200520083691 CN200520083691 CN 200520083691 CN 200520083691 U CN200520083691 U CN 200520083691U CN 2799838 Y CN2799838 Y CN 2799838Y
- Authority
- CN
- China
- Prior art keywords
- centralizing
- centralizer
- centralizer body
- centralizing body
- sucker rod
- 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 spiral type centralizer for a sucker rod. The centralizer is composed of a centralizing body (5), an upper joint (4), a lower joint (8), a centralizing external pipe (6), etc., wherein the centralizing body (5) is a hollow rod, the external part is provided with the centralizing external pipe (6), a pull rod (7) is arranged in the centralizing body (5), the upper end and the lower end of the centralizing body (5) are provided with the upper joint (4) and the lower joint (8), and the upper joint (4) is provided with a plurality of spiral slotted holes which are communicated with internal holes of the centralizing body (5). In the process of pumping oil, well fluid in an oil pipe at the lower part of the centralizing body (5) is discharged into ring-shaped space of the centralizing body (5) and the pull rod (7) through a side hole of the lower joint (8), when crude oil passes through the spiral slotted holes of the upper joint (4), the centralizing body (5) is pushed by fluid power to rotate, and the eccentric wear of the centralizing body (5) caused by itself is effectively prevented, the service life of the centralizer for a sucker rod and the centralizing effect of a sucker rod is improved.
Description
Technical field
The utility model relates to a kind of spiral oil pumping rod centering device, is specially adapted in the inclined shaft mechanical oil production system.
Background technology
In the bar oil-extracting well was arranged, particularly in deep-well or the inclined shaft, sucker rod was flexible in the oil pipe content at present, the phase attrition in upper and lower stroke of oil pipe, sucker rod occurred and rubbed and cause sucker rod partial wear, therefore, needed the lower sucker rod centralizer to solve the eccentric wear problem.Existing oil pumping rod centering device kind is more, mainly contain two big classes: a class is the rolling centralizer, 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.Roller rolls on tube inner wall, and roller material adopts the higher metal material of hardness, and when the down-hole shakes out or other mechanical admixture, roller is often caused setting upright inefficacy by " stuck " in the course of the work, because wearing and tearing oil pipe in hardness higher position has aggravated the oil pipe wearing and tearing; Another kind of is the nylon centralizer; make by nylon or other Wear-resistant material; be injection-moulded on the thin neck of centralizer central axis or sky is enclosed within on the centralizer central axis; when going into the well oil pumping rod centering device is connected on the rod string; contact with oil pipe by nylon; prevent the eccentric wear of sucker rod and oil pipe; because the abrasive resistance of nylon is lower; cause the nylon centralizer shorter application life; thereby centralizer lost efficacy after nylon may wear to a certain degree, and the back centralizer that lost efficacy does not just have the effect of protection sucker rod.
Summary of the invention
It is a kind of simple in structure that the purpose of this utility model is to provide, and sets upright effectively, wear-resistant, not influenced by down-hole silt or other mechanical admixture, and can be repeatedly used, and can effectively prevent the oil pumping rod centering device of centralizer body eccentric wear.
The utility model be achieved in that this centralizer by centralizer body, go up lower contact, set upright outer tube etc. and form, its centralizer body is a hollow stem, pipe is set upright in the outside, a pull bar is arranged in the centralizer body, the centralizer body upper and lower side has top connection and lower contact, last lower contact cooperates for movable with pull bar, and top connection has a plurality of spiral slotted eyes that communicate with the centralizer body endoporus, and lower contact has a plurality of slotted eyes that communicate with the centralizer body endoporus.Top connection is positioned at centralizer body on the pull bar by back of the body cap, back of the body cap is locked by jackscrew, it is loosening to prevent to carry on the back cap, centralizer body and pull bar can relatively rotate, the pull bar upper end is linked by rod head and top sucker rod, the pull bar bottom directly and sucker rod link, during use, to set upright outer tube earlier and be serially connected in the tubing string design attitude, to the serious well section of eccentric wear, centralizer body is serially connected in and is lowered in the sucker rod roofbolt in the oil pipe to setting upright in the outer tube, in oil pumping process with the oil pipe G.I.H, centralizer body moves up and down in setting upright outer tube, guarantee that sucker rod is placed in the middle in oil pipe, thereby play centralizing function, prevent sucker rod partial wear, well liquid in the oil pipe of centralizer body bottom enters the annular space of centralizer body and pull bar through the side opening of lower contact, entered in the oil pipe of top by top connection spiral slotted eye, when crude oil during through centralizer body top connection spiral slotted eye, centralizer body rotates under fluid power promotes, thereby effectively prevented the eccentric wear of centralizer body itself, improved the application life of oil pumping rod centering device.
Description of drawings:
Fig. 1 is the utility model structure principle chart
The specific embodiment:
This oil pumping rod centering device is by centralizer body (5), last lower contact (4) (8), set upright outer tube compositions such as (6), its centralizer body (5) is a hollow stem, outer tube (6) is set upright in the outside, a pull bar (7) is arranged in the centralizer body (5), centralizer body (5) upper and lower side has top connection (4) and lower contact (8), last lower contact (4) (8) cooperates for movable with pull bar (7), top connection (4) has a plurality of spiral slotted eyes that communicate with centralizer body (5) endoporus, lower contact (8) has a plurality of slotted eyes that communicate with centralizer body (5) endoporus, top connection (4) top is fixed on centralizer body (5) on the pull bar (7) by back of the body cap (2), back of the body cap (2) is locked by jackscrew (3), it is loosening to prevent to carry on the back cap (2), centralizer body (5) can relatively rotate with pull bar (7), pull bar (7) upper end is linked by rod head (1) and top sucker rod, pull bar (7) bottom directly and sucker rod link, during use, to set upright outer tube (6) earlier and be serially connected in the tubing string design attitude, with the oil pipe G.I.H to the serious well section of eccentric wear, centralizer body (5) is serially connected in and is lowered in the sucker rod roofbolt in the oil pipe to setting upright in the outer tube (6), thereby plays centralizing function.In oil pumping process, centralizer body (5) moves up and down in setting upright outer tube (6), guarantee that sucker rod is placed in the middle in oil pipe, thereby play centralizing function, prevent sucker rod partial wear, well liquid in the oil pipe of centralizer body (5) bottom enters the annular space of centralizer body (5) and pull bar (7) through the side opening of lower contact (8), enter in the oil pipe of top by top connection (4) spiral slotted eye, when crude oil during through top connection (4) spiral slotted eye, centralizer body (5) rotates under fluid power promotes, thereby effectively prevented the eccentric wear of centralizer body (5) itself, in the application life of having improved oil pumping rod centering device, improved the effect of setting upright sucker rod.
Claims (1)
1, a kind of spiral oil pumping rod centering device, it by centralizer body (5), go up lower contact (4) (8), set upright outer tube (7) etc. and form, it is characterized in that centralizer body (5) is a hollow stem, outer tube (6) is set upright in the outside, a pull bar (7) is arranged in the centralizer body (5), centralizer body (5) upper and lower side has top connection (4) and lower contact (8), and top connection (4) has a plurality of spiral slotted eyes that communicate with centralizer body (5) endoporus, and lower contact (8) has a plurality of slotted eyes that communicate with centralizer body (5) endoporus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520083691 CN2799838Y (en) | 2005-05-31 | 2005-05-31 | Screw type pumping rod centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520083691 CN2799838Y (en) | 2005-05-31 | 2005-05-31 | Screw type pumping rod centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2799838Y true CN2799838Y (en) | 2006-07-26 |
Family
ID=36842336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520083691 Expired - Fee Related CN2799838Y (en) | 2005-05-31 | 2005-05-31 | Screw type pumping rod centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2799838Y (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 |
| CN104047552A (en) * | 2014-05-20 | 2014-09-17 | 石东海 | Wear-resisting centralizer structure of sucker rod of oil well |
| CN108222856A (en) * | 2016-12-12 | 2018-06-29 | 四川煜天石油机械设备有限公司 | Wear-resisting rotary centralizer |
| CN108612487A (en) * | 2016-12-12 | 2018-10-02 | 四川煜天石油机械设备有限公司 | A kind of spinning centralizer |
-
2005
- 2005-05-31 CN CN 200520083691 patent/CN2799838Y/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 |
| CN104047552A (en) * | 2014-05-20 | 2014-09-17 | 石东海 | Wear-resisting centralizer structure of sucker rod of oil well |
| CN108222856A (en) * | 2016-12-12 | 2018-06-29 | 四川煜天石油机械设备有限公司 | Wear-resisting rotary centralizer |
| CN108612487A (en) * | 2016-12-12 | 2018-10-02 | 四川煜天石油机械设备有限公司 | A kind of spinning 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 |