CN201666125U - Roller-type centralizer - Google Patents
Roller-type centralizer Download PDFInfo
- Publication number
- CN201666125U CN201666125U CN2010201263548U CN201020126354U CN201666125U CN 201666125 U CN201666125 U CN 201666125U CN 2010201263548 U CN2010201263548 U CN 2010201263548U CN 201020126354 U CN201020126354 U CN 201020126354U CN 201666125 U CN201666125 U CN 201666125U
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- CN
- China
- Prior art keywords
- roller
- centralizer
- string
- oil
- well repair
- 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 provides a roller-type centralizer, which belongs to a device used for oil field production and comprises a centralizer body, wherein a plurality of pairs of roller supports are fixed at the outer side of the centralizer body; a roller is arranged between each pair of roller supports through a shaft; the inner side of the roller protrudes out of the inner wall of the centralizer body through a hole on the centralizer body, and the outer side thereof protrudes out of the outer end face of the roller support; and two ends of the centralizer body are respectively provided with a bearing pressure cap and another bearing pressure cap. When in use, the roller-type centralizer can be sleeved on a well repair pipe string; when in well repair operation, the roller is in contact with the inner wall of an oil-string casing to form a fulcrum, so that the well repair pipe string is not in contact with the oil-string casing, the sliding friction between the well repair pipe string and the oil-string casing is changed into the rolling friction between the oil-string casing and the roller, the resistance loss is reduced, the rotating torque transmission effect of the well repair pipe string is improved, and the oil-string casing is protected. The centralizer has obvious effect in the movable releasing and well repair construction operation.
Description
Technical field
The utility model provides a kind of field produces device, the erection device during especially a kind of workover treatment.
Background technology
In oil well repairing operation, because the centre-of gravity shift of well workover tubing string, can cause serious eccentric wear phenomenon occurring between interior well workover tubing string of horizontal well inclination section, increasing hole angle section and horizontal segment and production string, and repair and tubing string and production string between be pure sliding friction, caused excessive wear, shortened the application life of production string production string.
Summary of the invention
Technical problem to be solved in the utility model is, a kind of roller type centralizer is provided, and the well workover tubing string is to the eccentric wear of production string when alleviating workover treatment.
The utility model is to realize like this, the roller type centralizer, it has the centralizer main body, the centralizer main body outside is fixed with many pair rollers support, by axle roller is installed between each pair roller support, the inboard of roller by the hole on the centralizer main body protrude from the centralizer main body inner wall, the outside protrudes from the rolling wheel support outer face, centralizer main body two ends are separately installed with bearing pressure cap and another bearing pressure cap.
Adopt the roller type centralizer of said structure; can be sleeved on the well workover tubing string during use; during workover treatment; roller contacts with the inwall of production string and forms fulcrum, the well workover tubing string is not contacted, with the sliding friction between well workover tubing string and the production string with production string; become the rolling friction between production string and the roller; thereby reduced friction loss, improved the rotary torsion laser propagation effect of well workover tubing string, protected production string.This centralizer, effect is especially obvious in activity unfreezing well workover construction operation.
Description of drawings
Fig. 1 is the schematic diagram of the utility model structure.
The specific embodiment
The embodiment that provides below in conjunction with accompanying drawing further specifies concrete structure of the present utility model.
As shown in drawings, the roller type centralizer of the utility model, it has centralizer main body 6, the centralizer main body outside is fixed with many pair rollers support 4, by axle 3 roller 2 is installed between each pair roller support, the inboard of roller by the hole on the centralizer main body 5 protrude from the centralizer main body inner wall, the outside protrudes from the rolling wheel support outer face, centralizer main body two ends are separately installed with bearing pressure cap 1 and another bearing pressure cap 7.
The logarithm of rolling wheel support can determine generally have 4 pairs to get final product as required.Can by axle two rollers be installed respectively between each pair roller support.
During use, the centralizer of the utility model is sleeved on well workover tubing string outside, between two bearings pressure cap and centralizer main body bearing can be installed respectively, the interior ring of bearing contacts with well workover tubing string outer wall, outer shroud contacts with the inwall at the major diameter inner chamber place of bearing pressure cap.Again whole well workover tubing string is lowered in the production string.During workover treatment, roller both contacted with the production string inwall, contacted with centralizer main body outer wall again.Can determine the installation site of this centralizer on the well workover tubing string as required and quantity is installed.
Claims (1)
1. roller type centralizer, it is characterized in that, it has centralizer main body (6), the centralizer main body outside is fixed with many pair rollers support (4), by axle (3) roller (2) is installed between each pair roller support, the inboard of roller protrudes from the centralizer main body inner wall by the hole on the centralizer main body (5), the outside protrudes from the rolling wheel support outer face, and centralizer main body two ends are separately installed with bearing pressure cap (1) and another bearing pressure cap (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201263548U CN201666125U (en) | 2010-02-03 | 2010-02-03 | Roller-type centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201263548U CN201666125U (en) | 2010-02-03 | 2010-02-03 | Roller-type centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201666125U true CN201666125U (en) | 2010-12-08 |
Family
ID=43267084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201263548U Expired - Fee Related CN201666125U (en) | 2010-02-03 | 2010-02-03 | Roller-type centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201666125U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397856A (en) * | 2013-07-05 | 2013-11-20 | 渤海装备辽河重工有限公司 | Inclining and vertical well drilling rig automatic drill pipe slip device |
| CN103775005A (en) * | 2014-01-14 | 2014-05-07 | 河南理工大学 | Sucker rod anti-eccentric grinding device for coal-bed gas well |
| CN107762427A (en) * | 2016-08-18 | 2018-03-06 | 中国石油化工股份有限公司 | A kind of rigid centralizer |
-
2010
- 2010-02-03 CN CN2010201263548U patent/CN201666125U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397856A (en) * | 2013-07-05 | 2013-11-20 | 渤海装备辽河重工有限公司 | Inclining and vertical well drilling rig automatic drill pipe slip device |
| CN103775005A (en) * | 2014-01-14 | 2014-05-07 | 河南理工大学 | Sucker rod anti-eccentric grinding device for coal-bed gas well |
| CN107762427A (en) * | 2016-08-18 | 2018-03-06 | 中国石油化工股份有限公司 | A kind of rigid centralizer |
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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: 20101208 Termination date: 20110203 |