CN201891393U - Eccentric wear prevention ball centralizer - Google Patents
Eccentric wear prevention ball centralizer Download PDFInfo
- Publication number
- CN201891393U CN201891393U CN2010206653278U CN201020665327U CN201891393U CN 201891393 U CN201891393 U CN 201891393U CN 2010206653278 U CN2010206653278 U CN 2010206653278U CN 201020665327 U CN201020665327 U CN 201020665327U CN 201891393 U CN201891393 U CN 201891393U
- Authority
- CN
- China
- Prior art keywords
- centralizer
- ball
- pressure cap
- eccentric wear
- milling
- 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 the technical field of oil exploitation, in particular to a ball centralizer capable of preventing eccentric wear between a pipe column and a sleeve during the milling and fishing of a horizontal well. The centralizer comprises an upper connector, a pressure cap, a lower connector and balls, wherein the pressure cap is mounted between the upper and the lower connectors and is tightly pressed; and the balls are mounted in a groove of the pressure cap and are vertically arranged. Through the ball centralizer, the frictional resistance between a drill rod and the sleeve is reduced, the flow area of workover fluid is increased, and clastics are prevented from being buried or blocking a drill, so that the milling and fishing construction efficiencies are improved. The ball centralizer overcomes the defects that the frictional resistance between the drill rod and the sleeve is large and the flow area of the workover fluid is reduced when the conventional centralizer works.
Description
Technical field:
The utility model relates to a kind of technical field of petroleum extraction, particularly a kind of ball centralizer that prevents tubing string and sleeve pipe generation eccentric wear in horizontal well milling, salvaging process.
Background technology:
In oilfield development process, horizontal well more and more is subjected to the attention in each oil field, so we are faced with the challenge of the horizontal well well workover technology more complicated than straight well well workover.In the straight well well workover process of routine, follow sleeve pipe generation eccentric wear accident for avoiding drill string, during construction, usually on tubing string, connect large diameter centralizer and just can meet the demands.But in horizontal well well workover process, this major diameter centralizer not only is difficult to enter inclination section, also can not avoid the accident of drill string and sleeve pipe eccentric wear at all.Large diameter in addition centralizer has reduced area of passage at inclination section, causes the workover fluid circulation resistance excessive, returns difficulty on the clast, very easily causes the operating tool string jam.
The utility model content:
The technical problems to be solved in the utility model provides a kind of anti-eccentric wear ball centralizer, this centralizer has been realized frictional resistance between minimizing drilling rod and the sleeve pipe, increased the area of passage of workover fluid, prevent that clast from burying or the generation of bit freezing situation, thereby improved the efficiency of construction of milling and salvaging.When having overcome the work of existing centralizer between drilling rod and the sleeve pipe frictional resistance big and reduce the deficiency of the area of passage of workover fluid.
Technical solution adopted in the utility model is: a kind of anti-eccentric wear ball centralizer, form by top connection, pressure cap, lower contact and ball; Pressure cap is contained between top connection and the lower contact, and is fastened; Ball is contained in the groove of pressure cap, and is rectilinear arrangement.
The beneficial effects of the utility model are: the utility model is owing to adopted ball to be contained in structure in the groove of pressure cap, thereby has a function that the sliding friction that makes between drilling rod and the sleeve pipe changes rolling friction in horizontal well, reduce frictional resistance between drilling rod and the sleeve pipe, the application life of having improved drill string; The utility model has been owing to adopted ball to be rectilinear arrangement mode, thereby has the effect of the area of passage that increases workover fluid, prevents that clast from burying or the generation of bit freezing situation.The utlity model has simplicity of design, characteristics such as working procedure is few, and is easy to operate have improved that horizontal well is salvaged or the once success rate of milling, have reduced cost of production.
Description of drawings:
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment:
As shown in drawings, a kind of anti-eccentric wear ball centralizer is made up of top connection 1, pressure cap 2, lower contact 3 and ball 4; Pressure cap 2 is contained between top connection 1 and the lower contact 3, and is fastened; Ball 4 is contained in the groove of pressure cap 2, and is rectilinear arrangement.
The utility model is installed on the drill string, and it is transferred to the horizontal well inclination section according to designing requirement, when drill string is being salvaged or during the milling rotation, the utility model utilizes ball 4 that the sliding friction of drill string and sleeve pipe is converted to rolling friction, thereby avoid the wearing and tearing between drill string and the sleeve pipe, reach the purpose of anti-eccentric wear, because the rotation of ball 4 has reduced the rotational resistance of drill string, improved the efficiency of construction of horizontal well milling or salvaging in addition.
The utility model is in Liaohe Oil Field promotion engineering place successful implementation and application.
Claims (1)
1. an anti-eccentric wear ball centralizer is made up of top connection (1), pressure cap (2), lower contact (3) and ball (4); It is characterized in that: pressure cap (2) is contained between top connection (1) and the lower contact (3), and is fastened; Ball (4) is contained in the groove of pressure cap (2), and is rectilinear arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206653278U CN201891393U (en) | 2010-12-17 | 2010-12-17 | Eccentric wear prevention ball centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206653278U CN201891393U (en) | 2010-12-17 | 2010-12-17 | Eccentric wear prevention ball centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201891393U true CN201891393U (en) | 2011-07-06 |
Family
ID=44220870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206653278U Expired - Fee Related CN201891393U (en) | 2010-12-17 | 2010-12-17 | Eccentric wear prevention ball centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201891393U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775014A (en) * | 2012-12-14 | 2014-05-07 | 贵州高峰石油机械股份有限公司 | Grinding shoe used for grinding and milling under the shaft of oil field and manufacturing method thereof |
| CN105134101A (en) * | 2015-08-21 | 2015-12-09 | 西南石油大学 | Deepwater drilling riser and drill pipe anti-abrasion anti-attrition protection device |
-
2010
- 2010-12-17 CN CN2010206653278U patent/CN201891393U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775014A (en) * | 2012-12-14 | 2014-05-07 | 贵州高峰石油机械股份有限公司 | Grinding shoe used for grinding and milling under the shaft of oil field and manufacturing method thereof |
| CN105134101A (en) * | 2015-08-21 | 2015-12-09 | 西南石油大学 | Deepwater drilling riser and drill pipe anti-abrasion anti-attrition protection device |
| CN105134101B (en) * | 2015-08-21 | 2017-05-24 | 西南石油大学 | Deepwater drilling riser and drill pipe anti-abrasion anti-attrition protection device |
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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: 20110706 Termination date: 20111217 |