CN2120175U - Low friction resistance casing centralizer - Google Patents
Low friction resistance casing centralizer Download PDFInfo
- Publication number
- CN2120175U CN2120175U CN 91224622 CN91224622U CN2120175U CN 2120175 U CN2120175 U CN 2120175U CN 91224622 CN91224622 CN 91224622 CN 91224622 U CN91224622 U CN 91224622U CN 2120175 U CN2120175 U CN 2120175U
- Authority
- CN
- China
- Prior art keywords
- centralizer
- well
- utility
- model
- casing
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
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- Earth Drilling (AREA)
Abstract
A rigid supporting casing centralizer for casing cementing operation of highly deviated wells and horizontal wells. The utility model discloses a method of inlaying the rolling steel ball on supporting blade (righting strip), make the sliding friction between centralizer and the wall of a well become rolling friction, greatly reduced the frictional resistance of low pipe sleeve in-process, be favorable to the smooth completion of the sleeve pipe well cementation operation of highly deviated well and horizontal well. The utility model has simple structure and easy manufacture.
Description
The utility model relates to a kind of casing stabbing board that big Dou degree well and horizontal cementing are used that is used for.
In the prior art, the casing stabbing board that is used for the casing cementing operation has two kinds of forms.A kind of is arc flexible type, and another kind is the rigid support formula.For arc flexible type centralizer, when well Dou angle was excessive, lateral force obviously increased, and did not consider to be used for big Dou degree well and horizontal well usually.Though rigid support formula centralizer has overcome the shortcoming of flexible type centralizer, owing in the setting of casing process, have sliding friction between its hard blade (righting strip) and stratum or upper strata sleeve pipe.When carrying out the casing job of big Dou degree well or horizontal well, along with the increase of well Dou,, have a strong impact on casing safety and successfully assign desired depth, for bottom drillng operation or completion practice bring very big difficulty to making force of sliding friction become very big.
The purpose of this utility model is to design a kind of low frictional resistance casing stabbing board that is applicable to big Dou degree and the operation of horizontal well casing job pipe.
The utility model is achieved in that inlays some steel balls that can roll (3) on the supporting blade of rigidity centralizer (righting strip) (1).Steel ball is by ball cover (4) location that is fixed on the centralizer supporting blade (righting strip).Steel ball can roll in ball cover.So just the sliding friction of former centralizer is become rolling friction, thereby reach the purpose that reduces the friction factor between the centralizer and the borehole wall.
Advantage of the present utility model is: simple in structure, suitable, and processing and manufacturing easily.
Description of drawings:
Fig. 1 is the utility model front view;
Fig. 2 is the utility model vertical view;
Among the figure: 1---be centralizer supporting blade (righting strip) 2---be the centralizer main body, 3---be rolling steel balls, 4---be ball cover.
Claims (1)
1, a kind of low frictional resistance casing stabbing board is made up of centralizer main body and centralizer supporting blade (righting strip), it is characterized in that having on the supporting blade (righting strip) some steel balls that can roll, and steel ball is located by the ball cover on the supporting blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91224622 CN2120175U (en) | 1991-08-24 | 1991-08-24 | Low friction resistance casing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91224622 CN2120175U (en) | 1991-08-24 | 1991-08-24 | Low friction resistance casing centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2120175U true CN2120175U (en) | 1992-10-28 |
Family
ID=4931053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91224622 Granted CN2120175U (en) | 1991-08-24 | 1991-08-24 | Low friction resistance casing centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2120175U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060660A (en) * | 2016-12-22 | 2017-08-18 | 中国石油天然气集团公司 | Deepwater drilling pipe |
-
1991
- 1991-08-24 CN CN 91224622 patent/CN2120175U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060660A (en) * | 2016-12-22 | 2017-08-18 | 中国石油天然气集团公司 | Deepwater drilling pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |