CN202745730U - hydraulic centralizer - Google Patents
hydraulic centralizer Download PDFInfo
- Publication number
- CN202745730U CN202745730U CN 201220337888 CN201220337888U CN202745730U CN 202745730 U CN202745730 U CN 202745730U CN 201220337888 CN201220337888 CN 201220337888 CN 201220337888 U CN201220337888 U CN 201220337888U CN 202745730 U CN202745730 U CN 202745730U
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- CN
- China
- Prior art keywords
- centralizer
- centralizing
- arm
- casing
- rights
- 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
Links
- 230000000694 effects Effects 0.000 abstract description 5
- 239000004568 cement Substances 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 abstract description 2
- 230000001788 irregular Effects 0.000 abstract description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model discloses a hydraulic pressure centralizer designs for the purpose that improves the sleeve pipe centering degree and reinforce the well cementation quality, is equipped with the chamber of righting of taking central through-hole at centralizer barrel inner wall promptly, rights the sealed cushion of intracavity wall connection, rights the intracavity and sets up the arm of righting, rights the arm tail end and wears out and right chamber central through-hole, and rights the arm tail end and be equipped with the pin. When the hydraulic centralizer enters a well, the centralizing arm is in a contraction state, the casing string is low in descending resistance, after the hydraulic centralizer is descended to a preset position, cement is replaced and then the casing string is pressed, and the pin is cut off by pressing in the casing, so that the centralizing arm is stressed and then outwards expanded to the wall of the centralizing casing, and the effect of improving the well cementation quality is achieved. The centralizer is provided with a plurality of centralizing arms, the centralizing action area is large, the thrust is strong, and the casing can be supported by smaller pressure, so that the centralizing action is realized. The expansion outer diameter of the centralizer can be larger than the inner diameter of the upper layer of casing, and the centralizer can also achieve the centralizing effect on irregular and expanded boreholes. The centralizing arm is likely to be inserted into the stratum after being expanded, and can also play a certain role in pipe fixing.
Description
Technical field
The utility model relates to a kind of hydraulic centralizing device, belongs to oil exploitation downhole tool technical field.
Background technology
In horizontal well and high angle hole, because Action of Gravity Field, sleeve pipe deflection well lower end so that sleeve pipe lower end cement sheath is very thin, even does not have cement sheath, causes this local cementing quality poor.In order to improve cementing quality, entering all to be set with centralizer on the sleeve pipe of well, yet, the external diameter of centralizer is certain, can't guarantee casing centralization for the irregular well of hole diameter, and is large at the frictional resistance of inclination section bunch tube and well, be lowered to difficulty, affect cementing operation.Although ball centralizer can transfer the sliding friction between sleeve pipe and the well to rolling friction, reduce the partial frictional resistance, because its external diameter is larger, still be difficult to deal with problems at all.
Summary of the invention
The purpose of this utility model is to provide a kind of hydraulic centralizing device, be a kind of enter well be easy to, can the Effective Raise drilling fluid and improve the hydraulic centralizing device of cementing quality.
Concrete technical scheme of the present utility model is as follows:
Be provided with radially lifter cavity at the cylinder inboard wall of hydraulic centralizing device, be provided with central through hole radially in the lifter cavity, the lifter cavity inwall connects seal gasket, be provided with righting arm in the lifter cavity, righting arm nose-circle side face suit O type circle, tail end passes the lifter cavity central through hole, and the righting arm tail end is provided with pin.
Righting arm was contraction state when the hydraulic centralizing device entered well, and hole diameter is less, and it is little that bunch tube is lowered to resistance.When centralizer down to the precalculated position, replace bruising behind the cement, the disconnected righting arm pin of crush-cutting makes the stressed backward external expansion of righting arm to the supporting positive cover tube wall in the sleeve pipe, reaches the effect that improves cementing quality.Centralizer is provided with a plurality of righting arms, and the centralizing function area is large, and thrust is strong, and less pressure just can hold up sleeve pipe, plays centralizing function.Centralizer expansion external diameter can greater than the internal diameter of last layer sleeve pipe, also can reach the effect of righting for the well of hole anomaly and hole enlargement.And possible insert into stratum after the righting arm expansion also plays certain solid pipe effect.
Description of drawings
Fig. 1 is hydraulic centralizing device structural representation.
Fig. 2 is structural representation after the expansion of hydraulic centralizing device righting arm.
The specific embodiment
With reference to Fig. 1 and 2 embodiment of the present utility model is further specified:
Embodiment:
On cylindrical shell 1 inwall of hydraulic centralizing device, evenly be provided with three groups of (two every group) lifter cavities radially, be provided with central through hole radially in the lifter cavity, the lifter cavity inwall connects seal gasket 3, be provided with righting arm 2 in the lifter cavity, righting arm 2 nose-circle side faces suit O type circle 4, tail end passes the lifter cavity central through hole, and righting arm 2 tops are provided with pin 5.
Claims (1)
1. hydraulic centralizing device is characterized in that:
Be provided with radially lifter cavity at cylindrical shell (1) inwall of hydraulic centralizing device, be provided with central through hole radially in the lifter cavity, the lifter cavity inwall connects seal gasket (3), be provided with righting arm (2) in the lifter cavity, righting arm (2) nose-circle side face suit O type circle (4), tail end passes the lifter cavity central through hole, and righting arm (2) tail end is provided with pin (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220337888 CN202745730U (en) | 2012-07-12 | 2012-07-12 | hydraulic centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220337888 CN202745730U (en) | 2012-07-12 | 2012-07-12 | hydraulic centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202745730U true CN202745730U (en) | 2013-02-20 |
Family
ID=47705147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220337888 Expired - Fee Related CN202745730U (en) | 2012-07-12 | 2012-07-12 | hydraulic centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202745730U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239933A (en) * | 2015-10-22 | 2016-01-13 | 中国石油天然气股份有限公司 | Hydraulic centralizer |
| CN107178320A (en) * | 2017-06-14 | 2017-09-19 | 中石化石油工程技术服务有限公司 | Hydraulic positioner |
-
2012
- 2012-07-12 CN CN 201220337888 patent/CN202745730U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239933A (en) * | 2015-10-22 | 2016-01-13 | 中国石油天然气股份有限公司 | Hydraulic centralizer |
| CN105239933B (en) * | 2015-10-22 | 2017-07-07 | 中国石油天然气股份有限公司 | Hydraulic centralizer |
| CN107178320A (en) * | 2017-06-14 | 2017-09-19 | 中石化石油工程技术服务有限公司 | Hydraulic positioner |
| CN107178320B (en) * | 2017-06-14 | 2023-09-08 | 中石化石油工程技术服务有限公司 | Hydraulic positioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20210712 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |