CN203640627U - Hydraulic bushing centralizer - Google Patents
Hydraulic bushing centralizer Download PDFInfo
- Publication number
- CN203640627U CN203640627U CN201320804720.4U CN201320804720U CN203640627U CN 203640627 U CN203640627 U CN 203640627U CN 201320804720 U CN201320804720 U CN 201320804720U CN 203640627 U CN203640627 U CN 203640627U
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- CN
- China
- Prior art keywords
- central tube
- piston
- righting arm
- bushing
- righting
- 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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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a hydraulic bushing centralizer which comprises a central tube, a centralizing arm and a drive device. The upper end of the central tube is connected to the lower-end inner wall of an upper connector, the lower end of the central tube is connected to the upper-end inner wall of a lower connector, the centralizing arm is arranged outside the central tube, and the drive device arranged outside the central tube and used for compressing the centralizing arm downwardly is arranged above the centralizing arm. The drive device comprises a piston, a piston bushing sleeves the outside of the central tube, the upper end of the piston bushing is connected to the lower-end outer wall of the upper connector, an annual hollow type piston cavity is formed between the piston bushing and the central tube, the piston is arranged in the piston cavity, the lower end of the piston bushing is connected with a fixing piece, and the lower end of the piston is fixed on the temporarily fixing piece through a shear pin. The hydraulic bushing centralizer serves as a complete well tube string to partially enter a well, when a certain pressure reaches during well cementing and pressure touching, the shear pin is cut through, the centralizing arm is pushed out to support the side wall of the open well, the bushing is ensured to be centered, and finally cement sheathes even in thickness are formed in gaps between the bushing and the open well.
Description
Technical field
The utility model relates to oil drilling completion casing stabbing board, particularly a kind of hydraulic casing pipe centering device, is applied on high-inclination directional well, horizontal well completion sleeve pipe tubing string, and while making well drilling and cementing operation, sleeve pipe is placed in the middle better in down-hole, to improve cementing quality.
Background technology
In the well cementing operation of oil field high-inclination directional well, horizontal well, for make casing string in pit shaft between two parties to improve cementing quality, the Main Means using is at present that elastic centralizer or rigid centralizer are installed on casing string.Elastic centralizer is due to insufficient rigidity, and casing string often lies in the borehole wall one side in down-hole, and rigidity centralizer is because diameter can often be hampered too greatly in setting of casing process, and these two kinds of centralizers can not meet on-the-spot application demand completely.Patent Office of the People's Republic of China announced on March 4th, 2009 applying date be on June 17th, 2008 application number be that 200820038174.X name is called the utility model of " self-locking type hydraulic casing tube centralizer ", this utility model is by adopting the mode of hydraulic pressure, the ability of righting of the spring leaf of elastic centralizer is greatly strengthened, thereby can make better sleeve pipe placed in the middle in pit shaft.In order to guarantee no longer to regain after spring leaf overhangs, this utility model has adopted steel ball to add the locking mode on inclined-plane.When this locking mode is applied in horizontal well, in the time that steel ball is clung by greasy dirt or mud etc., thereby just may not can roll locking pressurization fluid cylinder and spring leaf along inclined-plane, at this moment self-locking type hydraulic casing tube centralizer just can not righting sleeve pipe.
Summary of the invention
The purpose of this utility model is to provide sleeve hydraulic centralizer, solves the ropy defect of horizontal cementing in prior art.
In order to reach above-mentioned purpose, the utility model has adopted following technical scheme, sleeve hydraulic centralizer, comprise central tube, righting arm, drive unit, described central tube upper end is connected to top connection lower end inwall, central tube lower end is connected to lower contact upper end inwall, described central tube arranged outside righting arm, described righting arm lower end is fixed on lower contact outside, upper end is connected with central tube outer wall slidingtype, and described righting arm top is provided with and is arranged on being equally used for to the drive unit of lower compression righting arm of central tube outside.
Described drive unit comprises piston, Hydraulic Station, control device, Hydraulic Station, control device on described piston connecting well, described central tube outside cover has piston bush, piston bush upper end is connected to top connection lower end outer wall, between piston bush and central tube, form annular space formula plunger shaft, described piston is placed in plunger shaft, piston bush lower end connection fixture, and described piston lower end is temporarily fixed on fixture by shear pin.
Described righting arm upper end is recovered in upper righting arm seat, and at upper righting arm seat arranged outside slip ring, described slip ring drives righting arm upper end to lower compression, righting arm outwards to be opened by the pressure of top drive unit.
Described righting arm lower end is recovered in lower righting arm seat.
Described lower righting arm seat is fixed in lower contact by sheath.
Compared to prior art, the utlity model has following beneficial effect:
The utility model, as in completion tubular column part lower going-into-well, in the time reaching certain pressure, is cut off shear pin when well cementing impact pressure, righting arm is released, be supported on the bore hole borehole wall, guarantee that sleeve pipe is placed in the middle in well, finally form the cement sheath of even thickness in the gap of sleeve pipe and bore hole.
Accompanying drawing explanation
Fig. 1 is the structural representation of sleeve hydraulic centralizer of the present utility model;
Fig. 2 is the partial enlarged drawing of Fig. 1.
In figure: top connection 1, piston bush 2, sealing ring 3, piston 4, central tube 5, fixture 6, shear pin 7, slip ring 8, upper righting arm seat 9, righting arm 10, lower righting arm seat 11, sheath 12, lower contact 13.
The specific embodiment
Relevant detailed description of the present utility model and technology contents, coordinate accompanying drawing to be described as follows, but accompanying drawing only provides the use of reference with explanation, is not used for the utility model to be limited.
As shown in Figure 1-2, sleeve hydraulic centralizer, comprise central tube 5, righting arm 10, drive unit, described central tube upper end is connected to top connection 1 lower end inwall, central tube lower end is connected to lower contact 13 upper end inwalls, described central tube arranged outside righting arm, and described righting arm lower end is fixed on lower contact outside, upper end is connected with central tube outer wall slidingtype, and described righting arm top is provided with and is arranged on being equally used for to the drive unit of lower compression righting arm of central tube outside.Described drive unit comprises piston 4, Hydraulic Station, control device, Hydraulic Station, control device on described piston connecting well, described central tube outside cover has piston bush 2, piston bush upper end is connected to top connection lower end outer wall, between piston bush and central tube, form annular space formula plunger shaft, described piston is placed in plunger shaft, piston bush lower end connection fixture 6, and described piston lower end is temporarily fixed on fixture by shear pin 7.
Described righting arm upper end is recovered in upper righting arm seat 9, and at upper righting arm seat arranged outside slip ring 8, described slip ring drives righting arm upper end to lower compression, righting arm outwards to be opened by the pressure of top drive unit.Described righting arm lower end is recovered in lower righting arm seat 11.Described lower righting arm seat is fixed in lower contact by sheath 12.
Go into the well in process, upper lower contact splicing sleeve, righting arm is in recovery state, when well cementing impact pressure, in the time that pressure in sleeve pipe reaches 12 ~ 14MPa, hydraulic drive piston 4 moves down, and cuts off shear pin 7, promotes slip ring 8 and moves down, slip ring 8 promotes upper righting arm seat 9 and moves down, because lower righting arm seat 11 is fixing, institute's above righting arm seat extruding righting arm opens, and is supported on the bore hole borehole wall.Guarantee that two sections of sleeve pipes of hydraulic centralizing device are placed in the middle in bore hole well.
The foregoing is only preferred embodiment of the present utility model, non-in order to limit the scope of the claims of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should all belong to the scope of the claims of the present utility model.
Claims (5)
1. sleeve hydraulic centralizer, it is characterized in that, comprise central tube, righting arm, drive unit, described central tube upper end is connected to top connection lower end inwall, central tube lower end is connected to lower contact upper end inwall, described central tube arranged outside righting arm, and described righting arm lower end is fixed on lower contact outside, upper end is connected with central tube outer wall slidingtype, and described righting arm top is provided with and is arranged on being equally used for to the drive unit of lower compression righting arm of central tube outside.
2. sleeve hydraulic centralizer according to claim 1, it is characterized in that, described drive unit comprises piston, Hydraulic Station, control device, Hydraulic Station, control device on described piston connecting well, described central tube outside cover has piston bush, piston bush upper end to be connected to top connection lower end outer wall, between piston bush and central tube, form annular space formula plunger shaft, described piston is placed in plunger shaft, piston bush lower end connection fixture, and described piston lower end is temporarily fixed on fixture by shear pin.
3. sleeve hydraulic centralizer according to claim 1, it is characterized in that, described righting arm upper end is recovered in upper righting arm seat, at upper righting arm seat arranged outside slip ring, described slip ring drives righting arm upper end to lower compression, righting arm outwards to be opened by the pressure of top drive unit.
4. sleeve hydraulic centralizer according to claim 3, is characterized in that, described righting arm lower end is recovered in lower righting arm seat.
5. sleeve hydraulic centralizer according to claim 4, is characterized in that, described lower righting arm seat is fixed in lower contact by sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320804720.4U CN203640627U (en) | 2013-12-10 | 2013-12-10 | Hydraulic bushing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320804720.4U CN203640627U (en) | 2013-12-10 | 2013-12-10 | Hydraulic bushing centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203640627U true CN203640627U (en) | 2014-06-11 |
Family
ID=50871882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320804720.4U Expired - Fee Related CN203640627U (en) | 2013-12-10 | 2013-12-10 | Hydraulic bushing centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203640627U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314498A (en) * | 2014-08-18 | 2015-01-28 | 中国石油集团长城钻探工程有限公司 | Efficient well completion method for sidetrack horizontal well |
| CN109899006A (en) * | 2017-12-08 | 2019-06-18 | 陈晓新 | A kind of new casing tail pipe metallic elastic deformation suspending apparatus |
-
2013
- 2013-12-10 CN CN201320804720.4U patent/CN203640627U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314498A (en) * | 2014-08-18 | 2015-01-28 | 中国石油集团长城钻探工程有限公司 | Efficient well completion method for sidetrack horizontal well |
| CN109899006A (en) * | 2017-12-08 | 2019-06-18 | 陈晓新 | A kind of new casing tail pipe metallic elastic deformation suspending apparatus |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140611 Termination date: 20171210 |