CN2175824Y - Rigid swiral centralising device - Google Patents
Rigid swiral centralising device Download PDFInfo
- Publication number
- CN2175824Y CN2175824Y CN 93245878 CN93245878U CN2175824Y CN 2175824 Y CN2175824 Y CN 2175824Y CN 93245878 CN93245878 CN 93245878 CN 93245878 U CN93245878 U CN 93245878U CN 2175824 Y CN2175824 Y CN 2175824Y
- Authority
- CN
- China
- Prior art keywords
- well
- rigid
- centralizing
- rigidity
- righting strip
- 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
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a rigid swirl centralizing device used for the well fixation of a horizontal well and a directional well. The rigid swirl centralizing device used for the well fixation of a horizontal well and a directional well is composed of a column lining (1) and a centralizing strip (2). The rigid swirl centralizing device used for the well fixation of a horizontal well and a directional well is characterized in that the column lining (1) and the centralizing strip (2) are in rigid connection. The centralizing strip (2) is in a spiral structure on the column lining (1) to form a spiral flow channel. The rigid swirl centralizing device used for the well fixation of a horizontal well and a directional well has a rigid centralizing function, and the rigid swirl centralizing device used for the well fixation of a horizontal well and a directional well can generate a ring direction velocity field. The carrying capability of fluid is enlarged, and the displacing efficiency of cement filling is enhanced.
Description
The utility model relates to a kind of centralizer that is used for oil drilling well cementation usefulness, the centralizer of using especially for directional well and horizontal cementing.
In the prior art, have centralizing function and the only flexible eddy flow centralizer of centralizer that improves ring empty flow field simultaneously.This centralizer is to install several inclination steel blades with certain geometrical shape and size additional to form on the basis of common arc elastic centralizer, fixes with rivet between blade and the common arc elastic centralizer.When in directional well and horizontal cementing, using this class centralizer, because the angle of hole deviation is bigger, the lateral force that the sleeve pipe deadweight produces is bigger, elasticity eddy flow centralizer is difficult to set upright sleeve pipe, its arcuate bombing leaf often is driven plain, the gap smaller of the sleeve pipe and the pit shaft downside borehole wall, even sleeve body is being pasted the downside borehole wall, cause the frictional force between the sleeve pipe and the borehole wall to increase, be lowered to difficulty.In the cementing displacement process, the downside borehole wall is narrow, and the mud of annular space and silt particle are difficult to be replaced by cement paste.
The purpose of this utility model provides a kind of rigidity eddy flow centralizer, and this centralizer can produce the rigidity centralizing function to sleeve pipe, thereby good annular space runner is provided.
The utility model is made up of cylinder lining (1) and righting strip (2), and for being rigidly connected, righting strip (2) structure twist on cylinder lining (1) forms helical flow path between righting strip (2) and the cylinder lining (1).
Advantage of the present utility model is: 1, rigidity eddy flow centralizer has the rigidity centralizing function, and it is little to be lowered to resistance; 2, in the cementing displacement process, annular space straight line fluid is risen (or advancing) and generation hoop velocity field through the helical flow path eddy flow.The hoop velocity field forms new runner in annular space, fluid is evenly risen (or advancing), and principal flow velocity and borehole wall place flow velocity are improved, thereby has strengthened the carrying capacity of fluid.Simultaneously, hoop flow velocity another arena has increased additional pressure and shearing stress to the borehole wall, is easy to wash away, peel off and gets rid of mud, mud cake and sand setting on the borehole wall (the especially pit shaft downside borehole wall) face, helps to improve the cementing displacement efficiency; 3, simple in structure, the handling ease of the utility model.
Fig. 1 is the utility model front view;
Fig. 2 is the utility model vertical view.
The utility model is further specified as follows below in conjunction with drawings and Examples:
As depicted in figs. 1 and 2, the utility model is made up of cylinder lining (1) and righting strip (2), and for being rigidly connected, righting strip (2) structure twist on cylinder lining (1) forms spiral flow channel between righting strip (2) and the cylinder lining (1).As shown in Figure 1, in order to reduce the frictional force between the centralizer and the borehole wall, the profile of rigidity eddy flow centralizer is designed to cydariform.Righting strip (2) on the cylinder lining (1) be 3 to 6 uniform.Righting strip (2) is gone up at cylinder lining (1) and is become 30 ° to 50 ° angle with its axis, and wherein 37 ° is best.As shown in Figure 2, to 6mm, the internal diameter of cylinder lining (1) is compared respective sleeve external diameter big 2 to 3mm to the maximum outside diameter Dmax of rigidity eddy flow centralizer than corresponding borehole diameter (bit diameter) little 3.In order to guarantee the bonding strength between cylinder lining (1) and the righting strip (2), cylinder lining (1) and righting strip (2) can adopt integrated poured.
Claims (6)
1, a kind of rigidity eddy flow centralizer that is used for horizontal well and directional well well cementation, form by cylinder lining (1) and righting strip (2), it is characterized in that between cylinder lining (1) and the righting strip (2) that for being rigidly connected righting strip (2) structure twist on cylinder lining (1) forms helical flow path.
2, rigidity eddy flow centralizer according to claim 1 is characterized in that described centralizer profile is a cydariform.
3, rigidity eddy flow centralizer according to claim 1, it is characterized in that described righting strip (2) be 3 to 6 uniform.
4, rigidity eddy flow centralizer according to claim 1 is characterized in that described righting strip (2) upward becomes 30 ° to 50 ° angle with its axis at cylinder lining (1).
5, rigidity eddy flow centralizer according to claim 4 is characterized in that on described righting strip (2) and the cylinder reality cover (1) and the angle between its axis is 37 °.
6, rigidity eddy flow centralizer according to claim 1 is characterized in that cylinder lining (1) adopts integrated poured the connection with righting strip (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93245878 CN2175824Y (en) | 1993-11-26 | 1993-11-26 | Rigid swiral centralising device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93245878 CN2175824Y (en) | 1993-11-26 | 1993-11-26 | Rigid swiral centralising device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2175824Y true CN2175824Y (en) | 1994-08-31 |
Family
ID=33818703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93245878 Expired - Fee Related CN2175824Y (en) | 1993-11-26 | 1993-11-26 | Rigid swiral centralising device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2175824Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168533A (en) * | 2011-03-16 | 2011-08-31 | 中煤科工集团西安研究院 | Central support for inserting geological drilling casing |
| CN102434115A (en) * | 2011-11-28 | 2012-05-02 | 西南石油大学 | Strong rotational flow sleeve centralizer |
| CN106050165A (en) * | 2016-08-22 | 2016-10-26 | 刘明晓 | Rigid centralizer |
| CN109356529A (en) * | 2018-12-12 | 2019-02-19 | 林林 | It is a kind of to cross size mud cake removal device and its production technology |
-
1993
- 1993-11-26 CN CN 93245878 patent/CN2175824Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168533A (en) * | 2011-03-16 | 2011-08-31 | 中煤科工集团西安研究院 | Central support for inserting geological drilling casing |
| CN102168533B (en) * | 2011-03-16 | 2013-06-05 | 中煤科工集团西安研究院 | Central support for inserting geological drilling casing |
| CN102434115A (en) * | 2011-11-28 | 2012-05-02 | 西南石油大学 | Strong rotational flow sleeve centralizer |
| CN106050165A (en) * | 2016-08-22 | 2016-10-26 | 刘明晓 | Rigid centralizer |
| CN109356529A (en) * | 2018-12-12 | 2019-02-19 | 林林 | It is a kind of to cross size mud cake removal device and its production technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207245619U (en) | A kind of hydroscillator | |
| CN103174380A (en) | Spring energy-storage inspiring type rotary percussive drill device | |
| CN2175824Y (en) | Rigid swiral centralising device | |
| CN2693945Y (en) | Hydraulic pulse vibrator | |
| CN112081528A (en) | Horizontal section efficient support-free oscillating drilling tool combination and method | |
| CN2479202Y (en) | Super-long stroke downhole bailing device | |
| CN208221051U (en) | Sand control pump and sand control tubular column | |
| CN216381276U (en) | Drilling tool for reducing bottom hole pressure | |
| CN108612480A (en) | A kind of vortex pulse shock drill bit | |
| CN211173974U (en) | Gas extraction drill rod joint and drilling tool with enhanced slag discharge function | |
| CN113006680B (en) | Low-pressure-loss torsion impact drilling tool and rock breaking method | |
| CN2406060Y (en) | Liquid whild-wind generator | |
| CN2173871Y (en) | Bidirectional symmetrical single-screw oil pump | |
| CN2736521Y (en) | Multifunctional casing centralizing turbulator | |
| CN2325506Y (en) | Sucker rod stabilizer to prevent it from being eccentrically worn | |
| CN2378530Y (en) | Nylon centralising coupling for sucker rod | |
| CN101514613A (en) | Extension hanger | |
| CN200999589Y (en) | Cast iron core type casing tube drill | |
| CN2326724Y (en) | Oil-well casing-pipe righting and spiral-flow generating apparatus | |
| CN215718562U (en) | Drilling fluid elevated tank device for offshore drilling platform | |
| CN217686900U (en) | Open-air mud deep water big gun hole prevents suspension loaded constitution | |
| CN202510085U (en) | Well cementation device used for improving cement slurry displacement efficiency | |
| CN213510487U (en) | Elastic centralizer | |
| CN2584803Y (en) | Spiral-flow slip casting bend joint | |
| CN104358550B (en) | Clamping mechanism of large-diameter restrictor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |