CN101144373A - Rolling wheel centralizer for gas drilling - Google Patents
Rolling wheel centralizer for gas drilling Download PDFInfo
- Publication number
- CN101144373A CN101144373A CNA2007100503015A CN200710050301A CN101144373A CN 101144373 A CN101144373 A CN 101144373A CN A2007100503015 A CNA2007100503015 A CN A2007100503015A CN 200710050301 A CN200710050301 A CN 200710050301A CN 101144373 A CN101144373 A CN 101144373A
- Authority
- CN
- China
- Prior art keywords
- roller
- centralizer
- guiding gutter
- rib
- rolling wheel
- 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.)
- Pending
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The invention relates to a roller centralizer used for gas drilling, and mainly comprises a centralizer main body, a special shape righting strip, a special shape guide groove, a roller, a roller shaft and a cover plate. The centralizer main body is provided with special shape righting strips which form a 90 degrees angle mutually, the lower part of the righting strip adopts a straight edge, the upper part adopts a shoe heel shape screw edge, the roller is arranged in the semicircle groove on the righting strip through an axle, and the axle is fixed with the cover plate. When the centralizer rotates, the roller rotates along the well wall, and the sliding friction is transformed into the rolling friction, and thereby the friction and the torque are reduced. Simultaneously the roller and the righting edge enable a drill string to be straightened and stabilized. The inlet opening of the guide groove adopts an open type wide inlet opening, ensuring that the fluid which arrives from all directions can enter into the guide groove smoothly, the width of a straight guide groove is reduced gradually, accelerating gas and rock debris particles, a screw narrow outlet opening leads the gas and rock debris particles to be accelerated again, and a high speed helical flow is formed at the outlet opening, and thereby the capability of the gas current to carry rocks is intensified.
Description
Technical field
A kind of gas drilling rolling wheel centralizer when the present invention relates in the oil gas field engineering, utilize gas as the circulatory mediator drilling well.
Background technology
Known at present, in the drilling well that utilizes gas for circulatory mediator,, usually need to become dissimilar bottomhole assemblies with bottomhole assembly, to reach the purpose of increasing hole angle, hold angle, drop angle with one or more centralizers for Controlling Borehole Trajectory.As pendulum assembly, packed hole assembly etc.In the present gas drilling, usually be that the centralizer that the liquid drilling well is used is directly used in the gas drilling.Because do not have the lubrication of drilling fluid during gas drilling in the pit shaft, the frictional resistance of the common centralizer and the borehole wall will increase greatly, moment of torsion also can increase, and causes centralizer short application life, drill string fatiguability damage etc.Because the large rock-carrying ability of gas is strong not as the large rock-carrying ability of liquid, common centralizer guiding gutter is even runner, or is vertical-type, or is screw type, and the landwaste handling capacity is poor, may cause taking rock and be obstructed.Therefore at the characteristics of gas drilling, developed a kind of gas drilling rolling wheel centralizer.
Goal of the invention
The objective of the invention is the technical problem that exists with common drilling tool centralizer in order to overcome in the above-mentioned gas drilling well.Based on drill string kinematics, sparse phase theory of gas-solid two-phase, frictional resistance theory, fluid numerical simulation technology, can reduce frictional resistance for gas drilling provides a kind of, reduce moment of torsion, can strengthen the gas large rock-carrying ability, stablize the special-purpose rolling wheel centralizer of drill string.
Technical scheme of the present invention
The present invention proposes a kind of gas drilling rolling wheel centralizer.Mainly by forming with the centralizer body of special righting strip, semicircle roller groove, the roller of being with tooth, roller shaft, back side wedge type cover plate etc.Centralizer body is a hollow cylinder, has four special shapes that are mutually 90 ° to set upright rib on cylinder.Setting upright the rib straightedge for widening gradually from the bottom up, up is heelpiece type scroll again, and helical angle is 25 °～30 °.Semicircle roller groove is opened and is being set upright on the rib straightedge section, and semicircle roller groove two has slot cover.Roller is installed on the roller shaft, and roller shaft two is pushed down by back side wedge type cover plate, and is screwed cover plate.
Because no drilling fluid lubricating effect in the gas drilling pit shaft, cause the increase of centralizer and borehole wall frictional resistance, rotation torque to increase, gas drilling rolling wheel centralizer of the present invention is connected on assigned address in the drill string according to the needs of drilling assembly, roller will roll along the borehole wall when centralizer body rotates, the sliding friction of setting upright the rib scraping borehole wall is converted into rolling friction between the roller and the borehole wall, reduced greatly the centralizer and the borehole wall frictional resistance, reduced rotation torque, prolonged the application life of lower drilling tool.
The roller of installing in the present invention is installed on the body through special construction by screw, only need more renew roller behind the rolling wheel wear, and body can continue to use, and helps reducing drilling cost.The present invention can use different rollers instead according to different stratum, and roller has three kinds of inserted type, the narrow flute profile of spiral and the wide flute profiles of spiral, and inserted type roller is applicable to that abrasive layer, narrow flute profile roller are applicable to that hard formation, wide flute profile are applicable to soft formation.
Two that the present invention sets upright rib is optimized to wedge shape, the frictional resistance when helping reducing to raise and decentralize drilling tool.Back reaming unfreezing when roller and wedge type righting strip head help carrying drilling tool and run into hole diameter and dwindle.The cover plate of wedge type shape can import the bulky grain landwaste roller tooth, the carbide alloy tooth on the roller can with the bulky grain landwaste once more crushing grinding become than the granule landwaste, carried away by air-flow then.Gas drilling rolling wheel centralizer of the present invention constantly changes and sets upright the prismatic shape by the fluid numerical simulation technology, the best guiding gutter of last optimization.The shape of guiding gutter inlet can guarantee that the landwaste that any direction and angle arrive all can enter guiding gutter.The guiding gutter bottom is the straight guiding gutter that width reduces gradually, i.e. the narrow export-oriented of wide portion, and top is the narrow outlet guiding gutter of special spiral.The straight guiding gutter of the wide portion of bottom helps gas, cutting grain and enters runner smoothly and be accelerated, and the narrow outlet of special spiral on top makes gas, landwaste quicken several times once more, and produces high-speed screw stream in outlet.The high-speed screw air-flow moves along the borehole wall, has strengthened the air-flow large rock-carrying ability.
Rolling wheel centralizer of the present invention set upright rib, roller can be set upright drill string, reduces or eliminates the off-centre of drill string, makes drill string and well coaxial, and can reduce problems such as drill string wearing and tearing and fatigue damage.Advantage of the present invention
Compared with prior art, righting strip on the rolling wheel centralizer of the present invention, cover plate, guiding gutter all have special shape, guiding gutter has wide straight channel and narrow helical flow path two parts, guiding gutter exports narrow runner makes fluid issuing produce high velocity, help strengthening straight well, horizontal well large rock-carrying ability, and routine techniques has only straight channel.These designs can set upright and stable drill string, reduce frictional resistance and rotation torque, strengthening flow large rock-carrying ability etc.
Description of drawings
Fig. 1 is the front view structure of rolling wheel centralizer of the present invention.
Fig. 2 is a rolling wheel centralizer lateral view of the present invention.
Fig. 3 is the adjacent righting strip expanded view of rolling wheel centralizer of the present invention.
Fig. 4 is the roller and the wheel shaft schematic diagram of rolling wheel centralizer of the present invention.
The specific embodiment
The rolling wheel centralizer embodiment that a kind of gas drilling of the present invention is used, as accompanying drawing 1, shown in Figure 2, set upright rib 2, directly set upright rib 3, wedge type cover plate 4, roller 5, wedge shape and set upright rib 6, guiding gutter inlet 7, guiding gutter outlet 8, roller groove 9, roller shaft 10 etc. and form by centralizer body 1, heelpiece type spiral.Article four, be mutually 90 ° directly set upright and have semi-circular roller groove 9 on the rib 3, roller 5 is enclosed within on the roller shaft 10, is installed in the roller groove 9.
Through the computational fluid dynamics numerical simulation, as accompanying drawing 1, shown in Figure 3, optimization the guiding gutter inlet 7 of special shape, guiding gutter outlet 8, near the fluid that any direction and any angle arrive all can be set upright rib 6 from wedge shape, the without hindrance guiding gutter wide portion 7 that enters, quicken through special straight channel, and enter narrower high-speed screw runner, strengthened the air-flow large rock-carrying ability.
It is characterized in that forming by wide straight channel guiding gutter 7 and narrow helical flow path guiding gutter 8 two parts.
As accompanying drawing 1, Fig. 2, shown in Figure 4, can change roller 5 on roller shaft 10 according to different stratum is inserted type, narrow flute profile and wide flute profile roller.Roller 5 rolls along the borehole wall in the drilling process, changes sliding friction into rolling friction, can reduce frictional resistance greatly, reduce rotation torque.In gas drilling, the riding position of rolling wheel centralizer of the present invention and number are united definite by drill string mechanics analysis and TRAJECTORY CONTROL.Cooperate the present invention to use, will rationally control rotating speed during gas drilling.To pay special attention to the coupling direction of this rolling wheel centralizer and drill string during use, import and export the correct cooperation of direction.
The present invention is used for the oilfield drilling engineering.
Claims (5)
1. gas drilling rolling wheel centralizer is set upright rib (2), is directly set upright rib (3), wedge shape cover plate (4), roller (5), wedge shape and set upright rib (6), guiding gutter inlet (7), guiding gutter outlet (8), roller groove (9), roller shaft (10) etc. and form by centralizer body (1), heelpiece type spiral.It is characterized in that each roller (5) of setting upright on the rib is enclosed within on the roller shaft (10), roller shaft (10) is installed in sets upright in the rib upper half-round slot (9) again, pass through screw by wedge shape cover plate (4); Described roller (5) can be changed different profiles of tooth.
2. according to the described rolling wheel centralizer of claim 1, it is characterized in that heelpiece type spiral is set upright rib (2) and directly set upright rib (3), guiding gutter inlet (7) and guiding gutter to export 25 °～30 ° of the special shape of (8) and helical angles.
3. according to claim 1 and 2 described rolling wheel centralizers, it is characterized in that having on the centralizer body 4 heelpiece type spirals that are mutually 90 degree special shapes to set upright rib (2) and directly set upright rib (3); Guiding gutter inlet (7) straight channel guiding gutter is a wide portion partly, and guiding gutter narrows down gradually then.Guiding gutter outlet (8) is the narrow outlet of helical form.
4. according to claim 2 and 3, directly setting upright the special half slot (9) that has installation roller (5) on the rib (3).
5. rolling wheel centralizer according to claim 1 is characterized in that wedge shape cover plate (4) is back side wedge shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100503015A CN101144373A (en) | 2007-10-19 | 2007-10-19 | Rolling wheel centralizer for gas drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100503015A CN101144373A (en) | 2007-10-19 | 2007-10-19 | Rolling wheel centralizer for gas drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101144373A true CN101144373A (en) | 2008-03-19 |
Family
ID=39207083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100503015A Pending CN101144373A (en) | 2007-10-19 | 2007-10-19 | Rolling wheel centralizer for gas drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101144373A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003151A (en) * | 2010-10-09 | 2011-04-06 | 西南石油大学 | Special stabilizer for gas drilling |
| CN102828698A (en) * | 2012-08-31 | 2012-12-19 | 山西环界石油钻具制造有限公司 | Three-slot drill column special for driving vehicle-mounted drilling machine |
| CN109441403A (en) * | 2018-11-23 | 2019-03-08 | 贵州高峰石油机械股份有限公司 | A kind of hydraulic casing pipeline scraper and pipe cleaning method |
| CN111774587A (en) * | 2020-07-29 | 2020-10-16 | 厦门理工学院 | Self-suction trepanning drill and using method thereof |
-
2007
- 2007-10-19 CN CNA2007100503015A patent/CN101144373A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003151A (en) * | 2010-10-09 | 2011-04-06 | 西南石油大学 | Special stabilizer for gas drilling |
| CN102828698A (en) * | 2012-08-31 | 2012-12-19 | 山西环界石油钻具制造有限公司 | Three-slot drill column special for driving vehicle-mounted drilling machine |
| CN102828698B (en) * | 2012-08-31 | 2015-09-23 | 山西环界石油钻具制造股份有限公司 | Be exclusively used in the three traverse drill posts that truck-mounted drilling rig drives |
| CN109441403A (en) * | 2018-11-23 | 2019-03-08 | 贵州高峰石油机械股份有限公司 | A kind of hydraulic casing pipeline scraper and pipe cleaning method |
| CN109441403B (en) * | 2018-11-23 | 2023-08-22 | 贵州高峰石油机械股份有限公司 | Hydraulic sleeve scraper and pipe scraping method |
| CN111774587A (en) * | 2020-07-29 | 2020-10-16 | 厦门理工学院 | Self-suction trepanning drill and using method thereof |
| CN111774587B (en) * | 2020-07-29 | 2021-07-23 | 厦门理工学院 | Self-suction trepanning drill and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7798258B2 (en) | Drill bit with cutter element having crossing chisel crests | |
| CN1755061B (en) | Roller cone drill bits with optimized bearing structure | |
| AU2013257758B2 (en) | A downhole assembly, tool and method | |
| CA2605196C (en) | Drag bits with dropping tendencies and methods for making the same | |
| US6173797B1 (en) | Rotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability | |
| US8505634B2 (en) | Earth-boring tools having differing cutting elements on a blade and related methods | |
| EP1841943B1 (en) | Roller reamer | |
| US8418785B2 (en) | Fixed cutter bit for directional drilling applications | |
| CN201738848U (en) | Wellbore cleaning tool used in well drilling | |
| CN201635674U (en) | Roller stabilizer for gas drilling | |
| US20080156543A1 (en) | Rock Bit and Inserts With a Chisel Crest Having a Broadened Region | |
| CN101144373A (en) | Rolling wheel centralizer for gas drilling | |
| CN108915615B (en) | A kind of auxiliary improves the drilling rod of Annular Cuttings degree of sorting | |
| US20170183912A1 (en) | Axis offset cam tool for reverse circulation exploration drilling systems and method of use thereof | |
| US9890597B2 (en) | Drill bits and tools for subterranean drilling including rubbing zones and related methods | |
| CN103775010B (en) | A kind of horizontal segment gas drilling hole cleaning instrument | |
| US8316968B2 (en) | Rolling cone drill bit having sharp cutting elements in a zone of interest | |
| US20150233186A1 (en) | Drill bit | |
| CN203531785U (en) | Centralizer using liquid to assist in cleaning cuttings bed | |
| CN1644870A (en) | Stabilizer of gas drill horizontal well | |
| US20160177630A1 (en) | Extended or raised nozzle for pdc bits | |
| CN108915620A (en) | Forward-reverse spiral blade combined type landwaste burnisher | |
| CN105863504A (en) | Friction-reducing, resistance-reducing, speed-improving and extending drilling method and tool based on secondary cutting crushing while drilling | |
| CN205477425U (en) | Wear -resisting chip removal drill collar | |
| US20130270010A1 (en) | Drill bits having depth of cut control features and methods of making and using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080319 |