CN2637702Y - Pressure difference type drilling micro underreamer - Google Patents
Pressure difference type drilling micro underreamer Download PDFInfo
- Publication number
- CN2637702Y CN2637702Y CN 03275780 CN03275780U CN2637702Y CN 2637702 Y CN2637702 Y CN 2637702Y CN 03275780 CN03275780 CN 03275780 CN 03275780 U CN03275780 U CN 03275780U CN 2637702 Y CN2637702 Y CN 2637702Y
- Authority
- CN
- China
- Prior art keywords
- water diversion
- forcing pipe
- diversion disk
- central tube
- blade
- 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 - Lifetime
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Abstract
The utility model relates to a pressure difference typed drill-following micro underreamer and is characterized in that an inclined diversion hole on a water diversion disk (2) is utilized to produce a mud pressure difference on a forcing pipe (6) after a mud pump is started, the pressure difference drives the forcing pipe (6) and a central pipe (8) to move downward; the inclined plane of a supporting shoe (12) fixed on the central pipe (8) is utilized to push a blade (10) of a micro underreamer to extend outward, the blade (10) is radially locked under the common effect of the supporting shoe (12) and a locating ring (7), and the blade (10) is provided with stable lateral pressure (namely, stable drill pressure) to cut the strata. The utility model has simple structure and the water diversion disk and the forcing pipe are utilized to realize the expansion of the blade after the mud pump is started, so the operation is convenient; a locking mechanism is designed to keep the working state of the cutting blade stable, which considerably improves the side cutting ability to the hard formation; the utility model can work with high reliability and the cut well bore and diameter are uniform and regular.
Description
Technical field
The utility model relate to oil-gas field development in the petroleum industry, the enlarging while drilling device that uses in the ore deposit probing, particularly a kind of differential with boring little reamer.
Background technology
Since nearly ten years,, the down-hole instrument has been had higher requirement, and the efficient down-hole instrument of development that develops into of novel hard material is laid a good foundation along with SLIM-HOLE DRILLING TECHNOLOGY and casing sidetracking broad application.Both at home and abroad each big downhole tool manufacturing company has all carried out correlative study, and has obtained some achievements.Developed diplocardia (off-centre) drill bit as Clayton Christensen company and in the peace 6 well slim-hole reamings of big section gypsic horizon in oil field, Tarim Basin and Xinjiang Oilfield are crept into, better used, reduced down hole problem, improved drilling well timeliness and cementing quality.But this drill bit in drilling process, mainly show as torque-on-bit big, sprain that it is serious to jump, drill bit and drill string have all been caused infringement in various degree; In addition because this drill bit pilot bit and reaming partly are integral structure, make drill bit poor to the adaptive capacity on stratum, the work stress of diplocardia drill bit has determined that the well that it gets out is the screw type well simultaneously, cause wellbore quality relatively poor, brought potential safety hazard and quality problems to follow-up work.Executed the spy in 1998 domestic hundred and developed and set upright reaming tool (joint), though the solution of the problems referred to above is had certain help, owing to still adopt monolateral cutting during reaming, instrument is subjected to force unbalance, therefore can not fundamentally address the above problem; SecurityDBS company had developed concentric telescopic reaming tool in 1999, can replace the diplocardia drill bit, the replacing drilling assembly need not to make a trip when enlarging well, it can directly be contained on the drill bit or any position of drilling assembly, both can be used for enlarging existing neck eye, also can when back reaming, enlarge open hole well.And can be with any model drill bit to go into well, can realize the symmetrical balance that reaming tool is stressed,, transmit moment of torsion stably for creeping into to reduce the vibration and the fatigue of Bottom Hole Assembly (BHA) (BHA) and other parts.This kind instrument has successively carried out ream operation on Norway, Holland, the U.S. and other places from 1999 to calendar year 2001, has obtained effect preferably.Realize the flexible of cutting element but the operating principle of this instrument is the inside and outside differential pressure of dependence instrument, and do not lock position-limit mechanism, therefore the unstable working condition of cutting wing is poor to the side cutting power than hard formation.
Summary of the invention
The purpose of this utility model is to provide a kind of differential enlarging while drilling device, solves that the reamer moment of torsion is big, working condition is unstable, to problems such as stratum adaptive capacity differences.
The utility model mainly is made up of body 1, central tube 8, wing 10, block 14, body lower contact 19 etc., be welded with PDC composite sheet 13 above the wing 10, link to each other with body by wing positioning bolt 9, it is characterized in that: water diversion disk 2, forcing pipe 6, locating ring 7 are housed in the body 1; Shear pin 3 is fixed on water diversion disk 2 on the body 1, has 6 and evenly distribute and axis and the angled oblique tap hole of water diversion disk axis in water diversion disk 2 center flow channels; Oblique tap hole faces the upper surface of forcing pipe 6, and forcing pipe 6 is matched in clearance with water diversion disk 2, forcing pipe 6 with locating ring 7; Forcing pipe 6 lower surfaces cooperate with central tube 8; Back-up block 12 is located by back-up block dog screw 11 with central tube 8; The lower end of central tube 8 is a spring support set 18, and spring support ring 21 utilizes the shear pin location with body lower contact 19, with spring support set 18 fixed reset springs 20.
The utility model is simple in structure, after utilizing the unlatching slush pump, water diversion disk cooperates with forcing pipe realizes opening of wing, easy to operate, and design has the locking position-limit mechanism to make the stable working state of cutting wing, reliable operation degree height, the well hole diameter rule that cuts have been improved to side cutting power greatly than hard formation.
Description of drawings
Fig. 1 is the utility model structural representation
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further auspicious stating.
The utility model mainly is made up of body 1, central tube 8, wing 10, block 14, body lower contact 19 etc., be welded with PDC composite sheet 13 above the wing 10, link to each other with body by wing positioning bolt 9, it is characterized in that: water diversion disk 2, forcing pipe 6, locating ring 7 are housed in the body 1; Shear pin 3 is fixed on water diversion disk 2 on the body 1, adopt the sealing of " O " RunddichtringO between water diversion disk and the body, " Yx " sealing ring 4 and " O " RunddichtringO 5 are housed on the forcing pipe 6, in water diversion disk 2 center flow channels, have 6 and evenly distribute and axis and the angled oblique tap hole of water diversion disk axis; Oblique tap hole faces the upper surface of forcing pipe 6, and forcing pipe 6 is matched in clearance with water diversion disk 2, forcing pipe 6 with locating ring 7; Locating ring and body fitting face adopt " Yx " sealing ring 4 and 5 sealings of " O " RunddichtringO, adopt 17 sealings of " O " RunddichtringO between locating ring and the forcing pipe; Forcing pipe 6 lower surfaces cooperate with central tube 8; Back-up block 12 is located by back-up block dog screw 11 with central tube 8; The lower end of central tube 8 is a spring support set 18, and spring support ring 21 utilizes the shear pin location with body lower contact 19, with spring support set 18 fixed reset springs 20; Sealing ring all is equipped with in central tube and body cooperation place.
Following mode can be taked with cooperating of central tube 8 in forcing pipe 6 lower surfaces: forcing pipe 6 lower end external surfaces are designed to the conical surface, and are complementary with central tube 8 upper end contact surfaces.
As further improvement of the utility model, the utility model also designs following structure: design has the Position Design of tap hole that the pitching conical surface is arranged in the water diversion disk 2.
Operating principle of the present utility model is as follows:
Be lowered to turn on pump after needs carry out the well section of ream operation with differential with boring little reamer, at this moment the oblique tap hole of water diversion disk 2 can produce mud pressure reduction on forcing pipe, driving forcing pipe 6 and central tube 8 moves down, utilization is fixed on back-up block 12 inclined-planes on the central tube 8, and to promote little expansion device wing 10 protruding, under the effect of back-up block 12 and locating ring 7, wing 10 is by locking radial, and provide stable lateral pressure (promptly stable the pressure of the drill) to cut the stratum to wing 10, the well hole diameter rule that realization cuts, the adaptive capacity of this reaming bit is improved, applicable to any stratum except that glutenite and vent breccia, improved drilling efficiency greatly; The downward thrust of considering one-level pressurization central tube possibly can't satisfy the effective cutting of wing to the stratum, can increase one or more levels forcing pipe 6, to guarantee effective work of little enlarging aiguille; When little enlarging aiguille need make a trip, only need termination of pumping, central tube 8 resets under the effect of back-moving spring 20, and little expansion device wing 10 is regained, and promptly is in the latus rectum state of higher level's well.And the variation that utilizes the change of water diversion disk 2 area of passages and cause pressure shows and the judgement instrument in the duty of down-hole.Under the situation that back-moving spring 20 can not reset central tube 8, by pitching, the pressure of spraining, central tube 8 runners are closed, cut off the fixing shear pin of water diversion disk 2, locating ring 7, spring support ring 18 and body 1 successively, it is descending that central tube 8 is continued, until the back-up block 12 descending wings of crossing below 10, wing 10 loses support, and wing 10 is recycled to normal condition.
Claims (3)
- One kind differential with boring little reamer, mainly form by body (1), central tube (8), wing (10), block (14), body lower contact (19) etc., be welded with PDC composite sheet (13) above the wing (10), link to each other with body by wing positioning bolt (9), it is characterized in that: water diversion disk (2), forcing pipe (6), locating ring (7) are housed in the body (1); Shear pin (3) is fixed on water diversion disk (2) on the body (1), has 6 and evenly distribute and axis and the angled oblique tap hole of water diversion disk axis in water diversion disk (2) center flow channels; Oblique tap hole faces the upper surface of forcing pipe (6), and forcing pipe (6) is matched in clearance with water diversion disk (2), forcing pipe (6) with locating ring (7); Forcing pipe (6) lower surface cooperates with central tube (8); Back-up block (12) is located by back-up block dog screw (11) with central tube (8); The lower end of central tube (8) is spring support set (18), and spring support ring (21) utilizes the shear pin location with body lower contact (19), with spring support set (18) fixed reset spring (20).
- 2. according to claim 1 differential it is characterized in that: forcing pipe (6) lower end external surface is designed to the conical surface with boring little reamer, and is complementary with central tube (8) upper end contact surface.
- 3. according to claim 1 or 2 described differential with boring little reamer, it is characterized in that: design has the Position Design of tap hole that the pitching conical surface is arranged in the water diversion disk (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03275780 CN2637702Y (en) | 2003-07-15 | 2003-07-15 | Pressure difference type drilling micro underreamer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03275780 CN2637702Y (en) | 2003-07-15 | 2003-07-15 | Pressure difference type drilling micro underreamer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2637702Y true CN2637702Y (en) | 2004-09-01 |
Family
ID=34302160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03275780 Expired - Lifetime CN2637702Y (en) | 2003-07-15 | 2003-07-15 | Pressure difference type drilling micro underreamer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2637702Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225736B (en) * | 2008-02-01 | 2011-05-25 | 西南石油大学 | Hydraulic double-acting drilling reamer |
| CN102373885A (en) * | 2010-08-10 | 2012-03-14 | 中国石油化工集团公司 | Power reamer while drilling for oil and gas well drilling |
| CN101644136B (en) * | 2008-08-06 | 2012-09-05 | 中国石油天然气集团公司 | Combination of reaming stabilizer and bottom drilling device |
| CN106285483A (en) * | 2016-10-10 | 2017-01-04 | 贵州高峰石油机械股份有限公司 | A kind of reducing reamer and reaming hole method thereof |
| CN111810069A (en) * | 2020-08-04 | 2020-10-23 | 西南石油大学 | Electric control type underground slurry diversion hydraulic power tool and method thereof |
| CN112252987A (en) * | 2020-10-22 | 2021-01-22 | 北京探矿工程研究所 | Drilling reamer and operation method thereof |
-
2003
- 2003-07-15 CN CN 03275780 patent/CN2637702Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225736B (en) * | 2008-02-01 | 2011-05-25 | 西南石油大学 | Hydraulic double-acting drilling reamer |
| CN101644136B (en) * | 2008-08-06 | 2012-09-05 | 中国石油天然气集团公司 | Combination of reaming stabilizer and bottom drilling device |
| CN102373885A (en) * | 2010-08-10 | 2012-03-14 | 中国石油化工集团公司 | Power reamer while drilling for oil and gas well drilling |
| CN102373885B (en) * | 2010-08-10 | 2013-10-30 | 中国石油化工集团公司 | Power reamer while drilling for oil and gas well drilling |
| CN106285483A (en) * | 2016-10-10 | 2017-01-04 | 贵州高峰石油机械股份有限公司 | A kind of reducing reamer and reaming hole method thereof |
| CN106285483B (en) * | 2016-10-10 | 2018-10-30 | 贵州高峰石油机械股份有限公司 | A kind of reducing reamer and its reaming hole method |
| CN111810069A (en) * | 2020-08-04 | 2020-10-23 | 西南石油大学 | Electric control type underground slurry diversion hydraulic power tool and method thereof |
| CN112252987A (en) * | 2020-10-22 | 2021-01-22 | 北京探矿工程研究所 | Drilling reamer and operation method thereof |
| CN112252987B (en) * | 2020-10-22 | 2022-09-27 | 北京探矿工程研究所 | Drilling reamer and operation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081212 Address after: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee after: Western Drilling Kelamayi Drilling Technology Institute Address before: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee before: Research Inst of Drilling Technology, Xinjiang Petroleum Administration |
|
| ASS | Succession or assignment of patent right |
Owner name: WEST DRILLING KARAMAY DRILLING CRAFT RESEARCH INST Free format text: FORMER OWNER: DRILLING WELL TECHNOLOGY INSTITUTE, PETROLEUM ADMINISTRATION BUREAU, XINJIANG Effective date: 20081212 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130715 Granted publication date: 20040901 |