CN101012736A - Slim-hole hydraulic controlled reducing reaming bit - Google Patents
Slim-hole hydraulic controlled reducing reaming bit Download PDFInfo
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- CN101012736A CN101012736A CN 200710003567 CN200710003567A CN101012736A CN 101012736 A CN101012736 A CN 101012736A CN 200710003567 CN200710003567 CN 200710003567 CN 200710003567 A CN200710003567 A CN 200710003567A CN 101012736 A CN101012736 A CN 101012736A
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- cutter hub
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- slim
- hole
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Abstract
The invention relates to a small-hole hydraulic controllable variable-diameter hole dilating drill with, mainly solving problems that the diameter keeping ability of variable-diameter drill is bad and it is difficult of draw the drill in body. it is characterized in that the upper end of pilot drill (1) is connected with the main body (2); on the water eye in pilot drill (1) a ball valve (3) is set; under the stage of valve bar (4) of ball valve (3) a connecting sleeve (5) with radius flow channel is mated; the upper end of connecting sleeve (5) is connected with the hollow piston (6) in the main body (2); a tool body (8) is set in oblique slide slots towards two sides in three long pores on the wall of main body (2); there is a water eye (9) at the position of piston (6) which is faced to the lower end of tool body (8); the tool body (8) is contacted with the piston (6). The hole dilating drill is provided with good diameter keeping ability, reliable retraction of tool body and long service life.
Description
Technical field:
The present invention relates to reaming bit used in the oil drilling field, especially slim-hole hydraulic controlled reducing reaming bit.
Background technology:
In the oil drilling field, old well heavily bores and comprises old well sidetracking and the intensification of old well, its objective is the development efficiency that improves old filed with lower cost of production.In sleeve pipe, carry out in the intensification of old well sidetracking and old well, significant for casing damaged well overhaul, deep layer oil and gas development.Distinct issues are that the producing well life-span is short in old well heavily bores, and the producing well life-span, short main cause was that cementing quality is poor, and that the main reason that influences cementing quality is a annular clearance between tail pipe and the well is little.Must reaming as increasing annular clearance.In the slim-hole ream operation, reaming bit is one of key equipment.Reaming bit mainly contains hydro powered plunger type reaming bit, waterpower and hinged cantilevered reaming bit and eccentric oversensitive reaming bit, and these reaming bits exist and protect the footpath poor performance, are difficult to be withdrawn into the problem that body of tool is interior, application life is short respectively.
Summary of the invention:
Protect the footpath poor performance, be difficult to be withdrawn into the deficiency in the body of tool in order to overcome existing reaming bit, the invention provides a kind of slim-hole hydraulic controlled reducing reaming bit, this reaming bit when operation, not only protect the footpath performance good, cutter hub withdrawal dependable performance, long service life, safe and reliable, and have the waterpower warning function, be convenient to operation, maintain characteristics easily.
Technical scheme of the present invention is: this slim-hole hydraulic controlled reducing reaming bit comprises pilot bit, the pilot bit upper end is connected with main body, there is ball valve at the hydrophthalmia seat of honour in the pilot bit, be covered with radially adapter sleeve under the valve rod step of ball valve with flow channels, the adapter sleeve upper end is connected with the interior hollow piston of main body, 3 interior two skew back chutes of strip hole are built-in with cutter hub on the main wall, with corresponding position, cutter hub lower end hydrophthalmia are arranged on the piston, and cutter hub contacts with piston.
Be connected with pushing block by screw on the cutter hub lower end piston in the such scheme, the interior upper end of strip hole is connected with limited block by screw on the main wall; The temporary lock shear pin that links to each other with cutter hub is arranged on the main body; Be filled with seal on the piston step of pressure cap lower end, be filled with seal on the piston step of adapter sleeve upper end.
The beneficial effect that the present invention has is: this slim-hole hydraulic controlled reducing reaming bit is owing to adopted such scheme, cutter hub is spacing owing to being subjected to the limited block strictness, the position at cutter hub place is not subjected to the influence of moment of torsion and the pressure of the drill, so this reaming bit has good guarantor footpath performance.Carry out the design principles of cloth tooth according to the broken rock dust of equal-volume, cutter hub adopts along the oblique chute of main body and moves and extend reaming, cutter hub length can the appropriateness increase, cutting teeth also can increase, the smear metal power that each smear metal tooth is born reduces, and each smear metal tooth institute is stressed evenly, thereby can improve the durability of smear metal tooth, also just prolongs the application life of this reaming bit.Again owing to improved the rigidity of cutter hub, it is little to produce plastic strain at identical smear metal power lower knife body, and cutter hub glides and retracts in the body of tool along the oblique chute of main body simultaneously, does not have drilling cuttings or rock piece clip cutter hub and can not be with the accident potential that be reduced in the body of tool.So cutter hub can safe and reliablely retract in the main body.This reaming bit utilizes the variation of pump pressure can determine fully that cutter hub opens fully, has realized the waterpower warning, is easy to differentiate.Because this reamer bit structure is simple, kinematic chain is short again, and easy accessibility is so maintaining is convenient.
Description of drawings:
Accompanying drawing 1 is a topology view of the present invention;
Accompanying drawing 2 is structure sectional views of cutter hub open mode of the present invention;
Accompanying drawing 3 is structure sectional views of cutter hub closed condition of the present invention.
1-pilot bit among the figure, the 2-main body, the 3-ball valve, the 4-valve rod, the 5-adapter sleeve, 6-piston, 7-are locked shear pin temporarily, 8-cutter hub, 9-hydrophthalmia, 10-limited block, 11-seal, 12-pushing block.
The specific embodiment:
Below in conjunction with accompanying drawing will the invention will be further described:
In conjunction with Fig. 2, shown in Figure 3, this slim-hole hydraulic controlled reducing reaming bit comprises pilot bit 1 by Fig. 1, and pilot bit 1 upper end is connected with main body 2, sets upright by pilot bit 1 centering; There is ball valve 3 at the seat of honour, water hole in the pilot bit 1, can control the switch of ball valve 3 by the increase and decrease pump pressure, the purpose of just realized also that cutter hub 8 is opened, withdrawal and waterpower being reported to the police; Be covered with radially adapter sleeve 5 under valve rod 4 steps of ball valve 3 with flow channels, adapter sleeve 5 upper ends are connected with main body 2 interior hollow pistons 6, by valve rod 4 and adapter sleeve 5 ball valve 3 and piston 6 are coupled together, after drilling fluid enters in the adapter sleeve 5 from the hollow passageway of piston 6, flow channels by adapter sleeve 5 enters in the pilot bit 1 again, promote to move on the piston 6, open cutter hub 8, drilling fluid is respectively from pilot bit 1 hydrophthalmia and hydrophthalmia 9 ejections; 3 interior two skew back chutes of strip hole are built-in with cutter hub 8 on main body 2 walls, by two skew back chutes in the strip hole cutter hub 8 and main body 2 are linked together, simultaneously because of tiltedly the chute upper end is outside, the lower end is inside, promotion cutter hub 8 at 6 times pushing blocks 12 of piston is tiltedly moving in the chute, cutter hub 8 was opened when piston 6 moved up, by on carry drilling tool and rely on borehole wall pressure or the pitching retraction cutter hub 8 that builds the pressure, thereby realized the purpose that cutter hub 8 is opened and regained; The temporary lock shear pin 7 that links to each other with cutter hub 8 is arranged on the main body 2, for preventing that cutter hub 8 from damaging sleeve pipe when transferring, this reaming bit temporarily is locked in cutter hub 8 on the main body 2 by temporary lock shear pin 7 before going into the well, when transferring to predetermined well section, be recycled to a fixed displacement and cut off temporary lock shear pin 7, cutter hub 8 is opened by pump; With corresponding position, cutter hub 8 lower end hydrophthalmia 9 is arranged on the piston 6, strengthen cutter hub 8 chip removals and cooling effect by hydrophthalmia 9; The pushing block 12 that is connected on cutter hub 8 and the piston 6 contacts, promptly promoting cutter hub 8 by the pushing block 12 under piston 6 connections moves up, place restrictions on cutter hub by the limited block 10 of upper end in the strip hole again and 8 surpass moving of scope, move in the scope that cutter hub 8 is designed in the two skew back chutes in strip hole, so just improved and protected the footpath performance; Be filled with seal 11 on piston 6 steps of pressure cap lower end, be filled with seal 11 on adapter sleeve 5 upper end pistons 6 steps,, guarantee the normal circulation of pump pressure by seal 11 enhanced leaktightness effects.
During actual the use, at first 3 cutter hubs 8 are bounced back in the strip hole of main body 2, with temporary lock shear pin 7 cutter hub 8 is locked, again this slim-hole hydraulic controlled reducing reaming bit is connected the drill collar lower end, again this reaming bit is arrived predetermined reaming well section place down, turn on pump is recycled to a fixed displacement and will locks shear pin 7 temporarily and cut off, drilling fluid passes through drilling rod, drill collar, piston 6 enters in the pilot bit 1, because of the hydrophthalmia of pilot bit 1 is closed by ball valve 3, hydrophthalmia 9 is opened, utilizing bit pressuredrop to promote piston 6 moves up, cutter hub 8 on main body 2 walls of the effect lower edge of piston 6 in the strip hole two skew back chutes move up, piston 6 arrives predetermined stroke, cutter hub 8 complete overhanging realization reaming work.Carry ball valve 3 on by adapter sleeve 5 and valve rod 4 when cutter hub 8 pistons 6 arrive predetermined stroke, 3 hydrophthalmias of pilot bit 1 are opened, 3 hydrophthalmias of pilot bit 1 are started working, and pump pressure can instantaneous bust, and report cutter hub 8 has been opened fully.Totally 6 hydrophthalmias of hydrophthalmia under this moment hydrophthalmia 9 and the pilot bit 1 is worked simultaneously, promptly by the pre-conditioned good hydrophthalmia state of 3 * φ, the 8 hydrophthalmia status transitions before opening after open.After reaming work was finished, termination of pumping, back reaming slided cutter hub 8 by the pressure between cutter hub 8 and the borehole wall and to move along the inclined-plane, and cutter hub 8 retracts in the main body 2, but made the cutter hub retraction after also utilizing hydraulic action to make descent of piston after the pitching.This slim-hole hydraulic controlled reducing reaming bit simple and ingenious structure, similar drill bit with other relatively have protect that the footpath is effective, the cutter hub contracting property reliable, waterpower is reported to the police after the hole enlargement fully characteristics, can be according to Different Strata tool changing piece more, the water nozzle of pilot bit also can be according to different technological requirement transposings.This drill bit can heavily bore and old well is used in deepening at old well, can make the old well of stopping production resume production again, full of vitality, have tangible economic and social benefit, have good promotion prospect.
In sum, this slim-hole hydraulic controlled reducing reaming bit not only has good guarantor footpath effect, long working life, contracting property reliably, characteristics such as waterpower is reported to the police, and is easy to differentiate, and is convenient to operation, and maintaining is convenient.And rock breaking capacity is stronger, and the cleaning and the cooling effect of smear metal tooth are good.
Claims (4)
1, a kind of slim-hole hydraulic controlled reducing reaming bit, comprise pilot bit (1), it is characterized in that: pilot bit (1) upper end is connected with main body (2), there is ball valve (3) at the interior hydrophthalmia of pilot bit (1) seat of honour, be covered with radially adapter sleeve (5) under valve rod (4) step of ball valve (3) with flow channels, adapter sleeve (5) upper end is connected with the interior hollow piston (6) of main body (2), 3 interior two skew back chutes of strip hole are built-in with cutter hub (8) on main body (2) wall, piston (6) is gone up and there is hydrophthalmia (9) cutter hub (8) corresponding position, lower end, and cutter hub (8) contacts with piston (6).
2, slim-hole hydraulic controlled reducing reaming bit according to claim 1, it is characterized in that: cutter hub (8) lower end piston (6) is gone up and is connected with pushing block (12) by screw, and the interior upper end of strip hole is connected with limited block (10) by screw on main body (2) wall.
3, slim-hole hydraulic controlled reducing reaming bit according to claim 1 is characterized in that: the temporary lock shear pin (7) that links to each other with cutter hub (8) is arranged on the main body (2).
4, slim-hole hydraulic controlled reducing reaming bit according to claim 1 is characterized in that: be filled with seal (11) on pressure cap lower end piston (6) step, be filled with seal (11) on piston (6) step of adapter sleeve (5) upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100035674A CN100516449C (en) | 2007-02-08 | 2007-02-08 | Slim-hole hydraulic controlled reducing reaming bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100035674A CN100516449C (en) | 2007-02-08 | 2007-02-08 | Slim-hole hydraulic controlled reducing reaming bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101012736A true CN101012736A (en) | 2007-08-08 |
| CN100516449C CN100516449C (en) | 2009-07-22 |
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ID=38700442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100035674A Expired - Fee Related CN100516449C (en) | 2007-02-08 | 2007-02-08 | Slim-hole hydraulic controlled reducing reaming bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100516449C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155164A (en) * | 2011-02-24 | 2011-08-17 | 平顶山五环实业有限公司 | Thrust auxiliary reamer bit |
| CN103748308A (en) * | 2011-04-08 | 2014-04-23 | 3C雷莫斯有限责任公司 | Method and apparatus for reaming well bore surfaces nearer the center of drift |
| CN105201408A (en) * | 2015-09-06 | 2015-12-30 | 中国石油天然气集团公司 | Near-bit reamer |
| CN107083923A (en) * | 2017-06-20 | 2017-08-22 | 西南石油大学 | Controllable diameter changeable borehole-enlarging drilling tool |
| CN107165606A (en) * | 2017-06-26 | 2017-09-15 | 中国石油集团渤海钻探工程有限公司 | Upper strata high pressure negative pressure point device for picking |
| CN108222836A (en) * | 2018-01-03 | 2018-06-29 | 西南石油大学 | A kind of two-way reaming hole drilling tool |
| CN108756753A (en) * | 2018-07-23 | 2018-11-06 | 长江大学 | A kind of drilling underreaming device that can be stretched repeatedly |
| CN112459739A (en) * | 2020-12-16 | 2021-03-09 | 南智（重庆）能源技术有限公司 | Variable-diameter drilling and milling device for oil and gas well |
| CN113404423A (en) * | 2021-08-20 | 2021-09-17 | 四川深远石油钻井工具股份有限公司 | Anti-sticking structure and anti-sticking drilling tool with same |
| CN114352207A (en) * | 2021-11-30 | 2022-04-15 | 中国矿业大学 | Hydraulic transmission type variable-diameter PDC drill bit |
-
2007
- 2007-02-08 CN CNB2007100035674A patent/CN100516449C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155164A (en) * | 2011-02-24 | 2011-08-17 | 平顶山五环实业有限公司 | Thrust auxiliary reamer bit |
| CN102155164B (en) * | 2011-02-24 | 2013-06-05 | 平顶山五环实业有限公司 | Thrust auxiliary reamer bit |
| CN103748308A (en) * | 2011-04-08 | 2014-04-23 | 3C雷莫斯有限责任公司 | Method and apparatus for reaming well bore surfaces nearer the center of drift |
| CN105201408A (en) * | 2015-09-06 | 2015-12-30 | 中国石油天然气集团公司 | Near-bit reamer |
| CN105201408B (en) * | 2015-09-06 | 2017-09-01 | 中国石油天然气集团公司 | A kind of nearly drill bit reamer |
| CN107083923A (en) * | 2017-06-20 | 2017-08-22 | 西南石油大学 | Controllable diameter changeable borehole-enlarging drilling tool |
| CN107165606A (en) * | 2017-06-26 | 2017-09-15 | 中国石油集团渤海钻探工程有限公司 | Upper strata high pressure negative pressure point device for picking |
| CN107165606B (en) * | 2017-06-26 | 2023-07-21 | 中国石油天然气集团有限公司 | High-pressure negative-pressure separate mining device on upper layer |
| CN108222836A (en) * | 2018-01-03 | 2018-06-29 | 西南石油大学 | A kind of two-way reaming hole drilling tool |
| CN108756753A (en) * | 2018-07-23 | 2018-11-06 | 长江大学 | A kind of drilling underreaming device that can be stretched repeatedly |
| CN112459739A (en) * | 2020-12-16 | 2021-03-09 | 南智（重庆）能源技术有限公司 | Variable-diameter drilling and milling device for oil and gas well |
| CN113404423A (en) * | 2021-08-20 | 2021-09-17 | 四川深远石油钻井工具股份有限公司 | Anti-sticking structure and anti-sticking drilling tool with same |
| CN114352207A (en) * | 2021-11-30 | 2022-04-15 | 中国矿业大学 | Hydraulic transmission type variable-diameter PDC drill bit |
| CN114352207B (en) * | 2021-11-30 | 2024-03-22 | 中国矿业大学 | Hydraulic transmission type diameter-variable PDC drill bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100516449C (en) | 2009-07-22 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20110208 |