CN103046871B - Hydra-mechanical reducing bit broaching while drilling - Google Patents
Hydra-mechanical reducing bit broaching while drilling Download PDFInfo
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- CN103046871B CN103046871B CN201210583953.6A CN201210583953A CN103046871B CN 103046871 B CN103046871 B CN 103046871B CN 201210583953 A CN201210583953 A CN 201210583953A CN 103046871 B CN103046871 B CN 103046871B
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Abstract
The invention relates to a drilling tool, in particular to a hydra-mechanical reducing bit broaching while drilling. The hydra-mechanical reducing bit broaching while drilling is capable of continuously caving in coal beds after a drilling-in process and in a bit withdrawal process, and comprises an upper connector, a shell, a core pipe, a mandrel, a bit, a piston system, a drilling fluid flowing direction converting system and a cone arm assembly broaching while drilling. The hydra-mechanical reducing broaching bit while drilling is reasonable to design and is capable of achieving the same functions of a normal bit in the drilling-in process and enabling a cone arm to stretch under the action of the piston system, the drilling fluid flowing direction converting system and the cone arm assembly broaching while drilling during bit withdrawal, so that a broaching and caving process is achieved.
Description
Technical field
The present invention relates to a kind of drilling tool, be specially a kind of Hydromechanical drilling reducing reaming bit.
Background technology
Down-hole drilling extraction coal bed gas is one of control of coalmine gas and the major measure eliminating coal and gas prominent, reduces coal seam gas-bearing capacity by extraction, reduces tunnel and digs well and gas emission during stope back production, reduce the danger of coal and gas prominent.Underground coal mine increases the method for coal-bed gas extract mainly by increasing drill hole density, reduces the spacing of wells, as adopted intensive boring; Or change coal bed drilling arrangement, as changed cross borehole into by horizontal bore; Or increase extraction bore diameter; Or the method increasing drilling-draining negative pressure improves coal bed drilling gas drainage amount, its shortcoming is the increase in construction volume and the drill footage amount of boring, and expense increases.Find in practice, because coal seam permeability is poor, crack agensis, directly carries out hole pumping and mining in down-hole, and because boring aperture is less, influence basin is limited, and the speed of gas Spontaneous release and output results are all poor, and extracting result sometimes and not obvious.So those skilled in the art have developed again the technology in Zhong Zao cave, coal seam, amassing by making cave expansion uncovering coal plane, increasing cracks in coal seam, thus coal bed gas spill-out is increased.In the process of moving back brill, also can realize the function making cave continuously in order to make drill bit, being badly in need of a kind of novel drilling tool of exploitation.
Summary of the invention
The present invention retreats to solve drilling process in coal seam the technical problem making cave in drill-through journey continuously, provides a kind of Hydromechanical drilling reducing reaming bit.
Technical scheme of the present invention is, a kind of Hydromechanical drilling reducing reaming bit, comprises top connection, housing, core barrel, axle, drill bit, piston system, drilling fluid flow control system, enlarging while drilling gear wheel arm assembly.
Described housing comprises the upper shell connected successively, middle shell, lower house, top connection connects upper shell, core barrel is arranged in upper shell and middle shell, axle is worn in middle shell and lower house, axle lower end connects drill bit, big spring is had at mandrel outer cover, big spring is stuck between lower house and axle, piston system comprises piston, plunger shaft and plunger shaft connecting hole, drilling liquid flow to set-up of control system between core barrel and axle, drilling fluid flow control system comprises tube connector, tube connector one end is pressure cap, the other end is water inlet, outer wall is provided with the little spring of annular, tube connector sidewall was liquid elongated hole, tube connector upper end pressure cap is positioned at core barrel bottom, tube connector lower end is communicated with axle, the piston of annular is provided with in the cavity formed in upper shell and middle shell, piston upper surface is long-pending is greater than following table area, described enlarging while drilling gear wheel arm assembly is included in the profile of tooth bar that piston side connects, outside middle shell, be provided with gear, and described gear and the engagement of profile of tooth bar, gear is connected with gear wheel arm, middle shell is provided with oblique nozzle.
Operating principle of the present invention is as follows: load transfer in the above-mentioned course of work: creep into neck at the moment, is connected with top drilling tool by connector, and the pressure of the drill reaches drill bit through upper shell, housing, lower casing, axle; Creep into end move back bore expand cave time, the pressure of the drill reaches gear wheel arm through upper shell, housing.Moment of torsion transmission in the above-mentioned course of work: creep into neck at the moment, is connected with top drilling tool by connector, and the pressure of the drill through upper shell, housing, reach axle by projection, then reaches drill bit by axle; Creep into expansion at the moment, through upper shell, housing, housing realizes reaming hole by driving on gear wheel arm.Expand cave complete, when preparing to move back brill, drilling fluid pressure release, liquid in plunger shaft is flowed out through connecting hole by plunger shaft, piston promotes piston moves under the action of the spring, and piston driving profile of tooth bar moves, and profile of tooth bar is by the inside retracted for clearance of gear driven gear wheel arm with gear wheel arm assembly rear portion.Simultaneously in the process of moving back brill, the neck eyelet of the non-reaming at boring rear portion also realizes retracted for clearance by extruding support bar and gear wheel arm.
The present invention is reasonable in design ingenious, can be implemented in drilling process identical with normal drill bit function, but moving back in drill-through journey, by piston system, drilling liquid flow to the effect of converting system, enlarging while drilling gear wheel arm assembly, gear wheel arm can be made to open, realize expanding the process that cave is made in cave.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Fig. 2 is the A-A sectional drawing of Fig. 1
Fig. 3 is the B-B sectional drawing of Fig. 1
In figure: 1-top connection, 2-upper shell, 3-core barrel, 4-middle shell, 5-lower house, 6-axle projection, 7-big spring, 8-axle, 9-drill bit, 10-plunger shaft, 11-piston, 12-T shape sealing ring, 13-cavity, 14-connector, 15-pressure cap, 16-packing ring, 17-little spring, 18-tube connector, the liquid elongated hole excessively of 18-1 sidewall, 19-water inlet, 20-O shape sealing ring, 21-plunger shaft connecting hole, 22-profile of tooth bar, 23-spring, 24-semicircular cavities, 25-nozzle connecting hole, 26-plunger shaft connecting hole, 27-bearing, the oblique nozzle of 28-, 29-locating piece, 30-support bar, 31-bearing, 32-gear, 33-gear wheel arm, 34-sliding tray, 35-roller bearing.
Detailed description of the invention
Structure and working principle of the present invention is described in detail below in conjunction with accompanying drawing 1,2,3, as schematically shown in Figure 1, a kind of Hydromechanical drilling reducing reaming bit, comprises top connection 1, housing, core barrel 3, axle 8, drill bit 9, piston system, drilling fluid flow control system, enlarging while drilling gear wheel arm assembly.
Described housing comprises the upper shell 2 connected successively, middle shell 4, lower house 5, top connection 1 connects upper shell 2, core barrel 3 is arranged in upper shell 2 and middle shell 4, axle 8 is worn in middle shell 4 and lower house 5, axle 8 lower end connects drill bit 9, outside axle 8, cover has big spring 7, big spring 7 is stuck between lower house 5 and axle 8, piston system comprises piston 11, plunger shaft 10 and plunger shaft connecting hole 21, 26, drilling liquid flow to set-up of control system between core barrel 3 and axle 8, drilling fluid flow control system comprises tube connector 18, tube connector 18 one end is pressure cap 15, the other end is water inlet 19, outer wall is provided with the little spring 17 of annular, tube connector 18 sidewall was liquid elongated hole 18-1, tube connector 18 upper end pressure cap 15 is positioned at core barrel 3 bottom, tube connector 18 lower end is communicated with axle 8, the piston 11 of annular is provided with in the cavity formed in upper shell 2 and middle shell 4, piston 11 top surface area is greater than following table area, described enlarging while drilling gear wheel arm assembly is included in the profile of tooth bar 22 that piston side connects, and outside middle shell 4, be provided with gear 32, described gear 32 and profile of tooth bar 22 engage, and gear 32 is connected with gear wheel arm 33, and middle shell 4 is provided with oblique nozzle 28.
Between middle shell 4 and axle 8, be provided with axle projection 6, make between middle shell 4 and axle 8, mutual rotation not to occur, with driving torque by axle projection 6.
Its course of work is, when in the normal drilling process forward of drill bit, drill bit 9 is subject to the pressure on top surface creeping into rock mass, promotion axle 8 extrudes big spring 7 and little spring 17 bounces back backward, the inner chamber of tube connector 18 centripetal canals 3 between axle 8 and core barrel 3 moves, connector 14 between core barrel 3 and housing 4 is closed by axle inwall, tube connector 18 extend in core barrel 3, core barrel 3 and the conducting of axle 8 inner chamber, drilling fluid enters the inner chamber of axle 8 by core barrel 3, flowed out by the nozzle before drill bit 9, increase hydraulic pressure, drill bit creeps into forward, creep into neck eye, now gear wheel arm is in closure state all the time.
After creeping into certain depth, carry out according to schedule moving back brill ream operation, get into certain position creep into forward expansion at the moment when moving back, drill bit 9 dead ahead has formed neck eye, drill bit 9 is not being pressed by the top of creeping into rock mass, big spring 7 and little spring 17 jointly promote axle 8 and move forward, tube connector 18 between core barrel 3 and axle 8 enters axle 8 inner chamber, pressure cap 15 in axle is under the effect of little spring 7, passage closes because pressure cap 15 acts on by tube connector 8, core barrel 3 is separated with housing 4, and the connector 14 on core barrel 3 sidewall is opened, then hydraulic pressure is increased, drilling fluid enters cavity 13 between core barrel 3 and housing 4, part drilling fluid enters in plunger shaft 10 through plunger shaft connecting hole 26 and 21, due to piston 11 sectional area up and down not etc., piston moves to drill bit direction under hydraulic drive, piston 11 drives profile of tooth bar 22 to move, profile of tooth bar 22 driven gear 32 rotates, gear 32 drives gear wheel arm 33 to expand outwardly, realize reaming, when after gear wheel arm opened with certain angle, then push ahead in process at drilling rod middle shell 4, borehole wall provides an outside tension force to gear wheel arm 33 simultaneously, gear wheel arm 33 opening angle continuous enlargement, until maximum extension diameter.Another part drilling fluid is sprayed by the pre-buried nozzle of nozzle connecting hole 25 in the oblique nozzle 28 and gear wheel arm of middle shell 4 outer wall, realizes the cooling to gear wheel arm 33 reaming hole process and wash boring.
Load transfer in the above-mentioned course of work: creep into neck at the moment, is connected with top drilling tool by connector 1, and the pressure of the drill reaches drill bit 9 through upper shell 2, housing 4, lower casing 5, axle 8; Creep into end move back bore expand cave time, the pressure of the drill reaches gear wheel arm 33 through upper shell 2, housing 4.Moment of torsion transmission in the above-mentioned course of work: creep into neck at the moment, is connected with top drilling tool by connector 1, and the pressure of the drill through upper shell 2, housing 4, reach axle 8 by axle projection 6, then reaches drill bit 9 by axle 8; Creep into expansion at the moment, through upper shell 2, housing 4, housing 4 realizes reaming hole by drive gear wheel arm 33.
Gear wheel arm 33 is provided with sliding tray 34, and housing 4 is provided with bearing 27, and bearing 27 connects support bar 30, and support bar 30 end is positioned at sliding tray 34.
When gear wheel arm 33 open reach maximum angle time, under the acting in conjunction of locating piece 29 and support bar 30, locking gear wheel arm, support bar 30 can increase the rigidity of gear wheel arm simultaneously.
Expand cave complete, when brill is moved back in preparation, drilling fluid pressure release, liquid in plunger shaft is flowed out through connecting hole 21,26 by plunger shaft 10, piston promotes piston 11 moves under the effect of spring 23, piston 11 drives on profile of tooth bar 22 and moves, and profile of tooth bar 22 is by driving gear wheel arm 33 inwardly retracted for clearance with the gear 32 at gear wheel arm assembly rear portion.Simultaneously in the process of moving back brill, the neck eyelet of the non-reaming at boring rear portion also realizes retracted for clearance by extruding support bar 30 and gear wheel arm 33.
Claims (3)
1. a Hydromechanical drilling reducing reaming bit, is characterized in that: comprise top connection (1), housing, core barrel (3), axle (8), drill bit (9), piston system, drilling fluid flow control system, enlarging while drilling gear wheel arm assembly,
Described housing comprises the upper shell (2) connected successively, middle shell (4), lower house (5), top connection (1) connects upper shell (2), core barrel (3) is arranged in upper shell (2) and middle shell (4), axle (8) is worn in middle shell (4) and lower house (5), axle (8) lower end connects drill bit (9), in axle (8) outside, cover has big spring (7), big spring (7) is stuck between lower house (5) and axle (8), piston system comprises piston (11), plunger shaft (10) and plunger shaft connecting hole (21, 26), drilling liquid flow to set-up of control system between core barrel (3) and axle (8), drilling fluid flow control system comprises tube connector (18), tube connector (18) one end is pressure cap (15), the other end is water inlet (19), outer wall is provided with the little spring (17) of annular, tube connector (18) sidewall was liquid elongated hole (18-1), tube connector (18) upper end pressure cap (15) is positioned at core barrel (3) bottom, tube connector (18) lower end is communicated with axle (8), annular piston (11) is provided with in upper shell (2) and the middle cavity formed of middle shell (4), piston (11) top surface area is greater than following table area, described enlarging while drilling gear wheel arm assembly is included in the profile of tooth bar (22) that piston side connects, gear (32) is provided with in middle shell (4) outside, described gear (32) and profile of tooth bar (22) engagement, gear (32) is connected with gear wheel arm (33), middle shell (4) is provided with oblique nozzle (28).
2. Hydromechanical drilling reducing reaming bit according to claim 1, is characterized in that: between middle shell (4) and axle (8), be provided with axle projection (6).
3. Hydromechanical drilling reducing reaming bit according to claim 1, it is characterized in that: gear wheel arm (33) is provided with sliding tray (34), housing (4) is provided with bearing (27), bearing (27) connects support bar (30), and support bar (30) end is positioned at sliding tray (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210583953.6A CN103046871B (en) | 2012-12-30 | 2012-12-30 | Hydra-mechanical reducing bit broaching while drilling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210583953.6A CN103046871B (en) | 2012-12-30 | 2012-12-30 | Hydra-mechanical reducing bit broaching while drilling |
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| Publication Number | Publication Date |
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| CN103046871A CN103046871A (en) | 2013-04-17 |
| CN103046871B true CN103046871B (en) | 2015-05-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288549A (en) * | 2017-07-27 | 2017-10-24 | 重庆水利电力职业技术学院 | Down-hole hammer for pile foundation engineering |
| CN109667544A (en) * | 2018-12-27 | 2019-04-23 | 中国水利水电科学研究院 | A kind of rock body drilled reamer and expanding method |
| CN110410010B (en) * | 2019-07-05 | 2024-03-22 | 九江廊威工程机械有限公司 | Pneumatic impact reamer and reaming construction process |
| CN110485929A (en) * | 2019-09-04 | 2019-11-22 | 西南石油大学 | A kind of drilling underreaming device that can be stretched repeatedly |
| CN111618331B (en) * | 2020-04-20 | 2023-06-16 | 宁夏夯中岩土工程有限公司 | Deep foundation pit supporting anchor rod in-hole reaming drill rod mechanical device and method |
| CN114352207B (en) * | 2021-11-30 | 2024-03-22 | 中国矿业大学 | Hydraulic transmission type diameter-variable PDC drill bit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5735359A (en) * | 1996-06-10 | 1998-04-07 | Weatherford/Lamb, Inc. | Wellbore cutting tool |
| CN201106404Y (en) * | 2007-10-10 | 2008-08-27 | 中国石油天然气集团公司 | Reaming machine special for casing tube welldrilling |
| CN101725322A (en) * | 2008-10-15 | 2010-06-09 | 中国石化集团胜利石油管理局钻井工艺研究院 | Drill-following reamer |
| US9175520B2 (en) * | 2009-09-30 | 2015-11-03 | Baker Hughes Incorporated | Remotely controlled apparatus for downhole applications, components for such apparatus, remote status indication devices for such apparatus, and related methods |
| CN201554373U (en) * | 2009-10-16 | 2010-08-18 | 地质矿产廊坊聚力岩土工程科技开发公司 | Small-caliber dual-wing hole-expanding drill bit for well |
| CN201778658U (en) * | 2010-08-05 | 2011-03-30 | 中国石油天然气集团公司 | Reaming-while-drilling device used for casing drilling |
| CN102003146B (en) * | 2010-11-04 | 2012-12-12 | 中国石油天然气集团公司 | Full-hydraulic reamer |
| CN203008787U (en) * | 2012-12-30 | 2013-06-19 | 中北大学 | Hydraulic mechanical reamer bit with variable diameters in drilling |
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