CN102337840A - Self-guiding water pressure-switching cutting type broaching drill bit - Google Patents

Self-guiding water pressure-switching cutting type broaching drill bit Download PDF

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Publication number
CN102337840A
CN102337840A CN2011102760299A CN201110276029A CN102337840A CN 102337840 A CN102337840 A CN 102337840A CN 2011102760299 A CN2011102760299 A CN 2011102760299A CN 201110276029 A CN201110276029 A CN 201110276029A CN 102337840 A CN102337840 A CN 102337840A
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CN
China
Prior art keywords
drill bit
guiding
guide way
bit
hole
Prior art date
Application number
CN2011102760299A
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Chinese (zh)
Other versions
CN102337840B (en
Inventor
林柏泉
张连军
王春利
Original Assignee
中国矿业大学
徐州博安科技发展有限责任公司
Priority date (The priority date 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 date listed.)
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Application filed by 中国矿业大学, 徐州博安科技发展有限责任公司 filed Critical 中国矿业大学
Priority to CN 201110276029 priority Critical patent/CN102337840B/en
Publication of CN102337840A publication Critical patent/CN102337840A/en
Application granted granted Critical
Publication of CN102337840B publication Critical patent/CN102337840B/en

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Abstract

The invention discloses a self-guiding water pressure-switching cutting type broaching drill bit, comprising a guiding body of which a head part is provided with a guiding body cavity therein, wherein the head part of the guiding body is provided with a step through hole communicating with the front end of the guiding body cavity, an axial cutting nozzle is arranged in the step through hole, the circumferential surface of the front part of the guiding body is provided with a plurality of radial step through holes communicating with the front end of the guiding body cavity, each radial step through hole is provided with a radial cutting nozzle therein, the circumferential surface of the middle part of the guiding body is provided with a plurality of radial holes communicating with the middle part of the guiding body cavity, a check valve is arranged in each radial hole, the tail of the guiding body is sleeved with a drill bit body, the drill bit body is provided with a plurality of drill bit vanes, and the cutting edge side of each drill bit vane is attached with a diamond blade. High pressure water is used as a working medium, and the flow of the cutting nozzle is changed by switching high pressure water power, therefore, the self-guiding water pressure-switching cutting type broaching drill bit not only is self-guiding but also has a function of repeated switching; a drilling coal seam can be released in pressure and increased in permeability by using the high pressure water jet, therefore, the air permeability of the coal seam is enhanced and the gas extraction efficiency is also enhanced. The self-guiding water pressure-switching cutting type broaching drill bit has the advantages of simple structure, convenience for operation and good using effect.

Description

Switch slot formula reaming bit from guiding hydraulic pressure
Technical field
The present invention relates to a kind of drill bit, especially a kind of hydraulic pressure of guiding certainly of coal mine underground coal bed gas control that is applicable to switches slot formula reaming bit.
Background technology
When control of coalmine gas is holed, wait under the geological conditions because high-ground stress and coal seam are soft, cause the hole of very easily collapsing after the boring, so the employing reaming bit carries out reaming to having to hole, to reach coal-bed gas extraction effect.The existing reaming bit that uses is conventional bit, and the gas permeability in coal seam is poor, can't provide gas pumping equipment enough running environment.Therefore, need in reaming, to have the slot formula reaming bit that can improve gas permeability of coal seam in a hurry.
Summary of the invention
Technical problem: the objective of the invention is to overcome deficiency of the prior art, provide a kind of hydraulic pressure of guiding certainly simple in structure, that can improve gas permeability of coal seam to switch slot formula reaming bit.
Technical scheme: of the present invention from the hydraulic pressure switching slot formula reaming bit that leads; Comprise that head is the guide way that inside is provided with the guide way vestibule; The head of guide way is provided with the ladder hole that communicates with guide way vestibule front end, is provided with an axial slot nozzle in the ladder hole, and the anterior periphery of guide way is provided with a plurality of radially ladder holes that communicate with guide way vestibule front end; Each radially is equipped with radially slot nozzle in the ladder hole; The afterbody of guide way is set with bit body, and bit body is provided with a plurality of drill bit wings, and cutting edge one side of the drill bit wing all is attached with the diamond blade; Each drill bit wing prolongs on the guide way of axial forward end and is equipped with a radial hole that communicates with the guide way vestibule, is provided with one way valve in each radial hole.
The axial guard strip of guide way that described guide way external surface is provided with many carbide alloy; Described slot nozzle is 2~4; The outer rim of the described drill bit wing is provided with the drill bit wing reinforcing rib of bar shaped carbide alloy; The described drill bit wing is 2~4; Described one way valve comprises that afterbody has the spring-loaded plunger in hole, is located at spring and stopper head in the spring-loaded plunger.
Beneficial effect: reaming bit of the present invention is a working media with the water under high pressure, simultaneously with water under high pressure as switching power; Not only have from guidance quality; Also have the function of switching repeatedly,, an axial slot nozzle, a plurality of radially slot nozzle are set through being connected with the guide way on the bit body; Make each drill bit wing on the bit body prolong axial forward end and all be provided with weep hole; Each weep hole and guide way vestibule connecting place all are provided with one way valve successively, and the grinding side effect of adopting drill bit wing reinforcing rib and the axial guard strip of guide way can protect whole drill bit in drilling process, to produce makes drill bit integral body have better life-span and pore-forming effect.The water under high pressure that in drilling process, sprays plays guide effect to washing away coal body; When bit body creeps into and under the low situation of hydraulic pressure; Current pass through the stopper head of guide way vestibule compression one way valve to camber of spring; Make the water in the guide way vestibule from the weep hole of stopper head, spray, played the cooling effect that produces heat when creeping into; In the time need carrying out the slot operation to the boring after the reaming, improve intake pressure, stopper head compression spring to plunger bushing seals; Weep hole is not circulated, this moment water in guide way fast supercharging reach the work of high-pressure water jet slot carried out in the coal seam from axial slot nozzle with radially penetrate the slot nozzle; Can be implemented in the existing boring; It is anti-reflection to adopt high-pressure water jet that release is carried out in the boring coal seam, improves gas permeability of coal seam, improves gas pumping efficient and plays effect preferably.It is simple in structure, easy to operate, result of use is good, has practicality widely.
Description of drawings
Fig. 1 is a main TV structure sectional view of the present invention.
Fig. 2 is left TV structure figure of the present invention.
Fig. 3 is a main TV structure outline drawing of the present invention.
Among the figure: the axial slot nozzle of 1-, 2-guide way, 3-be the slot nozzle radially, 4-plunger bushing, 5 springs, 6-stopper head, 7-guide way vestibule, the 8-drill bit wing, 9-drill bit wing reinforcing rib, the axial guard strip of 10-guide way, 11-weep hole, 12-diamond blade, 13-bit body.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are further described:
Shown in accompanying drawing, of the present inventionly switch slot formula reaming bit mainly by axial slot nozzle 1, guide way 2, radially slot nozzle 3, one way valve, the drill bit wing 8, diamond blade 12 and bit body 13 constitute from the hydraulic pressure that leads.Axially slot nozzle 1 is connected on the guide way 2; Guide way 2 is equipped with a plurality of radially slot nozzles 3 diametrically; Axially slot nozzle 1 is with radially slot nozzle 3 is through guide way vestibule 7 UNICOMs, and guide way 2 ends are provided with bit body 13, and bit body 13 is provided with a plurality of drill bit wings 8; Each drill bit wing 8 prolongs axial forward end and all is provided with weep hole 11; Each weep hole 11 all is provided with the one way valve that is made up of stopper head 6, spring 5 and plunger bushing 4 successively with guide way vestibule 7 connecting places, and stopper head 6 can move in guide way, and the drill bit wing 8 outer circumference surfaces are provided with a plurality of drill bit wing reinforcing ribs 9; Guide way 2 outer circumference surfaces and front end face are provided with the axial guard strip 10 of a plurality of guide waies, and each drill bit wing 8 is provided with a plurality of diamond blades 12.Axially slot nozzle 1 is threaded with guide way 2 usefulness; Radially slot nozzle 3 is threaded with guide way 2 usefulness; The drill bit wing 8 and guide way 2 adopts welding or is threaded fixingly, and drill bit wing reinforcing rib 9 adopts welding fixing with the drill bit wing 8, and the axial guard strip 10 of guide way adopts welding fixing with guide way 2; Diamond blade 12 adopts welding fixing with the drill bit wing 8, and stopper head 6 is fixing through plunger bushing 4 compression springs 5; Have weep hole 11 on the plunger bushing 4; Diamond blade 12 is PDC composite sheet commonly used; Plunger bushing 4 is threaded with guide way 2 usefulness; Said stopper head 6 is a spheroid.
The operating principle and the course of work: in the reaming drilling process; With water at atmospheric pressure or have the water of pressure to carry out reaming slightly to creep into work, when reaming boring work stops to move back when boring slot, increase hydraulic pressure to definite value and more than; Sealing in stopper head 6 compression spring 5 to the plunger bushings 4; Make in the guide way 2 water from axial slot nozzle 1 with radially penetrate the slot nozzle 3, reach coal and rock realized high pressure slot effect, the operation of completion slot.

Claims (6)

1. the hydraulic pressure that leads certainly switches slot formula reaming bit; It is characterized in that: it comprises that head is the guide way (2) that inside is provided with guide way vestibule (7); The head of guide way (2) is provided with the ladder hole that communicates with guide way vestibule (7) front end; Be provided with an axial slot nozzle (1) in the ladder hole; The anterior periphery of guide way (2) is provided with a plurality of radially ladder holes that communicate with guide way vestibule (7) front end, and each radially is equipped with radially slot nozzle (3) in the ladder hole, and the afterbody of guide way (2) is set with bit body (13); Bit body (13) is provided with a plurality of drill bit wings (8); Cutting edge one side of the drill bit wing (8) all is attached with diamond blade (12), and each drill bit wing (8) prolongs on the guide way (2) of axial forward end and is equipped with a radial hole that communicates with guide way vestibule (7), is provided with one way valve in each radial hole.
2. according to claim 1 from the hydraulic pressure switching slot formula reaming bit that leads, it is characterized in that: described guide way (2) external surface is provided with the axial guard strip of guide way (10) of many carbide alloy.
3. according to claim 1 from the hydraulic pressure switching slot formula reaming bit that leads, it is characterized in that: described slot nozzle (3) is 2~4.
4. according to claim 1 from the hydraulic pressure switching slot formula reaming bit that leads, it is characterized in that: the outer rim of the described drill bit wing (8) is provided with the drill bit wing reinforcing rib (9) of bar shaped carbide alloy.
5. switch slot formula reaming bit according to claim 1 or the 4 described hydraulic pressure that lead certainly, it is characterized in that: the described drill bit wing (8) is 2~4.
6. according to claim 1 from the hydraulic pressure switching slot formula reaming bit that leads, it is characterized in that: described one way valve comprises that afterbody has the spring-loaded plunger in hole (4), is located at spring (5) and stopper head (6) in the spring-loaded plunger (4).
CN 201110276029 2011-09-19 2011-09-19 Self-guiding water pressure-switching cutting type broaching drill bit CN102337840B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110276029 CN102337840B (en) 2011-09-19 2011-09-19 Self-guiding water pressure-switching cutting type broaching drill bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201110276029 CN102337840B (en) 2011-09-19 2011-09-19 Self-guiding water pressure-switching cutting type broaching drill bit

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CN102337840A true CN102337840A (en) 2012-02-01
CN102337840B CN102337840B (en) 2013-06-05

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102561311A (en) * 2012-02-17 2012-07-11 苏州市能工基础工程有限责任公司 Multifunctional high-pressure rotary ejecting step-reaming bit
CN102767334A (en) * 2012-07-10 2012-11-07 苏州市能工基础工程有限责任公司 Multifunctional combined drill bit
CN102767335A (en) * 2012-07-10 2012-11-07 苏州市能工基础工程有限责任公司 Improved-type multifunctional combined drill bit
CN102966310A (en) * 2012-12-17 2013-03-13 中国矿业大学 Induced flow device and method for water jet kerf in drilled hole
CN103611227A (en) * 2013-07-30 2014-03-05 陈苏 Drilling and through-wall fire extinguishing device
CN106320985A (en) * 2016-09-18 2017-01-11 重庆大学 High-pressure water jet punching-drilling-expanding-cutting integrated antireflection device for coal seam, and related method
CN108086901A (en) * 2017-12-12 2018-05-29 中煤科工集团重庆研究院有限公司 A kind of netted slot anti-reflection method of layer-through drilling
CN109630021A (en) * 2018-11-08 2019-04-16 中煤科工集团西安研究院有限公司 A kind of spinning jet stream is from into seam cutting drill bit
CN111255381A (en) * 2020-03-05 2020-06-09 中煤科工集团重庆研究院有限公司 Comprehensive permeability increasing device for coal bed mechanical reaming and hydraulic slotting

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2304748Y (en) * 1997-07-24 1999-01-20 辽河石油勘探局钻采工艺研究院 Underground borer of high pressure jet well
US20020050408A1 (en) * 2000-10-27 2002-05-02 Nackerud Alan L. Method and apparatus for enlarging well bores
CN201090139Y (en) * 2007-10-11 2008-07-23 中国矿业大学 Press control drill scalpel integration drilling bit
CN101225736A (en) * 2008-02-01 2008-07-23 西南石油大学 Hydraulic double-acting drilling reamer
CN202300202U (en) * 2011-09-19 2012-07-04 中国矿业大学 Self-guide water-pressure switching slit type reaming drill bit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2304748Y (en) * 1997-07-24 1999-01-20 辽河石油勘探局钻采工艺研究院 Underground borer of high pressure jet well
US20020050408A1 (en) * 2000-10-27 2002-05-02 Nackerud Alan L. Method and apparatus for enlarging well bores
CN201090139Y (en) * 2007-10-11 2008-07-23 中国矿业大学 Press control drill scalpel integration drilling bit
CN101225736A (en) * 2008-02-01 2008-07-23 西南石油大学 Hydraulic double-acting drilling reamer
CN202300202U (en) * 2011-09-19 2012-07-04 中国矿业大学 Self-guide water-pressure switching slit type reaming drill bit

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102561311A (en) * 2012-02-17 2012-07-11 苏州市能工基础工程有限责任公司 Multifunctional high-pressure rotary ejecting step-reaming bit
CN102767334B (en) * 2012-07-10 2015-08-05 苏州市能工基础工程有限责任公司 A kind of multifunctional combination drill bit
CN102767334A (en) * 2012-07-10 2012-11-07 苏州市能工基础工程有限责任公司 Multifunctional combined drill bit
CN102767335A (en) * 2012-07-10 2012-11-07 苏州市能工基础工程有限责任公司 Improved-type multifunctional combined drill bit
CN102767335B (en) * 2012-07-10 2015-08-05 苏州市能工基础工程有限责任公司 A kind of improved multifunctional combined drill
CN102966310A (en) * 2012-12-17 2013-03-13 中国矿业大学 Induced flow device and method for water jet kerf in drilled hole
CN102966310B (en) * 2012-12-17 2015-08-19 中国矿业大学 Water jet slot induced flow device and method in a kind of boring
CN103611227A (en) * 2013-07-30 2014-03-05 陈苏 Drilling and through-wall fire extinguishing device
CN106320985A (en) * 2016-09-18 2017-01-11 重庆大学 High-pressure water jet punching-drilling-expanding-cutting integrated antireflection device for coal seam, and related method
CN108086901A (en) * 2017-12-12 2018-05-29 中煤科工集团重庆研究院有限公司 A kind of netted slot anti-reflection method of layer-through drilling
CN109630021A (en) * 2018-11-08 2019-04-16 中煤科工集团西安研究院有限公司 A kind of spinning jet stream is from into seam cutting drill bit
CN109630021B (en) * 2018-11-08 2020-05-05 中煤科工集团西安研究院有限公司 Self-rotating jet flow self-feeding slotting drill bit
CN111255381A (en) * 2020-03-05 2020-06-09 中煤科工集团重庆研究院有限公司 Comprehensive permeability increasing device for coal bed mechanical reaming and hydraulic slotting

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