CN202300202U - Self-guide water-pressure switching slit type reaming drill bit - Google Patents
Self-guide water-pressure switching slit type reaming drill bit Download PDFInfo
- Publication number
- CN202300202U CN202300202U CN2011203488127U CN201120348812U CN202300202U CN 202300202 U CN202300202 U CN 202300202U CN 2011203488127 U CN2011203488127 U CN 2011203488127U CN 201120348812 U CN201120348812 U CN 201120348812U CN 202300202 U CN202300202 U CN 202300202U
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- China
- Prior art keywords
- drill bit
- guide way
- guide body
- guide
- hole
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- Expired - Lifetime
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- 229910003460 diamond Inorganic materials 0.000 claims abstract description 8
- 239000010432 diamond Substances 0.000 claims abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000003245 coal Substances 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 8
- 230000035699 permeability Effects 0.000 abstract description 6
- 238000005553 drilling Methods 0.000 abstract description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a self-guide water-pressure switching slit type reaming drill bit which comprises a guide body, wherein the head part of the guide body is internally provided with a guide body hole cavity; the head part of the guide body is provided with a stepped through hole communicated with the front end of the guide body hole cavity; the stepped through hole is internally provided with an axial slit nozzle; the circumferential surface of the front part of the guide body is provided with a plurality of radial stepped through holes which are communicated with the front end of the guide body hole cavity; each radial stepped through hole is internally provided with a radial slit nozzle; the circumferential surface of the middle part of the guide body is provided with a plurality of radial holes communicated with the middle part of the guide body hole cavity; the radial holes are internally provided with one-way valves; a drill bit body is sheathed at the tail part of the guide body, and is provided with a plurality of drill bit wings; and a diamond blade is attached at one side of an edge of each drill bit wing. The self-guide water-pressure switching slit type reaming drill bit adopts high-pressure water as a working medium, changes the flow rate of the slit nozzle by switching the power of the high-pressure water, not only has the self-guide performance, but also has a repeated-switching function, and carries out pressure releasing and permeability increasing on a drilling coal seam by adopting high-pressure water jet flow, thus improving the air permeability of the coal seam and improving the gas drainage efficiency. The self-guide water-pressure switching slit type reaming drill bit has the advantages of simple structure, convenience in operation and good use effect.
Description
Technical field
The utility model relates to a kind of drill bit, and 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 purpose of the utility model is to overcome deficiency of the prior art, provides 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: the hydraulic pressure of guiding certainly of the utility model switches slot formula reaming bit; 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 plunger bushing in hole, is located at spring and stopper head in the plunger bushing.
Beneficial effect: the reaming bit of the utility model 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 the main TV structure sectional view of the utility model.
Fig. 2 is the left TV structure figure of the utility model.
Fig. 3 is the main TV structure outline drawing of the utility model.
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
Embodiment to the utility model is further described below in conjunction with accompanying drawing:
Shown in accompanying drawing, the hydraulic pressure of guiding certainly of the utility model switches 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.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 plunger bushing in hole (4), is located at spring (5) and stopper head (6) in the plunger bushing (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203488127U CN202300202U (en) | 2011-09-19 | 2011-09-19 | Self-guide water-pressure switching slit type reaming drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203488127U CN202300202U (en) | 2011-09-19 | 2011-09-19 | Self-guide water-pressure switching slit type reaming drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202300202U true CN202300202U (en) | 2012-07-04 |
Family
ID=46369124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203488127U Expired - Lifetime CN202300202U (en) | 2011-09-19 | 2011-09-19 | Self-guide water-pressure switching slit type reaming drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202300202U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337840A (en) * | 2011-09-19 | 2012-02-01 | 中国矿业大学 | Self-guiding water pressure-switching cutting type broaching drill bit |
| CN103470264A (en) * | 2013-09-16 | 2013-12-25 | 金陵科技学院 | Water jet cutter |
| CN105089500A (en) * | 2015-09-11 | 2015-11-25 | 重庆大学 | Coal mine downhole hydraulic jet tree-shaped drill hole way-type drilling unit |
| CN106150500A (en) * | 2016-08-26 | 2016-11-23 | 中煤科工集团重庆研究院有限公司 | Ultrahigh pressure hydraulic drilling, expanding and cutting integrated device |
| CN114352207A (en) * | 2021-11-30 | 2022-04-15 | 中国矿业大学 | Hydraulic transmission type variable-diameter PDC drill bit |
| CN116025290A (en) * | 2023-03-30 | 2023-04-28 | 成都迪普金刚石钻头有限责任公司 | Pressure self-adaptive PDC drill bit |
-
2011
- 2011-09-19 CN CN2011203488127U patent/CN202300202U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337840A (en) * | 2011-09-19 | 2012-02-01 | 中国矿业大学 | Self-guiding water pressure-switching cutting type broaching drill bit |
| CN103470264A (en) * | 2013-09-16 | 2013-12-25 | 金陵科技学院 | Water jet cutter |
| CN105089500A (en) * | 2015-09-11 | 2015-11-25 | 重庆大学 | Coal mine downhole hydraulic jet tree-shaped drill hole way-type drilling unit |
| CN106150500A (en) * | 2016-08-26 | 2016-11-23 | 中煤科工集团重庆研究院有限公司 | Ultrahigh pressure hydraulic drilling, expanding and cutting integrated device |
| 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 |
| CN116025290A (en) * | 2023-03-30 | 2023-04-28 | 成都迪普金刚石钻头有限责任公司 | Pressure self-adaptive PDC drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120704 Effective date of abandoning: 20130605 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20120704 Effective date of abandoning: 20130605 |
|
| RGAV | Abandon patent right to avoid regrant |