CN104675331A - Backpitch crushing and dust-collecting drill bit device - Google Patents
Backpitch crushing and dust-collecting drill bit device Download PDFInfo
- Publication number
- CN104675331A CN104675331A CN201310612621.0A CN201310612621A CN104675331A CN 104675331 A CN104675331 A CN 104675331A CN 201310612621 A CN201310612621 A CN 201310612621A CN 104675331 A CN104675331 A CN 104675331A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- backpitch
- bit body
- connecting rod
- dust suction
- 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.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention relates to a backpitch crushing and dust-collecting drill bit device. The device comprises a drill bit body (1) and a connecting rod (2) that are connected by means of threads. The drill bit body (1) is cone-shaped. A plurality of cutting vanes (11) are wound on the drill bit body (1) in parallel through a backpitch way. The drill bit body (1) is communicated with an axial air duct (21) inside the connecting rod (2) through a sieve screen (12). The side of the axial air duct (21) of the connecting rod (2) close to the drill bit body (1) is provided with a check valve (22). Efficient crushing of coal petrography can be achieved by using this crushing and dust-collecting drill bit device. The coal petrography is cut down from the coal wall fur being further crushed into fine coal powders that can be transported by air conveniently; and then the fine coal powders are outputted through the air duct after passing through the sieve screen; and the reverse flow of the fine coal powders can be prevented, thereby achieving the efficient air transport of the coal powders. The duct is uneasy to be blocked, thus increasing the pore-forming efficiency and the pore-forming quality.
Description
Technical field
The present invention relates to the drill bit used for the soft projecting coal bed hole-drilling system that draws out methane in colliery, a kind of backpitch that the deep well drilling pore-forming system polluted without coal dust and drawing-off gas for the soft projecting coal bed totally-enclosed wind power slag-discharging in colliery that particularly relates to uses pulverizes dust suction drill bit device.
Background technology
Colliery soft projecting coal bed in, adopt during conventional bit operation and easily cause the situations such as collapse hole, plug-hole, spray orifice, crown drill, the blocking of drill bit cavity inner filter core occur in operation process, in boring procedure, wind power slag-discharging also easily causes gas in operating environment to be revealed and coal dust explosion hazard.In a word, the drill bit device of routine work in use easily has an accident and operating efficiency is low.
Chinese patent manual CN 103352659 A discloses a kind of backpitch and pulverizes dust suction drill bit, comprise connecting rod and more than three the backpitch wings evenly arranged, the rib portion of each backpitch wing is equipped with blade, the rear end of each backpitch wing is all connected to the front end of described connecting rod, the rear portion diameter of connecting rod is less than connecting rod main diameter and forms the connection part for jointed rod, and the peripheral surface of connection part is provided with connection screw thread.But the bore of the backpitch wing of this drill bit from front end to trailing edge is not progressively increase, and cause the blade on trailing edge to give full play to effect, thus operating efficiency is lower, and easily cause gathering coal to enter drilling rod causing plug-hole to cause accident.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of backpitch and pulverizes dust suction drill bit device, realizes high efficiency boring, and can effectively prevent from gathering coal from creeping into drilling rod causing plug-hole, improve security performance.
A kind of backpitch of the present invention pulverizes dust suction drill bit device, comprises the bit body 1 and connecting rod 2 that connect threadably, described bit body 1 is provided with wing 11.Described bit body 1 is conical, and described wing 11 is parallel, backpitch shape is coiled on bit body 1.Described bit body 1 is communicated with the axial air flue 21 in described connecting rod 2 by screen cloth 12.The surface configuration that described screen cloth 12 contacts with screen cloth 12 with described rotary head body 1 inner surface matches.After adopting such structure, when rig creeps into, blade 13 on wing 11 can fully contact with coal seam, thus raising drilling efficiency, and bit body 1 rear end bore is greater than front end bore, coal dust elegant produced when can effectively control to creep into, avoids contaminated environment, meanwhile, screen cloth 12 can block bulky grain ickings enter drilling rod cause blocking thus improve security performance.
As a modification of the present invention, described wing 11 two sides and front are provided with blade 13, blade 13 for wolfram steel material simultaneously described in screen cloth 12 can rotate relative to rotary head body 1 centered by the axis of described rotary head body 1, like this, the bulky grain ickings that obstruct is depended on screen cloth 12 outer peripheral face is under self gravitation effect, screen cloth 12 and bulky grain ickings can be rotated relative to bit body 1, directly pulverized or scrape by the blade of backpitch wing 11 side at the bottom of hole backpitch wing being transported to boring after bulky grain ickings and wing contacts side surfaces and re-start pulverizing.
Improve as another kind of the present invention, the axial air flue 21 of described connecting rod 2 is provided with non retern valve 22 near bit body 1 side, thus effectively can prevent the adverse current of gas, thus improves the safety of operation.
In sum, distinguishing feature of the present invention to improve drilling efficiency, prevents blocking and adverse current, improves security performance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1 bit body, 11 wings, 12 screen clothes, 13 blades, 2 connecting rods, 21 axial air flues, 22 non retern valves.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
As shown in Figure 1, a kind of backpitch of the present invention pulverizes dust suction drill bit device, comprises the bit body 1 and connecting rod 2 that connect threadably.Described bit body 1 is conical, and described wing 11 is parallel, backpitch shape is coiled on described bit body 1, and the interval between each bar wing 11 specifically can be arranged according to coal seam situation.Two sides of wing 11 and front are provided with blade 13.Be provided with screen cloth 12 in bit body 1, screen cloth 12 matches with bit body 1 inner surface configuration, and is flexibly connected by riveted joint or other modes and bit body 1 two ends, and screen cloth 12 can be rotated relative to the axis of bit body 1.Be provided with axial air flue 21 in described connecting rod 2, the bottom of axial air flue 21 is provided with non retern valve near bit body 1 side.
During work, connecting rod 2 of the present invention is connected with drilling rod, be dynamically connected bar 2 and bit body 1 and the wing on it 11 and blade 13 of drilling rod rotating band rotates, thus coal petrography is got off from cut rib, now can produce the tiny coal dust of particle and the larger ickings of particle, the tiny coal dust of particle rotates at drilling rod, under the effect of positive and negative blast and backpitch wing 11, to be flowed in the axial air flue 21 in connecting rod 2 at the place of creeping into formation air-flow by screen cloth 12.Bulky grain ickings is then blocked on outside screen cloth 12, be attached to bulky grain ickings on screen cloth 12 under self gravitation effect, screen cloth 12 and bulky grain ickings can be rotated relative to bit body 1, directly pulverized or scrape by the blade 13 of backpitch wing 11 side at the bottom of hole backpitch wing being transported to boring after bulky grain ickings and wing 11 contacts side surfaces and re-start pulverizing.
Claims (6)
1. a backpitch pulverizes dust suction drill bit device, comprise the bit body (1) and connecting rod (2) that connect threadably, described bit body (1) is provided with wing (11), it is characterized in that: described bit body (1) is for conical, and described wing (11) is parallel, backpitch shape is coiled on bit body (1); Described bit body (1) is communicated with the axial air flue (21) in described connecting rod (2) by screen cloth (12).
2. a kind of backpitch according to claims 1 pulverizes dust suction drill bit device, it is characterized in that: the surface configuration that described screen cloth (12) contacts with screen cloth (12) with described rotary head body (1) inner surface matches.
3. a kind of backpitch according to claims 1 pulverizes dust suction drill bit device, it is characterized in that: described wing (11) two sides and front are provided with blade (13).
4. a kind of backpitch according to any one of claims 1 to 3 pulverizes dust suction drill bit device, it is characterized in that: described blade (13) is wolfram steel material.
5. a kind of backpitch according to any one of claims 1 to 3 pulverizes dust suction drill bit device, it is characterized in that: described screen cloth (12) can rotate relative to rotary head body (1) centered by the axis of described rotary head body (1).
6. a kind of backpitch according to claims 1 pulverizes dust suction drill bit device, it is characterized in that: the axial air flue (21) of described connecting rod (2) is provided with non retern valve (22) near bit body (1) side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612621.0A CN104675331A (en) | 2013-11-28 | 2013-11-28 | Backpitch crushing and dust-collecting drill bit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612621.0A CN104675331A (en) | 2013-11-28 | 2013-11-28 | Backpitch crushing and dust-collecting drill bit device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104675331A true CN104675331A (en) | 2015-06-03 |
Family
ID=53310861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310612621.0A Pending CN104675331A (en) | 2013-11-28 | 2013-11-28 | Backpitch crushing and dust-collecting drill bit device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104675331A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108476771A (en) * | 2018-03-29 | 2018-09-04 | 务川自治县绿果农业开发有限公司 | The implantation methods of plum |
| CN115045612A (en) * | 2022-08-16 | 2022-09-13 | 山东黄金集团国际矿业开发有限公司 | Geological mineral exploration is with back position breaker |
-
2013
- 2013-11-28 CN CN201310612621.0A patent/CN104675331A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108476771A (en) * | 2018-03-29 | 2018-09-04 | 务川自治县绿果农业开发有限公司 | The implantation methods of plum |
| CN108476771B (en) * | 2018-03-29 | 2020-11-24 | 宝应县金运开发有限公司 | Plum planting method |
| CN115045612A (en) * | 2022-08-16 | 2022-09-13 | 山东黄金集团国际矿业开发有限公司 | Geological mineral exploration is with back position breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |