CN112431554A - Small-bore rock breaking drill bit - Google Patents
Small-bore rock breaking drill bit Download PDFInfo
- Publication number
- CN112431554A CN112431554A CN202011210889.8A CN202011210889A CN112431554A CN 112431554 A CN112431554 A CN 112431554A CN 202011210889 A CN202011210889 A CN 202011210889A CN 112431554 A CN112431554 A CN 112431554A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- rock
- hole
- cutting blade
- rock cutting
- 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.)
- Granted
Links
- 239000011435 rock Substances 0.000 title claims abstract description 116
- 239000002131 composite material Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 16
- 239000002893 slag Substances 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000003245 coal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
- E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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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)
- Earth Drilling (AREA)
Abstract
The invention relates to a small-aperture rock breaking drill bit which comprises a drill bit connecting part, wherein the top of the drill bit connecting part is provided with an external blade and a central blade, the external blade is arranged on the outer side of the central blade, the external blade is provided with an external rock cutting blade, the external rock cutting blade is arranged on the outer edge of the drill bit connecting part, the central blade is provided with a central rock cutting blade, the central rock cutting blade is arranged between the external rock cutting blades, the center of the drill bit connecting part is provided with a drill bit central hole, the top of the drill bit central hole is provided with a double-sided inclined hole, and two ends of the double-sided inclined hole are respectively arranged on the drill bit central hole; the invention has the advantages of improving the rock breaking speed and reducing the production size of the drilling slag.
Description
Technical Field
The invention relates to the technical field of roadway (tunnel) support, in particular to a small-aperture rock breaking drill bit.
Background
The drilling in the coal rock body is an important manifestation form of coal rock cutting, the drilling depth and direction are different according to engineering requirements, during the construction of mine production, geological drilling, oil exploitation and the like, drilling holes with the depth of several meters to thousands of meters and different directions are often required to be drilled, the rock breaking efficiency is a key factor influencing the hole forming speed, relevant researches show that in the hole forming process of the conventional wing type rock breaking drill bit with small aperture (the drilling diameter is less than 32 mm), a columnar structure is formed in the middle area of the bottom of a hole, and the drilling process is seriously hindered due to the fact that the columnar structure cannot be cut by a drill bit blade, so that the rock breaking efficiency is greatly reduced, in addition, a central rock column at the bottom of the hole is broken under the action of non-cutting force, so that the central rock column at the bottom of the hole generates large-size drilling slag, a slag discharge channel is possibly blocked, the slag discharge efficiency is seriously influenced, and the, the small-aperture rock breaking drill bit is developed, the rock at the bottom of a hole is guaranteed to be broken in a complete cutting state, the rock breaking speed can be effectively improved, the generation size of drilling slag is reduced, and the small-aperture rock breaking drill bit has important significance for improving the hole forming efficiency of small-aperture drilling.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a small-bore rock breaking drill bit which can improve the rock breaking speed and reduce the production size of drilling slag.
The purpose of the invention is realized as follows: the utility model provides a small aperture rock breaking drill bit, it includes the drill bit connecting portion, drill bit connecting portion top is provided with outside wing and central wing, outside wing sets up in the central wing outside, be provided with outside rock cutting blade on the outside wing, outside rock cutting blade sets up and follows outside the drill bit connecting portion, be provided with central rock cutting blade on the central wing, central rock cutting blade sets up between outside rock cutting blade, drill bit connecting portion center is provided with the drill bit centre bore, drill bit centre bore top is provided with two inclined holes, two inclined hole both ends set up respectively in the drill bit centre bore and the drill bit connecting portion outside.
The external rock cutting blade and the central rock cutting blade are arranged side by side and both are made of composite diamond materials and are of columnar structures.
The outer rock cutting inserts are arranged centrosymmetrically and are 2mm higher than the central rock cutting inserts.
The number of external rock cutting blades and external blades is two and the diameter of rotation of the external blades is 32 mm.
The drill bit center hole is a straight hole, the top of the drill bit center hole is connected with the inclined holes on the two sides, the diameter of the drill bit center hole is 7mm, the length of the drill bit center hole is 35mm, the diameter of the inclined holes on the two sides is 5mm, the inclined holes on the two sides are 55 degrees relative to the vertical direction, and the inclined holes on the two sides are symmetrically distributed.
The outer rock cutting blade cuts the hole bottom rock, a hole bottom center pillar is formed in the middle, and the center rock cutting blade cuts the hole bottom center pillar.
The invention has the beneficial effects that: the invention relates to a small-aperture rock breaking drill bit which comprises two external rock cutting blades, a central rock cutting blade, an external blade, a central blade, a drill bit central hole and a drill bit connecting part, wherein the external rock cutting blades and the central rock cutting blade are respectively welded on the external blade and the central blade; the invention has the advantages of improving the rock breaking speed and reducing the production size of the drilling slag.
Drawings
Fig. 1 is a schematic view of the drill bit and bottom hole rock cutting structure of the present invention.
Fig. 2 is a schematic perspective view of the drill bit of the present invention.
In the figure 1, an outer rock cutting insert 2, a central rock cutting insert 3, an outer blade 4, a central blade 5, a drill centre hole 6, a hole bottom central pillar 7, a hole bottom rock 8, a double-sided inclined hole 9, a drill bit connection.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-2, a small-bore rock breaking drill bit comprises a drill bit connecting portion 9, an outer blade 3 and a central blade 4 are arranged at the top of the drill bit connecting portion 9, the outer blade 3 is arranged on the outer side of the central blade 4, an outer rock cutting blade 1 is arranged on the outer blade 3, the outer rock cutting blade 1 is arranged on the outer edge of the drill bit connecting portion 9, a central rock cutting blade 2 is arranged on the central blade 4, the central rock cutting blade 2 is arranged between the outer rock cutting blades 1, a drill bit central hole 5 is arranged at the center of the drill bit connecting portion 9, a double-sided inclined hole 8 is arranged at the top of the drill bit central hole 5, and two ends of the double-sided inclined hole 8 are respectively arranged on the outer sides of the drill bit central hole.
The invention relates to a small-aperture rock breaking drill bit which comprises two external rock cutting blades 1, a central rock cutting blade 2, an external blade 3, a central blade 4, a drill bit central hole 5 and a drill bit connecting part 9, wherein the external rock cutting blades 1 and the central rock cutting blade 2 are respectively welded on the outside and the central blade, when a hole is formed and a rock is broken, the external rock cutting blades 1 firstly cut a hole bottom rock 7, after a hole bottom central rock pillar 6 is preliminarily formed, the central rock cutting blades 2 begin to cut the hole bottom central rock pillar 6, so that the external and central rock cutting blades jointly cut the hole bottom rock 7, the hole bottom rock 7 is guaranteed to be completely damaged in a cutting state, the hole bottom central rock pillar 6 is eliminated, the size of drilling slag is reduced, and the hole forming efficiency is improved; the invention has the advantages of improving the rock breaking speed and reducing the production size of the drilling slag.
Example 2
As shown in fig. 1-2, a small-bore rock breaking drill bit comprises a drill bit connecting portion 9, an outer blade 3 and a central blade 4 are arranged at the top of the drill bit connecting portion 9, the outer blade 3 is arranged on the outer side of the central blade 4, an outer rock cutting blade 1 is arranged on the outer blade 3, the outer rock cutting blade 1 is arranged on the outer edge of the drill bit connecting portion 9, a central rock cutting blade 2 is arranged on the central blade 4, the central rock cutting blade 2 is arranged between the outer rock cutting blades 1, a drill bit central hole 5 is arranged at the center of the drill bit connecting portion 9, a double-sided inclined hole 8 is arranged at the top of the drill bit central hole 5, and two ends of the double-sided inclined hole 8 are respectively arranged on the outer sides of the drill bit central hole.
The external rock cutting blade 1 and the central rock cutting blade 2 are arranged side by side, both are composite diamond materials, and are all in a columnar structure, the external rock cutting blade 1 is in central symmetrical arrangement, and the external rock cutting blade 1 is 2mm higher than the central rock cutting blade 2, the number of the external rock cutting blade 1 and the number of the external blades 3 are two, the rotating diameter of the external blades 3 is 32mm, the drill center hole 5 is a straight hole, the top of the drill center hole 5 is connected with the double-side inclined holes 8, the diameter of the drill center hole 5 is 7mm, the length of the drill center hole is 35mm, the diameter of the double-side inclined holes 8 is 5mm, the diameter of the double-side inclined holes is 55 degrees along the vertical direction, the double-side inclined holes 8 are symmetrically distributed, the external rock cutting blade 1 cuts the hole bottom rock 7, the hole bottom central rock pillar 6 is formed in the.
The invention relates to a small-aperture rock breaking drill bit which comprises two external rock cutting blades 1, a central rock cutting blade 2, an external blade 3, a central blade 4, a drill bit central hole 5 and a drill bit connecting part 9, wherein the external rock cutting blades 1 and the central rock cutting blade 2 are respectively welded on the outside and the central blade, when a hole is formed and a rock is broken, the external rock cutting blades 1 firstly cut a hole bottom rock 7, after a hole bottom central rock pillar 6 is preliminarily formed, the central rock cutting blades 2 begin to cut the hole bottom central rock pillar 6, so that the external and central rock cutting blades jointly cut the hole bottom rock 7, the hole bottom rock 7 is guaranteed to be completely damaged in a cutting state, the hole bottom central rock pillar 6 is eliminated, the size of drilling slag is reduced, and the hole forming efficiency is improved; the invention has the advantages of improving the rock breaking speed and reducing the production size of the drilling slag.
Claims (6)
1. The utility model provides a small aperture rock-breaking drill bit which characterized in that: it includes the drill bit connecting portion, drill bit connecting portion top is provided with outside wing and center wing, outside wing sets up in the center wing outside, be provided with outside rock cutting blade on the outside wing, outside rock cutting blade sets up along outside the drill bit connecting portion, be provided with center rock cutting blade on the center wing, center rock cutting blade sets up between outside rock cutting blade, drill bit connecting portion center is provided with the drill bit centre bore, drill bit centre bore top is provided with two-sided inclined hole, two-sided inclined hole both ends set up respectively in the drill bit centre bore and the drill bit connecting portion outside.
2. The small bore rock-breaking drill bit of claim 1, wherein: the outer rock cutting blade and the central rock cutting blade are arranged side by side and both are made of composite diamond materials and are of columnar structures.
3. The small bore rock-breaking drill bit of claim 1, wherein: the outer rock cutting blades are arranged centrosymmetrically and are 2mm higher than the central rock cutting blades.
4. The small bore rock-breaking drill bit of claim 1, wherein: the number of the external rock cutting blades and the external blades is two, and the rotation diameter of the external blades is 32 mm.
5. The small bore rock-breaking drill bit of claim 1, wherein: the drill bit center hole is a straight hole, the top of the drill bit center hole is connected with the inclined holes on two sides, the diameter of the drill bit center hole is 7mm, the length of the drill bit center hole is 35mm, the diameter of the inclined holes on two sides is 5mm, the inclined holes on two sides are 55 degrees relative to the vertical direction, and the inclined holes on two sides are symmetrically distributed.
6. The small bore rock-breaking drill bit of claim 1, wherein: the external rock cutting blade cuts the hole bottom rock, a hole bottom center rock pillar is formed in the middle of the external rock cutting blade, and the center rock cutting blade then cuts the hole bottom center rock pillar in a contact mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011210889.8A CN112431554B (en) | 2020-11-03 | 2020-11-03 | Small-aperture rock breaking drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011210889.8A CN112431554B (en) | 2020-11-03 | 2020-11-03 | Small-aperture rock breaking drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112431554A true CN112431554A (en) | 2021-03-02 |
| CN112431554B CN112431554B (en) | 2023-07-04 |
Family
ID=74695210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011210889.8A Active CN112431554B (en) | 2020-11-03 | 2020-11-03 | Small-aperture rock breaking drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112431554B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202731756U (en) * | 2012-02-06 | 2013-02-13 | 杨岗 | Diamond compact concave drill bit of |
| CN204212698U (en) * | 2014-11-04 | 2015-03-18 | 郑州远见矿用设备有限公司 | Matrix drill bits |
| CN204782788U (en) * | 2015-07-29 | 2015-11-18 | 刘芳 | Notch cuttype indent multiple wing diamond compact piece drill bit |
| CN107642335A (en) * | 2017-10-27 | 2018-01-30 | 中国水利水电第十工程局有限公司 | Can in interbedding of soft and hard rocks rock fast drilling PDC drill bit |
| CN210370507U (en) * | 2019-07-29 | 2020-04-21 | 大同安德固工程塑料制品有限责任公司 | Boron nitride diamond bit for coal mine |
| CN210422477U (en) * | 2019-07-23 | 2020-04-28 | 中山市海明润超硬材料有限公司 | Diamond compact bit |
-
2020
- 2020-11-03 CN CN202011210889.8A patent/CN112431554B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202731756U (en) * | 2012-02-06 | 2013-02-13 | 杨岗 | Diamond compact concave drill bit of |
| CN204212698U (en) * | 2014-11-04 | 2015-03-18 | 郑州远见矿用设备有限公司 | Matrix drill bits |
| CN204782788U (en) * | 2015-07-29 | 2015-11-18 | 刘芳 | Notch cuttype indent multiple wing diamond compact piece drill bit |
| CN107642335A (en) * | 2017-10-27 | 2018-01-30 | 中国水利水电第十工程局有限公司 | Can in interbedding of soft and hard rocks rock fast drilling PDC drill bit |
| CN210422477U (en) * | 2019-07-23 | 2020-04-28 | 中山市海明润超硬材料有限公司 | Diamond compact bit |
| CN210370507U (en) * | 2019-07-29 | 2020-04-21 | 大同安德固工程塑料制品有限责任公司 | Boron nitride diamond bit for coal mine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112431554B (en) | 2023-07-04 |
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