CN203961805U - A kind of drawing-in type reverse circulation sampling bit - Google Patents
A kind of drawing-in type reverse circulation sampling bit Download PDFInfo
- Publication number
- CN203961805U CN203961805U CN201420394676.9U CN201420394676U CN203961805U CN 203961805 U CN203961805 U CN 203961805U CN 201420394676 U CN201420394676 U CN 201420394676U CN 203961805 U CN203961805 U CN 203961805U
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- bit
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- pipe
- bit body
- reverse circulation
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Abstract
The utility model relates to a kind of drawing-in type reverse circulation sampling bit, this chisel bit is by bit body, built-in pipe, interior spray-hole, flow channel, shoulder, ball tooth, annular nozzle, inner arc surface and annular gap composition, gas enters the annular gap between built-in pipe and bit body through interior spray-hole, then from annular nozzle ejection at a high speed, ejection narrow thin high velocity air due to wall attachment effect be close to cambered surface flow, around annular nozzle, produce larger vacuum, thereby produce powerful suction force, the gas of drill bit bottom and annular space can be sucked to central passage, and carry out cooling to drill bit.Drawing-in type reverse circulation sampling bit described in the utility model can increase substantially anti-circulation and form effect.
Description
Technical field
The utility model belongs to hard-rock boring and other probing field, particularly a kind of drawing-in type reverse circulation sampling bit.
Background technology
Drawing-in type reverse circulation sampling bit technology has been successfully applied to the fields such as mineral resources, hydrological well probing, basic engineering construction, also has a wide range of applications in emergency relief field, colliery.Anti-circulation formation difficulty in the time that stratigraphic anormaly is broken or leakage stratum met by brill, portion gas is discharged in direct circulation mode from annular clearance, causes hole bed rock bits to be removed not thorough, affects drilling efficiency.Drill bit structure form has decisive role to reverse circulating formation, and reverse circulation drill bit reasonable in design forms effect to improving anti-circulation, ensures that hollow hammer hole carries out significant safe, fast, efficiently.
Summary of the invention
The utility model object is, form not thoroughly technical barrier for existing reverse circulation drill bit anti-circulation of broken formation, based on coanda wall attachment effect, a kind of drawing-in type reverse circulation sampling bit is provided, this chisel bit is by bit body, built-in pipe, interior spray-hole, flow channel, shoulder, ball tooth, annular nozzle, inner arc surface and annular gap composition, gas enters the annular gap between built-in pipe and bit body through interior spray-hole, then from annular nozzle ejection at a high speed, ejection narrow thin high velocity air due to wall attachment effect be close to cambered surface flow, around annular nozzle, produce larger vacuum, thereby produce powerful suction force, the gas of drill bit bottom and annular space can be sucked to central passage, and carry out cooling to drill bit.Drawing-in type reverse circulation sampling bit described in the utility model can increase substantially anti-circulation and form effect.
Drawing-in type reverse circulation sampling bit described in the utility model, this chisel bit is made up of bit body, built-in pipe, interior spray-hole, flow channel, shoulder, ball tooth, annular nozzle, inner arc surface and annular gap, on bit body (1), be provided with the interior spray-hole (3) of several symmetries, bottom centre's passage of bit body (1) is provided with shoulder (5), bit body (1) end labial surface is provided with several flow channels (4), bit body (1) is by screw thread or the fixing built-in pipe (2) of screw, and the lower end of built-in pipe (2) is inner arc surface (8).
The built-in pipe (2) of described drawing-in type reverse circulation sampling bit and bit body (1) inwall composition annular gap (9), built-in pipe (2) inner arc surface (8) forms annular nozzle (7) with the shoulder (5) of bit body (1).
Described drawing-in type reverse circulation sampling bit of the present utility model, the operating principle of this chisel bit: in the time of the normal percussion drilling of down-hole hammer, a part of waste gas after the acting of driving down-hole hammer piston enters the interior spray-hole (3) of bit body (1), then come downwards to annular nozzle (7) along annular gap (9), due to the wall attachment effect of gas, high velocity air will be along circular arc inwall (8) jet attached flow of built-in pipe (2) lower end, under the effect of entrainmenting of high velocity air, gas around constantly flows to cambered surface, and produce in its vicinity larger region of no pressure, under the effect of pressure differential, at the bottom of hole and the gas cutting carring of annular space enter central passage and carry out cooling to drill bit along drill bit bottom flow passage (4).
The beneficial effects of the utility model: from the narrow thin high velocity air of annular space nozzle ejection, due to wall attachment effect be close to cambered surface flow, can produce around larger vacuum, produce powerful suction force, can increase substantially creep in reverse circulating formation effect, can solve fragmentation, the anti-halfway technical barrier of formation that circulates in leakage stratum, be conducive to improve down-hole hammer and creep into efficiency and rock sample taking rate.
Brief description of the drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is labial surface schematic diagram at the bottom of the utility model.
Detailed description of the invention:
Further describe and provide embodiment below in conjunction with accompanying drawing:
Drawing-in type reverse circulation sampling bit described in the utility model, this chisel bit is by bit body, built-in pipe, interior spray-hole, flow channel, shoulder, ball tooth, annular nozzle, inner arc surface and annular gap composition, on bit body 1, be provided with the interior spray-hole 3 of several symmetries, on bottom centre's passage of bit body 1, be provided with shoulder 5, 1 end of bit body labial surface is provided with several flow channels 4, fix built-in pipe 2 at bit body 1 by screw thread or screw, the lower end of built-in pipe 2 is inner arc surface 8, built-in pipe 2 and bit body 1 inwall composition annular gap 9, built-in pipe 2 inner arc surfaces 8 form annular nozzle 7 with the shoulder 5 of bit body 1,
In use, in the time of the normal percussion drilling of down-hole hammer, a part of waste gas after the acting of driving down-hole hammer piston enters the interior spray-hole 3 of bit body 1, then come downwards to annular nozzle 7 along annular gap 9, due to the wall attachment effect of gas, high velocity air will be along built-in pipe circular arc inwall 8 jet attached flows, under the effect of entrainmenting of high velocity air, gas around constantly flows to cambered surface, and produce in its vicinity larger region of no pressure, under the effect of pressure differential, at the bottom of hole and the gas cutting carring of annular space enter central passage and carry out cooling to drill bit along drill bit bottom flow passage 4.
Claims (2)
1. a drawing-in type reverse circulation sampling bit, it is characterized in that this chisel bit is made up of bit body, built-in pipe, interior spray-hole, flow channel, shoulder, ball tooth, annular nozzle, inner arc surface and annular gap, on bit body (1), be provided with the interior spray-hole (3) of several symmetries, bottom centre's passage of bit body (1) is provided with shoulder (5), bit body (1) end labial surface is provided with several flow channels (4), bit body (1) is by screw thread or the fixing built-in pipe (2) of screw, and the lower end of built-in pipe (2) is inner arc surface (8).
2. drawing-in type reverse circulation sampling bit according to claim 1, it is characterized in that built-in pipe (2) and bit body (1) inwall composition annular gap (9), built-in pipe (2) inner arc surface (8) forms annular nozzle (7) with the shoulder (5) of bit body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420394676.9U CN203961805U (en) | 2014-07-17 | 2014-07-17 | A kind of drawing-in type reverse circulation sampling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420394676.9U CN203961805U (en) | 2014-07-17 | 2014-07-17 | A kind of drawing-in type reverse circulation sampling bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203961805U true CN203961805U (en) | 2014-11-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420394676.9U Expired - Fee Related CN203961805U (en) | 2014-07-17 | 2014-07-17 | A kind of drawing-in type reverse circulation sampling bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203961805U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329027A (en) * | 2014-11-03 | 2015-02-04 | 中国石油大学(北京) | Double-wall drill-pipe counterflush drilling jet pump drill bit |
| CN105328506A (en) * | 2015-12-10 | 2016-02-17 | 广西玉柴机器股份有限公司 | Floating oil sucking device for cutting fluid |
| CN106677707A (en) * | 2017-03-22 | 2017-05-17 | 吉林大学 | Air reverse circulation continuous coring ice drill bit |
| CN107829689A (en) * | 2017-11-21 | 2018-03-23 | 中南大学 | Multidirectional injection aeratic hidden hole hammer bit |
| CN110132655A (en) * | 2019-06-11 | 2019-08-16 | 安徽科技学院 | A kind of liquid taking device based on charcoal base soil conditioner quality determination |
| CN112096296A (en) * | 2020-11-12 | 2020-12-18 | 胜利油田固邦石油装备有限责任公司 | PDC drill bit for grinding fin type oil gas drilling |
-
2014
- 2014-07-17 CN CN201420394676.9U patent/CN203961805U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329027A (en) * | 2014-11-03 | 2015-02-04 | 中国石油大学(北京) | Double-wall drill-pipe counterflush drilling jet pump drill bit |
| CN105328506A (en) * | 2015-12-10 | 2016-02-17 | 广西玉柴机器股份有限公司 | Floating oil sucking device for cutting fluid |
| CN106677707A (en) * | 2017-03-22 | 2017-05-17 | 吉林大学 | Air reverse circulation continuous coring ice drill bit |
| CN107829689A (en) * | 2017-11-21 | 2018-03-23 | 中南大学 | Multidirectional injection aeratic hidden hole hammer bit |
| CN107829689B (en) * | 2017-11-21 | 2023-10-31 | 中南大学 | Multidirectional jet pneumatic down-the-hole hammer drill bit |
| CN110132655A (en) * | 2019-06-11 | 2019-08-16 | 安徽科技学院 | A kind of liquid taking device based on charcoal base soil conditioner quality determination |
| CN110132655B (en) * | 2019-06-11 | 2021-07-13 | 安徽科技学院 | Liquid taking device based on carbon-based soil conditioner quality determination |
| CN112096296A (en) * | 2020-11-12 | 2020-12-18 | 胜利油田固邦石油装备有限责任公司 | PDC drill bit for grinding fin type oil gas drilling |
| CN112096296B (en) * | 2020-11-12 | 2021-03-02 | 胜利油田固邦石油装备有限责任公司 | PDC drill bit for grinding fin type oil gas drilling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20160717 |