CN1317479C - Composite conic single gear drill bit - Google Patents
Composite conic single gear drill bit Download PDFInfo
- Publication number
- CN1317479C CN1317479C CNB021157529A CN02115752A CN1317479C CN 1317479 C CN1317479 C CN 1317479C CN B021157529 A CNB021157529 A CN B021157529A CN 02115752 A CN02115752 A CN 02115752A CN 1317479 C CN1317479 C CN 1317479C
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- CN
- China
- Prior art keywords
- cone
- bit
- roller
- long back
- composite conic
- Prior art date
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Abstract
The present invention relates to a combination cone single-roller bit which belongs to the field of petroleum, mine and geological drilling. The present invention comprises a bit leg and a roller arranged on the lower end of the bit leg and is characterized in that the peripherical surface of the roller is formed by the combination of a super-long back cone surface, an outer cone surface and a main cone surface from top to bottom to cause the roller to be in a composite cone shape. Cutting teeth are embedded in the surface of each cone. The main cone surface is a negative cone surface, and the back slope angle beta of the super-long back cone surface is 30 to 80 DEG. The vertical height of the super-long back cone surface is 20 to 80% of the height of the roller. During drilling, the present invention can reduce the cutting tooth number of the single-roller bit instantaneously contacting the shaft bottom and simultaneously shorten the sliding stroke of each cutting tooth on a rock layer to cause the single-roller bit to have the rock drilling characteristics of impact, crush and squeeze in the small distance. The shaft bottom pattern of an approximate parabola is formed, and accordingly, the rock drilling performance of the single-roller bit is improved. The use and footage effect of the single-roller bit in the stratum layer of medium rigidity, and the composite cost of the well drilling is lowered.
Description
Technical field
The present invention relates to a kind of single-cone rotary drill bit that is used for oil, mine and geological drilling field, relate to a kind of single-cone rotary drill bit of composite conic particularly.
Background technology
Single-cone rotary drill bit mainly is made of bit leg and gear wheel, existing gear wheel contour structures mostly is sphere or ladder sphere, is installed with cutting teeth on spherical, and the single cone of this structure bores and is full well drill bit, mainly with the broken rock of cutting way, formation has the bottom hole pattern of netted Cutting trajectory.In this cutting way, the cutting teeth that contacts the shaft bottom simultaneously is many, and time of contact is long, the drill bit stable working.The single-cone rotary drill bit of this cone structure applicability in soft-medium hard formation is strong, and result of use is better.But, in hard formation, the single-cone rotary drill bit of this full well pattern, cutting teeth (tooth) quick abrasion, result of use is relatively poor.Studies show that the common drill bit that uses need possess impact, crushing and small distance and scrape crowded broken rock feature, just has result of use preferably in hard formation.
Summary of the invention
Purpose of the present invention is intended to design a kind of composite conic single gear drill bit, makes rock bit possess impact, crushing and small distance and scrapes crowded broken rock feature.
Purpose of the present invention is realized by following technical scheme:
Comprise bit leg 1 and the gear wheel 2 that is installed in the bit leg lower end, its difference is that the outer peripheral face of gear wheel is combined by long back cone 6, male cone (strobilus masculinus) 5 and main cone face 4 from top to bottom, makes gear wheel be composite conic, is installed with cutting teeth 3 on each conical surface.
Press such scheme, described main cone face 4 is the negative conical surface, i.e. angle α≤90 of main cone face bus and gear wheel centre of gyration line °, the back of the body angle of inclination beta=30-80 of long back cone °; The vertical height of long back cone is the 20-80% of gear wheel height, is generally 40-80%.
Beneficial effect of the present invention is: the single cone cutting structure that is made of the gear wheel cloth tooth of the compound conical surface, can reduce the cutting number of teeth in the instantaneous contact of single-cone rotary drill bit shaft bottom during drilling well, shorten the stroke of every cutting teeth slippage on the rock stratum simultaneously, make single-cone rotary drill bit have impact, crushing and small distance and scrape crowded broken rock feature, and the approximate parabolical bottom hole pattern of formation, thereby improved the impact cutting lithology energy of single-cone rotary drill bit, make single-cone rotary drill bit in be improved significantly with use in the overlying strata and drilling depth effect firmly, reduced the integrated cost of drilling well.
Description of drawings
Fig. 1 is the elevation of one embodiment of the invention.
Fig. 2 is the stereogram of gear wheel in the one embodiment of the invention.
Fig. 3 is the positive view of gear wheel in the one embodiment of the invention.
The specific embodiment
Further specify embodiments of the invention below in conjunction with accompanying drawing, single-cone rotary drill bit includes bit leg 1 and gear wheel 2, the outer peripheral face of gear wheel is by the long back cone 6 of side direction, the downward male cone (strobilus masculinus) 5 and the main cone face 4 of lower end combine, long back cone can be stepped, constitute the gear wheel of composite conic, wherein the back of the body angle of inclination beta of long back cone is 40-45 °, the main cone face is the negative conical surface, angle α=80 of its bus and gear wheel center line °, long back cone, the bus of male cone (strobilus masculinus) and main cone face can be straight line or curve, long back cone at gear wheel, all be drilled with perforation 8 on male cone (strobilus masculinus) and the main cone face, be installed with cutting teeth (tooth) 3 in the perforation, be installed with the cutting teeth of many rows of mutually staggered on the long back cone, cutting teeth is a blunt conical-ended shape insert.Gear wheel links with bit leg journel by its dead eye 7, and can there be a skew in the bit leg journel center line with the bit leg centreline space, with the impact cutting lithology energy of further raising rock bit.
Claims (7)
1, a kind of composite conic single gear drill bit, comprise bit leg (1) and be installed in the gear wheel (2) of bit leg lower end, the outer peripheral face that it is characterized in that gear wheel is combined by long back cone (6), male cone (strobilus masculinus) (5) and main cone face (4) from top to bottom, make gear wheel be composite conic, on each conical surface, be installed with cutting teeth (3).
2,, it is characterized in that described main cone face (4) is the negative conical surface, i.e. angle α≤90 of main cone face bus and gear wheel centre of gyration line ° by the described composite conic single gear drill bit of claim 1.
3,, it is characterized in that back of the body inclination angle=30-80 ° of long back cone (6) by claim 1 or 2 described composite conic single gear drill bits.
4, by claim 1 or 2 described composite conic single gear drill bits, the vertical height that it is characterized in that long back cone (6) is the 20-80% of gear wheel height, and long back cone can be stepped.
5,, it is characterized in that being installed with on the long back cone cutting teeth of many rows of mutually staggered by claim 1 or 2 described composite conic single gear drill bits.
6, by claim 1 or 2 described composite conic single gear drill bits, the bus that it is characterized in that long back cone, male cone (strobilus masculinus) and main cone face is straight line or curve.
7,, it is characterized in that can there be a skew in the bit leg journel center line with the bit leg centreline space by claim 1 or 2 described composite conic single gear drill bits.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021157529A CN1317479C (en) | 2002-04-23 | 2002-04-23 | Composite conic single gear drill bit |
| AU2003221233A AU2003221233A1 (en) | 2002-04-23 | 2003-03-26 | A roller bit with a journal pin offset from the central axis thereof |
| RU2004126429/03A RU2280143C2 (en) | 2002-04-23 | 2003-03-26 | One-cutter rock drilling bit |
| PCT/CN2003/000220 WO2003091531A1 (en) | 2002-04-23 | 2003-03-26 | A roller bit with a journal pin offset from the central axis thereof |
| US10/512,399 US7299887B2 (en) | 2002-04-23 | 2003-03-26 | Roller bit with a journal pin offset from the central axis thereof |
| CA002477576A CA2477576C (en) | 2002-04-23 | 2003-03-26 | A single cone bit with offset axis and composite cones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021157529A CN1317479C (en) | 2002-04-23 | 2002-04-23 | Composite conic single gear drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1375614A CN1375614A (en) | 2002-10-23 |
| CN1317479C true CN1317479C (en) | 2007-05-23 |
Family
ID=4743845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021157529A Expired - Fee Related CN1317479C (en) | 2002-04-23 | 2002-04-23 | Composite conic single gear drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1317479C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0808366D0 (en) * | 2008-05-09 | 2008-06-18 | Element Six Ltd | Attachable wear resistant percussive drilling head |
| CN103541660B (en) * | 2013-11-07 | 2016-08-17 | 西南石油大学 | A kind of composite type eccentric one-cone bit |
| CN109854178B (en) * | 2019-03-27 | 2020-12-22 | 山东易斯特工程工具有限公司 | Roller bit for rotary drilling rig |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2285818Y (en) * | 1996-11-21 | 1998-07-08 | 黄万志 | Impact press-in single roller bit |
| RU2142549C1 (en) * | 1998-01-12 | 1999-12-10 | Открытое Акционерное общество "Татнефть" Татарский научно-исследовательский и проектный институт нефти | Single-roller bit |
| CN2542819Y (en) * | 2002-04-23 | 2003-04-02 | 江汉石油钻头股份有限公司 | Combination cone single-roller bit |
-
2002
- 2002-04-23 CN CNB021157529A patent/CN1317479C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2285818Y (en) * | 1996-11-21 | 1998-07-08 | 黄万志 | Impact press-in single roller bit |
| RU2142549C1 (en) * | 1998-01-12 | 1999-12-10 | Открытое Акционерное общество "Татнефть" Татарский научно-исследовательский и проектный институт нефти | Single-roller bit |
| CN2542819Y (en) * | 2002-04-23 | 2003-04-02 | 江汉石油钻头股份有限公司 | Combination cone single-roller bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1375614A (en) | 2002-10-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070523 Termination date: 20160423 |
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| CF01 | Termination of patent right due to non-payment of annual fee |