EP0145422A3 - Improvements in rotary drill bits - Google Patents
Improvements in rotary drill bits Download PDFInfo
- Publication number
- EP0145422A3 EP0145422A3 EP84308323A EP84308323A EP0145422A3 EP 0145422 A3 EP0145422 A3 EP 0145422A3 EP 84308323 A EP84308323 A EP 84308323A EP 84308323 A EP84308323 A EP 84308323A EP 0145422 A3 EP0145422 A3 EP 0145422A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- bit body
- bit
- carrier
- cutting
- cutting elements
- 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.)
- Withdrawn
Links
- 238000005553 drilling Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 abstract 1
- 238000005552 hardfacing Methods 0.000 abstract 1
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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/56—Button-type inserts
- E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
Abstract
A rotary drill bit for use in drilling or coring deep holes
in subsurface formations comprises a bit body (10) having
a shank (11) for connection to a drill string, a plurality of
cutting elements (14) mounted at the surface of the bit body,
and a channel in the bit body for supplying drilling fluid to
nozzles (17) in the surface of the bit body for cooling and/or
cleaning the cutting elements. The cutting elements (14)
each comprise a thin hard facing layer (19), defining a front
cutting face, bonded to a less hard backing layer (20), and
the cutting element is mounted on a carrier (22) which is
received in a socket (23) in the bit body in such manner that,
at least before any wear of the bit has occurred, the carrier
(22) is wholly shrouded by the material of the bit body, the
carrier 22 being formed from material which is less hard
than the backing layer (20) of the cutting element (14).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8332343 | 1983-12-03 | ||
| GB838332343A GB8332343D0 (en) | 1983-12-03 | 1983-12-03 | Rotary drill bits |
| GB848405179A GB8405179D0 (en) | 1984-02-28 | 1984-02-28 | Rotary drill bits |
| GB8405179 | 1984-02-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0145422A2 EP0145422A2 (en) | 1985-06-19 |
| EP0145422A3 true EP0145422A3 (en) | 1986-05-28 |
Family
ID=26287070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84308323A Withdrawn EP0145422A3 (en) | 1983-12-03 | 1984-11-30 | Improvements in rotary drill bits |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0145422A3 (en) |
| AU (1) | AU3592584A (en) |
| BR (1) | BR8406134A (en) |
| GB (1) | GB2151283B (en) |
| NO (1) | NO844770L (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU578637B2 (en) * | 1983-12-03 | 1988-11-03 | N.L. Petroleum Products Ltd. | Rotary drill bits and cutting elements for such bits |
| GB8418481D0 (en) * | 1984-07-19 | 1984-08-22 | Nl Petroleum Prod | Rotary drill bits |
| US4781256A (en) * | 1984-12-14 | 1988-11-01 | Nl Petroleum Products Limited | Cutting structures for rotary drill bits |
| GB8431633D0 (en) * | 1984-12-14 | 1985-01-30 | Nl Petroleum Prod | Cutting structures for rotary drill bits |
| US4694918A (en) * | 1985-04-29 | 1987-09-22 | Smith International, Inc. | Rock bit with diamond tip inserts |
| AU577958B2 (en) * | 1985-08-22 | 1988-10-06 | De Beers Industrial Diamond Division (Proprietary) Limited | Abrasive compact |
| US4730682A (en) * | 1985-12-23 | 1988-03-15 | Ingersoll-Rand Company | Erosion resistant rock drill bit |
| US4719979A (en) * | 1986-03-24 | 1988-01-19 | Smith International, Inc. | Expendable diamond drag bit |
| GB8805789D0 (en) * | 1988-03-11 | 1988-04-13 | Reed Tool Co | Improvements in/relating to cutter assemblies for rotary drill bits |
| US5111895A (en) * | 1988-03-11 | 1992-05-12 | Griffin Nigel D | Cutting elements for rotary drill bits |
| GB2218131B (en) * | 1988-05-06 | 1992-03-25 | Reed Tool Co | Improvements in or relating to rotary drill bits |
| DE69006867T2 (en) * | 1989-02-14 | 1994-10-13 | Camco Drilling Group Ltd | Cutting elements for rotary drill bits. |
| GB2273306B (en) * | 1992-12-10 | 1996-12-18 | Camco Drilling Group Ltd | Improvements in or relating to cutting elements for rotary drill bits |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200159A (en) * | 1977-04-30 | 1980-04-29 | Christensen, Inc. | Cutter head, drill bit and similar drilling tools |
| US4244432A (en) * | 1978-06-08 | 1981-01-13 | Christensen, Inc. | Earth-boring drill bits |
| EP0032428A1 (en) * | 1980-01-10 | 1981-07-22 | Stonehouse U.K. Limited | Rotary drill bits |
| DE3406442A1 (en) * | 1983-02-22 | 1984-08-23 | Nl Industries, Inc., New York, N.Y. | DRILL CHISEL |
-
1984
- 1984-11-27 AU AU35925/84A patent/AU3592584A/en not_active Abandoned
- 1984-11-30 EP EP84308323A patent/EP0145422A3/en not_active Withdrawn
- 1984-11-30 BR BR8406134A patent/BR8406134A/en unknown
- 1984-11-30 NO NO844770A patent/NO844770L/en unknown
- 1984-11-30 GB GB08430291A patent/GB2151283B/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200159A (en) * | 1977-04-30 | 1980-04-29 | Christensen, Inc. | Cutter head, drill bit and similar drilling tools |
| US4244432A (en) * | 1978-06-08 | 1981-01-13 | Christensen, Inc. | Earth-boring drill bits |
| EP0032428A1 (en) * | 1980-01-10 | 1981-07-22 | Stonehouse U.K. Limited | Rotary drill bits |
| DE3406442A1 (en) * | 1983-02-22 | 1984-08-23 | Nl Industries, Inc., New York, N.Y. | DRILL CHISEL |
Also Published As
| Publication number | Publication date |
|---|---|
| AU3592584A (en) | 1985-06-06 |
| NO844770L (en) | 1985-06-04 |
| GB2151283A (en) | 1985-07-17 |
| GB8430291D0 (en) | 1985-01-09 |
| EP0145422A2 (en) | 1985-06-19 |
| GB2151283B (en) | 1987-04-08 |
| BR8406134A (en) | 1985-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4872520A (en) | Flat bottom drilling bit with polycrystalline cutters | |
| EP0542237B1 (en) | Drill bit cutter and method for reducing pressure loading of cuttings | |
| EP0314953B1 (en) | Improvements in or relating to rotary drill bits | |
| CA1319676C (en) | Rotary drill bit | |
| WO1997030264A3 (en) | Predominantly diamond cutting structures for earth boring | |
| US4553615A (en) | Rotary drilling bits | |
| EP0145422A3 (en) | Improvements in rotary drill bits | |
| US4511006A (en) | Drill bit and method of use thereof | |
| EP0872624A3 (en) | Improvements in or relating to rotary drill bits | |
| SE8701239L (en) | Rotating drill bits | |
| CA2140828C (en) | Compound diamond cutter | |
| EP0155026B1 (en) | Rotary drill bit with cutting elements having a thin abrasive front layer | |
| EP0874127A3 (en) | Rotary drill bits with blades and nozzles | |
| EP0841463A3 (en) | Preform cutting element for rotary drill bits | |
| ES2000737A6 (en) | Cutting means for drag drill bits | |
| WO2004106693A3 (en) | Method and appartus for cutting earthen formations | |
| EP0872625A3 (en) | Rotary drill bits with nozzles | |
| AU2003259458A1 (en) | Tool insert | |
| AU2048297A (en) | Rock drill bit and a rock drilling tool | |
| EP0269400A3 (en) | Improvements in or relating to rotary drill bits | |
| GB2253642A (en) | Patterned hardfacing shapes on insert cutter cones | |
| EP0916803A3 (en) | Rotary drill bit for casing milling and formation drilling | |
| IE851725L (en) | Oxadiazolyl imidazobenzodiazepines | |
| EP0140676B1 (en) | Improvements in or relating to rotary drill bits | |
| IE860437L (en) | "Rotary drill bits and methods of manufacturing such bits" |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): BE CH DE FR LI NL SE |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): BE CH DE FR LI NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19870129 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: WARDLEY, MICHAEL THOMAS Inventor name: BARR, JOHN DENZIL |