GB1537000A
(en)
*
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1977-08-17 |
1978-12-29 |
Shell Int Research |
Rotary drilling bit
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US4351401A
(en)
*
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1978-06-08 |
1982-09-28 |
Christensen, Inc. |
Earth-boring drill bits
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US4246977A
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*
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1979-04-09 |
1981-01-27 |
Smith International, Inc. |
Diamond studded insert drag bit with strategically located hydraulic passages for mud motors
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DE2917664C2
(de)
*
|
1979-05-02 |
1982-12-09 |
Christensen, Inc., 84115 Salt Lake City, Utah |
Drehbohrmeißel für Tiefbohrungen
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US4360069A
(en)
*
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1980-07-21 |
1982-11-23 |
Kenneth Davis |
Diamond drill bits
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DE3039633C2
(de)
*
|
1980-10-21 |
1983-08-18 |
Christensen, Inc., 84115 Salt Lake City, Utah |
Drehbohrmeißel, insbesondere für Tiefbohrungen
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DE3039632C2
(de)
*
|
1980-10-21 |
1982-12-16 |
Christensen, Inc., 84115 Salt Lake City, Utah |
Drehborhmeißel für Tiefbohrungen
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EP0058061A3
(fr)
*
|
1981-02-07 |
1982-09-01 |
DRILLING & SERVICE U.K. LIMITED |
Outil de forage pour formation souterraine
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DE3113109C2
(de)
*
|
1981-04-01 |
1983-11-17 |
Christensen, Inc., 84115 Salt Lake City, Utah |
Drehbohrmeißel für Tiefbohrungen
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FR2504589A1
(fr)
*
|
1981-04-24 |
1982-10-29 |
Vennin Henri |
Outil de forage monobloc rotatif comportant des elements de coupe diamantes et des buses
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US4453605A
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*
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1981-04-30 |
1984-06-12 |
Nl Industries, Inc. |
Drill bit and method of metallurgical and mechanical holding of cutters in a drill bit
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US4460053A
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*
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1981-08-14 |
1984-07-17 |
Christensen, Inc. |
Drill tool for deep wells
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CA1217475A
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*
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1982-09-16 |
1987-02-03 |
John D. Barr |
Trepan de forage
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US4478297A
(en)
*
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1982-09-30 |
1984-10-23 |
Strata Bit Corporation |
Drill bit having cutting elements with heat removal cores
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US4505342A
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*
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1982-11-22 |
1985-03-19 |
Nl Industries, Inc. |
Drill bit
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US4676324A
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*
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1982-11-22 |
1987-06-30 |
Nl Industries, Inc. |
Drill bit and cutter therefor
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US4632196A
(en)
*
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1983-02-18 |
1986-12-30 |
Strata Bit Corporation |
Drill bit with shrouded cutter
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US4724913A
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*
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1983-02-18 |
1988-02-16 |
Strata Bit Corporation |
Drill bit and improved cutting element
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US4499795A
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*
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1983-09-23 |
1985-02-19 |
Strata Bit Corporation |
Method of drill bit manufacture
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FR2558891B1
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*
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1984-02-01 |
1986-11-07 |
Charbonnages De France |
Taillant de foration rotative assistee par jets haute pression
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US4602691A
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*
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1984-06-07 |
1986-07-29 |
Hughes Tool Company |
Diamond drill bit with varied cutting elements
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USRE33757E
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*
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1984-06-07 |
1991-12-03 |
Dresser Industries, Inc. |
Diamond drill bit with varied cutting elements
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*
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1985-08-02 |
1987-06-16 |
Eastman Christensen Co. |
Earth boring bit for soft to hard formations
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GB8528299D0
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*
|
1985-11-16 |
1985-12-18 |
Nl Petroleum Prod |
Rotary drill bits
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US4655303A
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*
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1985-11-22 |
1987-04-07 |
Amoco Corporation |
Drill bit
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(en)
*
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1986-01-16 |
1987-11-03 |
Hughes Tool Company - Usa |
Earth boring bit having a replaceable, threaded nozzle with wrench socket
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US4714120A
(en)
*
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1986-01-29 |
1987-12-22 |
Hughes Tool Company |
Diamond drill bit with co-joined cutters
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US4662896A
(en)
*
|
1986-02-19 |
1987-05-05 |
Strata Bit Corporation |
Method of making an abrasive cutting element
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GB8607701D0
(en)
*
|
1986-03-27 |
1986-04-30 |
Shell Int Research |
Rotary drill bit
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JPS63134782A
(ja)
*
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1986-09-11 |
1988-06-07 |
イーストマン クリステンセン カンパニー |
各カッタに対して指向性を有する水流を供給するコンパクトな大型カッタを具えた回転型ドリルビット
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US4913244A
(en)
*
|
1986-09-11 |
1990-04-03 |
Eastman Christensen Company |
Large compact cutter rotary drill bit utilizing directed hydraulics for each cutter
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US4883136A
(en)
*
|
1986-09-11 |
1989-11-28 |
Eastman Christensen Co. |
Large compact cutter rotary drill bit utilizing directed hydraulics for each cutter
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FR2627541B2
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*
|
1986-11-04 |
1991-04-05 |
Vennin Henri |
Outil de forage monobloc rotatif
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FR2606069B1
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*
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1986-11-04 |
1991-01-18 |
Vennin Henri |
Outil de forage monobloc rotatif
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GB8626919D0
(en)
*
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1986-11-11 |
1986-12-10 |
Nl Petroleum Prod |
Rotary drill bits
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US5115873A
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*
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1991-01-24 |
1992-05-26 |
Baker Hughes Incorporated |
Method and appartus for directing drilling fluid to the cutting edge of a cutter
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1991-11-14 |
1992-12-22 |
Baker-Hughes, Inc. |
Drill bit cutter and method for reducing pressure loading of cutters
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DE9308444U1
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*
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1993-06-05 |
1993-08-19 |
Bilfinger + Berger Bauaktiengesellschaft, 68165 Mannheim |
Bohrkrone für Bohrungen in Bohrgrund mit drückendem Wasser
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GB9509555D0
(en)
*
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1995-05-11 |
1995-07-05 |
Camco Drilling Group Ltd |
Improvements in or relating to rotary drill bits
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US5904213A
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1995-10-10 |
1999-05-18 |
Camco International (Uk) Limited |
Rotary drill bits
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US6123160A
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1997-04-02 |
2000-09-26 |
Baker Hughes Incorporated |
Drill bit with gage definition region
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US6206117B1
(en)
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1997-04-02 |
2001-03-27 |
Baker Hughes Incorporated |
Drilling structure with non-axial gage
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US6125947A
(en)
|
1997-09-19 |
2000-10-03 |
Baker Hughes Incorporated |
Earth-boring drill bits with enhanced formation cuttings removal features and methods of drilling
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US6860344B2
(en)
*
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2001-06-25 |
2005-03-01 |
Kennametal Inc. |
Monolithic roof cutting bit insert
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WO2003031763A1
(fr)
*
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2001-10-03 |
2003-04-17 |
Shell Internationale Research Maatschappij B.V. |
Systeme de forage par rotopercussion dans une formation geologique
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*
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2005-11-10 |
2010-10-05 |
Baker Hughes Incorporated |
Method for forming earth-boring tools comprising silicon carbide composite materials
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*
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2006-08-11 |
2011-02-15 |
Schlumberger Technology Corporation |
Drill bit nozzle
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US7527110B2
(en)
*
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2006-10-13 |
2009-05-05 |
Hall David R |
Percussive drill bit
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US9103170B2
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*
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2008-05-16 |
2015-08-11 |
Smith International, Inc. |
Impregnated drill bit
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NL2003908C2
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*
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2009-12-04 |
2011-06-07 |
Pmm Hoff Holding Bv |
A method of planting a seed, plant, bush or tree, and a drill.
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(en)
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2013-02-01 |
2022-10-18 |
Global Polishing Systems, Llc |
Tools for polishing and refinishing concrete and methods for using the same
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PL2950976T3
(pl)
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2013-02-01 |
2018-06-29 |
Global Polishing Systems LLC |
Roztwory do cięcia, polerowania i obróbki barwiącej betonu
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WO2014197761A1
(fr)
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2013-06-06 |
2014-12-11 |
Milwaukee Electric Tool Corporation |
Foret étagé
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*
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2014-07-17 |
2017-04-18 |
First Corp International Inc. |
Hole opener and method for drilling
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US11273501B2
(en)
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2018-04-26 |
2022-03-15 |
Milwaukee Electric Tool Corporation |
Step drill bit
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