CH592843A5
(it)
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1976-01-30 |
1977-11-15 |
Sulzer Ag |
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US4109737A
(en)
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1976-06-24 |
1978-08-29 |
General Electric Company |
Rotary drill bit
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USRE32036E
(en)
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1980-06-11 |
1985-11-26 |
Strata Bit Corporation |
Drill bit
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US4660659A
(en)
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1983-02-22 |
1987-04-28 |
Nl Industries, Inc. |
Drag type drill bit
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US4593777A
(en)
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1983-02-22 |
1986-06-10 |
Nl Industries, Inc. |
Drag bit and cutters
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US4558753A
(en)
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1983-02-22 |
1985-12-17 |
Nl Industries, Inc. |
Drag bit and cutters
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AU578637B2
(en)
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1983-12-03 |
1988-11-03 |
N.L. Petroleum Products Ltd. |
Rotary drill bits and cutting elements for such bits
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US4525178A
(en)
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1984-04-16 |
1985-06-25 |
Megadiamond Industries, Inc. |
Composite polycrystalline diamond
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US4764434A
(en)
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1987-06-26 |
1988-08-16 |
Sandvik Aktiebolag |
Diamond tools for rock drilling and machining
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US4811801A
(en)
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1988-03-16 |
1989-03-14 |
Smith International, Inc. |
Rock bits and inserts therefor
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DE68905106T2
(de)
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1988-06-28 |
1993-09-02 |
Camco Drilling Group Ltd |
Schneidelemente fuer drehbohrmeissel.
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US4858707A
(en)
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1988-07-19 |
1989-08-22 |
Smith International, Inc. |
Convex shaped diamond cutting elements
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DE68919454T2
(de)
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1988-08-15 |
1995-04-06 |
De Beers Ind Diamond |
Werkzeugeinsatz.
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NO169735C
(no)
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1989-01-26 |
1992-07-29 |
Geir Tandberg |
Kombinasjonsborekrone
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(en)
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1989-05-26 |
1992-10-27 |
Smith International, Inc. |
Diamond-containing cemented metal carbide
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(en)
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1990-04-19 |
1992-10-13 |
Sandvik Ab |
Diamond rock tools for percussive and rotary crushing rock drilling
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SE9002135D0
(sv)
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1990-06-15 |
1990-06-15 |
Sandvik Ab |
Improved tools for percussive and rotary crusching rock drilling provided with a diamond layer
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JP3083540B2
(ja)
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1990-08-20 |
2000-09-04 |
株式会社東芝 |
マルチプロセッサを用いた交換制御方式
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(en)
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1991-03-01 |
1993-12-28 |
Baker Hughes Incorporated |
Fixed cutter bit with improved diamond filled compacts
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(en)
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1991-03-01 |
1993-09-28 |
Baker Hughes Incorporated |
Rotary rock bit with improved diamond-filled compacts
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(en)
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1991-03-05 |
1992-06-09 |
Diamant-Boart Stratabit (Usa) Inc. |
Cutting composite formed of cemented carbide substrate and diamond layer
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US5890552A
(en)
*
|
1992-01-31 |
1999-04-06 |
Baker Hughes Incorporated |
Superabrasive-tipped inserts for earth-boring drill bits
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US5437343A
(en)
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1992-06-05 |
1995-08-01 |
Baker Hughes Incorporated |
Diamond cutters having modified cutting edge geometry and drill bit mounting arrangement therefor
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US5304342A
(en)
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1992-06-11 |
1994-04-19 |
Hall Jr H Tracy |
Carbide/metal composite material and a process therefor
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AU670642B2
(en)
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1992-12-23 |
1996-07-25 |
De Beers Industrial Diamond Division (Proprietary) Limited |
Tool component
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US5351772A
(en)
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1993-02-10 |
1994-10-04 |
Baker Hughes, Incorporated |
Polycrystalline diamond cutting element
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US5355969A
(en)
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1993-03-22 |
1994-10-18 |
U.S. Synthetic Corporation |
Composite polycrystalline cutting element with improved fracture and delamination resistance
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US5460233A
(en)
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1993-03-30 |
1995-10-24 |
Baker Hughes Incorporated |
Diamond cutting structure for drilling hard subterranean formations
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US5494477A
(en)
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1993-08-11 |
1996-02-27 |
General Electric Company |
Abrasive tool insert
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(en)
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1993-07-21 |
1996-01-23 |
General Electric Company |
Abrasive tool insert
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(en)
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1993-07-21 |
1996-01-16 |
General Electric Company |
Abrasive tool insert
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US5379854A
(en)
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1993-08-17 |
1995-01-10 |
Dennis Tool Company |
Cutting element for drill bits
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EP0655549B1
(en)
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1993-11-10 |
1999-02-10 |
Camco Drilling Group Limited |
Improvements in or relating to elements faced with superhard material
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US5435403A
(en)
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1993-12-09 |
1995-07-25 |
Baker Hughes Incorporated |
Cutting elements with enhanced stiffness and arrangements thereof on earth boring drill bits
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US5590729A
(en)
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1993-12-09 |
1997-01-07 |
Baker Hughes Incorporated |
Superhard cutting structures for earth boring with enhanced stiffness and heat transfer capabilities
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US5605198A
(en)
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1993-12-09 |
1997-02-25 |
Baker Hughes Incorporated |
Stress related placement of engineered superabrasive cutting elements on rotary drag bits
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GB9412247D0
(en)
|
1994-06-18 |
1994-08-10 |
Camco Drilling Group Ltd |
Improvements in or relating to elements faced with superhard material
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GB9412779D0
(en)
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1994-06-24 |
1994-08-17 |
Camco Drilling Group Ltd |
Improvements in or relating to elements faced with superhard materials
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DE69531277T2
(de)
|
1994-10-15 |
2004-05-19 |
Camco Drilling Group Ltd., Stonehouse |
Drehbohrmeissel
|
GB9506079D0
(en)
*
|
1995-03-24 |
1995-05-10 |
Camco Drilling Group Ltd |
Improvements in or relating to elements faced with superhard material
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US5709279A
(en)
|
1995-05-18 |
1998-01-20 |
Dennis; Mahlon Denton |
Drill bit insert with sinusoidal interface
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FR2735522B1
(fr)
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1995-06-16 |
1997-09-05 |
Total Sa |
Taillant d'outil de forage monobloc
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(en)
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1995-07-03 |
1996-10-22 |
Dennis Tool Company |
Insert for a drill bit incorporating a PDC layer having extended side portions
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(en)
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1996-01-26 |
1997-07-15 |
Dennis; Mahlon |
Crowned surface with PDC layer
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US5706906A
(en)
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1996-02-15 |
1998-01-13 |
Baker Hughes Incorporated |
Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped
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US6571891B1
(en)
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1996-04-17 |
2003-06-03 |
Baker Hughes Incorporated |
Web cutter
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(en)
*
|
1996-04-17 |
1998-06-02 |
Baker Hughes Incorporated |
Earth-boring bit with super-hard cutting elements
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US6068071A
(en)
*
|
1996-05-23 |
2000-05-30 |
U.S. Synthetic Corporation |
Cutter with polycrystalline diamond layer and conic section profile
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US5906246A
(en)
*
|
1996-06-13 |
1999-05-25 |
Smith International, Inc. |
PDC cutter element having improved substrate configuration
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GB2316698B
(en)
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1996-08-26 |
2000-10-18 |
Smith International |
PDC cutter element having improved substrate configuration
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US5711702A
(en)
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1996-08-27 |
1998-01-27 |
Tempo Technology Corporation |
Curve cutter with non-planar interface
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GB9621217D0
(en)
*
|
1996-10-11 |
1996-11-27 |
Camco Drilling Group Ltd |
Improvements in or relating to preform cutting elements for rotary drill bits
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US6041875A
(en)
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1996-12-06 |
2000-03-28 |
Smith International, Inc. |
Non-planar interfaces for cutting elements
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US5967249A
(en)
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1997-02-03 |
1999-10-19 |
Baker Hughes Incorporated |
Superabrasive cutters with structure aligned to loading and method of drilling
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US5871060A
(en)
*
|
1997-02-20 |
1999-02-16 |
Jensen; Kenneth M. |
Attachment geometry for non-planar drill inserts
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US6082474A
(en)
*
|
1997-07-26 |
2000-07-04 |
Camco International Limited |
Elements faced with superhard material
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US5928071A
(en)
*
|
1997-09-02 |
1999-07-27 |
Tempo Technology Corporation |
Abrasive cutting element with increased performance
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US6202771B1
(en)
*
|
1997-09-23 |
2001-03-20 |
Baker Hughes Incorporated |
Cutting element with controlled superabrasive contact area, drill bits so equipped
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US6196340B1
(en)
*
|
1997-11-28 |
2001-03-06 |
U.S. Synthetic Corporation |
Surface geometry for non-planar drill inserts
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US6199645B1
(en)
*
|
1998-02-13 |
2001-03-13 |
Smith International, Inc. |
Engineered enhanced inserts for rock drilling bits
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US5887580A
(en)
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1998-03-25 |
1999-03-30 |
Smith International, Inc. |
Cutting element with interlocking feature
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US6026919A
(en)
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1998-04-16 |
2000-02-22 |
Diamond Products International Inc. |
Cutting element with stress reduction
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US6315067B1
(en)
*
|
1998-04-16 |
2001-11-13 |
Diamond Products International, Inc. |
Cutting element with stress reduction
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US6003623A
(en)
*
|
1998-04-24 |
1999-12-21 |
Dresser Industries, Inc. |
Cutters and bits for terrestrial boring
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US5971087A
(en)
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1998-05-20 |
1999-10-26 |
Baker Hughes Incorporated |
Reduced residual tensile stress superabrasive cutters for earth boring and drill bits so equipped
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US6527069B1
(en)
|
1998-06-25 |
2003-03-04 |
Baker Hughes Incorporated |
Superabrasive cutter having optimized table thickness and arcuate table-to-substrate interfaces
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US6189634B1
(en)
*
|
1998-09-18 |
2001-02-20 |
U.S. Synthetic Corporation |
Polycrystalline diamond compact cutter having a stress mitigating hoop at the periphery
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US6227319B1
(en)
*
|
1999-07-01 |
2001-05-08 |
Baker Hughes Incorporated |
Superabrasive cutting elements and drill bit so equipped
|