US5467836A
(en)
*
|
1992-01-31 |
1995-11-21 |
Baker Hughes Incorporated |
Fixed cutter bit with shear cutting gage
|
US5201376A
(en)
*
|
1992-04-22 |
1993-04-13 |
Dresser Industries, Inc. |
Rock bit with improved gage insert
|
US5341890A
(en)
*
|
1993-01-08 |
1994-08-30 |
Smith International, Inc. |
Ultra hard insert cutters for heel row rotary cone rock bit applications
|
US5351769A
(en)
*
|
1993-06-14 |
1994-10-04 |
Baker Hughes Incorporated |
Earth-boring bit having an improved hard-faced tooth structure
|
US5351770A
(en)
*
|
1993-06-15 |
1994-10-04 |
Smith International, Inc. |
Ultra hard insert cutters for heel row rotary cone rock bit applications
|
US5542485A
(en)
*
|
1993-07-08 |
1996-08-06 |
Baker Hughes Incorporated |
Earth-boring bit with improved cutting structure
|
US5819861A
(en)
*
|
1993-07-08 |
1998-10-13 |
Baker Hughes Incorporated |
Earth-boring bit with improved cutting structure
|
US5407022A
(en)
*
|
1993-11-24 |
1995-04-18 |
Baker Hughes Incorporated |
Free cutting gage insert with relief angle
|
US5452771A
(en)
*
|
1994-03-31 |
1995-09-26 |
Dresser Industries, Inc. |
Rotary drill bit with improved cutter and seal protection
|
US5429200A
(en)
*
|
1994-03-31 |
1995-07-04 |
Dresser Industries, Inc. |
Rotary drill bit with improved cutter
|
US5513715A
(en)
*
|
1994-08-31 |
1996-05-07 |
Dresser Industries, Inc. |
Flat seal for a roller cone rock bit
|
US5441120A
(en)
*
|
1994-08-31 |
1995-08-15 |
Dresser Industries, Inc. |
Roller cone rock bit having a sealing system with double elastomer seals
|
US5513711A
(en)
*
|
1994-08-31 |
1996-05-07 |
Williams; Mark E. |
Sealed and lubricated rotary cone drill bit having improved seal protection
|
US5615747A
(en)
*
|
1994-09-07 |
1997-04-01 |
Vail, Iii; William B. |
Monolithic self sharpening rotary drill bit having tungsten carbide rods cast in steel alloys
|
US6547017B1
(en)
|
1994-09-07 |
2003-04-15 |
Smart Drilling And Completion, Inc. |
Rotary drill bit compensating for changes in hardness of geological formations
|
US5636700A
(en)
|
1995-01-03 |
1997-06-10 |
Dresser Industries, Inc. |
Roller cone rock bit having improved cutter gauge face surface compacts and a method of construction
|
US5579856A
(en)
*
|
1995-06-05 |
1996-12-03 |
Dresser Industries, Inc. |
Gage surface and method for milled tooth cutting structure
|
US5755299A
(en)
*
|
1995-08-03 |
1998-05-26 |
Dresser Industries, Inc. |
Hardfacing with coated diamond particles
|
US5695019A
(en)
*
|
1995-08-23 |
1997-12-09 |
Dresser Industries, Inc. |
Rotary cone drill bit with truncated rolling cone cutters and dome area cutter inserts
|
US5709278A
(en)
|
1996-01-22 |
1998-01-20 |
Dresser Industries, Inc. |
Rotary cone drill bit with contoured inserts and compacts
|
US5722497A
(en)
|
1996-03-21 |
1998-03-03 |
Dresser Industries, Inc. |
Roller cone gage surface cutting elements with multiple ultra hard cutting surfaces
|
US5813485A
(en)
*
|
1996-06-21 |
1998-09-29 |
Smith International, Inc. |
Cutter element adapted to withstand tensile stress
|
US5791423A
(en)
*
|
1996-08-02 |
1998-08-11 |
Baker Hughes Incorporated |
Earth-boring bit having an improved hard-faced tooth structure
|
US6029759A
(en)
*
|
1997-04-04 |
2000-02-29 |
Smith International, Inc. |
Hardfacing on steel tooth cutter element
|
US5839526A
(en)
*
|
1997-04-04 |
1998-11-24 |
Smith International, Inc. |
Rolling cone steel tooth bit with enhancements in cutter shape and placement
|
US5868213A
(en)
*
|
1997-04-04 |
1999-02-09 |
Smith International, Inc. |
Steel tooth cutter element with gage facing knee
|
US6138779A
(en)
*
|
1998-01-16 |
2000-10-31 |
Dresser Industries, Inc. |
Hardfacing having coated ceramic particles or coated particles of other hard materials placed on a rotary cone cutter
|
US6170583B1
(en)
|
1998-01-16 |
2001-01-09 |
Dresser Industries, Inc. |
Inserts and compacts having coated or encrusted cubic boron nitride particles
|
US6102140A
(en)
*
|
1998-01-16 |
2000-08-15 |
Dresser Industries, Inc. |
Inserts and compacts having coated or encrusted diamond particles
|
US5979575A
(en)
*
|
1998-06-25 |
1999-11-09 |
Baker Hughes Incorporated |
Hybrid rock bit
|
US6206116B1
(en)
|
1998-07-13 |
2001-03-27 |
Dresser Industries, Inc. |
Rotary cone drill bit with machined cutting structure
|
US7334652B2
(en)
*
|
1998-08-31 |
2008-02-26 |
Halliburton Energy Services, Inc. |
Roller cone drill bits with enhanced cutting elements and cutting structures
|
US6241035B1
(en)
|
1998-12-07 |
2001-06-05 |
Smith International, Inc. |
Superhard material enhanced inserts for earth-boring bits
|
US6227318B1
(en)
|
1998-12-07 |
2001-05-08 |
Smith International, Inc. |
Superhard material enhanced inserts for earth-boring bits
|
US6290008B1
(en)
|
1998-12-07 |
2001-09-18 |
Smith International, Inc. |
Inserts for earth-boring bits
|
US6186250B1
(en)
|
1999-04-01 |
2001-02-13 |
Rock Bit International, Inc. |
Sharp gage for mill tooth rockbits
|
US6360832B1
(en)
*
|
2000-01-03 |
2002-03-26 |
Baker Hughes Incorporated |
Hardfacing with multiple grade layers
|
US6615936B1
(en)
|
2000-04-19 |
2003-09-09 |
Smith International, Inc. |
Method for applying hardfacing to a substrate and its application to construction of milled tooth drill bits
|
CA2348188C
(en)
*
|
2000-05-18 |
2006-08-01 |
Smith International, Inc. |
Rolling cone bit with elements fanned along the gage curve
|
CN1174158C
(zh)
*
|
2000-06-29 |
2004-11-03 |
江汉石油钻头股份有限公司 |
一种具有并列镶齿的牙轮钻头
|
US6766870B2
(en)
*
|
2002-08-21 |
2004-07-27 |
Baker Hughes Incorporated |
Mechanically shaped hardfacing cutting/wear structures
|
US6923276B2
(en)
*
|
2003-02-19 |
2005-08-02 |
Baker Hughes Incorporated |
Streamlined mill-toothed cone for earth boring bit
|
GB2420433B
(en)
*
|
2004-03-02 |
2012-02-22 |
Halliburton Energy Serv Inc |
Computer-implemented method to design a roller cone drill bit
|
US7434632B2
(en)
|
2004-03-02 |
2008-10-14 |
Halliburton Energy Services, Inc. |
Roller cone drill bits with enhanced drilling stability and extended life of associated bearings and seals
|
GB2417966A
(en)
*
|
2004-08-16 |
2006-03-15 |
Halliburton Energy Serv Inc |
Roller cone drill bits with optimized bearing structure
|
US7377340B2
(en)
*
|
2004-10-29 |
2008-05-27 |
Smith International, Inc. |
Drill bit cutting elements with selectively positioned wear resistant surface
|
US20090229888A1
(en)
*
|
2005-08-08 |
2009-09-17 |
Shilin Chen |
Methods and systems for designing and/or selecting drilling equipment using predictions of rotary drill bit walk
|
GB2482851B
(en)
|
2005-08-08 |
2012-04-04 |
Haliburton Energy Services Inc |
Computer-implemented method for designing a rotary drill bit with a desired bit walk rate
|
US7860693B2
(en)
|
2005-08-08 |
2010-12-28 |
Halliburton Energy Services, Inc. |
Methods and systems for designing and/or selecting drilling equipment using predictions of rotary drill bit walk
|
WO2008150765A1
(en)
|
2007-05-30 |
2008-12-11 |
Halliburton Energy Services, Inc. |
Rotary drill bit with gage pads having improved steerability and reduced wear
|
BRPI0821259A2
(pt)
*
|
2007-12-14 |
2015-06-16 |
Halliburton Energy Serv Inc |
Métodos e sistemas para prever avanço da broca de perfuração rotativa e para desenhar brocas de pefuração rotativas e outras ferramentas de fundo do poço.
|
US20110168452A1
(en)
*
|
2008-08-14 |
2011-07-14 |
Baker Hughes Incorporated |
Tungsten Carbide Bit with Hardfaced Nose Area
|
EP2318638A2
(de)
*
|
2008-08-14 |
2011-05-11 |
Baker Hughes Incorporated |
Bohrkegel mit oberflächengehärteter nase
|
US8307920B2
(en)
*
|
2009-08-13 |
2012-11-13 |
Baker Hughes Incorporated |
Roller cone disk with shaped compacts
|
US9249628B2
(en)
*
|
2012-11-16 |
2016-02-02 |
National Oilwell DHT, L.P. |
Hybrid rolling cone drill bits and methods for manufacturing same
|
US9376866B2
(en)
*
|
2013-08-23 |
2016-06-28 |
Varel International Ind., L.P. |
Hybrid rotary cone drill bit
|
US10113365B2
(en)
*
|
2016-02-12 |
2018-10-30 |
Hijet Bit LLC |
Drill bit for milling composite plugs
|