Inventor · disambiguated record
Gary R. Portwood
Also filed as: PORTWOOD GARY · PORTWOOD GARY R · PORTWOOD GARY RAY · SIRACKI MICHAEL A
54 granted patents·3 pending applications·2,698 citations·filing 1991–2024
99Inventor score
Files withSMITH INTERNATIONAL49SCHLUMBERGER TECHNOLOGY CORP3FERRARI GIAMPAOLO1PORTWOOD GARY1SMITH INTERNAT1
Top patents by PatentIndex Score
57 records- 0198US6241035B1Superhard material enhanced inserts for earth-boring bitsSMITH INTERNATIONAL·Filed 1998·Granted Jun 5, 2001·110 cites·66 claims
- 0296US6988569B2Cutting element orientation or geometry for improved drill bitsSMITH INTERNAT·Filed 2005·Granted Jan 24, 2006·54 cites·7 claims
- 0395US5351770AUltra hard insert cutters for heel row rotary cone rock bit applicationsSMITH INTERNATIONAL·Filed 1993·Granted Oct 4, 1994·183 cites·24 claims
- 0494US6367568B2Steel tooth cutter element with expanded crestSMITH INTERNATIONAL·Filed 2001·Granted Apr 9, 2002·118 cites·8 claims
- 0594US6290008B1Inserts for earth-boring bitsSMITH INTERNATIONAL·Filed 1998·Granted Sep 18, 2001·180 cites·68 claims
- 0693US6241034B1Cutter element with expanded crest geometrySMITH INTERNATIONAL·Filed 1998·Granted Jun 5, 2001·169 cites·36 claims
- 0792US6199645B1Engineered enhanced inserts for rock drilling bitsSMITH INTERNATIONAL·Filed 1998·Granted Mar 13, 2001·125 cites·13 claims
- 0891US7832506B2Cutting elements with increased toughness and thermal fatigue resistance for drilling applicationsSMITH INTERNATIONAL·Filed 2008·Granted Nov 16, 2010·10 cites·37 claims
- 0991US5341890AUltra hard insert cutters for heel row rotary cone rock bit applicationsSMITH INTERNATIONAL·Filed 1993·Granted Aug 30, 1994·138 cites·21 claims
- 1089US6848521B2Cutting elements of gage row and first inner row of a drill bitSMITH INTERNATIONAL·Filed 2003·Granted Feb 1, 2005·49 cites·22 claims
- 1189US5813485ACutter element adapted to withstand tensile stressSMITH INTERNATIONAL·Filed 1996·Granted Sep 29, 1998·110 cites·69 claims
- 1287US6510909B2Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting dutySMITH INTERNATIONAL·Filed 2002·Granted Jan 28, 2003·49 cites·51 claims
- 1387US6059054ANon-symmetrical stress-resistant rotary drill bit cutter elementSMITH INTERNATIONAL·Filed 1997·Granted May 9, 2000·120 cites·57 claims
- 1487US5362073AComposite seal for rotary cone rock bitsSMITH INTERNATIONAL·Filed 1992·Granted Nov 8, 1994·59 cites·12 claims
- 1586US6196339B1Dual-seal drill bit pressure communication systemSMITH INTERNATIONAL·Filed 1998·Granted Mar 6, 2001·67 cites·42 claims
- 1684US6695079B2Dual-seal drill bit pressure communication systemSMITH INTERNATIONAL·Filed 2002·Granted Feb 24, 2004·15 cites·15 claims
- 1783US6561293B2Cutter element with non-linear, expanded crestSMITH INTERNATIONAL·Filed 2001·Granted May 13, 2003·51 cites·20 claims
- 1883US5833020ARolling cone bit with enhancements in cutter element placement and materials to optimize borehole corner cutting dutySMITH INTERNATIONAL·Filed 1996·Granted Nov 10, 1998·61 cites·71 claims
- 1982US5967245ARolling cone bit having gage and nestled gage cutter elements having enhancements in materials and geometry to optimize borehole corner cutting dutySMITH INTERNATIONAL·Filed 1997·Granted Oct 19, 1999·100 cites·63 claims
- 2081US6305483B1Multi-piece rotary cone drill bit sealSMITH INTERNATIONAL·Filed 1999·Granted Oct 23, 2001·86 cites·49 claims
- 2181US5415244AConical inserts for rolling cone rock bitsSMITH INTERNATIONAL·Filed 1994·Granted May 16, 1995·69 cites·19 claims
- 2280US7690442B2Drill bit and cutting inserts for hard/abrasive formationsSMITH INTERNATIONAL·Filed 2006·Granted Apr 6, 2010·22 cites·53 claims
- 2380US7367413B2Cutting elements of gage row and first inner row of a drill bitSMITH INTERNATIONAL·Filed 2006·Granted May 6, 2008·10 cites·27 claims
- 2480US5172779ARadial crest insertSMITH INTERNATIONAL·Filed 1991·Granted Dec 22, 1992·73 cites·9 claims
- 2576US12421801B2Drill bit for use with intensified fluid pressuresSCHLUMBERGER TECHNOLOGY CORP·Filed 2024·Granted Sep 23, 2025·0 cites·9 claims
- 2676US6698536B2Roller cone drill bit having lubrication contamination detector and lubrication positive pressure maintenance systemSMITH INTERNATIONAL·Filed 2002·Granted Mar 2, 2004·45 cites·20 claims
- 2776US6640913B2Drill bit with canted gage insertSMITH INTERNATIONAL·Filed 1998·Granted Nov 4, 2003·42 cites·55 claims
- 2876US5421424ABowed out chisel insert for rock bitsSMITH INTERNATIONAL·Filed 1994·Granted Jun 6, 1995·56 cites·7 claims
- 2975US6033117ASealed bearing drill bit with dual-seal configurationSMITH INTERNATIONAL·Filed 1997·Granted Mar 7, 2000·66 cites·130 claims
- 3074US8316968B2Rolling cone drill bit having sharp cutting elements in a zone of interestFERRARI GIAMPAOLO·Filed 2010·Granted Nov 27, 2012·8 cites·38 claims
- 3173US6679342B2Dual-seal drill bit pressure communication systemSMITH INTERNATIONAL·Filed 2002·Granted Jan 20, 2004·21 cites·13 claims
- 3273US6161634ACutter element with non-rectilinear crestFiled 1998·Granted Dec 19, 2000·63 cites·26 claims
- 3372US6176329B1Drill bit with ridge-cutting cutter elementsSMITH INTERNATIONAL·Filed 1998·Granted Jan 23, 2001·52 cites·59 claims
- 3471US5915486ACutter element adapted to withstand tensile stressSMITH INTERNATIONAL·Filed 1997·Granted Jun 29, 1999·49 cites·37 claims
- 3569US12037850B2Drill bit for use with intensified fluid pressuresSCHLUMBERGER TECHNOLOGY CORP·Filed 2022·Granted Jul 16, 2024·0 cites·19 claims
- 3669US6782959B2Cutter element with non-linear, expanded crestSMITH INTERNATIONAL·Filed 2003·Granted Aug 31, 2004·26 cites·15 claims
- 3768US7124842B2Cutting elements of gage row and first inner row of a drill bitSMITH INTERNATIONAL·Filed 2005·Granted Oct 24, 2006·5 cites·8 claims
- 3867US11566475B2Fixed cutter drill bit with high fluid pressuresSMITH INTERNATIONAL·Filed 2019·Granted Jan 31, 2023·1 cites·20 claims
- 3965US5394952ACore cutting rock bitSMITH INTERNATIONAL·Filed 1993·Granted Mar 7, 1995·49 cites·22 claims
- 4064US6431293B1Dual-seal drill bit pressure communication systemSMITH INTERNATIONAL·Filed 2000·Granted Aug 13, 2002·20 cites·26 claims
- 4161US2023167689A1Fixed cutter drill bit with high fluid pressuresSCHLUMBERGER TECHNOLOGY CORP·Filed 2023·Application pending·0 cites
- 4260US9856701B2Rolling cone drill bit having high density cutting elementsSMITH INTERNATIONAL·Filed 2015·Granted Jan 2, 2018·1 cites·20 claims
- 4359US6655478B2Fracture and wear resistant rock bitsSMITH INTERNATIONAL·Filed 2001·Granted Dec 2, 2003·21 cites·17 claims
- 4458US6561292B1Rock bit with load stabilizing cutting structureSMITH INTERNATIONAL·Filed 2000·Granted May 13, 2003·19 cites·39 claims
- 4557US11512536B2Drill bit for use with intensified fluid pressuresSMITH INTERNATIONAL·Filed 2019·Granted Nov 29, 2022·0 cites·13 claims
- 4657US7743857B2Cutting elements of gage row and first inner row of a drill bitSMITH INTERNATIONAL·Filed 2008·Granted Jun 29, 2010·2 cites·20 claims
- 4755USRE36452EComposite seal for rotary cone rock bitsSMITH INTERNATIONAL·Filed 1996·Granted Dec 21, 1999·37 cites·12 claims
- 4852US7913778B2Rock bit with hydraulic configurationSMITH INTERNATIONAL·Filed 2008·Granted Mar 29, 2011·4 cites·36 claims
- 4950US6460636B1Drill bit inserts with variations in thickness of diamond coatingSMITH INTERNATIONAL·Filed 1999·Granted Oct 8, 2002·27 cites·24 claims
- 5047US5853055ARock bit with an extended center jetSMITH INTERNATIONAL·Filed 1996·Granted Dec 29, 1998·24 cites·62 claims
Showing the top 50 of 57 patent records by PatentIndex Score.
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