Inventor
PORTWOOD GARY R
US28 patents
⚠️ This page may combine multiple inventors who share the name “PORTWOOD GARY R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SMITH INTERNATIONAL
24 patentsUS6290008B1Sep 18, 2001
Inserts for earth-boring bits
SMITH INTERNATIONAL180 citations99
US6367568B2Apr 9, 2002
Steel tooth cutter element with expanded crest
SMITH INTERNATIONAL118 citations98
US6305483B1Oct 23, 2001
Multi-piece rotary cone drill bit seal
SMITH INTERNATIONAL86 citations98
US6241034B1Jun 5, 2001
Cutter element with expanded crest geometry
SMITH INTERNATIONAL169 citations98
US6241035B1Jun 5, 2001
Superhard material enhanced inserts for earth-boring bits
SMITH INTERNATIONAL110 citations98
US6199645B1Mar 13, 2001
Engineered enhanced inserts for rock drilling bits
SMITH INTERNATIONAL125 citations98
US5813485ASep 29, 1998
Cutter element adapted to withstand tensile stress
SMITH INTERNATIONAL110 citations98
US6848521B2Feb 1, 2005
Cutting elements of gage row and first inner row of a drill bit
SMITH INTERNATIONAL49 citations96
US6640913B2Nov 4, 2003
Drill bit with canted gage insert
SMITH INTERNATIONAL42 citations96
US5915486AJun 29, 1999
Cutter element adapted to withstand tensile stress
SMITH INTERNATIONAL49 citations96
US5172779ADec 22, 1992
Radial crest insert
SMITH INTERNATIONAL73 citations96
US6561293B2May 13, 2003
Cutter element with non-linear, expanded crest
SMITH INTERNATIONAL51 citations95
US7367413B2May 6, 2008
Cutting elements of gage row and first inner row of a drill bit
SMITH INTERNATIONAL10 citations92
US6782959B2Aug 31, 2004
Cutter element with non-linear, expanded crest
SMITH INTERNATIONAL26 citations92
US6698536B2Mar 2, 2004
Roller cone drill bit having lubrication contamination detector and lubrication positive pressure maintenance system
SMITH INTERNATIONAL45 citations92
US6561292B1May 13, 2003
Rock bit with load stabilizing cutting structure
SMITH INTERNATIONAL19 citations92
US5853055ADec 29, 1998
Rock bit with an extended center jet
SMITH INTERNATIONAL24 citations92
US6460636B1Oct 8, 2002
Drill bit inserts with variations in thickness of diamond coating
SMITH INTERNATIONAL27 citations91
US5947216ASep 7, 1999
Cutter assembly for rock bits with back support groove
SMITH INTERNATIONAL18 citations84
US7832506B2Nov 16, 2010
Cutting elements with increased toughness and thermal fatigue resistance for drilling applications
SMITH INTERNATIONAL10 citations82
US7124842B2Oct 24, 2006
Cutting elements of gage row and first inner row of a drill bit
SMITH INTERNATIONAL5 citations74
US7743857B2Jun 29, 2010
Cutting elements of gage row and first inner row of a drill bit
SMITH INTERNATIONAL2 citations63
US11566475B2Jan 31, 2023
Fixed cutter drill bit with high fluid pressures
SMITH INTERNATIONAL1 citations56
US11512536B2Nov 29, 2022
Drill bit for use with intensified fluid pressures
SMITH INTERNATIONAL0 citations56