Inventor
PORTWOOD GARY
US13 patents
⚠️ This page may combine multiple inventors who share the name “PORTWOOD GARY”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SMITH INTERNATIONAL
10 patentsUS5351770AOct 4, 1994
Ultra hard insert cutters for heel row rotary cone rock bit applications
SMITH INTERNATIONAL183 citations99
US5341890AAug 30, 1994
Ultra hard insert cutters for heel row rotary cone rock bit applications
SMITH INTERNATIONAL138 citations98
US5421424AJun 6, 1995
Bowed out chisel insert for rock bits
SMITH INTERNATIONAL56 citations96
US5415244AMay 16, 1995
Conical inserts for rolling cone rock bits
SMITH INTERNATIONAL69 citations95
US6655478B2Dec 2, 2003
Fracture and wear resistant rock bits
SMITH INTERNATIONAL21 citations92
US5362073ANov 8, 1994
Composite seal for rotary cone rock bits
SMITH INTERNATIONAL59 citations91
USRE36452EDec 21, 1999
Composite seal for rotary cone rock bits
SMITH INTERNATIONAL37 citations90
US7690442B2Apr 6, 2010
Drill bit and cutting inserts for hard/abrasive formations
SMITH INTERNATIONAL22 citations89
US5394952AMar 7, 1995
Core cutting rock bit
SMITH INTERNATIONAL49 citations86
US7913778B2Mar 29, 2011
Rock bit with hydraulic configuration
SMITH INTERNATIONAL4 citations59