Inventor
DIDERICKSEN ROGER
US14 patents
Patents
14 patentsUS6116357ASep 12, 2000
Rock drill bit with back-reaming protection
SMITH INTERNATIONAL101 citations96
US6196339B1Mar 6, 2001
Dual-seal drill bit pressure communication system
SMITH INTERNATIONAL67 citations95
US6033117AMar 7, 2000
Sealed bearing drill bit with dual-seal configuration
SMITH INTERNATIONAL66 citations95
US6206110B1Mar 27, 2001
Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit
SMITH INTERNATIONAL65 citations94
US6123337ASep 26, 2000
Composite earth boring bit seal
SMITH INTERNATIONAL69 citations94
US6695079B2Feb 24, 2004
Dual-seal drill bit pressure communication system
SMITH INTERNATIONAL15 citations92
US6679342B2Jan 20, 2004
Dual-seal drill bit pressure communication system
SMITH INTERNATIONAL21 citations92
US6431293B1Aug 13, 2002
Dual-seal drill bit pressure communication system
SMITH INTERNATIONAL20 citations92
US6264367B1Jul 24, 2001
Dual-seal drill bit with fluid cleaning capability
SMITH INTERNATIONAL33 citations92
US6254275B1Jul 3, 2001
Sealed bearing drill bit with dual-seal configuration and fluid-cleaning capability
SMITH INTERNATIONAL49 citations92
US6296067B1Oct 2, 2001
Protected lubricant reservoir for sealed bearing earth boring drill bit
SMITH INTERNATIONAL26 citations91
US6408957B1Jun 25, 2002
Sealed bearing roller cone bit having anti-plugging device
SMITH INTERNATIONAL33 citations90
US6196338B1Mar 6, 2001
Hardfacing rock bit cones for erosion protection
SMITH INTERNATIONAL43 citations90
US6619412B2Sep 16, 2003
Protected lubricant reservoir for sealed earth boring drill bit
SMITH INTERNATIONAL18 citations82