| 6695079 |
Dual-seal drill bit pressure communication system |
Gary R. Portwood, Chris E. Cawthorne, Robert H. Slaughter, Jr., Peter Thomas Cariveau, Robert Denton |
2004-02-24 |
| 6679342 |
Dual-seal drill bit pressure communication system |
Gary R. Portwood, Chris E. Cawthorne, Robert Denton, Robert H. Slaughter, Jr., Peter Thomas Cariveau |
2004-01-20 |
| 6619412 |
Protected lubricant reservoir for sealed earth boring drill bit |
Robert H. Slaughter, Jr., Peter Thomas Cariveau, Kirk A. Norris, William M. Conn |
2003-09-16 |
| 6431293 |
Dual-seal drill bit pressure communication system |
Gary R. Portwood, Chris E. Cawthorne, Robert H. Slaughter, Jr., Peter Thomas Cariveau, Robert Denton |
2002-08-13 |
| 6408957 |
Sealed bearing roller cone bit having anti-plugging device |
Robert H. Slaughter, Jr., Fakhroldin Mohammad Jadbabaei, Peter Thomas Cariveau, Vincent Shotton |
2002-06-25 |
| 6296067 |
Protected lubricant reservoir for sealed bearing earth boring drill bit |
Robert H. Slaughter, Jr., Peter Thomas Cariveau, Kirk A. Norris, William M. Conn |
2001-10-02 |
| 6264367 |
Dual-seal drill bit with fluid cleaning capability |
Robert H. Slaughter, Jr. |
2001-07-24 |
| 6254275 |
Sealed bearing drill bit with dual-seal configuration and fluid-cleaning capability |
Robert H. Slaughter, Jr., Peter Thomas Cariveau |
2001-07-03 |
| 6206110 |
Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit |
Robert H. Slaughter, Jr., Peter Thomas Cariveau, Kirk A. Norris, William M. Conn |
2001-03-27 |
| 6196338 |
Hardfacing rock bit cones for erosion protection |
Robert H. Slaughter, Jr. |
2001-03-06 |
| 6196339 |
Dual-seal drill bit pressure communication system |
Gary R. Portwood, Chris E. Cawthorne, Robert H. Slaughter, Jr., Peter Thomas Cariveau, Robert Denton |
2001-03-06 |
| 6123337 |
Composite earth boring bit seal |
Zhigang Fang, Sujian Huang, Chris E. Cawthorne, Brian A. James, G. Steve Kyker +1 more |
2000-09-26 |
| 6116357 |
Rock drill bit with back-reaming protection |
Robert B. Wagoner, William M. Conn, Peter Thomas Cariveau |
2000-09-12 |
| 6033117 |
Sealed bearing drill bit with dual-seal configuration |
Peter Thomas Cariveau, Robert H. Slaughter, Jr., Chris E. Cawthorne, Gary R. Portwood |
2000-03-07 |