Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10428586 | Reamer assembly | David B. Wagner, Brent Lane | 2019-10-01 |
| 10364605 | Rotary percussive device | — | 2019-07-30 |
| 9416593 | Piston strike face and bit interface for percussion hammer drill | Xiaoge Gan, Lokesh Bhatia, Kevin Edgar Harrington | 2016-08-16 |
| 8302709 | Downhole tool leg retention methods and apparatus | Amol Bhome | 2012-11-06 |
| 8177000 | Modular system for a back reamer and method | Amol Bhome, Parag Konde, Sukhveer Singh Kalsi | 2012-05-15 |
| 7237627 | Bearing and lubrication system for earth boring bit | Lance Richman, Chris E. Cawthorne, Kirk A. Norris | 2007-07-03 |
| 7210377 | Cone erosion protection for roller cone drill bits | Anthony Griffo, Zhigang Fang | 2007-05-01 |
| 7152702 | Modular system for a back reamer and method | Amol Bhome | 2006-12-26 |
| 7137460 | Back reaming tool | Peter Thomas Cariveau, Vincent Shotton | 2006-11-21 |
| 6729418 | Back reaming tool | Peter Thomas Cariveau, Vincent Shotton | 2004-05-04 |
| 6698098 | Cone erosion protection for roller cone drill bits | Anthony Griffo, Zhigang Fang | 2004-03-02 |
| 6695079 | Dual-seal drill bit pressure communication system | Gary R. Portwood, Chris E. Cawthorne, Roger Didericksen, Peter Thomas Cariveau, Robert Denton | 2004-02-24 |
| 6679342 | Dual-seal drill bit pressure communication system | Gary R. Portwood, Chris E. Cawthorne, Robert Denton, Roger Didericksen, Peter Thomas Cariveau | 2004-01-20 |
| 6619412 | Protected lubricant reservoir for sealed earth boring drill bit | Peter Thomas Cariveau, Kirk A. Norris, Roger Didericksen, William M. Conn | 2003-09-16 |
| 6598689 | Roller cone for drill bit having improved resistance to fatigue cracking | Fakhroldin Mohammad Jadbabaei | 2003-07-29 |
| 6431293 | Dual-seal drill bit pressure communication system | Gary R. Portwood, Chris E. Cawthorne, Roger Didericksen, Peter Thomas Cariveau, Robert Denton | 2002-08-13 |
| 6408957 | Sealed bearing roller cone bit having anti-plugging device | Fakhroldin Mohammad Jadbabaei, Peter Thomas Cariveau, Vincent Shotton, Roger Didericksen | 2002-06-25 |
| 6296067 | Protected lubricant reservoir for sealed bearing earth boring drill bit | Peter Thomas Cariveau, Kirk A. Norris, Roger Didericksen, William M. Conn | 2001-10-02 |
| 6264367 | Dual-seal drill bit with fluid cleaning capability | Roger Didericksen | 2001-07-24 |
| 6254275 | Sealed bearing drill bit with dual-seal configuration and fluid-cleaning capability | Peter Thomas Cariveau, Roger Didericksen | 2001-07-03 |
| 6244364 | Earth-boring bit having cobalt/tungsten carbide inserts | Peter Thomas Cariveau, Zhigang Fang | 2001-06-12 |
| 6206110 | Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit | Peter Thomas Cariveau, Kirk A. Norris, Roger Didericksen, William M. Conn | 2001-03-27 |
| 6196339 | Dual-seal drill bit pressure communication system | Gary R. Portwood, Chris E. Cawthorne, Roger Didericksen, Peter Thomas Cariveau, Robert Denton | 2001-03-06 |
| 6196338 | Hardfacing rock bit cones for erosion protection | Roger Didericksen | 2001-03-06 |
| 6033117 | Sealed bearing drill bit with dual-seal configuration | Peter Thomas Cariveau, Roger Didericksen, Chris E. Cawthorne, Gary R. Portwood | 2000-03-07 |