Issued Patents 2002
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6458471 | Reinforced abrasive-impregnated cutting elements, drill bits including same and methods | Lorenzo G. Lovato | 2002-10-01 |
| 6450271 | Surface modifications for rotary drill bits | Danny E. Scott, James L. Overstreet, Terry J. Kolterman, Chih Lin, James Andy Oxford +1 more | 2002-09-17 |
| 6390211 | Variable orientation nozzles for earth boring drill bits, drill bits so equipped, and methods of orienting | — | 2002-05-21 |
| 6357538 | Bit torque limiting device | — | 2002-03-19 |
| 6338390 | Method and apparatus for drilling a subterranean formation employing drill bit oscillation | — | 2002-01-15 |