Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8978790 | Retention of cutters in bore hole tools | — | 2015-03-17 |
| 8272458 | Drill bit with replaceable blade members | — | 2012-09-25 |
| 8225884 | Rotor underreamer, section mill, casing cutter, casing scraper and drill string centralizer | — | 2012-07-24 |
| 6978848 | Method and apparatus for penetrating subsurface formations | — | 2005-12-27 |
| 6959774 | Drilling apparatus | — | 2005-11-01 |
| 6695074 | Method and apparatus for enlarging well bores | — | 2004-02-24 |
| 6691803 | Drill bit assembly having pivotal cutter blades | — | 2004-02-17 |
| 6454024 | Replaceable drill bit assembly | — | 2002-09-24 |
| 5494121 | Cavern well completion method and apparatus | — | 1996-02-27 |