Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6973980 | Petroleum drilling method and apparatus to cool and clean drill bit with recirculating fluid composition while reclaiming most water utilized and greatly reducing the normal consumption of water during drilling | Gary F. Stepenoff | 2005-12-13 |