Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6607044 | Three dimensional steerable system and method for steering bit to drill borehole | Jay M. Eppink, James W. Estep, James B. Terry, Thomas Wilson, William Trainor | 2003-08-19 |
| 6598687 | Three dimensional steerable system | Jay M. Eppink, James W. Estep, James B. Terry, Thomas Wilson, William Trainor | 2003-07-29 |
| 6543532 | Electrical surface activated downhole circulating sub | James W. Estep, Harold D. Johnson | 2003-04-08 |