Issued Patents All Time
Showing 51–58 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6494272 | Drilling system utilizing eccentric adjustable diameter blade stabilizer and winged reamer | Jay M. Eppink, David E. Rios-Aleman | 2002-12-17 |
| 6488104 | Directional drilling assembly and method | Jay M. Eppink, David E. Rios-Aleman | 2002-12-03 |
| 6349763 | Electrical surface activated downhole circulating sub | James W. Estep, Harold D. Johnson | 2002-02-26 |
| 6325162 | Bit connector | Jay M. Eppink, David E. Rios-Aleman | 2001-12-04 |
| 6318470 | Recirculatable ball-drop release device for lateral oilwell drilling applications | Chi Chang, James W. Estep | 2001-11-20 |
| 6227312 | Drilling system and method | Jay M. Eppink, David E. Rios-Aleman | 2001-05-08 |
| 6213226 | Directional drilling assembly and method | Jay M. Eppink, David E. Rios-Aleman | 2001-04-10 |
| 5857531 | Bottom hole assembly for directional drilling | James W. Estep, Lance D. Underwood | 1999-01-12 |