Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6443249 | Rotary drill bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics | Christopher C. Beuershausen, Mark W. Dykstra, Roland Illerhaus, Steve R. Matson, James A. Norris +2 more | 2002-09-03 |
| 6415877 | Subsea wellbore drilling system for reducing bottom hole pressure | Roland May, Peter Fontana, Larry Watkins, James W. Macfarlane | 2002-07-09 |
| 6408948 | Tubing handling for subsea oilfield tubing operations | Peter Fontana, James W. Macfarlane | 2002-06-25 |