Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6439313 | Downhole machining of well completion equipment | Hubertus V. Thomeer, James M. Costley, Randolph J. Sheffield, Marc Allcorn, Mark Callister Oettli | 2002-08-27 |
| 6425443 | Pressure compensated disconnect system and method | Stephen D. Hill, James M. Costley, Mark Callister Oettli, Randolph J. Sheffield | 2002-07-30 |