Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6834726 | Method and apparatus to reduce downhole surge pressure using hydrostatic valve | Richard L. Giroux, David M. Haugen | 2004-12-28 |
| 6736210 | Apparatus and methods for placing downhole tools in a wellbore | Thomas Roesnor | 2004-05-18 |
| 6732804 | Dynamic mudcap drilling and well control system | Ramkumar K. Bansal, Robert L. Cuthbertson | 2004-05-11 |