Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7448454 | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling | Don M. Hannegan | 2008-11-11 |
| 7258171 | Internal riser rotating control head | Don M. Hannegan, Thomas F. Bailey, James W. Chambers, Timothy L. Wilson | 2007-08-21 |
| 7159669 | Internal riser rotating control head | Don M. Hannegan, Thomas F. Bailey, James W. Chambers, Timothy L. Wilson | 2007-01-09 |
| 6913092 | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling | Don M. Hannegan | 2005-07-05 |
| 6470975 | Internal riser rotating control head | Don M. Hannegan | 2002-10-29 |
| 6263982 | Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling | Don M. Hannegan | 2001-07-24 |
| 6138774 | Method and apparatus for drilling a borehole into a subsea abnormal pore pressure environment | Adam T. Bourgoyne, Jr., Tammy T. Bourgoyne | 2000-10-31 |