Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10480256 | Riser system for coupling selectable modules to the riser | John H. Cohen | 2019-11-19 |
| 9670744 | Drilling fluid circulation system | — | 2017-06-06 |
| 9664006 | Riser isolation device having automatically operated annular seal | — | 2017-05-30 |
| 9428975 | Drilling fluid pump module coupled to specially configured riser segment and method for coupling the pump module to the riser | Kjell Rune Toftevåg, Inge Fadnes, Arvid Iversen | 2016-08-30 |
| 9322232 | System and method for inhibiting an explosive atmosphere in open riser subsea mud return drilling systems | Mehdi Rajabi, Bjorn Rohde | 2016-04-26 |
| 9068420 | Device and method for controlling return flow from a bore hole | Mehdi Rajabi | 2015-06-30 |
| 9057233 | Boost system and method for dual gradient drilling | Sigurd Ree | 2015-06-16 |
| 8783379 | Fluid transfer device usable in managed pressure and dual-gradient drilling | — | 2014-07-22 |
| 7958948 | Method and system for return of drilling fluid | — | 2011-06-14 |
| 7913764 | Return line mounted pump for riserless mud return system | David E. Smith, Nils Lennart Rolland, Harald Hufthammer | 2011-03-29 |
| 7677329 | Method and device for controlling drilling fluid pressure | — | 2010-03-16 |
| 7431081 | Device for removal and filtration of drilling fluid | — | 2008-10-07 |
| 7044226 | Method and a device for removing a hydrate plug | — | 2006-05-16 |
| 6857472 | Well pump device | — | 2005-02-22 |