Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9593536 | Casing drilling system and method | Ola M. Vestavik, Morten Olav Meling | 2017-03-14 |
| 9267344 | Actuator for dual drill string valve and drill string valve configurations therefore | Espen Alhaug | 2016-02-23 |
| 8997871 | Actuator for dual drill string valve and rotary drill string valve configuration therefor | Espen Alhaug | 2015-04-07 |
| 8955847 | Sealing arrangement for a down hole valve | Harald Syse | 2015-02-17 |