Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12084943 | Valve device and method | — | 2024-09-10 |
| 12000248 | Gas lift valve | — | 2024-06-04 |
| 11454086 | Valve device and method | — | 2022-09-27 |
| 11230893 | Method of manufacturing a side pocket mandrel body | Ståle Pettersen | 2022-01-25 |
| 10662723 | Method of manufacturing a side pocket mandrel body | Ståle Pettersen | 2020-05-26 |
| 10450821 | Wellhead port plug assembly | Lino Guedes, Andre Bolager, Erling Kleppa, Trond Kvasnes | 2019-10-22 |
| 10167699 | Expandable device for forming a cement plug | — | 2019-01-01 |
| 9611720 | Valve arrangement and method of operating the same | Ole Sevheim, Erling Kleppa | 2017-04-04 |
| 9580991 | Shear valve | Helge Skorve, Magnar Tveiten | 2017-02-28 |
| 9157294 | Wave-inducing device, casing system and method for cementing a casing in a borehole | Erling Kleppa | 2015-10-13 |
| 8136601 | Power lift generator | Magnar Tveiten, David Hutchinson, Egil Josefsen | 2012-03-20 |
| 5667015 | Well barrier | Thor-Peter Herigstad | 1997-09-16 |