Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8997851 | Grinding arrangement for tool joints on a drill string | Per Espen Edvardsen | 2015-04-07 |
| 8985229 | Sealing arrangement, and corresponding method | Per Espen Edvardsen | 2015-03-24 |
| 8403034 | Device and method for maintaining constant pressure on, and flow drill fluid, in a drill string | Per Espen Edvardsen | 2013-03-26 |
| 8100189 | System and method for dynamic sealing of a drill string | Per Espen Edvardson | 2012-01-24 |
| 8066062 | Seal for a drill string | Per Espen Edvardsen | 2011-11-29 |
| 7984765 | System and method for well intervention | — | 2011-07-26 |