Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6224112 | Casing slip joint | David M. Haugen, Salah Mahmoud | 2001-05-01 |
| 6082451 | Wellbore shoe joints and cementing systems | Richard L. Giroux, Peter Budde, Frederick T. Tilton | 2000-07-04 |
| 5839866 | Mechanical overload protection device | Terje Moen, Tarald Gudmestad | 1998-11-24 |
| 4981177 | Method and apparatus for establishing communication with a downhole portion of a control fluid pipe | Michael A. Carmody, Lars Vinje | 1991-01-01 |
| 4951753 | Subsurface well safety valve | — | 1990-08-28 |
| 4944351 | Downhole safety valve for subterranean well and method | Brian Keith Drakeley, Michael A. Carmody | 1990-07-31 |