Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6460619 | Method and apparatus for creation and isolation of multiple fracture zones in an earth formation | Stephen Richard Braithwaite | 2002-10-08 |
| 6460618 | Method and apparatus for improving the permeability in an earth formation utilizing shock waves | Stephen Richard Braithwaite | 2002-10-08 |
| 6460615 | Pipe expansion device | — | 2002-10-08 |
| 6457749 | Lock assembly | — | 2002-10-01 |
| 6390202 | Setting an annular seal | — | 2002-05-21 |
| 6390199 | Downhole safety valve | — | 2002-05-21 |
| 6386285 | Flow identification system | Jan Fokke Holtrop | 2002-05-14 |
| 6380476 | Generating electric power in a wellbore | John Foreman Stewart, Robert Nicholas Worrall | 2002-04-30 |
| 6371211 | Method of creating a weld in a wellbore | Djurre Hans Zijsling | 2002-04-16 |
| 5295810 | Apparatus for compressing a fluid | — | 1994-03-22 |
| 5103911 | Method and apparatus for perforating a well liner and for fracturing a surrounding formation | — | 1992-04-14 |
| 5071053 | Method and device for joining well tubulars | — | 1991-12-10 |
| 4958856 | Pressure energized sealing joint | — | 1990-09-25 |