Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5771974 | Test tree closure device for a cased subsea oil well | Christophe Rayssiguier, Jean-Paul Ribeyre | 1998-06-30 |
| 5275241 | Circulating valve apparatus and drill stem test method allowing selective fluid communication between an above packer annulus and a rathole | Andrew W. Vigor, Dinesh R. Patel | 1994-01-04 |