Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8418772 | Mandrel to be inserted into a liquid circulation pipe and associated positioning method | Francois Millet, Pierre-Arnaud Foucher | 2013-04-16 |
| 6378611 | Procedure and device for treating well perforations | — | 2002-04-30 |
| 4726422 | Annular safety assembly for an oil well, especially a double production zone well | Jean A. Lescoeur | 1988-02-23 |
| 4651827 | Hydraulically controlled safety valves for incorporation in production tubes of hydrocarbon production wells | Michel Raimond | 1987-03-24 |
| 4597446 | Safety valves for wells | — | 1986-07-01 |
| 4560005 | Sliding-sleeve valve for an oil well | Fabrice R. Arnaud, Yannick Le Nours | 1985-12-24 |
| 4518036 | Device for controlling a safety valve disposed below an activation pump in a hydrocarbon production well | Herve M. Lefebvre | 1985-05-21 |