Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6119781 | Method of operating an oil and gas production well activated by a pumping system | Pierre Lemetayer, Michel Casagrande | 2000-09-19 |
| 4805697 | Method of pumping hydrocarbons from a mixture of said hydrocarbons with an aqueous phase and installation for the carrying out of the method | Daniel Sango | 1989-02-21 |
| 4770243 | Device for regulating the rate of flow of water which is separated from its mixture with hydrocarbons and reinjected into the bottom of the well | Daniel Sango | 1988-09-13 |