Issued Patents All Time
Showing 26–50 of 57 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5305830 | Method and device for carrying out measurings and/or servicings in a wellbore or a well in the process of being drilled | — | 1994-04-26 |
| 5259452 | System for sensing acoustic waves in wells, allowing the mechanical uncoupling of the sensors | — | 1993-11-09 |
| 5217075 | Method and device for carrying out interventions in wells where high temperatures prevail | — | 1993-06-08 |
| 5217072 | Device for carrying out interventions in nonflowing deflected producing wells | — | 1993-06-08 |
| 5180011 | Method and device for carrying out measuring operations of interventions in a well | — | 1993-01-19 |
| 5150750 | Device for activating and measuring nonflowing producing wells | Jacques Lessi | 1992-09-29 |
| 5111880 | System for driving a non rigid exploration device into a well where its progression by gravity is difficult | Jean-Claude Dubois | 1992-05-12 |
| 5080168 | Device for locking a cable passing across the wall of a tube such as a side-entry sub | — | 1992-01-14 |
| 5054557 | Device for extracting a liquid out of a tube of great length | — | 1991-10-08 |
| 5044437 | Method and device for performing perforating operations in a well | — | 1991-09-03 |
| 5038108 | Determing parameters of a geological environment | Jacques Lessi | 1991-08-06 |
| 5016727 | Method and device of seismic prospection in wells and particularly deviated wells | — | 1991-05-21 |
| 4990853 | Protective device permitting more specially the use of probe in large diameter wells | — | 1991-02-05 |
| 4945987 | Method and device for taking measurements and/or carrying out interventions in a sharply inclined well section and its application to production of seismic profiles | — | 1990-08-07 |
| 4929915 | Protective device for enlarging the effective diameter of a probe in large diameter wells | — | 1990-05-29 |
| 4913227 | Equipment for a drill pipe string including a side entry sub, a safety member for anchoring a cable on a support, and a method of using the equipment | — | 1990-04-03 |
| 4905774 | Process and device for guiding a drilling tool through geological formations | — | 1990-03-06 |
| 4898237 | Probe and its multidirectional anchoring device in a well | — | 1990-02-06 |
| 4898241 | Method and device for taking measurements and/or carrying out interventions in a well subjected to hydraulic compression | — | 1990-02-06 |
| 4898240 | System for moving a set of instruments and a method for measurement and/or intervention in a well | — | 1990-02-06 |
| 4877095 | Stopper for cable passages or conduits | — | 1989-10-31 |
| 4803874 | Device and method for determining the orientation of fractures in a geological formation | Jacques Marrast, Andre Pauc | 1989-02-14 |
| 4794791 | Method and device for making measurements characterizing geological formations, in a horizontal borehole formed from an underground way | — | 1989-01-03 |
| 4775009 | Process and device for installing seismic sensors inside a petroleum production well | Jean Laurent, Charles Naville | 1988-10-04 |
| 4738312 | Cable cutting coupling for drilling, production, well logging or other operations in wells | — | 1988-04-19 |