Bernard Doremus

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Fontainebleau, FR

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Patents Grantslast 30 patents

Information Patent Grant
Subsea master valve for use in well testing
- Patent number 4,658,904
- Issue date Apr 21, 1987
- Schlumberger Technology Corporation
- Bernard Doremus
- E21 - EARTH DRILLING MINING
Information Patent Grant
Safety valve in particular for closing an oil well
- Patent number 4,651,828
- Issue date Mar 24, 1987
- Schlumberger Technology Corporation
- Bernard Doremus
- E21 - EARTH DRILLING MINING
Information Patent Grant
Plug valve equipped with pressure equalization means
- Patent number 4,577,662
- Issue date Mar 25, 1986
- Schlumberger Technology Corporation
- Bernard Doremus
- E21 - EARTH DRILLING MINING
Information Patent Grant
Remote hydraulic control method and apparatus, notably for underwat...
- Patent number 4,442,902
- Issue date Apr 17, 1984
- Schlumberger Technology Corporation
- Bernard Doremus
- E21 - EARTH DRILLING MINING
Information Patent Grant
Pulling and running tool
- Patent number 3,950,021
- Issue date Apr 13, 1976
- Schlumberger Technology Corporation
- Pierre Goldschild
- E21 - EARTH DRILLING MINING