Roger Francois Rouviere

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13770 Venelles, FR

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Patents Grantslast 30 patents

Information Patent Grant
Valve apparatus for deep drilling
- Patent number 4,072,166
- Issue date Feb 7, 1978
- Wladimir Tiraspolsky
- E21 - EARTH DRILLING MINING
Information Patent Grant
Process and universal downhole motor for driving a tool
- Patent number 4,011,917
- Issue date Mar 15, 1977
- Wladimir Tiraspolsky
- E21 - EARTH DRILLING MINING