申请人 |
SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LTD;HARRISON, CHRISTOPHER;O'KEEFE, MICHAEL;VAN HAL, RONALD;LAWRENCE, JIMMY;MULLINS, OLIVER C. |
发明人 |
HARRISON, CHRISTOPHER;O'KEEFE, MICHAEL;VAN HAL, RONALD;LAWRENCE, JIMMY;MULLINS, OLIVER C. |