申请人 |
SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER CANADA LIMITED;PRAD RESEARCH AND DEVELOPMENT N.V.;SCHLUMBERGER TECHNOLOGY B.V.;SCHUMBERGER OVERSEAS S.A.;SCHLUMBERGER SURENCO S.A.;SCHLUMBERGER HOLDINGS LIMITED |
发明人 |
VENKATARAMANAN, LALITHA;SONG, YI-QIAO;HURLIMANN, MARTIN, D. |