申请人 |
SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED |
发明人 |
COATES, RICHARD T.;MILLER, DOUGLAS E.;HARTOG, ARTHUR H.;WILSON, COLIN A.;BRADY, DOMINIC;MENKITI, HENRY;AUZERAIS, FRANCOIS M.;BRADFORD, IAN |