申请人 |
SCHLUMBERGER LIMITED;SCHLUMBERGER CANADA LIMITED;PRAD RESEARCH AND DEVELOPMENT N.V.;SCHLUMBERGER SURENCO, S.A.;SCHLUMBERGER TECHNOLOGY B.V.;SERVICE PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER OVERSEAS S.A.;SCHLUMBERGER SERVICES LIMITED;ETH ZURICH |
发明人 |
HUBELI, ANDREAS, GIOVANNI, PIERO;GROSS, MARKUS, HANZ;HAMMERSLEY, RICHARD, PAUL |