申请人 |
SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER CANADA LIMITED;PRAD RESEARCH AND DEVELOPMENT N. V.;SCHLUMBERGER TECHNOLOGY B.V.;SCHLUMBERGER OVERSEAS S. A.;SCHLUMBERGER SURENCO S. A.;SCHLUMBERGER HOLDINGS LIMITED |
发明人 |
FELIX CHEN;GARY CORRIS;OLIVER MULLINS;XU WU;JOHN FITZGERALD;ANTHONY, R., H. GOODWIN |