申请人 |
SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER TECHNOLOGY B.V.;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER CANADA LIMITED;PETROLEUM RESEARCH AND DEVELOPMENT N.V.;SCHLUMBERGER OVERSEAS S.A.;SCHLUMBERGER OILFIELD ASSISTANCE LIMITED;SCHLUMBERGER SURENCO S.A.;SCHLUMBERGER SERVICES LIMITED;SCHLUMBERGER SEACO INC.;WRAIGHT, PETER;GRIFFITHS, ROGER;STEPHENSON, KENNETH |
发明人 |
WRAIGHT, PETER;GRIFFITHS, ROGER;STEPHENSON, KENNETH |