申请人 |
SCHLUMBERGER SURENCO SA;SCHLUMBERGER OILFIELD ASSISTANCE LIMITED;SCHLUMBERGER OVERSEAS S.A.;PRAD RESEARCH AND DEVELOPMENT N.V.;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER SERVICES LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER CANADA LIMITED |
发明人 |
CUDMORE, JULIAN, R.;HASKELL, JULIAN, B.;MIRANDA, FRANCIS, X., T. |