申请人 |
SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDING LIMITED;WRAIGHT, PETER;ROSCOE, BRADLEY, A.;THORNTON, JAMES |
发明人 |
WRAIGHT, PETER;ROSCOE, BRADLEY, A.;THORNTON, JAMES |