申请人 |
SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LTD;ZHOU, TONG;CHEN, FELIX;CASE, CHARLES, R.;ELLIS, DARWIN, V.;ROSCOE, BRADLEY, ALBERT |
发明人 |
ZHOU, TONG;CHEN, FELIX;CASE, CHARLES, R.;ELLIS, DARWIN, V.;ROSCOE, BRADLEY, ALBERT |