申请人 |
SCHLUMBERGER CANADA LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;ZHANG, PING;ALUMBAUGH, DAVID L.;WILT, MICHAEL |
发明人 |
ZHANG, PING;ALUMBAUGH, DAVID L.;WILT, MICHAEL |