申请人 |
SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT N.V.;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;ALUMBAUGH, DAVID;CHEN, JIUPING;MORRISON, FRANK |
发明人 |
ALUMBAUGH, DAVID;CHEN, JIUPING;MORRISON, FRANK |