申请人 |
SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;ALUMBAUGH, DAVID;NICHOLS, EDWARD;CUEVAS, NESTOR |
发明人 |
ALUMBAUGH, DAVID;NICHOLS, EDWARD;CUEVAS, NESTOR |