申请人 |
SCHLUMBERGER CANADA LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;SMITH INTERNATIONAL, INC.;PRAD RESEARCH AND DEVELOPMENT LIMITED |
发明人 |
UTTER, ROBERT, D.;DESAI, PRAFUL, C.;SWADI, SHANTANU, N.;LAND, JAMES, L. |