申请人 |
SCHLUMBERGER CANADA LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;NIU, YUQIANG;HE, MIN;LIN, CHEN;WANG, YINLI |
发明人 |
NIU, YUQIANG;HE, MIN;LIN, CHEN;WANG, YINLI |