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发明名称
MEKANISK RETNINGSBORING-STOETER.
摘要
申请公布号
NO872305(D0)
申请公布日期
1987.06.02
申请号
NO19870002305
申请日期
1987.06.02
申请人
DAILEY PETROLEUM SERVICES CORP
发明人
TENG, CHUAN C.;CHAPELLE, RENE A.;BLACKLAWS, JOHN E.;MCCOMSEY, LEE E.
分类号
E21B7/08;E21B7/04;E21B31/107;(IPC1-7):E21B/
主分类号
E21B7/08
代理机构
代理人
主权项
地址
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