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发明名称
FORAGE DE PUITS AVEC UNITE DE COMMANDE AU SOMMET
摘要
申请公布号
FR2531479(B1)
申请公布日期
1986.12.05
申请号
FR19830012805
申请日期
1983.08.03
申请人
VARCO INTERNATIONAL INC
发明人
GEORGE I. BOYADJIEFF
分类号
E21B3/02;E21B19/02;E21B19/16;(IPC1-7):E21B19/02
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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