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发明名称
PROGRESSIVE CAVITY DRILLING APPARATUS WITH FLOW RESTRICTOR
摘要
申请公布号
EP0460202(A4)
申请公布日期
1992.06.03
申请号
EP19910903007
申请日期
1990.12.20
申请人
IDE, RUSSELL D.
发明人
IDE, RUSSELL D.
分类号
E21B4/02;(IPC1-7):F04C2/00
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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