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发明名称
Hydraulic downhole hammer
摘要
申请公布号
EP0808987(A3)
申请公布日期
1999.09.29
申请号
EP19970890089
申请日期
1997.05.14
申请人
BOEHLER BAUGERAETE GMBH
发明人
AUER, ANTON;ECKEY, FRIEDHELM, DIPL.-ING.;MEISENBICHLER, KARL, ING.;VOGL, CHRISTIAN, DIPL.-ING.;KNAPITSCH, JOHANNES, ING.
分类号
E21B17/18;E21B21/10;E21B21/12;(IPC1-7):E21B4/14
主分类号
E21B17/18
代理机构
代理人
主权项
地址
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