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发明名称
DRILLING DEVICE COMPRISING IN SITU INTERCHANGEABLE CUTTING MEANS
摘要
申请公布号
RO112529(B1)
申请公布日期
1997.10.30
申请号
RO19950002165
申请日期
1994.06.15
申请人
DOWN HOLE TECHNOLOGIES PTYLTD, MYAREE, WEST AUSTRALIA
发明人
MCLEOD GAVIN THOMAS;EGAN MATTHEW VANCE
分类号
E21B7/00;E21B10/02;E21B10/62;E21B10/64;E21B10/66;E21B23/03;E21B25/02;(IPC1-7):E21B23/03
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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