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发明名称
Rotary drill bits
摘要
申请公布号
GB2294069(A)
申请公布日期
1996.04.17
申请号
GB19950019835
申请日期
1995.09.29
申请人
* CAMCO DRILLING GROUP LIMITED
发明人
JOHN * FULLER;ANDREW * MURDOCK
分类号
E21B10/42;E21B10/43;E21B10/54;E21B10/55;E21B10/56;E21B10/567;(IPC1-7):E21B10/46
主分类号
E21B10/42
代理机构
代理人
主权项
地址
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