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发明名称
Drill bits
摘要
申请公布号
GB2364079(B)
申请公布日期
2004.11.17
申请号
GB20000015714
申请日期
2000.06.28
申请人
RENOVUS LTD;WEATHERFORD LAMB
发明人
PIA GIANCARLO TOMASSO PIETRO
分类号
E21B10/34;(IPC1-7):E21B10/34;E21B7/28;E21B10/26
主分类号
E21B10/34
代理机构
代理人
主权项
地址
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