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发明名称
EXPANDABLE UNDERREAMER/STABILIZER
摘要
申请公布号
CA2557923(A1)
申请公布日期
2003.08.19
申请号
CA20032557923
申请日期
2003.01.23
申请人
SMITH INTERNATIONAL, INC.
发明人
XU, WEI;DEWEY, CHARLES H.
分类号
E21B10/34;E21B10/26;E21B10/32;E21B17/10
主分类号
E21B10/34
代理机构
代理人
主权项
地址
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