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经营范围
发明名称
Cutting element,drill bit,system and method for drilling soft plastic formations
摘要
申请公布号
GB9819092(D0)
申请公布日期
1998.10.28
申请号
GB19980019092
申请日期
1998.09.03
申请人
BAKER HUGHES INCORPORATED
发明人
分类号
E21B10/56;E21B10/567
主分类号
E21B10/56
代理机构
代理人
主权项
地址
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