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经营范围
发明名称
Well apparatus
摘要
申请公布号
GB2294068(A)
申请公布日期
1996.04.17
申请号
GB19950019759
申请日期
1995.09.28
申请人
* DRIL-QUIP INC
发明人
BRUCE J * WATKINS;GERLAD W * CROTWELL
分类号
E21B17/08;E21B33/038;E21B33/043;(IPC1-7):E21B17/08;E21B43/10
主分类号
E21B17/08
代理机构
代理人
主权项
地址
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