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经营范围
发明名称
Subsea wellhead apparatus
摘要
申请公布号
GB2339444(B)
申请公布日期
2002.05.29
申请号
GB19990014048
申请日期
1999.06.16
申请人
* DRIL-QUIP, INC.
发明人
BRUCE J * WATKINS
分类号
E21B33/043;E21B33/047;E21B34/04;(IPC1-7):E21B33/043;F16L37/38
主分类号
E21B33/043
代理机构
代理人
主权项
地址
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