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经营范围
发明名称
Method of sealing an annulus
摘要
申请公布号
GB0400679(D0)
申请公布日期
2004.02.18
申请号
GB20040000679
申请日期
2002.07.18
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
发明人
分类号
E21B33/12;E21B33/128;E21B43/10
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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