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发明名称
EQUIPMENT FOR USE IN DRILLING OFFSHORE WELLS
摘要
申请公布号
GB1247646(A)
申请公布日期
1971.09.29
申请号
GB19700029651
申请日期
1970.06.18
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V.
发明人
FRANCOIS VAN DAALEN
分类号
E21B7/124;E21B7/128
主分类号
E21B7/124
代理机构
代理人
主权项
地址
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