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经营范围
发明名称
Einrichtung zum Durchfuehren von Arbeitsgaengen an dem Bohrlochkopf einer Unterwasser-Tiefbohrung
摘要
申请公布号
DE1150638(B)
申请公布日期
1963.06.27
申请号
DE1961S073641
申请日期
1961.04.24
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N. V.
发明人
JOHNSON GLENN DONNELL
分类号
E21B41/04
主分类号
E21B41/04
代理机构
代理人
主权项
地址
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