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发明名称
dispositivo e método para perfurar o interior de formações geológicas.
摘要
申请公布号
BR0212564(B1)
申请公布日期
2012.05.15
申请号
BR20020012564
申请日期
2002.09.19
申请人
发明人
PETRUS CORNELIS KRIESELS;DJURRE HANS ZIJSLING
分类号
E21B7/00;E21B10/40
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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