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发明名称
摘要
申请公布号
FR2147974(B1)
申请公布日期
1976.10.29
申请号
FR19720024148
申请日期
1972.07.04
申请人
MOBIL OIL CORP
发明人
分类号
E21B47/18;G03G15/00;(IPC1-7):21B47/00;06B1/00;16K5/00
主分类号
E21B47/18
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代理人
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