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发明名称
CENTRALIZER FOR DRILL RODS
摘要
申请公布号
RU2085698(C1)
申请公布日期
1997.07.27
申请号
RU19930020750
申请日期
1993.04.21
申请人
VOSTOCHNYJ NAUCHNO-ISSLEDOVATELSKIJ GORNORUDNYJ INSTITUT
发明人
KONANYKHIN ALEKSANDR I;VASILKOV VASILIJ K;GOLDOBIN VIKTOR V;KONANYKHIN VASILIJ A;MAKARENKO MIKHAIL B;DAVYDOV VALERIJ E
分类号
E21B17/10;(IPC1-7):E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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