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发明名称
DRILLING TOOL CENTRALIZER
摘要
申请公布号
RU2055144(C1)
申请公布日期
1996.02.27
申请号
RU19920009161
申请日期
1992.11.30
申请人
BIRMAN VALERIJ A;YAKIMOV VADIM P;PEREGUDOV ALEKSANDR A;RUMYANTSEV ROMUALD A;ZAGORSKIJ GENNADIJ S
发明人
BIRMAN VALERIJ A;YAKIMOV VADIM P;PEREGUDOV ALEKSANDR A;RUMYANTSEV ROMUALD A;ZAGORSKIJ GENNADIJ S
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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