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发明名称
BIT FOR ROTARY DRILLING
摘要
申请公布号
RU2061831(C1)
申请公布日期
1996.06.10
申请号
RU19930057510
申请日期
1993.12.28
申请人
SEVERO-KAVKAZSKIJ NAUCHNO-ISSLEDOVATELSKIJ INSTITUT PRIRODNYKH GAZOV
发明人
DUBENKO VALERIJ EVSEEVICH;DEVYATOV EVGENIJ VASILEVICH;FEDOROVA NATALYA GRIGOREVNA
分类号
E21B10/26;(IPC1-7):E21B10/26
主分类号
E21B10/26
代理机构
代理人
主权项
地址
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