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发明名称
DRILL STRING VIBRATION DAMPENER
摘要
申请公布号
RU2015295(C1)
申请公布日期
1994.06.30
申请号
SU19915018703
申请日期
1991.11.11
申请人
VELICHKOVICH SEMEN V;SHOPA VASILIJ M;VELICHKOVICH ANDREJ S;YAREMAK OLEG F
发明人
VELICHKOVICH SEMEN V;SHOPA VASILIJ M;VELICHKOVICH ANDREJ S;YAREMAK OLEG F
分类号
E21B17/07;(IPC1-7):E21B17/07
主分类号
E21B17/07
代理机构
代理人
主权项
地址
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