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发明名称
THREADED JOINT OF DRILL PIPES
摘要
申请公布号
SU1435747(A1)
申请公布日期
1988.11.07
申请号
SU19864169193
申请日期
1986.12.24
申请人
VNII BUROVOJ TEKHNIKI
发明人
SHCHERBYUK NIKOLAJ D,SU;ZHAROV VLADIMIR N,SU;YAKUBOVSKIJ NIKOLAJ V,SU;DUBLENICH YURIJ V,SU;LISKANICH MIKHAIL V,SU
分类号
E21B17/042;B23Q17/09;E21B12/02
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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