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发明名称
APPARATUS FOR FILLING DRILLING PIPE STRING BY LIQUID
摘要
申请公布号
SU859620(A1)
申请公布日期
1981.08.30
申请号
SU19792771353
申请日期
1979.05.21
申请人
VOLGOGRADSKIJ GNI PI NEFTYANOJ PROMYSHLENNOSTI
发明人
DZHIGIR NIKOLAJ L,SU;SUKHONOSOV GEORGIJ D,SU
分类号
E21B49/00;(IPC1-7):E21B49/00
主分类号
E21B49/00
代理机构
代理人
主权项
地址
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