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发明名称
ARRANGEMENT FOR DRILLING STRING FOR DIRECTIONAL DRILLING
摘要
申请公布号
SU878895(A1)
申请公布日期
1981.11.07
申请号
SU19792823176
申请日期
1979.09.20
申请人
PECHORSKIJ GNI PI NEFTYANOJ PROMYSHLENNOSTI
发明人
BUSLAEV VIKTOR F,SU;GELFGAT YAKOV A,SU;LOPATIN YURIJ S,SU;NIKOMAROV SAMUIL S,SU
分类号
E21B7/08;(IPC1-7):E21B7/08
主分类号
E21B7/08
代理机构
代理人
主权项
地址
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