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发明名称
HEAT-INSULATED DRILL STRING
摘要
申请公布号
SU829852(A1)
申请公布日期
1981.05.15
申请号
SU19792768592
申请日期
1979.05.11
申请人
PECHORSKIJ G NAUCHNO- I PI NEFTYANOJ PROMYSHLENNOSTI
发明人
ALEKSANDROV ALEKSEJ R,SU;DYUDIN GENNADIJ I,SU;KOROLEV IGOR P,SU;RUZIN LEONID M,SU;TIMOSHIN SERGEJ V,SU
分类号
E21B17/00;E21B43/00;(IPC1-7):E21B17/00
主分类号
E21B17/00
代理机构
代理人
主权项
地址
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