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发明名称
METHOD OF PROVIDING AN EXPANDED-CONTOUR GRAVEL FILTER IN A WELL
摘要
申请公布号
SU730957(A1)
申请公布日期
1980.04.30
申请号
SU19752156460
申请日期
1975.07.16
申请人
PK KONTORA TRESTA "VOSTOKBURVOD"
发明人
DEREVYANNYKH ARKADIJ ,SU;KVASHNIN GRIGORIJ P,SU;KOZHEMYACHENKO BORIS P,SU;KOKHANOV GENNADIJ A,SU
分类号
E21B43/08;(IPC1-7):E21B43/08
主分类号
E21B43/08
代理机构
代理人
主权项
地址
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