发明名称 Swab cup reinforcing member support
摘要 A well swab cup has an annular bushing for supporting a plurality of longitudinally extending reinforcing members within an elastomeric cup like body. The reinforcing members are supported around the periphery of the bushing and extend upward to a mid-portion of the body. A reinforcing member position support assembly is located above the bushing within the body to locate and position the reinforcing members in a spaced relation to each other around the swab cup.
申请公布号 US4265459(A) 申请公布日期 1981.05.05
申请号 US19790036970 申请日期 1979.05.08
申请人 DRESSER INDUSTRIES, INC. 发明人 GREENLEE, DONALD R.;HYDE, BILL J.
分类号 E21B37/10;(IPC1-7):F16J15/56;F16J9/00 主分类号 E21B37/10
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