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发明名称
Method of and apparatus for cleaning down well valves of well pumps in situ
摘要
Pump valves are flushed by accelerated fluid flow therethrough induced by moving the pump rods through an accelerated downstroke.
申请公布号
US4098340(A)
申请公布日期
1978.07.04
申请号
US19770814885
申请日期
1977.07.12
申请人
STEELE, BARNEY RAYMOND;HOLIMAN, WILLIAM E.
发明人
STEELE, BARNEY RAYMOND;HOLIMAN, WILLIAM E.
分类号
E21B37/00;E21B43/12;F04B47/04;(IPC1-7):E21B37/00;E21B43/00
主分类号
E21B37/00
代理机构
代理人
主权项
地址
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