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发明名称
Sucker rod pump
摘要
A subsurface well pump is provided which is resistant to vapor locking. The pump is a reciprocating sucker rod pump which has a top inlet valve, and a means to vent vapors from the barrel of the pump on each stroke.
申请公布号
US5108272(A)
申请公布日期
1992.04.28
申请号
US19910661368
申请日期
1991.02.27
申请人
SHELL WESTERN E & P INC.;SHELL CANADA LIMITED
发明人
BREWER, JAMES R.;LENTZ, WAYNE D.
分类号
E21B34/12;F04B47/02
主分类号
E21B34/12
代理机构
代理人
主权项
地址
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