发明名称 Double-acting reciprocating downhole pump
摘要 A positive displacement pump for pumping fluids from a downhole formation to the earth's surface is provided. The pump first comprises a plunger. The plunger is reciprocated axially within the wellbore by a linear actuator, such as a submersible electrical pump, in order to form an upstroke and a downstroke. A pump inlet is disposed near the bottom end of the plunger, while a pump outlet is disposed near the top end of the plunger. The pump is configured such that it is able to pump a first volume of fluid upward within the wellbore during the pump's upstroke, and a second volume of fluid upward within the wellbore during the pump's downstroke. Thus, the pump is "double-acting."
申请公布号 US6817409(B2) 申请公布日期 2004.11.16
申请号 US20020167622 申请日期 2002.06.12
申请人 WEATHERFORD/LAMB, INC. 发明人 HOWARD WILLIAM F.
分类号 F04B5/02;F04B11/00;F04B17/04;F04B47/02;F04B47/06;F04B47/14;(IPC1-7):E21B34/00 主分类号 F04B5/02
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