发明名称 APPARATUS AND METHOD FOR PUMPING FLUID
摘要 <p num="1">An apparatus for pumping fluid, the apparatus comprising a pumping section (32) having an inlet (33) and an outlet (38), a shaft (22) to suck fluid through the inlet (33) and pump fluid out the outlet (38) and a power section (20) for moving the shaft (22) in a reciprocating motion, characterised in that the power section (20) comprises a permanent magnet linear motor (20) for moving the shaft (22) in a reciprocating motion.
申请公布号 CA2650386(C) 申请公布日期 2013.04.16
申请号 CA20062650386 申请日期 2006.12.07
申请人 NATIONAL OILWELL VARCO, L.P. 发明人 URQUHART, RICHARD
分类号 F04B17/04;F04B23/06 主分类号 F04B17/04
代理机构 代理人
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