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    • 32. 发明授权
    • Pump
    • PUMP
    • US3838945A
    • 1974-10-01
    • US38844973
    • 1973-08-15
    • MOORE L
    • MOORE L
    • E21B43/12F04B47/12F04B17/00
    • F04B47/12E21B43/12
    • A rodless and tubeless pump, especially suited for deep-well pumping installations, has a lower pumping piston that is forced to move through its intake stroke in opposition to the direction of force in the fluid between the upper operating piston and the lower pumping piston during the compression stroke of the operating piston. The lower face of the pumping piston has a greater amount of surface area exposed to pressurized fluid from the operating piston than the upper face, thereby causing the pumping piston to rise during its intake stroke in opposition to fluid thereabove that is forced downwardly by the operating piston during its compression stroke. During the compressionrelease stroke of the operating piston, the pumping piston completes its exhaust stroke by gravity return.
    • 特别适用于深井泵送装置的无杆和无内胎泵具有较低的泵送活塞,其被迫通过其进气冲程移动,与上部操作活塞和下部泵送活塞之间的流体中的力的方向相反, 操作活塞的压缩行程。 泵送活塞的下表面具有比上表面暴露于来自操作活塞的加压流体的更大量的表面积,从而使得泵送活塞在其进气冲程期间上升,与上游的流体相反地向上被迫向下运动 活塞在其压缩冲程期间。 在操作活塞的压缩释放冲程期间,泵送活塞通过重力返回来完成其排气冲程。