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    Low volume variable rpm submersible well pump
    3.
    发明授权
    Low volume variable rpm submersible well pump 失效
    低容量可变转速潜水井泵

    公开(公告)号：US4678404A

    公开(公告)日：1987-07-07

    申请号：US822358

    申请日：1986-01-24

    申请人： Jerzy A. Lorett ,  Joseph E. Vandevier

    发明人： Jerzy A. Lorett ,  Joseph E. Vandevier

    IPC分类号： F04D15/00 ,  F04B49/06

    CPC分类号： F04D15/0066 ,  Y10S415/901

    摘要： A low volume submersible pump assembly has features to stabilize the operation. The pump assembly includes a centrifugal pump driven by a submerged electrical motor. The centrifugal pump has an impeller configuration that is designed for high specific head, but potentially unstable operation. At the design speed, the pump potentially could deliver an indeterminate flow rate for a given head. Also, at the design speed, the design flow rate will yield a design head that is very close to the maximum head at zero flow. The pump has the characteristic of requiring a significant increase in torque to produce higher flow rates. To stabilize the potentially unstable pump, a variable speed drive varies the speed of the motor to maintain constant torque. Maintaining a constant torque allows a considerable variance in head with only a small variance in flow rate resulting.

    摘要翻译： 低体积潜水泵组件具有稳定操作的特征。 泵组件包括由浸没式电动机驱动的离心泵。 离心泵具有叶轮结构，其设计用于高特定头部，但是操作可能不稳定。 在设计速度下，泵可能为给定的头部提供不确定的流量。 另外，在设计速度下，设计流量将产生非常接近零流量最大头部的设计头。 该泵具有要求显着提高扭矩以产生较高流速的特性。 为了稳定潜在不稳定的泵，变速驱动器改变电机的速度以保持恒定的转矩。 保持恒定的扭矩允许在头部有相当大的变化，只有微小的流量差异导致。

    Thrust balancing device for a progressing cavity pump
    4.
    发明授权
    Thrust balancing device for a progressing cavity pump 失效
    推进式平衡装置用于进气腔泵

    公开(公告)号：US4669961A

    公开(公告)日：1987-06-02

    申请号：US860152

    申请日：1986-05-06

    申请人： Jerzy A. Lorett

    发明人： Jerzy A. Lorett

    IPC分类号： F04C15/00 ,  F04C2/107 ,  F04B47/14

    CPC分类号： F04C15/0042

    摘要： A thrust reducing apparatus for a progressing cavity pump used in a well and driven by a submersible pump motor. A piston is mounted to the top of the rotor and located in a bore between the stator and the tubing which extends to the surface. A bypass passage enables fluid discharged from the pump to flow past the bore and the piston. An annulus passage extends into the bore above the piston for communicating fluid pressure in the annulus to the top of the piston. The lower side of the piston is exposed to discharge fluid pressure from the pump, resulting in a net upward force on the piston. The piston pulls upwardly on the rotor to reduce the downward thrust on the rotor.

    摘要翻译： 用于井中并由潜水泵马达驱动的进气腔泵的推力减小装置。 活塞安装在转子的顶部并且位于定子和延伸到表面的管道之间的孔中。 旁通通道使得从泵排出的流体流过孔和活塞。 环形通道延伸到活塞上方的孔中，用于将环形空间中的流体压力传递到活塞的顶部。 活塞的下侧暴露于从泵排出流体压力，导致活塞上的净向上的力。 活塞在转子上向上拉动，以减小转子上的向下推力。