DEEP-WELL PUMP UNIT Russian patent published in 2009 - IPC F04B47/06 

FIELD: engines and pumps.

SUBSTANCE: invention relates to pumps and can be used for liquid upwelling. The proposed pump unit comprises a housing, elastic enclosure, reversing motor with its driving shaft coupled with the screw of the rolling feed-nut drive articulated with the housing and the pump drive rod. The rod is fitted tight inside the housing and coupled with the nut via a hollow con rod, an external member of the screw to making with it a flexible point. The housing and elastic enclosure inner spaces are filled with oil. The enclosure outer surface communicates with the well space. Note that the screw and hollow con rod accommodate a damper. Note also that the said hollow con rod is seated in oil-filled elastic enclosure.

EFFECT: higher reliability and expanded applications.

2 cl, 2 dwg