WELL PUMP Russian patent published in 2009 - IPC F04D13/10 F04D29/70 

FIELD: engines and pumps.

SUBSTANCE: invention is related to oil machine building namely to submersible pumps for pumping of formation liquid from wells. The well pump comprises engine connected to lower pump section by means of suction device in the form of body with holes supplying formation liquid. Pump has shaft with supports, filter installed between body and shaft with creation of annular cavity between them. Filter of suction device comprises at least two module-filters made of filtering elements from permeable material of helical wire "metal rubber". Module-filters are installed at centering skid and are located between shaft supports. Suction device is equipped with collector of mechanical admixtures with channels for their drain into annular space and at least one intermediate shaft support. Lower and intermediate supports of shaft in zone of annular cavity with non-filtered formation liquid are equipped with channels for admixtures passage to collector.

EFFECT: increased quality of filtration, prevention of mechanical admixtures deposits in annular cavity and, therefore, increased efficiency, operational reliability of pump and increased service life to filter regeneration and increased maintainability of pump filtering equipment.

5 cl, 8 dwg