WELL PUMP Russian patent published in 2010 - IPC F04D13/10 

FIELD: engines and pumps.

SUBSTANCE: proposed well pump comprises motor connected with the bottom pump section via suction device that has shaft running in bearings, head, base, filter made from filtration elements and representing tubular element made from permeable material of coiled "rubberised metal" wire. Suction device comprises at least two cartridges and at least one nipple. Said cartridges are arranged between the head and base and are interconnected by nipple wherein the shaft intermediate bearing is fitted. Every cartridge represents a perforated casing and incorporates the filter arranged outside of the casing. Said filter is mounted on centraliser arranged between the casing and filter. Each cartridge is furnished with at least one shim.

EFFECT: higher efficiency and reliability, longer life, easier repair and assembly/disassembly.

8 cl, 9 dwg