RECOVERABLE APERTURE FILTER Russian patent published in 2012 - IPC B01D29/44 B01D29/62 E21B43/08 

FIELD: process engineering.

SUBSTANCE: invention relates to pull-out of holes, particularly, to filters for cleaning washover fluid from mechanical impurities. Proposed device comprises casing with inlet union, rotary edge filter element fitted on the shaft between top and bottom discs, driven top cover with outlet union, bottom chamber with sediment discharge union, and device to remove sediment from filter element arranged inside the casing. Side surfaces of top and bottom discs are provided with one tooth arranged one above the other. Tooth thrusts are arranged on casing inner wall. Aforesaid device to remove sediment from filter element is made up of brush strip.

EFFECT: reduced costs, faster flushing-out.

4 dwg