SLOT-TYPE WELL STRAINER Russian patent published in 2013 - IPC E21B43/08 

FIELD: oil and gas industry.

SUBSTANCE: device includes framework, slot-type filtering element made of shaped wire mounted on framework, settling tank connected to framework and upper connection pipe connected to pump inlet. Settling tank is filled with reagent on the surface of which there are granules with positive buoyancy. At the bottom of settling tank there is a metering unit to supply reagent into the well.

EFFECT: increase of operational life at combined action of complicating factors, enlarging of functional capabilities.

3 cl, 1 dwg