DEVICE FOR PROCESSING WELL LIQUID Russian patent published in 2007 - IPC E21B37/06 

FIELD: oil extractive industry, in particular, devices for feeding chemical reagents into wells for preventing precipitation of salts and paraffin in electric centrifugal pumps and tubing pipes.

SUBSTANCE: device includes body with apertures, connected by upper end to tubing pipe and containing hard reagent, positioned with possible movement of well liquid flow. In accordance to invention hard reagent is placed inside highly penetrable foam-metallic cover, which forms a gap with body and has three-dimensional mesh-cellular structure with dimensions of cells 2-5mm, and specific area of surface of 500-1400 m²/m³, while tubing pipe is provided with self-packing elastic collars, while apertures are made on lower end of body, and also at section of tubing pipe above collars, while apertures on the body have total area comparable to area of apertures on tubing pipe and area of passage cross-section of the latter.

EFFECT: increased evenness of dosing of hard element into flow of drained well liquid under various conditions of operation of oil extractive wells.

4 cl, 2 dwg