WELL TYPESET FILTER Russian patent published in 2009 - IPC E21B43/08 

FIELD: oil-and-gas production.

SUBSTANCE: invention related mining industry, particularly to oil-and-gas production and can be used for gas and oil wells development. Well typeset filter includes perforated pipe with connecting parts, one of each executed as a sleeved, another nipple shaped. Concentrically to pipe installed providing drainage filtering element, made of rings. The filtering element rings executed with internal rectangular shoulders for centering on the pipe and internal diametre. Rings ends are in touch, at one of them or both there are notches, widening from internal surface to the filter axis. Also notches made tangentially and crossed.

EFFECT: simplification of manufacturing process and filter colmation reduction during oil and gas production.

10 cl, 12 dwg