WELL FILTER Russian patent published in 1994 - IPC

FIELD: oil industry. SUBSTANCE: filter has connected to each other adapters of telescopic type, a casing and a skeleton with filtering holes, that form ring type cavity, in which a filler of the filter and a spring are located. A guiding saddle is connected with the skeleton frame. Besides, the filter has a stopper, mounted on the guiding saddle. Filtering holes of the casing and the skeleton are made in parallel and filtering holes of the casing are located perpendicularly to filtering holes of the skeleton. The spring is placed in the filler of the filter. Height of pressed spring corresponds to the height of the ring type cavity in limits of the filler of the filter. Members of right geometric form with flat surfaces are used as the filler of the filter. Broken glass with flat surfaces is also used as the filler. EFFECT: filter has higher operational reliability. 4 dwg