DEVICE FOR CIRCULATION TREATMENT OF WELL FOR WATER Russian patent published in 1999 - IPC

FIELD: water supply systems. SUBSTANCE: device relates to operation of intakes for underground water and particularly to devices for restoration of capacity of wells by applying reagent methods. Device has string of water lifting pipes together with set of disks secured on pipe string. Disks are installed at fixed intervals from each other. Also provided is filter made in the form of supporting framework with filtering coating. Filter is provided with flexible hose arranged in the form of spiral. Upper end of flexible hose is open for connection with source of pressure, lower end of flexible hose is plugged. Secured on internal surface of filter supporting framework are clamps which are made in the form of horizontal flange and vertical post. Placed in clamps is flexible hose with holes. Connected to flexible hose are head-pieces having spiral-like grooves in internal surface. Grooves are narrowing towards filtering surface and zone of well which surrounds filter. Also located here is flexible pipeline with widening head-piece having spiral-like grooves in internal surface. Head-piece is installed on float which is positioned at mark of dynamic water level in well. Application of aforesaid embodiment of device allows for restoring flow capacity of well zone around filter and of filtering coating. EFFECT: higher efficiency. 1 dwg