WATER WELL STRAINER Russian patent published in 1999 - IPC

FIELD: construction and operation of water wells. SUBSTANCE: strainer has supporting structure with filtering coating and flexible hose located in the form of exterior of filtering coating and plugged from below. Hose upper end is opened for connection with pressure source. Located on flexible hose on exterior of filtering coating are attachment with nozzles expanding towards flow of wash substance and having spiral grooves. Attachments are staggered on exterior of filtering coating over strainer height and directed with their outlet holes alternately, one, to water-bearing bed and the other to filtering coating. EFFECT: higher efficiency of well. 2 dwg