FIELD: oil and gas production, extraction of oil through wells. SUBSTANCE: hydraulic well strainer has tube with holes and filtering element comprising set of autonomous sections. Autonomous sections are positioned lengthwise on outer surface of tube. In agreement with invention holes located in one plane perpendicular to tube axis are equipped with non-return valves and lock and are shut off from outside by autonomous section of filtering element. Each section comes in the form of sleeve carrying centralizer and having inner longitudinal conduits and is fixed on outer surface of tube with the help of lock. EFFECT: increased quality of clearing of oil from solid fraction. 3 dwg
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