FIELD: well strainers with alternative ways of flow. SUBSTANCE: well strainer includes lengthened body accommodating permeable section, at least, one alternative way of flow is installed on body and running along body. Body is enclosed with shell closing, at least, one alternative way of flow in course of installation and operation of filter. According to the second version, shell is made cylindrical with many radial holes in its wall. Shell is installed concentrically on body and connected at each end with body to close alternative way of flow in course of installation and operation of filter. EFFECT: protected alternative ways of flow on filter in course of installation and operation. 8 cl, 2 dwg
