The water reception of the part should be cheap enough, have, if possible, the smallest size, have sufficient strength and allow the possibility of light cleaning of the input holes. By the type of water intake, the tubular wells are divided into the following groups: 1) wells with mesh, gravel and hole filters, 2) nonsense wells. The need to install in the tubular well of the filter depends on the structure and properties of an aquifer that feeds the well with water.
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The type and design of the filter is selected depending on the composition of the soils, hydrogeological features of the aquifer and the technical capabilities of the organization, which produces drilling. Consider the recommended types of filters for various categories of soils of aquifers. The greatest distribution is the mesh filters that consist of a frame, wire winding and a metal grid. Filter frames are made from drilling pipes. The manufacture of the filter is as follows. On a pipe designed for the filter, marking of the filter part, sump and deaf part are made. The length of the filter part, depending on the power of the aquifer, is taken from 1 to 5 m. The length of the sump and the dull part are taken at least 1 m. In the case of long filters, the latter are made of several pipes, flexible couplings. On the filter (working) part, holes are drilled, which are located in a checkerboard pattern. The distance between the centers of the holes is determined in accordance with their diameter, but is usually accepted so that the area of all holes is at least 20% of the surface of the filter part of the pipe. To increase the filter area, the opening of the holes is used or the winding of the working part of the pipe with wire is made.