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УДК 628.112.2

ALEKSEEV V. S., Martintsov S. M.

On regulatory identification of well filter design

Summary

The present day regulatory framework of design and construction of underground water intakes does not regulate the methods of dril­ling and equipping wells with filters provided the wells are operating for a significantly long period (depreciation) of 15–20 years regardless of the composition of abstracted water and water-bearing strata. Under the circumstances the problem of maintaining the continui­ty of the traditional (from the Soviet period) multiple-times approbated recommendations focused on the long-term operation of the water intakes with minimization of the water abstraction and supply to the users becomes timely. As a basis of this approach the use of filter prototypes – analogues manufactured in Russia on commercial scale that predeterminedly ensures the efficient well operation is suggested. The performances of well frameless slotted filter, the analogue of Johnson filter (USA) and (by a number of parameters) of carcass-framed and spiral-wire filters, recommended for use in SNiP 2.04.02-84 are considered. Manufacturing well frameless slotted filter on commercial scale with the use of high-tech equipment ensures the precision size of the slot, required structural integrity and rigidity that allow eliminating wire shift during transportation and erection of the filter in the well. Hydrodynamic and hydraulic evalua­tion of the well frameless slotted filter was carried out. The data of the comprehensive evaluation of filter resistance is presented with account of internal head losses, corrosion and suffosion resistance, chemical and biological mudding parameters of wells equipped with frameless slotted filters as well as of maintainability.

Key words

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