FIELD: water supply. SUBSTANCE: well for using water bearing horizon has two vertical pump-compressor strings placed in casing string. A pump is installed at the end of casing string. Gate valve is plate at top of the second casing string. The gate valve is installed so to provide coaxial position of its cross section and cross section of casing string. The above cross sections are equal. Lock is installed at another end of the gate valve. EFFECT: high reliability. 1 dwg
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