FIELD: mining.
SUBSTANCE: device relates to mining and can be used for separate operation of two formations of one well. Device comprises housing accommodating control element made in form of spring-loaded gate installed between seats. Spring pressing shutter to seats are located across stroke of gate, pressing to appropriate seat is transverse bending springs.
EFFECT: technical result consists in improvement of energy efficiency of device for separate operation of two formations.
1 cl, 4 dwg
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