FIELD: mining.
SUBSTANCE: claimed system comprises the flow chamber for fluid to flow there through and shutoff device displacing to the closed position to prevent the fluid flow through the chamber. Said shutoff device can displace to closed position in response to the increase in the ratio between unwanted fluids and required fluids in the fluid composition. The structure can prevent the shutoff device displacement to closed position. Fluid of said composition can flow through the structure to fluid chamber discharge outlet. Said increase in the ratio between unwanted fluids and required fluids in the fluid composition can cause the destruction of structure which resists the shutoff device displacement.
EFFECT: higher reliability of well fluid flow control.
24 cl, 9 dwg
