FIELD: oil extractive industry.
SUBSTANCE: device has container for reagent, connected by dosing line to output line, line for connecting container for reagent to behind-pipe space with additional latch for decreasing pressure from behind-pipe space, latches in outlet line and connection line for container and behind-pipe space, branch pipe for feeding reagent into container. Container for reagent is provided with piston with rod. Rod hollow is connected to dosing and outlet line, and rod-less - only to outlet one. Dosing line is combined with connection line for container and behind-pipe space while providing for possible dosing as into outlet line, as into behind-pipe space. Dosing line is provided with choke. Branch pipe for feeding reagent into container is placed in rod hollow. Container for reagent is provided with means for measuring reagent flow.
EFFECT: broader functional capabilities, higher flow precision.
3 cl, 1 dwg
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