FIELD: oil industry, applicable at production and conveying of oil over pipe-lines. SUBSTANCE: the upper part of the device container communicates with a gas collector in the oil pipe-line through a gas conduit furnished with an actuator valve. Metered supply of reagent to the container is effected due to the pressure head of reagent in the container at equalization of pressure in the container and oil pipe-line. EFFECT: enhanced reliability of supply of reagent in any section of oil pipe-line with lowest capital and operating investment. 1 dwg
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