DEVICE FOR METERED CHEMICAL REAGENT SUPPLY Russian patent published in 2007 - IPC E21B37/00 F17D1/16 

FIELD: oil and gas production, particularly devices for metered liquid chemical reagents supply in oil and gas pipelines or wells.

SUBSTANCE: device comprises chemical reagent vessel having hollow reagent discharge line to supply chemical reagent in product pipeline interior. Device also has gas accumulation chamber adapted to supply gas from product pipeline interior into chemical reagent vessel, gas pipeline provided with pressure difference stabilizer made as separate partition with calibrated orifice arranged in upper gas line part. The orifice provides constant chemical reagent column height to hydraulically resist ascending gas bubbles. Device comprises siphon with outlet pipe having partition with metering orifice installed therein so that the partition may be forcedly displaced. Gas accumulation chamber is made as vertical cylindrical vessel having siphon in central part thereof. The siphon is made as transversal sealed upper and lower partitions and hollow bush concentrically arranged with respect to cylindrical vessel. The hollow bush is sealed relatively lower partition connected with upper part through pipeline. Lower part of gas accumulation chamber is communicated with chemical reagent vessel through hollow discharge reagent pipeline from hollow bush outside. The reagent pipeline is directed downwards through lower partition. Gas accumulation chamber interior arranged over upper partition is connected with upper part of chemical reagent vessel.

EFFECT: simplified device assemblage in product pipeline, prevention of condensed gaseous product content ingress from product pipeline into gas accumulation chamber during device operation.

1 dwg