DEVICE FOR SUPPLYING REAGENT TO WELL Russian patent published in 2023 - IPC E21B37/06 

FIELD: oil and gas industry.

SUBSTANCE: devices for supplying and dosing chemical reagents into oil wells. The device includes a capillary tube lowered into the lift string with a reagent supply tip located after the descent at a depth below the beginning of the formation of deposits on the walls of the lift string to supply the reagent into the fluid flow produced by the downhole pump. When descending into the elevator column, the capillary tube is designed to be mounted on the column with rods equipped with external centralizers that prevent interaction of the capillary tube with the walls of the elevator column. The reagent supply tip is made in the form of a cylindrical body with identical nozzles, located evenly along the perimeter and height of the tip with a total cross-section that provides the required amount of reagent supplied to the elevator string in the form of corrosion inhibitors, solvents of paraffin deposits, scale deposits and/or demulsifiers, with a passage channel of the capillary tube is made with a cross section larger than the total cross section of the nozzles.

EFFECT: functionality of the device is expanded due to the possibility of pumping various liquid reagents, as well as using the device in inclined, horizontal and/or complex structured wells.

2 cl, 1 dwg