DEVICE FOR CHEMICAL INJECTION IN WELL, SURFACE EQUIPMENT AND METHOD OF CHEMICAL INJECTION Russian patent published in 2015 - IPC E21B37/06 

FIELD: oil and gas industry.

SUBSTANCE: method includes the device with chemical location in the wellbore or at tube side of the surface oil production equipment, chemical dissolving by the produced liquid. As device for chemical injection made in form of a container out of sections and secondary regulated dosing devices. Each container section has one or several cartridges with chemical. From ends the cartridge is covered by plugs with regulated primary dosing devices or from one end by blind plug, and from another end by plug with regulated primary dosing devices. The cartridges are secured by the securing devices. The regulated secondary dosing devices are located in that part of the container sections that is created between the regulated primary devices and blind plug of the container section or end of the container section, or another cartridge.

EFFECT: improved dosing, assurance of device production effectiveness, excluded chemical losses during transportation.

2 cl, 3 dwg