WELL GAS-LIFT OPERATION METHOD Russian patent published in 2013 - IPC E21B43/00 

FIELD: oil and gas industry.

SUBSTANCE: well gas-lift operation method consists in accumulation of liquid and gas in the well, interruption of flow of gas-liquid mixture and gas in column of lift pipes at the installation depth of working valve at reduction of dynamic liquid level in annular space of the well and decrease of bottomhole pressure value to the specified minimum limit. New feature of the method is that at the moment of accumulation of liquid column in the column of lift pipes of the specified height, simultaneously with gas supply from annular space to column of lift pipes, there activated is dosing pump and supplied is surface active substance to column of lift pipes, where surface active substance together with gas from annular space forms a foam layer of design height, and when the specified pressure drop value is achieved between pressure in annular space of well and pressure in column of lift pipes, gas supply to column of lift pipes is stopped.

EFFECT: reduction of gas flow for production of unit of well product.

1 dwg