DEVICE FOR IN-WELL GAS SEPARATION Russian patent published in 2006 - IPC E21B43/38 

FIELD: oil industry, possible use during creation and utilization of in-well gas separation plant in water intake wells in the system for inter-well water transit.

SUBSTANCE: device includes two concentrically positioned pipes, centrifugal type separator with inlet for gas-liquid flow from tubing column, draining unit hydraulically connecting separator to tubular space of tubing string, made in form of tail connected to tubing string, a branch pipe positioned concentrically in the tail with possible creation of hydraulic valve isolating hollows of tubing string and a concentrically positioned pipe of large diameter. Centrifugal type separator is positioned in the tear of tubing string close to well mouth. Large diameter pipe is hermetically connected to tubing string above and below the tear, in lower section tubing string is provided with electric centrifugal pump, and in upper section is connected to ejection line of well at well mouth. Centrifugal type separator is made on upper end of branch pipe closed from above, and connected to lower section of tubing string from below. Separator is connected to upper part of tubing string, divided on two sections by a wall and provided with pipe for draining gas from below the wall into upper part of large diameter pipe, and above the wall has apertures for influx of water into upper part of tubing string. Large diameter pipe on internal side is provided with water level indicator, positioned below the upper end of gas draining pipe, and overflow valve for letting gas into behind-pipe space of well, connected to oil line through reverse valve.

EFFECT: increased efficiency of operation of inter-well water transit system due to provision of separation of gas from extracted water by means of separation with following draining of gas into oil line.

2 dwg