FACE DEVICE FOR GAS-LIFT OPERATION OF WELLS Russian patent published in 2005 - IPC

FIELD: oil industry.

SUBSTANCE: device has column of raising pipes with launch valves and working valve and packer for isolating behind-pipe space. According to invention raising pipes are provided with device with gas pipe with apertures in lower portion and with stop on its lower base for adjusting series of feeding of liquid or gas into raising pipes. Packer is lowered on hoisting pipe. These pipes below device for adjustment are perforated and provided with check valve. Device for adjustment is mounted in placed for positioning working valve, connected to behind-pipe space through gas pipe and provides for possible pressing out of bed liquid into hoisting pipes until phase separation level between bed liquid and gas is decreased below aperture in gas pipe. After that device provides for possible influx of gas only into hoisting pipes until level of phase separation inside hoisting pipes is higher than working valve.

EFFECT: broader functional capabilities of device.

2 dwg