ELEVATOR OF INTER-WELL GAS-LIFT Russian patent published in 2006 - IPC E21B43/00 

FIELD: oil extraction, in particular, engineering of devices using during inter-well gas-lifting operations.

SUBSTANCE: device contains lifting pipe column with throttle and two packers with circulation valves, mounted above perforation interval of gas head and perforation interval of oil level. In accordance to invention it is additionally provided by external pipes column, concentric relatively to lifting pipes column, containing aforementioned packer with circulation valve. It is mounted above perforation interval of gas head. Cylindrical cone is made on lower end, which provides for gravitational precipitation of sand grains in gas flow. In its zone, throttle is positioned on lifting pipes column. Lifting pipes column is longer than external pipes column for value, equal to gas head perforation interval. Device has disconnecting piece, positioned under the throttle.

EFFECT: expanded functional capabilities due to restoration of circulation in case when maintenance, washing, stopping or launching of well are necessary, and also prevented blockage of throttle.

2 dwg