METHOD AND GAS-LIQUID SYSTEM FOR MULTISTAGE GAS EXTRACTION FROM DOWNHOLE GAS-LIQUID MIXTURE Russian patent published in 2017 - IPC E21B43/34 B01D19/00 

FIELD: oil and gas industry.

SUBSTANCE: method for multistage gas extraction from a downhole gas-liquid mixture includes a pressure input of a gas-liquid mixture flow through a supply line into a vertical chamber of the first stage separator tangentially guiding its cylindrical shell, swirling the flow into a descending spiral, removing partially dried gas from the upper part of the chamber and removing partially degassed liquid from the bottom of the chamber. At the same time, the flow of partially dried gas from the chamber of the first separation stage is further sent to the gas-dryer separator, from the gas outlet of which dried gas is obtained. The separated liquids and gas condensate, produced at the liquid outlet of the gas-dryer separator, are directed to the suction inlet of the ejector installed at the inlet of the first stage separator. The gas-liquid system includes a pipeline supplying a gas-liquid mixture, a first stage separator containing a shell, in the form of a circular cylinder, arranged vertically. At the same time, at least one gas-dryer separator is included in the system, and an ejector is connected to the supply line of the downhole mixture at the inlet of first stage the separator, to the suction inlet of which a pipeline is connected from the liquid outlet of the gas-dryer separator.

EFFECT: improved quality of gas-liquid mixture separation by extracting gas without additional energy-intensive equipment.

5 cl, 2 dwg