METHOD AND DEVICE FOR LIFTING GAS-LIQUID MIXTURE IN WELLS Russian patent published in 1998 - IPC

FIELD: oil and gas production industry. SUBSTANCE: according to method, lifting of liquid by deep well pump is realized with utilization of gas energy and hydrostatic pressure of column of gas-liquid mixture which is located above pump intake. Liquid is delivered to deep well pump from top to bottom through annular space isolated from bottom hole with separation of gas. Gas is withdrawn and its lifting energy is spread over entire bore-hole of well. By utilizing pressure of degassed liquid column, part of load from mass of well product being lifted through column is removed. Device has deep well pumps, suction and delivery valves, strings of rods and pipes, and gas overflow valves. Lower pump is of single-action type with circular passage between body and housing and receiving chamber. Upper pump is made with double-action piston, side-located suction and delivery valves. Both pumps are connected to each other. Also provided is gas separator-demulsifier. Aforesaid arrangement of equipment allows for more full utilization of various kinds of potential energy contained in well product itself for enhancing efficiency in operating wells by deep-well sucker rod pumps. EFFECT: higher efficiency. 3 cl, 1 dwg