METHOD FOR LIFTING GAS-FLUID MIXTURE FROM METALS AND DEEP-WELL PUMPING UNIT FOR ITS EMBODIMENT Russian patent published in 1997 - IPC

FIELD: oil producing industry, in particular, plants for lifting well gas-fluid mixtures. SUBSTANCE: well products coming from formation directly enters the tubing lowered down to perforation holes or when tubing shoe is located at the preset height from bottom hole. Well products lifted through tubing, tubing shoe, above zone of degassing, pass evaporating ejector regulator where degassing is intensified due to abrupt widening of cross-section, separation of light fractions from heavy ones, additional evaporation and ejection. This is attained by application of double-chamber deep-well pumping unit with two plungers and separating partition. Reciprocation of plungers in chambers results in formation of rarified space promoting additional separation of gas from products coming from well which is amplified by suction action of plungers and ejector located in hollow rod of lower plunger. EFFECT: higher efficiency. 3 cl, 1 dwg