DEEP-WELL VAPOR-FLUID PUMP Russian patent published in 1997 - IPC

FIELD: oil producing industry; may be used in production of water, water-oil emulsions, pumping-out of aqueous solutions from wells, for instance, in underground leaching of ores. SUBSTANCE: pump has additional vessel installed coaxially with pump chamber made in the form of two coaxial cylindrical tubes. Central tube ends are provided with suction and pressure valves. Installed in pump lower chamber are branch pipes connecting hollows of chamber and additional vessel. EFFECT: extended range for regulation of working parameters, reduced operation cycle and provision of pump location inside well confined by sizes of casing. 1 dwg