FIELD: mechanical engineering; pumps.
SUBSTANCE: invention can be used for transfer of gas-liquid media consisting, for instance, of crude oil and natural gas. Proposed multiphase screw pump has housing accommodating at least one feed screw enclosed in cylindrical least one pressure branch pipe. Suction branch pipe communicates with suction space located before feed screw. Pressure branch pipe communicates with delivery space located after feed screw. Delivery space is provided with device to separate liquid phase from gas phase in medium flow getting of feed screw and lower section to receive separated liquid phase. Lower section of delivery space is provided with additional space located under cylindrical bushing. Tubes are secured by upper ends in radial holes of cylindrical bushing. Lower ends of said tubes are located at lower base of additional space under liquid level. Lower section of delivery space and additional space are in communication.
EFFECT: simplified design, increased efficiency of pump when eliminating gas locks.
2 dwg
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