MULTI-PHASE SCREW PUMP Russian patent published in 2009 - IPC F04C2/16 

FIELD: engines and pump.

SUBSTANCE: invention relates to pumping over multi-phase media, namely to two-screw pumps to be used for pumping out associated gas. Proposed pump comprises housing 1 with intake 2 and discharge 3 branch pipes. Note that the former communicates with suction chamber 4, while the latter communicates with discharge chamber 5. Feed screws 6 and 7 are arranged inside bores of housing 1 to make closed pressure chambers 10 between the screw ledges and recesses of closed pressure chambers 10. Holes arranged in housing 1 along the screw communicate wit bypass line that feeds medium into pressure chamber 10. Bypass line communicates with gas-fluid separator lower chamber, the separator being arranged at the pump outlet. Holes in housing 1 communicate, via separate lines, with bypass line. Pipeline feeding fluid into first pressure chamber, separated from suction chamber, incorporates fluid cooler connected electrically with pump outlet medium temperature pickup.

EFFECT: higher efficiency.

2 dwg