Patent ID: 8858154

Claim:
A pump system for pumping of multiphase mixtures, comprising: a pumping apparatus for multiphase mixtures with at least one liquid phase and at least one gaseous phase, wherein the pumping apparatus comprises: one or more axial compression stages, each of the axial compression stages comprising an axial or semi-axial impeller; and one or more pumping stages, each of the pumping stages comprising a radial impeller, wherein the pumping stages adjoin the axial compression stages; a separator at an inlet side of the pumping apparatus to separate the gaseous phase or a portion thereof; and a gas discharge line connected to the separator, wherein the system is configured for the gaseous phase or the portion thereof to exit the apparatus through the gas discharge line without any additional pump; and a return line at an output side of the pumping apparatus to return multiphase mixture into the separator.