Patent ID: 8257055

Claim:
A system for pumping multiphase fluids, the system comprising: a compressor that is constructed and arranged to receive gas from a gas source selected from the group consisting of lift gas, export gas, and underground steam and compress the gas to provide a HP gas supply having a pressure in the range 50-150 bar; a cyclone-type phase separator that is connected to receive a LP multiphase fluid, and is constructed and arranged to separate a LP gas phase and a LP liquid phase from the LP multiphase fluid; a knock-out vessel for removing retained liquid from the separated LP gas phase, having an inlet connected to receive the LP gas phase from the phase separator, a LP gas outlet and a LP liquid outlet; a gas-gas jet pump having a LP inlet connected to receive the LP gas phase from the knock-out vessel, a HP inlet connected to receive a HP gas supply from the compressor, and an outlet for providing outlet gas at a pressure higher than that of the LP gas phase; and a liquid pump comprising a positive displacement pump having a LP inlet connected to receive the LP liquid phases from the phase separator and the knock-out vessel, and an outlet for providing outlet liquid at a pressure higher than that of the LP liquid phases.