Patent ID: 8521450
Filing Date: 2013-08-27
Classification: G01F

Abstract:
1. A method for measuring flow rates in a multiphase flow comprising a gas phase and a liquid phase, the method including the steps of: swirling the multiphase flow through a conduit that comprises a constriction having a reduced conduit cross-section, wherein the swirling of the multiphase flow separates the multiphase flow in the conduit into a central gas core and a liquid outer layer; measuring a differential gas core static pressure between a position upstream of the constriction and a position in the constriction, wherein the gas core static pressure is measured in the central gas core at the upstream position and the constriction position; measuring a further quantity which provides the flow rate of the gas, the flow rate of the liquid, or a correlation between the flow rate of the gas and the flow rate of the liquid; and determining the flow rates of the gas and the liquid from the differential gas core static pressure and said measured further quantity.