Patent ID: 6338276
Filing Date: 2002-01-15
Classification: G01F,G01N

Abstract:
A method for determining a flow rate value of at least one phase forming a part of a flowing multiphase medium having at least one liquid phase and at least one gas phase, including:a) feeding the multiphase medium into a chamber having at least one delivery line, a slotted tube having ports through which the multiphase medium flows from the chamber into the tube and out of the slotted tube from at least one discharge line; b) determining at least two pressure values P1 and P2 at two different points A and B inside the slotted tube with each of two spaced apart pressure sensors which are directly coupled to at least one of the at least one gas and the at least one liquid phase of the flowing multiphase medium, at least one pressure value Po of the chamber and a level of the interface between the liquid phase and the gas phase in the chamber; and c) determining, from the pressure values and the interface level determined at step b), from knowledge of a density &rgr;g of the gas phase and a density &rgr;1 of the liquid phase, from passage coefficients of the ports, at least one of a value of a group comprising a total flow rate Qt, a flow rate q1 of the liquid phase or a flow rate qg of the gas phase.