Electromagnetic multiphase flowmeter
AssigneeWionetic AS
InventorØivind Godager
Life of this patent
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Abstract
An electromagnetic flowmeter and a method for measuring a property of a fluid composition are provided. The electromagnetic flowmeter includes a first electric conductor with first and second ends, arranged inside a fluid conduit carrying a fluid composition comprising hydrocarbons, an RF electric signal source, and a first dual signal detector including first and second input ports. The first terminal of the electric signal source is connected to the first end of the first electric conductor and arranged to induce an RF electromagnetic wave in the fluid conduit by supplying an input electric signal to the first end of the first electric conductor. The first and second ports of the signal detector are connected to the first and second ends of the first electric conductor, respectively.
Claims13
An in-line electromagnetic flowmeter, comprising:
- a transmission line comprising a first electric conductor with first and second ends, configured to be arranged inside a fluid conduit carrying a fluid composition comprising hydrocarbons;
- a Radio Frequency electric signal source;
- and
- a first dual Radio Frequency signal detector comprising first and second input ports,
- wherein a first terminal of the electric signal source is connected to the first end of the first electric conductor and is configured to induce a Radio Frequency electromagnetic wave in the fluid conduit by supplying an input electric signal to the first end of the first electric conductor,
- wherein the first and second ports of the signal detector are connected to the first and second ends of the first electric conductor, respectively,
- wherein the electromagnetic flowmeter comprises a signal processor configured to receive signal parameter values representative of the transmission and/or reflection characteristics of the first electric conductor, and configured to determine a property of the fluid composition, and
- wherein the first electric conductor is a metal wire configured to be arranged as a spiral inside the fluid conduit, and the electromagnetic flowmeter further comprises an insulating liner embedding the spiral metal wire.
A method for measuring a property of a fluid composition carried in a fluid conduit comprising the steps of:
- inducing a Radio Frequency electromagnetic wave in the fluid conduit by supplying an input Radio Frequency electric signal to a first end of a first electric conductor inside the fluid conduit, where the electric conductor is part of a transmission line;
- receiving an output Radio Frequency electric signal from a second end of the first electric conductor;
- and
- determining a property of the fluid composition based on the input Radio Frequency electric signal, the reflected signal on the first end, and the output Radio Frequency electric signal,
- wherein the first electric conductor is a metal wire configured to be arranged as a spiral inside the fluid conduit, and the spiral metal wire is embedded in an insulating liner.
Dependencies are inferred from the claim text.