Method of measuring a multiphase flow
US8536883B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2010 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Jun 8, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/2605
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring the permittivity and/or conductivity of a multiphase fluid flowing through a conduit is provided. The method includes the steps of measuring the signal from a first electromagnetic transmitter to a first electromagnetic receiver separated by a first distance, measuring the signal from the first electromagnetic transmitter to a second electromagnetic receiver separated by a second distance, measuring the signal from a second electromagnetic transmitter to the first electromagnetic receiver separated by a distance substantially equal to the second distance, measuring the signal from the second electromagnetic transmitter to the second electromagnetic receiver separated by a distance substantially equal to the first distance, and wherein the first and second distances are substantially different. This is followed by the step of combining the four signals to obtain a measurement of the phase-shift and amplitude-attenuation substantially independent of the gain values applied to the receivers and transmitters to provide an estimate of the mixture permittivity and/or conductivity of the multiphase fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.