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Title: A Method For Remote In-Line Calibration Of Water Fraction Meters
Author: Dag Flolo
Source: 2008 North Sea Flow Measurement Workshop
Year Published: 2008
Abstract: A new method has been developed which is suitable for remote in-line calibration of water fraction meters. The method utilizes settling of water in a vertical line under no-flow conditions. As water is allowed to settle in a hydrocarbon liquid, a repeatable, low amount of water will remain solved in the hydrocarbon liquid. The amount of water can be determined, and the water in oil meter can be zero-point calibrated at this point. The method is suitable for installations where water cut meters are installed in a vertical pipe section and where no flow conditions can be provided manually or happens in occasional shut downs without depressurization. Current methods for calibration require entering a well-defined test fluid or air into the meter and/or that representative samples are taken and analyzed in a laboratory. This is especially challenging with unstable hydrocarbon liquid or low-density condensates. Current methods also require the presence of competent personnel at the site.

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