Sampler measures water in North Sea oil
A
Jiskoot product story
Edited by the Engineeringtalk editorial team
Dec 20, 2005
A JetMix system with integrated water-in-oil measurement is providing representative water content analysis for a major North Sea floating production, storage and offloading vessel.
A Jiskoot JetMix system with integrated water-in-oil measurement has been selected to provide representative water content analysis for a major North Sea floating production, storage and offloading (FPSO) vessel.
Chosen because it is the only technically viable solution, the JetMix system provides fully mixed flow to the water-in-oil monitor whilst creating a negligible pressure drop ensuring that gas does not "flash-off" from the high RVP condensate liquid.
The JetMix guarantees mixing in the 16in line according to the ISO3171 standard required for accurate water measurement.
The water-in-oil monitor is mounted as part of the mixed JetMix loop ensuring the measurement is representative of the whole pipeline contents.
The type of power mixer used is designed to maintain the fluids in a liquid state and ensure they are homogeneous for fiscal analysis or sampling.
It comprises a "quill" take-off point, bypass loop, a pump and motor unit to externally provide the mixing energy and a nozzle assembly through which the process fluid is injected back into the pipeline to provide mixing.
In operation, a small proportion of the process fluid is withdrawn from the pipeline and pumped to the nozzle assembly.
The fluid is re-injected through small orifices as high velocity directional jets, distributed at the bottom of the pipeline, where the water concentration is highest.
This is especially advantageous for low flow rates where stratification occurs and free water flows along the bottom of the pipeline.
The liquid jets disperse any transient slugs of water and reduce any large globules of water into small droplets that are then distributed across the pipe cross-section.
The suction inlet for the JetMix loop is positioned in the nominally homogeneous zone downstream of the nozzle assembly.
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