Crude dehydration
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Electrostatic coalescers
An electrostatic coalescer is a pressure vessel that uses a high-voltage electric field to merge small water droplets in crude oil into drops large enough to settle by gravity. The same equipment…
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Crude oil dehydrators
A crude oil dehydrator is an electrostatic coalescer used to remove produced water from crude so that it meets its basic sediment and water (BS&W) specification. It is the same equipment as…
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Troubleshooting and performance diagnostics
Troubleshooting a desalter, dehydrator or hydrogen pressure swing adsorption (PSA) unit starts with the symptom, because each symptom has a short list of probable causes and a short list of data that…
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Basic sediment and water (BS&W)
Basic sediment and water (BS&W) is the combined volume of water and solid sediment in a crude oil sample, reported as a volume percentage. It is the usual measure of how well…
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Crude oil treatment
A crude oil treatment system removes water, salt and sediment so that crude meets its sales or refinery specification. It works as a train: separation, heating, then dehydration and desalting in electrostatic…