Hydrating and Dissolving Polymers in Salt Solutions
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United States of America Patent
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Issued Date -
Mar 3, 2016
app pub date -
Aug 25, 2015
filing date -
Aug 27, 2014
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Abstract
Polyacrylamides, guar gum (sometimes “guar”), xanthan gum, carboxymethylcellulose, hydroxyethylcellulose, and other water-soluble polymers are dissolved and hydrated in salt solutions, including especially recycled drilling, fracturing, and other oilfield fluids having significant salt contents, by passing the water-soluble polymer to an eductor for mixing with the salt-containing solution and then to a cavitation device including an integrated disc pump. The ability to use water-soluble polymers with the salty recycled oilfield fluids has significant environmental benefits, namely (1) fresh water is not needed, (2) disposal of the environmentally undesirable returned fluids is not needed, (3) difficultly degradable synthetic polymers may not be needed, and, in particular, (4) the enhanced ability to use guar, which, being a natural product, is biodegradable, is environmentally favored.
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