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US Patent 9932521 Calcium ion tolerant self-suspending proppants

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US Patent 11993750 Coated nanosand as relative permeability modifier
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Patent abstract

A self-suspending proppant comprises a proppant particle substrate carrying a coating of an anionic hydrogel-forming polymer. The detrimental effect of calcium and other divalent ions on the ability of the proppant to swell when contacted with water is reduced by including a calcium binding agent in the proppant.

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US Patent 11802232 Polymer-nanofiller hydrogels
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US Patent 11713415 Salt-tolerant self-suspending proppants made without extrusion
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US Patent 09932521 Calcium ion tolerant self-suspending proppants US Patent 9932521 Calcium ion tolerant self-suspending proppants

Infobox
Patent Number
0993252100
Patent Number
993252100
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Infobox
Is a
Patent
Patent
0
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
0
Patent Number
099325210
Date of Patent
April 3, 2018
0
Patent Application Number
146319460
Date Filed
February 26, 2015
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Patent Primary Examiner
‌
Jeffrey Washville
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edited on 28 Sep, 2022
Infobox
Is a
Patent
Patent
0
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
0
Patent Number
099325210
Date of Patent
April 3, 2018
0
Patent Application Number
146319460
Date Filed
February 26, 2015
0
Patent Primary Examiner
‌
Jeffrey Washville
0
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 US Patent 09932521 Calcium ion tolerant self-suspending proppants

Infobox
Is a
Patent
Patent
Patent jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent number
09932521
Date of patent
April 3, 2018
Patent application number
14631946
Date Filed
February 26, 2015
Patent primary examiner
‌
Jeffrey Washville

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