Thermally stable thiosulfate hydroxyethylcellulose suspension

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 8/04 (2006.01) C08J 3/03 (2006.01) C08K 3/30 (2006.01) C09K 8/10 (2006.01) C09K 7/02 (1990.01)

Patent

CA 2119097

A storage and thermally stable polymer suspension in fresh water remains pourable after mixing at 6 months comprises at least 30% ammonium or sodium thiosulfate and 20% hydroxyethylcellulose. In an oil drilling fluid, yield value decreases less than 35% when heated for 16 hours at 250°F.

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