Wellbore treatment fluid

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 8/035 (2006.01) C09K 8/528 (2006.01) C09K 8/584 (2006.01) C09K 8/68 (2006.01) E21B 43/16 (2006.01)

Patent

CA 2677855

A water-based wellbore treatment fluid contains: one or more viscoelastic-gelling carboxylic acids and/or alkali metal salts thereof; and one or more solubilising alkylolamines. The carboxylic acids and/or alkali metal salts and the alkylolamines are present in the fluid in respective amounts such that, at 25°C, the alkylolamines solubilise a sufficient portion of the carboxylic acids and/or alkali metal salts to render the fluid viscoelastic. A remaining portion of the carboxylic acids and/or alkali metal salts forms a suspension of solid particulates in the fluid.

L'invention porte sur un fluide de traitement de puits de forage à base d'eau. Ledit traitement contient : un ou plusieurs acides carboxyliques et/ou sels de métaux alcalins de ceux-ci, à gélification visco-élastique; et une ou plusieurs alkylolamines solubilisantes. Les acides carboxyliques et/ou leurs sels de métaux alcalins et les alkylolamines sont présents dans le fluide dans des quantités respectives telles qu'à 25°C, les alkylolamines solubilisent une partie suffisante des acides carboxyliques et/ou de leurs sels de métaux alcalins pour rendre le fluide visco-élastique. Une partie restante des acides carboxyliques et/ou de leurs sels de métaux alcalins forme une suspension de particules solides dans le fluide.

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