Derivatization of polymers and well treatments using same

Details Derivatization of polymers and well treatments using same Derivatization of polymers and well treatments using same

C - Chemistry, Metallurgy

09

K

C09K 3/00 (2006.01) C08B 31/02 (2006.01) C08B 37/00 (2006.01) C09K 8/08 (2006.01) C09K 8/32 (2006.01) C09K 8/52 (2006.01) C09K 8/64 (2006.01) C09K 8/68 (2006.01) C09K 8/72 (2006.01) E21B 43/16 (2006.01) E21B 43/17 (2006.01)

Patent

CA 2290361

Polymers are derivatized and then may be introduced into a wellbore, such as in a hydraulic fracturing treatment. A polymer may be a guar powder that is mixed with an organic solvent and derivatized using a derivatizing agent, such as sodium chloroacetate. The polymer is typically derivatized in bulk prior to introduction into the wellbore. The derivatized polymer may be hydrated and/or cross-linked prior to introduction into the wellbore.

Selon cette invention, on dérivatise des polymères pour les introduire ensuite dans un puits de forage, par exemple, lors d'un traitement par fracturation hydraulique. Un polymère peut se présenter comme une poudre de guar, mélangée à un solvant organique et dérivatisée au moyen d'un agent de dérivatisation tel que le chloroacétate de sodium. Le polymère est normalement dérivatisé en vrac, avant son introduction dans le puits de forage. Le polymère dérivatisé peut être hydraté et/ou réticulé avant d'être introduit dans le puits de forage.

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