Methods of cementing using a fluid loss control additive

Details Methods of cementing using a fluid loss control additive Methods of cementing using a fluid loss control additive

C - Chemistry, Metallurgy

04

B

C04B 28/02 (2006.01) C09K 8/42 (2006.01)

Patent

CA 2598940

A method of cementing, comprising displacing a cement composition into a workspace, wherein the cement composition comprises cement, water, and a fluid loss control additive comprising a polymer and a sugar connected by a pH- sensitive crosslink, and allowing the cement composition to set. A method for reducing fluid loss from a cement composition, comprising providing a cement and a fluid loss control additive, wherein the fluid loss control additive comprises a polymer and a sugar connected by a pH-sensitive crosslink, and mixing the cement, fluid loss control additive, and water to form the cement composition.

L~invention concerne un procédé de cimentation, comprenant le déplacement d~une composition de ciment dans une zone de travail, la composition de ciment comprenant du ciment, de l'eau, et un additif de régulation de perte de fluide comprenant un polymère et un sucre liés par une réticulation sensible au pH, et permettant à la composition de ciment de prendre. L~invention concerne un procédé réduisant la perte de fluide à partir d'une composition de ciment, comprenant l~apport d~un ciment et d~un additif de régulation de perte de fluide, l~additif de régulation de perte de fluide comprenant un polymère et un sucre liés par une réticulation sensible au pH, et le mélange du ciment, de l~additif de régulation de perte de fluide et d~eau pour former la composition de ciment.

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