Cementing compositions and application thereof to cementing...

Details Cementing compositions and application thereof to cementing... Cementing compositions and application thereof to cementing...

C - Chemistry, Metallurgy

04

B

C04B 28/02 (2006.01) C04B 24/26 (2006.01)

Patent

CA 2352244

The invention relates to cementing compositions which are particularly suitable for squeeze cementing operations, comprising an aqueous phase, a micro-cement, and an aqueous suspension comprising a vinyl acetate type polymer obtained by chemically cross-linking a polyvinyl compound, a nanolatex and an anionic surfactant with a cloud point of more than 80 °C.

L'invention concerne des compositions de cimentation particulièrement aptes à être utilisées dans des opérations de cimentation sous pression. Ces compositions comprennent une phase aqueuse, un ciment constitué de particules microniques, et une suspension aqueuse renfermant un polymère du type acétate de vinyle, que l'on obtient en procédant à une réticulation chimique d'un composé polyvinylique, ladite suspension contenant également un nanolatex et un tensioactif anionique présentant un point de trouble supérieur à 80 DEG C.

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