Cementing compositions and foaming of such compositions for...

Details Cementing compositions and foaming of such compositions for... Cementing compositions and foaming of such compositions for...

E - Fixed Constructions

21

B

E21B 33/14 (2006.01) C04B 28/02 (2006.01) C04B 38/10 (2006.01) C09K 8/473 (2006.01)

Patent

CA 2364250

The invention provides a method of cementing an oil well or the like comprising injecting a cement slurry comprising a surfactant, and foaming said slurry before allowing the cement to set. The water content of the slurry used is very low (less than 50 % by volume for systems based on an ordinary cement and less than 72 % by volume for systems based on a micro-cement).

La présente invention concerne un procédé de cimentation d'un puit de pétrole ou assimilé par injection d'un laitier de ciment comprenant un surfactant que l'on aura fait mousser préalablement pour favoriser la prise du ciment. La teneur en eau de la suspension utilisée est extrêmement faible (moins de 50 % par volume pour des formules à base de ciment ordinaire et moins de 72 % par volume pour des formules à base de micro-ciment).

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