C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 28/02 (2006.01) C04B 7/02 (2006.01) C04B 22/14 (2006.01) C04B 28/08 (2006.01) C04B 38/08 (2006.01) C09K 8/46 (2006.01) E21B 33/13 (2006.01)
Patent
CA 2380095
The invention relates to a cement slurry for cementing an oil well or the like, the slurry having a density lying in the range 0.9 g/cm3 to 1.3 g/cm3, and being constituted by a solid fraction and a liquid fraction, having porosity (ratio of liquid fraction volume over total volume) lying in the range 38% to 50%. The solid fraction is constituted by a mixture of lightweight particles, microcement and optionally Portland cement and gypsum. Such cements have remarkable mechanical properties due to their very low porosity in spite of having very low density.
L'invention concerne une boue de cimentation d'un puits de pétrole ou analogue, la boue possédant une densité comprise entre 0,9 g/cm<3> et 1,3 g/cm<3> et se composant d'une fraction solide et d'une fraction liquide dont la porosité (rapport entre le volume de la fraction liquide et de la fraction solide) est comprise entre 38 et 50 %. La fraction solide se constitue d'un mélange de particules légères, de microciment et éventuellement de ciment portland et de gypse. Ces ciments possèdent des propriétés mécaniques remarquables en raison de leur très faible porosité malgré leur très faible densité.
Drochon Bruno
Garnier Andre
Schlumberger Canada Limited
Smart & Biggar
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