C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/467 (2006.01) C04B 14/06 (2006.01) C04B 28/02 (2006.01)
Patent
CA 2662941
The present invention relates to a method of cementing a casing of an oil or gas pipeline to a surrounding well wall, where an hydraulic cement slurry is formed and the slurry is deployed in the annulus between the pipeline casing and the surrounding well wall. The cement slurry is formed by mixing together an hydraulic cement, 12 to 24% of silica based on the weight of cement, and water; wherein the silica comprises 1/3 to 2/3 microfine silica and 2/3 to 1/3 silica flour. The invention further relates to a cement slurry for use in the method.
La présente invention concerne un procédé de cimentage d'un tubage de pipeline de pétrole ou de gaz vers une paroi entourant un puits, un laitier de ciment hydraulique étant formé et ce laitier étant déployé dans l'anneau entre le tubage du pipeline et la paroi entourant ce puits. Ce laitier de ciment est formé par le mélange d'un ciment hydraulique, de 12 à 24 % de silice par rapport au poids du ciment, et d'eau, le silice comprenant un tiers à deux tiers de silice microfine et de deux tiers à un tiers de farine de silice. Cette invention concerne aussi un outil de ciment destiné à ce procédé.
Revil Philippe
Rostol Frank Vidar
Elkem As
Valadares Law Professional Corporation
LandOfFree
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