Method of using construction grade cement in oil and gas wells

Details Method of using construction grade cement in oil and gas wells Method of using construction grade cement in oil and gas wells

C - Chemistry, Metallurgy

04

B

C04B 18/14 (2006.01) C04B 28/08 (2006.01) C09K 8/46 (2006.01) E21B 33/13 (2006.01)

Patent

CA 2183414

A method of cementing an oil and gas wellbore is accomplished by mixing togetherblast furnace slag, construction grade cement and water to form a pumpable slurry. The slurry is then pumped to a selected location within an oil and gas well and allowed to solidify within the wellbore. The blast furnace slag alters the properties of the construction grade cement so that it can be used in the construction of oil and gas wells, where it would otherwise not be feasible to use. The blast furnace slag enhances the physical and chemical properties of the construction grade cement, increasing gel times and decreasing fluid loss.

Méthode de cimentation d'un puits de pétrole et de gaz en mélangeant du laitier de haut-fourneau, du ciment de construction et de l'eau pour obtenir une bouillie pompable. La bouillie est ensuite pompée dans un endroit déterminé d'un puits de pétrole et de gaz et on la laisse se solidifier. Le ciment de construction ne peut être normalement utilisé dans les puits de pétrole et de gaz. Toutefois, son utilisation est rendue possible par le laitier de haut-fourneau qui modifie ses propriétés. En effet, le laitier améliore les propriétés physiques et mécaniques du ciment de construction, améliore le temps de gélification et réduit les pertes de fluide.

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