Cementation product and use for cementing oil wells or the like

Details Cementation product and use for cementing oil wells or the like Cementation product and use for cementing oil wells or the like

C - Chemistry, Metallurgy

04

B

C04B 28/04 (2006.01) C04B 38/00 (2006.01) C09K 8/46 (2006.01) E21B 33/13 (2006.01)

Patent

CA 2350545

The invention concerns a cementation composition for oil wells or the like whereof the porosity is less than 50 and whereof the solid phase consists for 35 to 65% (by volume) of hollow microspheres, for 20 to 45% of Class G Portland cement and for 5 to 25 % of Class G Portland micro-cement. The invention is particularly useful for cementing conduit tubes in arctic regions or drill holes in deep water.

La présente invention a pour objet une composition de cimentation pour puits pétroliers ou analogues dont la porosité est inférieure à 50 et dont la phase solide est constituée pour 35 à 65% (en volume) de microsphères creuses, pour 20 à 45% de ciment Portland Classe G et pour 5 à 25% de micro-ciment de type Portland Classe G. L'invention est utilisée notamment pour la cimentation de tubes conducteurs en zones arctiques ou dans des forages en eau profonde.

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