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US 6,656,265 B1Granted
Cementation product and use for cementing oil wells or the like
AssigneeSchlumberger Technology Corporation
InventorsAndré Garnier, Michel Michaux, Philippe Revil
Life of this patent
Estimating the term…
Abstract
The present invention provides a cementing composition for an oil well or the like with porosity of less than 50%, and with a solid phase constituted by 35% to 65% (by volume) hollow microspheres, 20% to 45% Class G Portland cement, and 5% to 25% of Class G Portland micro-cement. The invention is used to cement conductor pipes in arctic zones or in deep water holes.
Claims16
A well cementing composition, comprising a slurry of:
- i) a solid phase comprising 35% to 65% by volume hollow microspheres, 20% to 45% by volume Class G Portland cement, and 5% to 25% by volume Class G Portland micro-cement;
- and
- ii) water in an amount such that the porosity, being calculated as the ratio of the volume of liquid to the total volume of slurry, is less than 50%.
Dependencies are inferred from the claim text.