Cement slurry and method for production of such a slurry of cement, but also the use of a filling material of light weight, as an additive into a fluid cement.

摘要

Invention patent: b "cement slurry and method for production of such a slurry of cement.And also use of a filling material of light weight, as an additive in a slurry of cement " d .A material insoluble in water, consisting of porous particles, preferably of glass,It is used as a filler of light weight additive into a slurry of cement type used in cementing operations in boreholes.Especially in oil and gas wells.With the main purpose to leave the glass particles porous to water of the mixture material in cement slurry and then this mixture.In such a way that an extra water is kept in readiness within the folder are mixed in the cement filler.The slurry of cement after hydration and deficiency of water, will be able to absorb the extra water from the pores of the porous particles, neutralizing, this way.The possibility of the cement slurry to shrink.