Procedure for the admixture of silcon oxide to a hydraulic...

C - Chemistry – Metallurgy – 04 – B

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C04B 18/02 (2006.01) C04B 14/06 (2006.01) C04B 18/14 (2006.01) C04B 28/02 (2006.01) C09K 8/46 (2006.01) E21B 33/14 (2006.01)

Patent

CA 2050594

The invention relates to a procedure for the admixture of silicon oxide to a hydraulic cement slurry, particularly for well cementing, and is characterized by amorphus silica with particles smaller than 1 micro-metre being mixed with water to a liquid micro-silica, silica flour with particles from 2 to 200 micro-metres being mixed in said liquid micro-silica and the thereby ob- tained silica mixture being added to cement slurry directly in a mixing tank. In addition the invention relates to a hydraulic ce- ment slurry produced according to the procedure.

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