Cement slurry

Details Cement slurry Cement slurry

1988-11-03

1992-10-27

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106721, 166293, 405266, C04B 1404

Patent

active

051586134

ABSTRACT:
Hydraulic high density cement slurry, especially for cementation of oil/gas-wells. The slurry contains 30-45 weight % microsilica based on the cement weight and water to a density of 1.9-3.5 g/cm.sup.3. If desired there can be added dispersant, retarder and weighting agent. Microsilica acts as a fluid-loss preventing agent. The addition of microsilica prevents strength retrogression at temperatures above 120.degree. C. and acts as a mechanical stabilizer for the cement slurries. A method for production of the cement slurry is also described.

REFERENCES:
patent: 3145774 (1964-08-01), Patchen
patent: 4385935 (1983-05-01), Skjeldal
patent: 4935060 (1990-06-01), Dingsoyr

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