Deep-drilling cement and process for the preparation thereof

Details Deep-drilling cement and process for the preparation thereof Deep-drilling cement and process for the preparation thereof

E - Fixed Constructions

21

B

E21B 33/14 (2006.01) C04B 16/04 (2006.01) C04B 28/08 (2006.01) C09K 8/46 (2006.01) C09K 7/02 (1990.01)

Patent

CA 2093485

Abstract The invention relates to a deep-drilling cement of a hydraulic binder and, if appropriate, additives and auxiliaries. In order to obtain high strengths with a low density of a slurry produced therefrom, plastics powder is admixed in an amount of approximately 50 to 800 kg/m3 of slurry, the plastics powder consisting of hard and tough or brittle, alkali-resistant particles with a grain size below approximately 2 mm which are unfilled or low- filled and drastically reduce their tensile strength at least only approximately 10°C above the particular maximum static borehole temperature.

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