Expanding additive for cement composition

Details Expanding additive for cement composition Expanding additive for cement composition

E - Fixed Constructions

21

B

E21B 33/13 (2006.01) C04B 2/10 (2006.01) C04B 14/30 (2006.01) C04B 20/00 (2006.01) C04B 22/00 (2006.01) C09K 8/46 (2006.01)

Patent

CA 2224201

Deadburned magnesium oxides (calcined at a temperature of above about 4000°F) can be advantageously utilized as an expanding additive in cements utilized to seal a metallic casing into the bore hole of a well. The deadburned magnesium oxide additives are particularly effective when used in cements having a curing temperature of about 120-200°C and particularly at temperatures greater than about 150°C.

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