Delayed thixotropic cement compositions and methods

E - Fixed Constructions – 21 – B

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E21B 33/14 (2006.01) C04B 22/10 (2006.01) C09K 8/46 (2006.01)

Patent

CA 2352685

Delayed thixotropic cement compositions and methods of cementing in subterranean zones penetrated by well bores are provided. The novel cement compositions are basically comprised of a hydraulic cement, sufficient water to form a slurry and a water soluble delayed thixotropy imparting additive selected from the group consisting of carbonic acid and alkali metal carbonates.

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