US 2016/0200959 A1

Wellbore cement compositions and wellbore cementing methods

(22) 21.03.2016

(43) 14.07.2016

(57) A wellbore cement composition includes substantially unhy­drated cement powder and additive powder for cement. The additive powder is formulated from ingredients including a liquid additive for cement and solid carrier particles. The liquid additive is absorbed by the solid carrier particles. A wellbore cementing method includes using a dry cement composition, adding water to the dry cement composition, forming a cement slurry, placing the slurry in a wellbore, and setting the placed slurry. The dry cement composition con­tains substantially unhydrated cement powder and retarder powder for cement. The retarder powder contains a retarder absorbed by solid carrier particles.

(71) Baker Hughes Incorporated, ­Houston, TX (US)

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