ACTIVATION OF SET-DELAYED CEMENT COMPOSITIONS BY RETARDER EXCHANGE

摘要

A variety of methods and compositions are disclosed, including, in one embodiment a method comprises providing a set-delayed cement composition comprising: a hydraulic cement, water, and a primary retarder; activating the set-delayed cement composition through a retarder exchange whereby a secondary retarder is added to the set-delayed cement composition to produce an activated cement composition; and allowing the activated cement composition to set.