Set on demand cement

Abstract

A cement slurry including: an accelerator composite having a shell encapsulating an incompressible core including an accelerator and a disintegrating agent, the disintegrating agent including a phase change material having a phase transition temperature of about 125 degrees F. (52 degrees C.) to about 1,000 degrees F. (538 degrees C.); and a volumetric expansion of at least 3% during a phase transition relative to a volume of the phase change material before the phase transition, the volumetric expansion being in excess of a tensile load containable by the shell; a cementitious material; and an aqueous carrier; where the accelerator includes at least one of an alkali metal salt, or an alkali earth metal salt.

Dependencies are inferred from the claim text.