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US 11,932,806 B2Granted
Passivated cement accelerator
AssigneeHalliburton Energy Services, Inc.
InventorsThomas Jason Pisklak, Pauline Akinyi Otieno, Kyriacos Agapiou, Samuel Jason Lewis
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Abstract
Embodiments relate to cementing operations and, in certain embodiments, to passivated cement accelerators and methods of using passivated cement accelerators in subterranean formations. An embodiment may comprise a method of cementing comprising: providing a cement composition comprising cement, water, and a passivated cement accelerator; and allowing the cement composition to set.
Claims20
A method of cementing comprising:
- providing a liquid additive comprising a passivated cement accelerator, the passivated cement accelerator comprising particles of a cementitious material and, comprising a passivating layer said passivating layer comprising of a hydration reaction product formed by adding the particles to water that encapsulates the particles of the cementitious material, the passivated cement accelerator being prepared by a process comprising storing the liquid additive in a pumpable fluid state for at least one day;
- after storing the liquid additive in a pumpable fluid state for at least one day, combining the liquid additive comprising the passivated cement accelerator with at least a cement and water to prepare a cement composition, wherein the passivated cement accelerator includes the passivating layer when combined with the water, and wherein the passivating layer at least partially dissolves in an alkaline environment formed by the water and the cement;
- introducing the cement composition into a subterranean formation;
- and
- allowing the cement composition to set.
2 more elements
Dependencies are inferred from the claim text.