Accelerators for composite cement compositions
AssigneeHalliburton Energy Services, Inc.
InventorsThomas Jason Pisklak, Sean William Riggio, Ronnie Glen Morgan, Thomas Singh Sodhi, Simone E A Lumsden, Samuel J. Lewis
Life of this patent
Estimating the term…
Abstract
Disclosed herein are methods, compositions, and systems for cementing. A method of cementing may comprise: providing a composite cement composition comprising a pozzolan, an accelerator, and water, wherein the accelerator comprises a chloride salt and a sulfate salt, wherein the composite cement composition is free of Portland cement or comprises Portland cement in an amount of about 50% by weight of cementitious components or less; and allowing the composite cement composition to set.
Claims16
A method of cementing comprising:
- providing a composite cement composition comprising:
- a pozzolan,
- an accelerator, and
- water,
- wherein the accelerator comprises sodium chloride in an amount of about 2% by weight of cementitious components and sodium sulfate in an amount of about 2% by weight of cementitious components, wherein the composite cement composition comprises Portland cement in an amount of 17% to 35% by weight of cementitious components;
- and
- allowing the composite cement composition to set,
- wherein the accelerator has a sodium chloride to sodium sulfate weight ratio of about 50:50, and wherein the accelerator is present in an amount sufficient to provide over 300% increase in compressive strength as compared to a composite cement composition with no accelerator, wherein the compressive strength is a twenty-four hour compressive strength.
A composite cement composition comprising:
- a pozzolan;
- an accelerator, wherein the accelerator comprises sodium chloride in an amount of about 2% by weight of cementitious components and sodium sulfate in an amount of about 2% by weight of cementitious components;
- and
- water,
- wherein the composite cement composition comprises Portland cement in an amount of 17% to 35% by weight of cementitious components,
- wherein the accelerator has a sodium chloride to sodium sulfate weight ratio of about 50:50, and wherein the accelerator is present in an amount sufficient to provide over 300% increase in compressive strength as compared to a composite cement composition with no accelerator, wherein the compressive strength is a twenty-four hour compressive strength.
Dependencies are inferred from the claim text.