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US 9,255,031 B2Granted
Two-part set-delayed cement compositions
AssigneeHalliburton Energy Services, Inc.
InventorsThomas Jason Pisklak, Kyriacos Agapiou, Peter James Boul, Pauline Akinyi Otieno, Lance Everett Brothers
Life of this patent
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Abstract
A variety of methods and compositions are disclosed, including, in one embodiment a method of cementing comprising: providing a pozzolan slurry comprising a pozzolan and water; providing a lime slurry comprising hydrated lime and water; allowing the pozzolan slurry and the lime slurry to remain separate for about one day or longer; mixing the pozzolan slurry and the lime slurry to form a cement composition; and allowing the cement composition to set.
Claims23
A method of cementing in a subterranean formation comprising:
- providing a pozzolan slurry comprising a pozzolan and water;
- wherein the water is present in the pozzolan slurry in an amount of about 33% to about 200% by weight of the pozzolan;
- providing a lime slurry comprising hydrated lime and water;
- wherein the lime is present in the lime slurry in an amount of about 10% to about 100% by weight of the amount of pozzolan present in the pozzolan slurry;
- wherein the water is present in the lime slurry in an amount of about 33% to about 200% by weight of the lime;
- allowing the pozzolan slurry and the lime slurry to remain separate for about one day or longer;
- mixing the pozzolan slurry and the lime slurry to form a cement composition on a surface not within a subterranean formation or mixing the pozzolan slurry and the lime slurry to form a cement composition within a subterranean formation;
- placing the cement composition into a subterranean formation;
- and
- allowing the cement composition to set in the subterranean formation in which the cement composition was placed.
7 more elements
A method of displacing a fluid in a subterranean formation comprising:
- providing a pozzolan slurry comprising a pozzolan and water;
- wherein the water is present in the pozzolan slurry in an amount of about 33% to about 200% by weight of the pozzolan;
- providing a lime slurry comprising hydrated lime and water;
- wherein the lime is present in the lime slurry in an amount of about 10% to about 100% by weight of the amount of pozzolan present in the pozzolan slurry;
- wherein the water is present in the lime slurry in an amount of about 33% to about 200% by weight of the lime;
- introducing a first portion of the pozzolan slurry into a wellbore that penetrates a subterranean formation such that the first portion of the pozzolan slurry displaces at least one fluid from the wellbore;
- mixing a second portion of the pozzolan slurry and at least a portion of the lime slurry to form a cement composition, wherein the second portion of the pozzolan slurry and the portion of the lime slurry are mixed on a surface not within the subterranean formation or mixing the second portion of the pozzolan slurry and the portion of the lime slurry to form a cement composition within a subterranean formation;
- placing the cement composition into a subterranean formation;
- and
- allowing the cement composition to set in the subterranean formation in which the cement composition was placed.
7 more elements
A system for cementing in a subterranean formation comprising:
- a pozzolan slurry comprising a pozzolan and water:
- wherein the water is present in the pozzolan slurry in an amount of about 33% to about 200% by weight of the pozzolan;
- a lime slurry for combination with the pozzolan slurry to form a cement composition, wherein the lime slurry comprises hydrated lime and water;
- wherein the lime is present in the lime slurry in an amount of about 10% to about 100% by weight of the amount of pozzolan present in the pozzolan slurry;
- wherein the water is present in the lime slurry in an amount of about 33% to about 200% by weight of the lime;
- and
- mixing equipment capable of mixing the pozzolan slurry and the lime slurry.
4 more elements
A method of cementing in a subterranean formation comprising:
- providing a pozzolan slurry comprising a pozzolan and water;
- providing a lime slurry comprising hydrated lime and water;
- allowing the pozzolan slurry and the lime slurry to remain separate for about one day or longer;
- mixing the pozzolan slurry and the lime slurry to form a cement composition on a surface not within a subterranean formation or mixing the pozzolan slurry and the lime slurry to form a cement composition within a subterranean formation;
- wherein the cement composition comprises a cement set retarder comprising a phosphonic acid derivative, and wherein the cement composition further comprises a dispersant comprising a polycarboxylated ether dispersant;
- placing the cement composition into a subterranean formation;
- and
- allowing the cement composition to set in the subterranean formation in which the cement composition was placed.
5 more elements
Dependencies are inferred from the claim text.