Extended settable compositions comprising cement kiln dust and associated methods
First Claim
1. An extended settable composition comprising:
- hydraulic cement in an amount of about 25% to about 75% by weight, wherein the hydraulic cement comprises a cement selected from the group consisting of Portland cement, pozzolana cement, gypsum cement, high alumina content cement, slag cement, silica cement, and any combination thereof,cement kiln dust in an amount of about 25% to about 75% by weight,a set retarding additive in an amount of about 0.1% to about 5% by weight, andwater, wherein the extended settable composition is capable of remaining in a pumpable fluid state for at least about 1 day.
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Abstract
An embodiment of the present invention includes a method of cementing in a subterranean formation comprising: providing an extended settable composition comprising hydraulic cement, cement kiln dust, water, and a set retarding additive, wherein the extended settable composition is capable of remaining in a pumpable fluid state for at least about 1 day; adding a cement set accelerator to the extended settable composition; introducing the extended settable composition into a well bore; and allowing the extended settable composition to set. Another embodiment of the present invention includes a method of cementing in a subterranean formation comprising: providing an extended settable composition comprising hydraulic cement, cement kiln dust, water, and a set retarding additive; storing the extended settable composition; adding a cement set accelerator to the extended settable composition; introducing the extended settable composition into a well bore; and allowing the extended settable composition to set.
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Citations
20 Claims
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1. An extended settable composition comprising:
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hydraulic cement in an amount of about 25% to about 75% by weight, wherein the hydraulic cement comprises a cement selected from the group consisting of Portland cement, pozzolana cement, gypsum cement, high alumina content cement, slag cement, silica cement, and any combination thereof, cement kiln dust in an amount of about 25% to about 75% by weight, a set retarding additive in an amount of about 0.1% to about 5% by weight, and water, wherein the extended settable composition is capable of remaining in a pumpable fluid state for at least about 1 day. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 18, 19, 20)
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10. An extended settable composition comprising:
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hydraulic cement in an amount of about 25% to about 75% by weight, wherein the hydraulic cement comprises a cement selected from the around consisting of Portland cement, pozzolana cement, gypsum cement, high alumina content cement, slag cement, silica cement, and any combination thereof, cement kiln dust in an amount of about 25% to about 75% by weight, a set retarding additive in an amount of about 0.1% to about 5% by weight, wherein the set retarding additive comprises tartaric acid, and water, wherein the extended settable composition is capable of remaining in a pumpable fluid state for at least about 5 days. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification