Pumice-Containing Remedial Compositions and Methods of Use
First Claim
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1. A remedial cementing system for sealing one or more voids in a well bore comprising:
- a lightweight settable composition comprising pumice, a calcium activator, and water, wherein the water is present in an amount in a range of from about 40% to about 200% by weight of the pumice, wherein the lightweight settable composition has a density of less than about 13.5 pounds per gallon;
mixing equipment for mixing the lightweight settable composition; and
pumping equipment for delivering the lightweight settable composition to the one or more voids in the well bore.
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Abstract
Systems for remedial cementing are provided that utilize pumice and various additives. One of the systems for remedial cementing embodiments comprises a lightweight settable composition comprising pumice, a calcium activator, and water, wherein the lightweight settable composition has a density of less than about 13.5 pounds per gallon; mixing equipment for mixing the lightweight settable composition; and pumping equipment for delivering the lightweight settable composition to a well bore.
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Citations
23 Claims
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1. A remedial cementing system for sealing one or more voids in a well bore comprising:
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a lightweight settable composition comprising pumice, a calcium activator, and water, wherein the water is present in an amount in a range of from about 40% to about 200% by weight of the pumice, wherein the lightweight settable composition has a density of less than about 13.5 pounds per gallon; mixing equipment for mixing the lightweight settable composition; and pumping equipment for delivering the lightweight settable composition to the one or more voids in the well bore. - View Dependent Claims (3, 5, 6, 8, 9, 10, 11, 12, 13, 14)
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2. (canceled)
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4. (canceled)
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7. (canceled)
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15. A remedial cementing system for sealing one or more voids in a well bore comprising:
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a lightweight settable composition comprising pumice, a calcium activator in an amount of about 0.1% to about 25% by weight of the pumice, and water in an amount in a range of from about 40% to about 200% by weight of the pumice, wherein the lightweight settable composition has a density of less than about 13.5 pounds per gallon; mixing equipment for mixing the lightweight settable composition; and pumping equipment for delivering the lightweight settable composition to the one or more voids in the well bore. - View Dependent Claims (16, 17, 22, 23)
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18. A remedial cementing system for sealing one or more voids in a well bore comprising:
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a lightweight settable composition comprising pumice, a calcium activator in an amount of about 0.1% to about 25% by weight of the pumice, and water in an amount in a range of from about 40% to about 200% by weight of the pumice, wherein the lightweight settable composition has a density of less than about 13.5 pounds per gallon, wherein the lightweight settable composition is free of Portland cement, and wherein the composition is foamed using a foaming additive and a gas; mixing equipment for mixing the lightweight settable composition; and pumping equipment for delivering the lightweight settable composition to the one or more voids in the well bore. - View Dependent Claims (19, 20, 21)
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Specification