Pumice-containing remedial compositions and systems for use
AssigneeHalliburton Energy Services, Inc.
InventorsJiten Chatterji, D. Chad Brenneis, James R. Benkley
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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.
Claims18
A remedial cementing system for cementing in a subterranean formation 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;
- wherein the lightweight settable composition is essentially free of any additional cementitious components;
- and wherein the lightweight settable composition is foamed with a foaming additive and a gas;
- mixing equipment for mixing the lightweight settable composition;
- and
- pumping equipment for delivering the lightweight settable composition into a void or crack in the subterranean formation, a gravel pack, a conduit, a cement sheath, or a microannulus.
A remedial cementing system for cementing in a subterranean formation comprising:
- 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 essentially free of any additional cementitious components;
- and wherein the lightweight settable composition is foamed with a foaming additive and a gas;
- mixing equipment for mixing the lightweight settable composition;
- and
- pumping equipment for delivering the lightweight settable composition into a void or crack in the subterranean formation, a gavel pack, a conduit, a cement sheath, or a microannulus.
A remedial cementing system for cementing in a subterranean formation comprising:
- a lightweight settable composition comprising pumice, a calcium activator in an amount of about 0.1% to about 25% by weight of the pumice, shale in an amount of about 40% to about 100% by weight of the pumice, zeolite in an amount of about 40% to about 100% 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 essentially free of any additional cementitious components, 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 into a void or crack in the subterranean formation, a gravel pack, a conduit, a cement sheath, or a microannulus.
Dependencies are inferred from the claim text.