Fluid loss additive for low-portland or non-portland cements
AssigneeHalliburton Energy Services, Inc.
InventorsWilliam Cecil Pearl, JR., Samuel Lewis
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Abstract
A cement composition can include water; cement, wherein less than 75 w/w % of the total amount of the cement is Portland cement; and a fluid loss additive, wherein the fluid loss additive comprises a polymer network having at least one branching point formed with a monomer and a cross-linking agent that comprises at least three active functional groups. The cement can also be a non-Portland cement. The monomer can be a vinyl ester-based monomer that is polymerized with the cross-linking agent to form the polymer network. The cement composition can be used in an oil and gas operation.
Claims20
A cement composition comprising:
- water;
- cement, wherein less than 75 w/w % of the total amount of the cement is Portland cement;
- and
- a fluid loss additive, wherein the fluid loss additive consists essentially of a polymer network having at least one branching point formed with a vinyl ester-based monomer and a cross-linking agent that comprises at least three active functional groups.
Dependencies are inferred from the claim text.