Fluid loss additive for low-portland or non-portland cements

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...

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Bibliographische Detailangaben
Hauptverfasser: PEARL, William Cecil Jr, LEWIS, Samuel J
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung: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.