Resilient well cement compositions and methods
AssigneeHalliburton Energy Services, Inc.
InventorsJiten Chatterji, Roger S. Cromwell, Baireddy R. Reddy, Bobby J. King
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Abstract
The present invention provides improved compositions and methods for sealing pipe in a well bore. The compositions which harden into highly resilient solid masses having high strengths are basically comprised of a hydraulic cement, an aqueous rubber latex, an aqueous rubber latex stabilizing surfactant and silica hydrophobicized with silicon oil.
Claims16
An improved cement composition which hardens into a resilient solid mass having high strength comprising:
- a hydraulic cement;
- an aqueous rubber latex present in an amount in the range of from about 40% to about 55% by weight of hydraulic cement in said composition;
- an effective amount of an aqueous rubber latex stabilizing surfactant;
- and
- silica hydrophobicized with silicon oil present in an amount in the range of from about 0.5% to about 2% by weight of hydraulic cement in said composition.
An improved cement composition which hardens into a resilient solid mass having high strength comprising:
- a hydraulic cement;
- an aqueous styrene-butadiene latex which contains water in an amount of about 50% by weight of said latex and the weight ratio of styrene to butadiene in said latex is about 25%:75%, said latex being present in an amount in the range of from about 44% to about 53% by weight of hydraulic cement in said composition;
- an aqueous rubber latex stabilizing surfactant comprised of an ethoxylated alcohol sulfonate present in an amount in the range of from about 10% to about 15% by weight of said aqueous rubber latex in said composition;
- an epoxy resin comprised of the condensation product of epichlorohydrin and bisphenol A present in an amount in the range of from about 10% to about 12% by weight of hydraulic cement in said composition;
- an epoxy resin hardening agent comprised of diethyltoluenediamine present in an amount in the range of from about 10% to about 20% by weight of epoxy resin in said composition;
- and
- porous precipitated silica hydrophobicized with silicon oil present in an amount in the range of from about 0.5% to about 1% by weight of hydraulic cement in said composition.
An improved cement composition which hardens into a resilient solid mass having high strength comprising:
- a hydraulic cement;
- an aqueous styrene-butadiene latex which contains water in an amount of about 50% by weight of said latex and the weight ratio of styrene to butadiene in said latex is about 25%:75%, said latex being present in an amount in the range of from about 40% to about 55% by weight of hydraulic cement in said composition;
- an aqueous rubber latex stabilizing surfactant comprised of an ethoxylated alcohol sulfonate present in an amount in the range of from about 10% to about 20% by weight of said aqueous rubber latex in said composition;
- and
- silica hydrophobicized with silicon oil present in an amount in the range of from about 0.5% to about 2% by weight of hydraulic cement in said composition.
Dependencies are inferred from the claim text.