Cement compositions with improved mechanical properties and methods of cementing in subterranean formations
AssigneeHalliburton Energy Services, Inc.
InventorsLance E. Brothers, Krishna M. Ravi, Anthony V. Palmer
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Abstract
The present invention provides foamed cement compositions with improved mechanical properties and methods of cementing in subterranean formations, particularly in conjunction with subterranean well operations. The foamed cement compositions comprise carbon fibers, a hydraulic cement material, sufficient water to form a slurry, an expanding additive, and optionally other ingredients including a weighting agent, a retarding or accelerating agent, or the like.
Claims31
A method of cementing in a well bore comprising:
- providing a cement composition consisting essentially of a hydraulic cement, water, carbon fibers, the carbon fibers having a mean length of about 500 microns or less, a retardant, and an expanding additive selected from the group consisting of one or more gases, aluminum, gypsum, and magnesium oxide;
- placing the cement composition within the well bore;
- and
- allowing the cement composition to set therein.
A method of cementing in a well bore comprising:
- providing a cement composition capable of being foamed consisting essentially of a hydraulic cement;
- water;
- carbon fibers, the carbon fibers having a mean length of about 1 mm or less;
- a retardant and an expanding additive;
- placing the cement composition into the well bore;
- and
- allowing a gas to be produced in the cement composition before the cement composition develops compressive strength.
A method of cementing in a well bore comprising:
- providing a cement composition capable of being foamed consisting essentially of a hydraulic cement;
- water;
- an expanding additive;
- a retardant;
- and carbon fibers, the carbon fibers having a mean length of about 1 mm or less and present in amount of from about 1% by weight of the cement to about 15% by weight of the cement in the cement composition;
- placing the cement composition in a desired area within the well bore;
- and
- allowing a gas to become incorporated within the cement composition before the cement composition develops compressive strength.
Dependencies are inferred from the claim text.