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US 7,297,208 B2Granted
Cement compositions comprising strength-enhancing lost circulation materials and methods of cementing in subterranean formations
AssigneeHalliburton Energy Services, Inc.
InventorsWilliam J. Caveny, Rickey L. Morgan
Life of this patent
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Abstract
Cement compositions comprising a strength-enhancing lost circulation material, and methods for cementing using such cement compositions. Exemplary embodiments of the cement compositions comprise cement, water, and a strength-enhancing lost circulation material. Optionally, other additives suitable for inclusion in cement compositions may be added.
Claims17
A cement composition comprising:
- a cement selected from the group consisting of Portland cements, pozzolana cements, gypsum cements, soil cements, calcium phosphate cements, high alumina content cements, silica cements, and high alkalinity cements;
- a strength-enhancing lost circulation material of sufficient size to reduce loss of circulation of the cement composition into a subterranean formation, wherein the lost circulation material comprises vitrified shale;
- and
- water.
1 more element
A cement composition comprising:
- a cement selected from the group consisting of Portland cements, pozzolana cements, gypsum cements, soil cements, calcium phosphate cements, high alumina content cements, silica cements, and high alkalinity cements;
- vitrified shale, wherein the vitrified shale has a particle size distribution in the range of from about 37 micrometers to about 4,750 micrometers;
- and
- water.
1 more element
Dependencies are inferred from the claim text.