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US 7,285,164 B2Granted
Fluid loss additives for cement slurries
AssigneeHalliburton Energy Services, Inc.
InventorsKaren Luke, Russell M. Fitzgerald, Robert S. Taylor, Keith A. Rispler, Glen C. Fyten
Life of this patent
Estimating the term…
Abstract
Methods for cementing in a subterranean zone, which use a cement composition that includes zeolite, cementitious material, proportioned fluid loss control additives and a mixing fluid. Cement compositions containing proportioned fluid loss control additives, and methods of making cement compositions containing proportioned fluid loss control additives.
Claims38
A cement composition comprising:
- a mixing fluid;
- a base blend comprising zeolite in an amount of at least 20 weight percent and cementitious material;
- and
- proportioned fluid loss control additives, which proportioned fluid loss additives comprise at least a first fluid loss additive having a first molecular weight and at least a second fluid loss additive having a second molecular weight, which second molecular weight is less than the first molecular weight, and which first fluid loss additive is present in an amount that is less than the amount of the second fluid loss additive.
1 more element
A cement mix comprising:
- a base blend comprising zeolite in an amount of at least 20 weight percent, and at least one cementitious material;
- and
- proportioned fluid loss additives, which proportioned fluid loss additives comprise at least a first fluid loss additive having a first molecular weight and at least a second fluid loss additive having a second molecular weight, which second molecular weight is less than the first molecular weight, and which first fluid loss additive is present in an amount that is less than the amount of the second fluid loss additive.
Dependencies are inferred from the claim text.