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US 12,065,609 B2Granted
Emulsion polymerized cement suspension agent
AssigneeHalliburton Energy Services, Inc.
InventorsWilliam Cecil Pearl, Jr., Samuel J. Lewis
Life of this patent
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Abstract
A cement composition comprising a hydraulic cement, water and a suspension agent comprising a polymer formed via emulsion polymerization, wherein the polymer has a weight average molecular weight of at least 600,000. The cement composition may be introduced into a wellbore to cement a casing in place within the wellbore. The cement composition is able to maintain consistency and thickness even at high temperatures above 350° F.
Claims10
A method comprising:
- dissolving one or more monomers comprising acrylamide in an aqueous fluid,
- emulsifying the aqueous fluid containing the one or more monomers comprising acrylamide in an oleaginous fluid to form an invert emulsion,
- adding an initiator to the invert emulsion forming a suspension agent comprising a polymer;
- adding the suspension agent into a cement composition, wherein the polymer comprises a molecular weight of at least 600,000;
- and
- introducing the cement composition into a portion of a wellbore having a temperature of at least 300° F. and the suspension agent maintains a thickness and consistency of the cement composition and prevents settling of the cement composition,
- wherein the cement composition does not include a cross-linking agent for the suspension agent,
- wherein the suspension agent is added into the cement composition as a liquid.
5 more elements
A cement composition comprising:
- a hydraulic cement;
- water;
- and
- a suspension agent comprising a polymer formed via invert emulsion polymerization, wherein the polymer comprises a molecular weight of at least 600,000, one or more monomers comprising acrylamide, and the suspension agent maintains a thickness and consistency of the cement composition and prevents settling of the cement composition at a temperature of at least 300° F.,
- wherein the cement composition does not include a cross-linking agent for the suspension agent,
- wherein the suspension agent is added into the cement composition as a liquid.
3 more elements
Dependencies are inferred from the claim text.