Control of the properties of cement slurries with optimized polymers combination
US7857053B2 · kind B2 · utility
2Cited by
2References
13Claims
0Family size
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Key dates
| Filing date | Dec 17, 2008 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Feb 7, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00146
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cement slurry composition for cementing a well comprising: a hydraulic cement, water and a combination made of a hydroxyethyl cellulose and an acrylamido-methyl-propane sulfonate-acrylamide copolymer. Provided is also a method for cementing a well involving such cement slurry composition. The composition provides a solution to decouple the fluid-loss control and the slurry rheologyfor cement for slurry and particularly for extended cement slurry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.