Cement slurries comprising hydrophobic polymers
US6710107B2 · kind B2 · utility
35Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2001 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Feb 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/46
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a cement slurry set in a wellbore. The slurry comprises cement, at least one mineral filler, water and a determined amount of at least one hydrophobically modified acrylamide or acrylate derivative.The present invention also relates to an additive specific to a cement slurry and acting as a filtrate reducer and as a rheological control agent, the additive comprising mainly a hydrophobically modified acrylamide or acrylate derivative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.