Compositions and methods for branched calcium lignosulfonate cement dispersants
US12291670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2023 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Feb 8, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2201/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Compositions may include a calcium lignosulfonate salt having a chemical structure (I), wherein a total number of syringyl groups is 2 to 10. The compositions may further include an alcohol, an aldehyde, and water. Cement slurries may include a lignosulfonate-based cement dispersant including a calcium lignosulfonate salt having a chemical structure (I), an alcohol, an aldehyde, and water, wherein a total number of syringyl groups in the chemical structure (I) is 2 to 10. The cement slurries may further include a cement and water. Methods may include introducing a cement slurry into a wellbore penetrating a subterranean formation, wherein the cement slurry comprises a lignosulfonate-based cement dispersant, a cement, and water, and allowing the cement slurry to set to a concrete in a downhole zone of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.