Cement compositions and methods
US11898088B2 · kind B2 · utility
1Cited by
31References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2020 |
| Grant date | Feb 13, 2024 |
| Priority date | — |
| Expiry date | Nov 14, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Cement slurries are prepared that comprise water, a hydraulic cement, particles of an oil-absorbent particles and non-swellable hydrophobic particles. The particles are present in an amount sufficient to alter a property of a non-aqueous drilling fluid. The cement slurry is placed in a subterranean well, whereupon the slurry contacts residual drilling fluid on casing and formation surfaces. The oil-absorbent particles and hydrophobic particles in the cement slurry may reduce the mobility of the drilling fluid, thereby improving zonal isolation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.