Foamed cement compositions and methods
US6210476A · kind A · utility
56Cited by
7References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1999 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Sep 7, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides improved foamed well cement compositions and methods. The foamed cement compositions have improved properties and are basically comprised of hydraulic cement, amorphous silica surface treated with a mixture of organosilane coupling agents, sufficient water to form a slurry, sufficient gas to foam the slurry and a mixture of foaming and foam stabilizing surfactants present in an amount sufficient to facilitate the formation of the foam and stabilize the foamed composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.