Process of well cementing in cold environment
US6955220B2 · kind B2 · utility
5Cited by
8References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Dec 21, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S166/901
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides improved well cementing methods for use in cold environment, where the circulating temperature of the cement is typically within the range of 5 to 20° C. The improved well cementing methods include forming compositions that are essentially comprised of an aqueous fluid, a hydraulic cement binder and a set-accelerating admixture comprising an alkali or alkaline earth metal nitrate and an alkali or alkaline earth metal nitrite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.