Cement compositions with improved corrosion resistance and methods of cementing in subterranean formations
US7147055B2 · kind B2 · utility
32Cited by
64References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2004 |
| Grant date | Dec 12, 2006 |
| Priority date | — |
| Expiry date | Sep 23, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to subterranean well cementing operations, and more particularly, to cement compositions having improved corrosion resistance and methods of using such compositions in subterranean formations. The cement compositions generally include an unhydrated cement that includes a high alumina cement, a silica source, and a soluble phosphate; and a set retarder that includes a water soluble carboxylic acid. Optionally, other additives may be included, such as accelerants, dispersants, weighting agents, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.