Dual function cement additive
US7674331B2 · kind B2 · utility
5Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2004 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | May 18, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The use of silicate as a retarder enhancer at appropriate levels to enhance the retarding effect of retarders at high temperatures encountered downhole while accelerating the set of cement at lower temperatures encountered near to the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.