Cement compositions useful in oil and gas wells
US7156173B2 · kind B2 · utility
29Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 7, 2003 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Jan 7, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/763
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Cement compositions containing low reactivity materials are disclosed. The compositions are useful in conditions involving high temperatures, high pressures, and tectonic forces such as oil and gas wells. The cement compositions display increased compressive strength, flexural strength, and tensile strength. Fractures appear to occur in a non-linear fashion between the Interfacial Transition Zone (ITZ) of the particles, rather than in a straight line such as those observed in conventional cement materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.