High temperature flexible cementing compositions and methods for using same
US6729405B2 · kind B2 · utility
136Cited by
51References
19Claims
0Family size
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Key dates
| Filing date | Feb 6, 2002 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Apr 1, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2201/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Natural fiber-containing cement compositions for cementing wellbores in high stress and high temperature environments. The cement compositions may contain natural mineral fiber materials such as wollastonite in an amount of greater than about 10% and in an amount selected to be effective to achieve ratios of flexural strength to compressive strength of cured cement that are greater than about 0.35 at downhole temperatures of greater than about 180° F.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.