Cementing compositions and application of such compositions to cementing oil wells or the like
US6874578B1 · kind B1 · utility
87Cited by
3References
12Claims
0Family size
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Key dates
| Filing date | Feb 16, 2000 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Feb 16, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/473
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Method of well cementing with a foamed slurry having a very low water content. When based on ordinary cement, the solid fraction of the slurry includes (by volume) 20-35% Portland cement, 35-65% particles ranging from 200 μm to 600 μm, and 5% to 25% of fine particles in the range 0.5 μm to 5 μm and the water content is less than 50% by volume. When based on micro-cement, the solid fraction includes (by volume) 50-75% micro-cement, 15-40% fine particles in the range 0.5 μm to 5 μm, and 0-20% particles in the rang 3 nanometers to 60 nanometers and the water content is less than 72% by volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.