Lightweight well cement compositions and methods
US6776237B2 · kind B2 · utility
119Cited by
33References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2003 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Feb 21, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Lightweight cement compositions and methods of cementing a subterranean zone penetrated by a well bore utilizing the compositions are provided. A lightweight cement composition of the invention is basically comprised of a coarse particulate hydraulic cement, an ultrafine particulate hydraulic cement mixture comprised of slag cement and a Portland or equivalent cement, fly ash, fumed silica, hollow glass spheres and water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.