Cementing compositions and applications of such compositions for cementing oil wells or the like
US6742592B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2002 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Aug 12, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/46
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides cementing compositions for an oil well or the like, comprising an hydraulic binder, dense particles with a density higher than the density of the hydraulic binder, and reinforcing particles with a density of less than 1.5 g/cm3, preferably less than 1.2 g/cm3, constituted by a flexible material or rubber, of low compressibility and with an average grain size of less than 600 &mgr;m. The compositions of the invention are of particular advantage when preventing zones which are subjected to extreme stresses, such as perforation zones and the junctions of a multi-branch lateral well. They are also highly suitable for producing plugs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.