Cement compositions for cementing wells, allowing pressure gas-channeling in the cemented annulus to be controlled
US4537918A · kind A · utility
110Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1983 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Mar 30, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/0035
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to cement compositions for cementing wells, which allow pressure gas-channeling to be effectively controlled up to more than about 485.degree. F. The cement composition contains a styrene-butadiene latex and a stabilizer. The film of latex interrupts gas-channeling after an extremely brief path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.