Composition cimentaire hydraulique a prise retardee pour cimentation a hautes temperature et pression
US4681634A · kind A · utility
19Cited by
5References
16Claims
0Family size
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Key dates
| Filing date | Oct 16, 1985 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Oct 16, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/46
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Hydraulic cement composition with delayed setting, intended to be employed in an environment which may be under extreme temperature, pressure and salinity conditions, the composition being characterized in that it incorporates PA1 (a) a saline or nonsaline aqueous liquid phase, PA1 (b) at least one hydraulic cement, PA1 (c) a setting-retarder adjuvant preserving and/or improving the rheological properties, a water-soluble copolymer resulting from the copolymerization of ethylenic acids, acrylamides and ethylenic esters of phosphoric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.