Cement composition containing chemically crosslinked polyvinyl alcohol (PVA)
US5594050A · kind A · utility
9Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1996 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Mar 27, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/46
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a new, chemically crosslinked PVA. Its application is that of a fluid loss control agent in fluids used in the oil industry, in particular cement slurries, separating fluids, or "spacers", and drilling muds. Its advantages are that it does not delay the setting of the cement, that it has high temperature properties that are relatively insensitive to external conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.