Retarded acid soluble well cement compositions and methods
US5220960A · kind A · utility
74Cited by
16References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1992 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Jul 31, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00146
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Retarded acid soluble well cement compositions which set into hard substantially impermeable masses and methods of using such compositions for forming removable cement plugs or seals in subterranean zones are provided. The compositions are comprised of magnesium oxychloride cement and a set retarder comprised of a water soluble borate and a sugar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.