Well cementing method using acid removable low density well cement compositions
US5213161A · kind A · utility
104Cited by
10References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 19, 1992 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Feb 19, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/473
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Low density well cement compositions which set into hard substantially impermeable masses, but which are removable by dissolution in acid, and methods of utilizing such compositions for forming removable cement plugs or seals in subterranean zones are provided. The compositions are comprised of pumpable foamed slurries of magnesium oxychloride cement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.