Low fluid loss cement compositions, fluid loss reducing additives and methods
US5340860A · kind A · utility
40Cited by
9References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1992 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Oct 30, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/46
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Improved liquid fluid loss reducing additives, well cement compositions containing the additives and methods of using the compositions are provided by this invention. The liquid fluid loss reducing additives are basically comprised of water, polyethylene imine, an alkali metal salt of alkylbenzene sulfonic acid and an alkali metal salt of naphthalene sulfonic acid condensed with formaldehyde.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.