Controlling iron in aqueous well fracturing fluids
US5674817A · kind A · utility
16Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1992 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Nov 19, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/933
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods and compositions for controlling iron in aqueous well fracturing fluids are disclosed. In accordance with the methods, ferric iron contained in a fracturing fluid is prevented from precipitating or otherwise disadvantageously reacting by adding a thioalkyl acid or derivative thereof to the fracturing fluid. The thioalkyl acid or derivative reduces ferric ion to ferrous ion which remains in solution at pH levels below about 7.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.