Corrosion inhibitors for aqueous brines
US4980074A · kind A · utility
11Cited by
15References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1988 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Dec 9, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/939
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A high density brine useful as a drilling fluid for deep wells is rendered corrosion resistant by the incorporation of a soluble aliphatic or aromatic aldehyde with or without olefinic unsaturation and with the use of alkali metal thiocyanates or ammonium thiocyanates. The aldehyde can be reacted with a primary amine prior to use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.