Corrosion resistant system for performance drilling fluids utilizing formate brine
US6695897B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2002 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Dec 26, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/939
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A corrosion inhibited formulation for drilling compositions consisting essentially of an environmentally friendly corrosion inhibitor blended with an alkali metal formate. The corrosion inhibitor is prepared pursuant to a process including the steps of:(1) preparing a reactant mixture comprising a fatty acid such as soya fatty acid or tall oil fatty acid with polyfunctional amines;(2) subjecting the reactant mixture to a temperature of between about 130 and 170 for a period sufficient to substantially complete the reaction to obtain a fatty acid amido amine product;(3) solubilizing the reactant product with an organic acid such as acetic to produce a product that is substantially completely soluble in aqueous solutions; and(4) blending the water soluble inhibitor salts into the buffered formate media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.