Composition useful in sulfate scale removal
US11945997B2 · kind B2 · utility
0Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2020 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Jun 12, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B37/06
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention discloses a novel aqueous composition for use in removing petroleum-contaminated barium sulfate scale from a surface contaminated with such, said composition comprising: a chelating agent and a counterion component selected from the group consisting of: Li5DTPA; Na5DTPA; K5DTPA; Cs5DTPA; Na4EDTA; K4EDTA; TEAH4DTPA; and TBAH5DTPA; a scale removal enhancer; and a non-ionic surfactant. There is also disclosed methods to use such compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.