Scale deposition inhibitor
US5171459A · kind A · utility
14Cited by
18References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1992 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Mar 11, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/927
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A aqueous oil well scale inhibiting composition is disclosed as well as a dispersion and scale inhibiting method. The inhibitor comprises a phosphate ester or phosphonate calcium carbonate inhibitor and a sulfonated alkyldiphenylether zinc and/or lead sulfide dispersant. The dispersion includes at least 1 ppm of effectively dispersed zinc and/or lead sulfide particulates up to a concentration of about 200 ppm or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.