Composition and placement process for oil field chemicals
US4986354A · kind A · utility
202Cited by
7References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 14, 1988 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Sep 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2989
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Oil field chemicals are incorporated in microcapsules of the condensation product of hydroxyacetic acid or the co-condensation product of hydroxyacetic acid and other compounds containing hydroxy-, carboxylic acid-, or hydroxycarboxylic acid moieties. The microcapsules are then introduced into an oil well bore and/or subterranean oil formation where the microcapsules dissolve over a period of time and release the oil field chemicals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.