Placement process for oil field chemicals
US4986353A · kind A · utility
187Cited by
16References
7Claims
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 primaryY10S507/922
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Oil field chemicals are incorporated in polymeric particles 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 particles are introduced into an oil well bore and/or subterranean oil formation where the polymeric particles dissolve over a period of time and release the oil field chemicals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.