Process for the preparation of fluid loss additive and gel breaker
US4986355A · kind A · utility
218Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1989 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | May 18, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/935
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A melted polymer of hydroxyacetic acid with itself or with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties is subjected to high shear and injected into an organic liquid which is inert to the polymer to form an organic liquid dispersion of very fine polymer particles. In one aspect the melted polymer is combined with the organic liquid and the combination is thereafter subjected to high shear to form the fine particle polymer dispersion. A dispersion agent may also be used to aid in dispersing the particles. The dispersion is used for fluid loss control and gel breaking in subterranean formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.