Clay stabilizing agent preparation and use
US4693639A · kind A · utility
49Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1986 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Jun 25, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/933
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods of preparing and using a clay stabilizing agent are provided. The agent is prepared by polymerizing diallyldimethylammonium chloride with sulfur dioxide in the presence of a polymerization reaction rate retarder to form a solid cationic copolymer having a high sulfur content. When dissolved in an aqueous carrier fluid, the copolymer is particularly effective in preventing clay swelling and/or fines migration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.