Heteropolysaccharide solutions stabilized against viscosity loss over temperature and time
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 6, 1990
Grant Date -
N/A
app pub date -
Dec 5, 1985
filing date -
Dec 5, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Aqueous saline solutions of ordered heteropolysaccharides useful, e.g., as displacement fluids in the secondary or tertiary recovery of crude oil from subterranean formations thereof, are stabilized against viscosity loss over temperature and time without adversely affecting the filterability thereof, by purging dissolved oxygen therefrom by degassing same with carbon dioxide, and then treating the degassed solutions with an effective amount of a reducng/deoxidizing agent as to maintain the pH thereof at a value ranging from 5 to 7.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully