Aqueous drilling fluid and mobility control solution for use on recovery
US4468334A · kind A · utility
44Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1982 |
| Grant date | Aug 28, 1984 |
| Priority date | — |
| Expiry date | Aug 23, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/936
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An heteropolysaccharide known as Biopolymer PS 87 comprises glucose, galactose, mannose, glucuronic acid and fucose. Biopolymer PS 87 is pseudoplastic, has a consistency at 20.degree. C. of at least 150 poise and a yield stress value at 20.degree. C. of at least 30 dynes/cm.sup.2. Biopolymer PS 87 is synthesized by a strain of Bacillus polymyxa or a genetically similar micro-organism and has many domestic and industrial uses as a suspending agent or thickener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.