Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Patent
1998-07-24
1999-06-29
Tucker, Philip
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
507140, 507209, 507213, 507269, C09K 702
Patent
active
059168498
ABSTRACT:
Disclosed is a method of increasing the thermal stability or decreasing the fluid loss of aqueous polysaccharide-containing fluids which comprises incorporating into the fluids an oligosaccharide mixture composed of arabinose, mannose, galactose, glucose, and xylose sugar units, the oligosaccharide mixture consisting of the water soluble portion of thermally hydrolyzed lignocellulose and consisting primarily of pentosans and hexosans containing from one to four combined sugar units.
Preferred fluids contain a biopolymer which increases the low shear rate viscosity of the fluids. Fluids which contain polysaccharides which impart other desirable characteristics to the fluids, such as increased viscosity at higher shear rates, fluid loss control, and the like, also exhibit increased thermal stability upon incorporating the oligosaccharide mixture therein.
REFERENCES:
patent: 2713029 (1955-07-01), Fuller
patent: 4900457 (1990-02-01), Clarke-Sturman
patent: 5514644 (1996-05-01), Dobson
House Roy F.
Tucker Philip
Venture Innovations, Inc.
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