Method of increasing the LSRV of aqueous fluids and oil-in-water emulsions prepared thereby
Patent 5977030 Issued on November 2, 1999. Estimated Expiration Date: 
January 11, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 11, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1824221 2224135 2713029 3065170 Additive for reducing gel strength in aqueous drilling fluids Heteropolysaccharide biopolymer Microbial heteropolysaccharide Drilling fluid with browning reaction anionic carbohydrate Well drilling and servicing fluids and methods of increasing the low shear rate viscosity thereof Patent #: 5804535 InventorAssigneeApplicationNo. 228515 filed on 01/11/1999US Classes:507/110, Organic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, xanthan, etc.) or carboxylic acid ester of an alcohol which has five or more hydroxy groups bonded directly to carbons507/140, Contains inorganic component other than water or clay507/209, Organic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, etc.) or carboxylic acid ester of an alcohol which has five or more hydroxy groups bonded directly to carbons507/211, Carbohydrate is polysaccharide507/213, Polysaccharide is a xanthan (e.g., scleroglucans, etc.)507/269, Contains inorganic component other than water or clay516/53Aqueous continuous liquid phase and discontinuous phase primarily organic liquid (e.g., organosilicon* oil- or mineral-oil*-in-water, o/w emulsion)ExaminersPrimary: Tucker, PhilipAttorney, Agent or FirmInternational ClassesC09K 007/02C09K 003/00 AbstractDisclosed are oil-in-water emulsions containing an aqueous polysaccharide-containing continuous phase, an emulsified oleaginous liquid, and an oligosaccharide mixture composed of sugar units selected from the group consisting of arabinose, mannose, galactose, glucose, xylose, and mixtures thereof, and which consists primarily of pentosans and hexosans containing from one to ten sugar units. The emulsions preferably also contain an alkaline earth metal oxide or hydroxide, preferably lime. The emulsions may also contain aphrons. Also disclosed is a method of increasing the low shear rate viscosity of aqueous polysaccharide-containing fluids which comprise incorporating into the fluids an oligosaccharide mixture, an oleaginous liquid, and optionally, an alkaline earth metal oxide or hydroxide.Field of SearchOrganic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, xanthan, etc.) or carboxylic acid ester of an alcohol which has five or more hydroxy groups bonded directly to carbonsContains inorganic component other than water or clay Organic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, etc.) or carboxylic acid ester of an alcohol which has five or more hydroxy groups bonded directly to carbons Carbohydrate is polysaccharide Polysaccharide is a xanthan (e.g., scleroglucans, etc.) Contains inorganic component other than water or clay Aqueous continuous liquid phase and discontinuous phase primarily organic liquid (e.g., organosilicon* oil- or mineral-oil*-in-water, o/w emulsion) |
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