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AssigneeHalliburton Energy Services, Inc.
InventorsB. Raghava Reddy, Anindya Ghosh, Russell Fitzgerald
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A method of servicing a wellbore comprising introducing to the wellbore a wellbore servicing fluid comprising an additive composition comprising a polysaccharide having carboxylate and sulfonate groups. A method of servicing a wellbore comprising preparing at the well site an additive composition comprising a polysaccharide having carboxylate and sulfonate groups, introducing the additive composition into a wellbore servicing fluid, and placing the wellbore servicing fluid into a subterranean formation. A method of preparing a wellbore servicing fluid comprising contacting a polysaccharide composition with an oxidizing agent to form an oxidized polysaccharide, and contacting the oxidized polysaccharide with a sulfonating agent to form a carboxylated sulfonated polysaccharide, and contacting the carboxylated sulfonated polysaccharide with a wellbore servicing fluid.
A method of servicing a wellbore comprising introducing to the wellbore a wellbore servicing fluid comprising an additive composition, wherein the additive composition has a biodegradability of greater than 20% in 68 days, comprises (i) a carboxylated sulfonated polysaccharide and (ii) a non-oxidizing reaction byproduct, and is prepared by contacting a polysaccharide with an oxidizing agent and oxidatively cleaving at least one chemical bond of the polysaccharide selected from the group consisting of a glycosidic linkage and a hydroxylated carbon-carbon bond to form an oxidized polysaccharide and contacting the oxidized polysaccharide with a sulfonating agent to form the carboxylated sulfonated polysaccharide,
A method of servicing a wellbore comprising:
A method of servicing a wellbore comprising introducing to the wellbore a wellbore servicing fluid comprising an additive composition, wherein the additive composition comprises (i) a carboxylated sulfonated polysaccharide having a ratio of carboxylate functionalities to sulfonate functionalities of from about 0.1 to about 4 and (ii) a non-oxidizing reaction byproduct, and wherein the additive composition is prepared by:
Dependencies are inferred from the claim text.