Copolymer for shale stabilization and method of use
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United States of America Patent
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Nov 18, 2014
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Jun 23, 2009
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Jun 23, 2008
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Abstract
Embodiments disclosed herein relate to methods for stabilizing shales while drilling a wellbore into an earthen formation comprising circulating an aqueous based wellbore fluid in the wellbore while drilling through shales; wherein the aqueous-based wellbore fluid comprises a copolymer of acrylamide-type comonomers and at least one cationic comonomer.
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