Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
October 20, 2009
Patent Application Number
11266787
Date Filed
November 4, 2005
Patent Primary Examiner
Patent abstract
A method of shale inhibition comprises adding a two-phase polymer system of a water soluble copolymer of vinyl pyrrolidone and dimethylaminopropyl methacrylamide and in-situ formed water-insoluble particles of said copolymer, or, alternatively, a water-soluble copolymer of methylvinyl ether and maleic anhydride, into a drilling well fluid under aqueous, high temperature, high salinity conditions.
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