Shale inhibition
AssigneeISP Investments Inc.
InventorsSarah Orton, Andrew Mint, Robert Gibbison
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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.
Claims2
A method of shale inhibition comprising adding a composition comprising a two-phase polymer system of a water-soluble copolymer of vinyl pyrrolidone and dimethylamino propyl methacrylamide and in-situ formed water-insoluble particles of said copolymer, into a drilling well fluid under aqueous, saline conditions.
Dependencies are inferred from the claim text.