Patent ID: 9057012
Filing Date: 2015-06-16
Classification: C08F,C09K

Abstract:
1. A method comprising contacting a hydrocarbon-bearing formation with a composition comprising solvent and a fluoropolyether compound, wherein the fluoropolyether compound: is represented by formula Rf′—{C(O)—N(R  or comprises at least one first divalent unit represented by  and at least one of wherein each Rf is independently a fluoropolyether group; Rf′ is a monovalent or divalent fluoropolyether group; each Z group is independently —P(O)(OY) each Q is independently a bond, —C(O)—N(R R and R each X is independently alkylene, arylalkylene, or alkylarylene, wherein alkylene, arylalkylene, and alkylarylene are each optionally interrupted by at least one ether linkage; each X″ is independently a divalent or trivalent group selected from the group consisting of alkylene, arylalkylene, and alkylarylene, wherein alkylene, arylalkylene, and alkylarylene are each optionally interrupted by at least one ether linkage; each V′ is independently alkylene that is optionally interrupted by at least one ether linkage or amine linkage; each Y is independently selected from the group consisting of hydrogen, alkyl, trialkylsilyl, a counter cation, or a bond to the formation; n′ is in a range from 4 to 50; x is 1 or 2; and y and z are each independently 1 or 2.