Abstract: Compositions and methods for preventing the formation of aggregates and for dispersing aggregates and other poorly soluble materials in hydrocarbon fluids. The compositions include an asphaltene dispersant prepared from the reaction of a polyethyleneimine (PEI) dendrimer and one or more derivatizing reagents wherein the polyethyleneimine dendrimer has a weight average molecular weight of greater than or equal to 9 kDa. The methods include emplacing in a wellbore a composition comprising an asphaltene inhibitor, wherein the asphaltene inhibitor is a compound prepared from the reaction of a polyethyleneimine dendrimer and one or more derivatizing reagents wherein the polyethyleneimine dendrimer has a weight average molecular weight of greater than or equal to 9 kDa.

Abstract: The present disclosure relates to compositions and methods for prevent the formation of and disperse aggregates and other poorly soluble materials in hydrocarbon fluids. The compositions include an asphaltene dispersant prepared from the reaction of a polyethyleneimine (PEI) dendrimer and one or more derivatizing reagents wherein the polyethylene dendrimer has a weight average molecular weight of greater than or equal to 9 kDa. The methods include emplacing in a wellbore a composition comprising an asphaltene inhibitor, wherein the asphaltene inhibitor is a compound prepared from the reaction of a polyethyleneimine dendrimer and one or more derivatizing reagents wherein the polyethylene dendrimer has a weight average molecular weight of greater than or equal to 9 kDa.

Abstract: Quaternary ammonium compounds and compositions comprising the compounds are disclosed. The compositions are valuable as gas hydrate inhibitors in the oil and gas exploration, recovery and processing industries. The compounds and compositions may have improved biodegradability and reduced toxicity when compared with benchmark materials. Quaternary ammonium compounds of the present disclosure have the formula (I) in which R is C1-4 alkyl, C6-10 aryl, or C1-4alkyl-C6-10aryl; R1 is hydrogen or a group of formula —C(?O)X; and R2 is hydrogen or a group of formula —C(?O)Y, provided that R1 and R2 are not both hydrogen; X and Y are each independently a hydrogen, C1-6 alkyl or C1-6 alkenyl group, and Z is a C4-24 alkyl or C4-24 alkenyl group; each D is independently C1-4 alkylene; and A? is an anion.

Abstract: A composition may include a branched polymer to encapsulate a guest molecule to be released under oilfield conditions. The guest molecule may include a production chemical, such as a scale or corrosion inhibitor. The branched polymer may be substituted with fatty acids. The branched polymer may also function as both an ecapsulator as well as a production chemical in certain applications.

Abstract: Quaternary ammonium compounds and compositions comprising the compounds are disclosed. The compositions are valuable as gas hydrate inhibitors in the oil and gas exploration, recovery and processing industries. The compounds and compositions may have improved biodegradability and reduced toxicity when compared with benchmark materials. Quaternary ammonium compounds of the present disclosure have the formula (I) in which R is C1-4 alkyl, C6-10 aryl, or C1-4alkyl-C6-10aryl; R1 is hydrogen or a group of formula —C(=0)X; and R2 is hydrogen or a group of formula —C(=0)Y, provided that R1 and R2 are not both hydrogen; X and Y are each independently a hydrogen, C1-6 alkyl or C1-6 alkenyl group, and Z is a C4-24 alkyl or C4-24 alkenyl group; each D is independently C1-4 alkylene; and A? is an anion.