Abstract: Foam systems including a surfactant subsystem including one alpha-olefin sulfonic acid or a plurality of alkali metal alpha-olefin sulfonic acid salts and optionally, one ethoxylated alcohol sulfonate or a plurality of ethoxylated alcohol sulfonates, optionally, a pour point depressant subsystem including one glyme or a plurality of glymes and optionally, a corrosion inhibiting subsystem including one corrosion inhibitor or a plurality of corrosion inhibitors, where the system is thermally or heat stable up to 450° F., the system is environmentally benign, the system is capable of producing a foam in an aqueous medium including high amounts of crude oil, the system is efficient at low usage levels and the system is capable of reuse or at least on foam-defoam cycle. Methods for making and using including preparation of the foam systems, drilling, fracturing, completion and producing using the systems in conjunction with a gas.

Abstract: A new class of sulfur scavenging or converting compositions is disclosed comprising diamine terminated, amine-aldehyde adducts, where the adducts are substantially bimolecular amine-aldehyde adducts and the composition is substantially free of trimer and/or triazines. Methods for making and using the new class of sulfur scavenging or converting composition are also disclosed.

Abstract: A new class of sulfur scavenging or converting compositions is disclosed comprising diamine terminated, amine-aldehyde adducts, where the adducts are substantially bimolecular amine-aldehyde adducts and the composition is substantially free of trimer and/or triazines. Methods for making and using the new class of sulfur scavenging or converting composition are also disclosed.

Abstract: A natural gum is used to provide emulsification of alkenyl succinic anhydride (ASA) sizing agents for paper products. The natural gum can be nonionic, cationic, anionic, amphoteric, oxidized, derivatized or modified. The alkenyl succinic anhydride size emulsion formed with the natural gum improves stability and the film formed is evenly distributed, thereby promoting more uniform sizing of the paper product. The ratio of the ASA to natural gum in the emulsion ranges from 0.01:1 to 100:1, and preferably 0.1:1 to 20:1. The amount of ASA size is 1 lb./ton to 10 lbs./ton of finished paper product. A surfactant may be used to further improve the stability of the emulsion.