Abstract: Improved anti-corrosion coating systems for use in treating downhole metal surfaces in oil and gas wells are provided which include an epoxy resin together with a curing agent such as ethoxylated tallow diamine. The resin and curing agent are dispersed in an aromatic hydrocarbon dispersant, and are injected together or separately into a production well in order to form a corrosion-resistant film on downhole metal surfaces. The coating systems are resistant to freezing and provide relatively long term corrosion protection.

Abstract: Improved anti-corrosion coating systems for use in treating downhole metal surfaces in oil and gas wells are provided which include an epoxy resin together with a curing agent such as ethoxylated tallow diamine. The resin and curing agent are dispersed in an aromatic hydrocarbon dispersant, and are injected together or separately into a production well in order to form a corrosion-resistant film on downhole metal surfaces. The coating systems are resistant to freezing and provide relatively long term corrosion protection.

Abstract: Improved corrosion inhibitors for use with road deicing compositions are provided which lessen the typical corrosive properties on metal and/or concrete resulting from application of road deicers. The inhibitors of the invention include respective quantities of a citrate component such as citric acid, as well as a second silicate or metasilicate component, e.g., sodium metasilicate. The inhibitor compositions preferably include from about 0.5%-50% by weight of the citrate component and from about 50%-99.5% by weight of the second component. The inhibitors are generally used at a level of at least about 1.5% by weight to create inhibited road deicing mixtures.

Abstract: Improved compositions for the treatment and regeneration of ion exchange resin beds typically used in water softening systems are provided, which possess enhanced iron sequestering capabilities. The compositions include citric acid and a salt of citric acid, together with an iron sequestration-enhancing amount of an agent including a quantity of a source of gluconic acid or salt of gluconic acid. Preferred agents include gluconic acid, the alkali metal gluconates, glucono lactone and mixtures thereof. The compositions are advantageously formulated as dry products, which can be mixed with a preponderant amount of sodium chloride to yield regenerating media.

Abstract: Improved mud additive compositions are provided which are especially formulated to control hole enlargement due to salt bed erosion during drilling, and to assist in solubilization of deposited salt during well operations. The compositions include a first ingredient such as sodium or potassium ferrocyanide and mixtures thereof, and a second ingredient such as the trisodium salt of nitrilotriacetic acid and alkali metal citrates. The first ingredient is generally present at a level of from about 50-95% by weight in the particulate, dilutable form of the invention, whereas the second ingredient is present at a level of from about 5-50% by weight. The compositions hereof may be added to drilling mud during drilling operations or to fresh water for removing salt depositions.

Abstract: Improved mud additive compositions are provided which are especially formulated to control hole enlargement due to salt bed erosion during drilling, and to assist in solubilization of deposited salt during well operations. The compositions include a first ingredient such as sodium or potassium ferrocyanide and mixtures thereof, and a second ingredient such as the trisodium salt of nitrilotriacetic acid and alkali metal citrates. The first ingredient is generally present at a level of from about 50-95% by weight in the particulate, dilutable form of the invention, whereas the second ingredient is present at a level of from about 5-50% by weight. The compositions hereof may be added to drilling mud during drilling operations or to fresh water for removing salt depositions.

Abstract: Improved odor-reducing compositions, and corresponding methods, are disclosed wherein a substrate or area exhibiting undesirable odors is treated with an odor-reducing composition including respective quantities of citric acid and a salt of citric acid. Preferably, the odor-reducing composition in particulate form includes from about 0.1-20% by weight citric acid, at least about 50% by weight of a salt of citric acid (e.g. sodium citrate) and an anti-caking agent. The compositions of the invention may be used to good effect in the treatment of substrates such as human skin, cloth or other absorbents; or in deodorizing areas exhibiting offensive odors.