초록 ▼

A non-hazardous, non-flammable, biodegradable composition for use in removal of paraffin accumulations in oilfield equipment may contain limonene, a glycol ether an ethoxylate(alcohol surfactant, an aliphatic alcohol having 1 to 4 carbon atoms or mixtures thereof, a non-hazardous and biodegradable o

A non-hazardous, non-flammable, biodegradable composition for use in removal of paraffin accumulations in oilfield equipment may contain limonene, a glycol ether an ethoxylate(alcohol surfactant, an aliphatic alcohol having 1 to 4 carbon atoms or mixtures thereof, a non-hazardous and biodegradable organic acid, and, sufficient water as a carrier and comprising such a major weight component of the composition as to virtually eliminate a measurable flashpoint therefor. Preferably the aliphatic alcohol is one or methanol, ethanol, or admixtures thereof. Preferably the organic acid is one of acetic acid, citric acid, or formic acid. The glycol either is preferably ethylene glycol monopropyl ether.

대표청구항 ▼

[ I claim:] [14.] A process for at least partially removing paraffinic accumulations and sludges from oilfield tanks comprising:introducing and then alternating cycles of agitation and rest within a given oilfield tank an aqueous-based non-hazardous, non-flammable, biodegradable composition consisti

[ I claim:] [14.] A process for at least partially removing paraffinic accumulations and sludges from oilfield tanks comprising:introducing and then alternating cycles of agitation and rest within a given oilfield tank an aqueous-based non-hazardous, non-flammable, biodegradable composition consisting essentially of limonene, ethylene glycol monopropyl ether, an ethoxylated lauryl alcohol or ethoxylated oleyl alcohol surfactant, an aliphatic alcohol having 1 to 4 carbon atoms or mixtures thereof, a non-hazardous and biodegradable organic acid; and, water as a carrier and comprising such a major weight component of the composition as to virtually eliminate a measurable flashpoint for the composition;wherein said organic acid comprises one of acetic acid or citric acid;wherein said aliphatic alcohol comprises of one of methanol, ethanol or a mixture thereof; and,wherein said composition essentially consists approximately of 1/3.sup.rd of a percentage point of weight percent of said limonene; 3 weight percent of said ethylene glycol monopropyl ether; 1 weight percent of said ethoxylated lauryl alcohol or ethoxylated oleyl alcohol surfactant; 1/3.sup.rd of a percentage point of weight percent of said methanol, ethanol or admixture therebetween, 1/3.sup.rd of a percentage point of weight percent of either said acetic acid or said citric acid, and, 95 weight percent of said water carrier.