Patent ID: 7863225

Claim:
A composition comprising: a well treatment fluid; and a defoaming composition comprising an amide of carboxylic acid, a polypropylene glycol, an ethoxylated and propoxylated fatty alcohol, an ethoxylated alcohol comprising from 3 carbons to carbons that is ethoxylated with from about 3 moles to about 6 moles of ethylene oxide per mole of the alcohol, and a hydrophobic silica in an amount of up to about 3% by weight of the defoaming composition, wherein the fatty alcohol is ethoxylated with from about 4 moles to about 6 moles of ethylene oxide per mole of the fatty alcohol, wherein the fatty alcohol is propoxylated with from about 4 moles to about 6 moles of propylene oxide per mole of the fatty alcohol, and wherein the ethoxylated and propoxylated fatty alcohol is present in the defoaming composition in the range of from about 30% to about 37% by weight of the defoaming composition, wherein the defoaming composition is present in the composition in an amount of about 0.01% to about 2% by weight of the well treatment fluid.