Wax Inhibitor Compositions in Winterized Conditions for Petroleum Fluids

Abstract

A method of treating petroleum fluids includes adding a wax inhibitor composition to the petroleum fluids, the wax inhibitor composition, including a wax inhibitor; a non-ionic surfactant or a cationic surfactant; and a co-solvent blend. A method of treating a petroleum fluid, includes adding a wax inhibitor composition to the petroleum fluid, the wax inhibitor composition including a wax inhibitor; an anionic surfactant selected from at least one of an isopropylamine dodecylsulfonic acid salt or an isopropylamine linear dodecylbenzene sulfonate; and a co-solvent blend.

What is claimed: 
     
         1 . A method of treating petroleum fluids, comprising:
 adding a wax inhibitor composition to the petroleum fluids, the wax inhibitor composition, comprising:
 a wax inhibitor; 
 a non-ionic surfactant or a cationic surfactant; and 
 a co-solvent blend. 
   
     
     
         2 . The method of  claim 1 , wherein the wax inhibitor is an alpha olefin maleic anhydride copolymer. 
     
     
         3 . The method of  claim 1 , wherein the copolymer is converted to an ester or imide. 
     
     
         4 . The method of  claim 1 , wherein the wax inhibitor is about 0.5% to 15% by weight of the composition. 
     
     
         5 . The method of  claim 1 , wherein the surfactant is a non-ionic surfactant. 
     
     
         6 . The method of  claim 5 , wherein the non-ionic surfactant is an alcohol ethoxylate. 
     
     
         7 . The method of  claim 5 , wherein the non-ionic surfactant is about 0.5% to 25% by weight of the composition. 
     
     
         8 . The method of  claim 1 , wherein the surfactant is a cationic surfactant. 
     
     
         9 . The method of  claim 8 , wherein the cationic surfactant is an ethoxylated aliphatic amine. 
     
     
         10 . The method of  claim 8 , wherein the cationic surfactant is about 2.5% to 45% by weight of the composition. 
     
     
         11 . The method of  claim 1 , wherein the co-solvent blend includes saturated cyclic hydrocarbons and aromatic hydrocarbons. 
     
     
         12 . The method of  claim 11 , wherein the saturated cyclic hydrocarbons are about 1.5% to 50% by weight of the composition and the aromatic hydrocarbons are about 20 to 90% by weight of the composition. 
     
     
         13 . The method of  claim 1 , wherein the wax inhibitor composition is added to the petroleum fluids at a concentration of 50 to 5000 ppm. 
     
     
         14 . A method of treating a petroleum fluid, comprising:
 adding a wax inhibitor composition to the petroleum fluid, the wax inhibitor composition, comprising:
 a wax inhibitor; 
 an anionic surfactant selected from at least one of an isopropylamine dodecylsulfonic acid salt or an isopropylamine linear dodecylbenzene sulfonate; and 
 a co-solvent blend. 
   
     
     
         15 . The method of  claim 14 , wherein the wax inhibitor is an alpha olefin maleic anhydride copolymer. 
     
     
         16 . The method of  claim 15 , wherein the copolymer is converted to an ester or imide. 
     
     
         17 . The method of  claim 14 , wherein the wax inhibitor is about 0.5% to 15% by weight of the composition. 
     
     
         18 . The method of  claim 14 , wherein the anionic surfactant is about 5% to 50% by weight of the composition. 
     
     
         19 . The method of  claim 14 , wherein the co-solvent blend includes saturated cyclic hydrocarbons and aromatic hydrocarbons. 
     
     
         20 . The method of  claim 19 , wherein the saturated cyclic hydrocarbons are about 1.5% to 50% by weight of the composition and the aromatic hydrocarbons are about 20 to 90% by weight of the composition. 
     
     
         21 . The method of  claim 14 , wherein the wax inhibitor composition is added to the petroleum fluid at a concentration of 50 to 5000 ppm.