Substituted Carboxamide Corrosion Inhibitor Compounds

Abstract

A method of inhibiting corrosion of a metal surface may include contacting the metal surface with a corrosion inhibitor compound that includes a substituted carboxamide.

What is claimed is: 
     
         1 . A method of inhibiting corrosion of a metal surface, comprising:
 contacting the metal surface with a corrosion inhibitor compound comprising a substituted carboxamide.   
     
     
         2 . The method of  claim 1 , further comprising coating the metal surface with the corrosion inhibitor compound. 
     
     
         3 . The method of  claim 1  further comprising introducing the corrosion inhibitor compound into a wellbore, wherein the metal surface is disposed in the wellbore. 
     
     
         4 . The method of  claim 1 , wherein the substituted carboxamide comprises the molecular formula:
   R 1 C(O)NR 2 R 3      wherein R 1  is selected from the group consisting of a hydrogen, an alkyl group, an alkenyl group, a heteroatom substituted alkyl group, or a heteroatom atom substituted alkenyl group;   wherein R 2  is a hydrogen, an alky group, an alkenyl group, a heteroatom substituted alkyl group, a heteroatom atom substituted alkenyl group, or an alkyl or alkenyl group terminated by a five-membered heterocyclic ring with at least one pendent group comprising a ketone group, a thione group, or any combination thereof; and   wherein R 3  is an alkyl or alkenyl group terminated by a five-membered heterocyclic ring with at least one pendent group comprising a ketone group, a thione group, or any combination thereof.   
     
     
         5 . The method of  claim 1 , wherein the substituted carboxamide comprises the molecular formula: 
       
         
           
           
               
               
           
         
         wherein X 1  is selected from the group consisting of a thione or a ketone, and 
         wherein R 1  is selected from the group consisting of a hydrogen, an alky group, an alkenyl group, a heteroatom substituted alkyl group, or a heteroatom atom substituted alkenyl group. 
       
     
     
         6 . The method of  claim 1 , wherein the substituted carboxamide comprises the molecular formula: 
       
         
           
           
               
               
           
         
         wherein X 1  is individually selected from the group consisting of a thione or a ketone; and 
         wherein R 1  is selected from the group consisting of a hydrogen, an alky group, an alkenyl group, a heteroatom substituted alkyl group, or a heteroatom atom substituted alkenyl group. 
       
     
     
         7 . The method of  claim 1 , wherein the substituted carboxamide comprises the molecular formula: 
       
         
           
           
               
               
           
         
         wherein X 1  is individually selected from the group consisting of a thione or a ketone, and 
         wherein R 1  is selected from the group consisting of an alky group, an alkenyl group, a heteroatom substituted alkyl group, or a heteroatom atom substituted alkenyl group. 
       
     
     
         8 . The method of  claim 1 , wherein the substituted carboxamide is present in the fluid in an amount of from about 10 ppm to about 500 ppm. 
     
     
         9 . The method of  claim 1 , wherein the corrosion inhibitor compound is provided in a solvent selected from the group consisting of methyl alcohol, ethyl alcohol, isopropyl alcohol, methanol, glycol, ethylene glycol, propylene glycol, dimethyl formamide, N-methyl pyrrolidone, propylene glycol methyl ether, toluene, xylene, monobutyl ether, hexane, cyclohexane, 2-Butoxyethanol, any organic solvent, aromatic solvents and any combination thereof. 
     
     
         10 . The method of  claim 3 , wherein the introducing the corrosion inhibitor compound into the wellbore comprises pumping the corrosion inhibitor compound from a fluid supply, through a production tubing, and into the wellbore, and mixing the corrosion inhibitor compound with a produced fluid. 
     
     
         11 . The method of  claim 10 , further comprising transporting the corrosion inhibitor compound mixed with the produced fluid to a surface of the wellbore, and coating at least one metal surface in which the corrosion inhibitor compound mixed with the produced fluid contacts. 
     
     
         12 . The method of  claim 4 , wherein R 2  is a heteroatom substituted five-membered heterocyclic ring with at least one pendent group comprising a ketone group or a thione group. 
     
     
         13 . The method of  claim 12 , wherein the heteroatom substituted five-membered heterocyclic ring comprises nitrogen. 
     
     
         14 . The method of  claim 5 , wherein the substituted carboxamide is alkylated. 
     
     
         15 . The method of  claim 6 , wherein the substituted carboxamide is alkylated. 
     
     
         16 . The method of  claim 9  wherein the solvent is present in an amount of about 50 wt % to about 99.5 wt % based on the total weight of the solvent and the corrosion inhibitor. 
     
     
         17 . A corrosion inhibitor comprising:
 a solvent package; and   a corrosion inhibitor compound comprising a substituted carboxamide having the formula:
   R 1 C(O)NR 2 R 3    
   wherein R 1  is selected from the group consisting of a hydrogen, an alky group, an alkenyl group, a heteroatom substituted alkyl group, or a heteroatom atom substituted alkenyl group,   wherein R 2  is a hydrogen, an alky group, an alkenyl group, a heteroatom substituted alkyl group, a heteroatom atom substituted alkenyl group, or an alkyl or alkenyl group terminated by a five-membered heterocyclic ring with at least one pendent group comprising a ketone group, a thione group, or any combination thereof, and   wherein R 3  is an alkyl or alkenyl group terminated by a five-membered heterocyclic ring with at least one pendent group comprising a ketone group, a thione group, or any combination thereof.   
     
     
         18 . The method of  claim 17  wherein the solvent package comprises solvent selected from the group consisting of methyl alcohol, ethyl alcohol, isopropyl alcohol, ethylene glycol, propylene glycol, dimethyl formamide, N-methyl pyrrolidone, propylene glycol methyl ether, butyl cellulose, aromatic solvents, and combinations thereof. 
     
     
         19 . A system for introducing a corrosion inhibitor into a wellbore, comprising:
 a fluid supply containing the corrosion inhibitor, wherein the corrosion inhibitor comprises a corrosion inhibitor compound and a solvent package, wherein the corrosion inhibitor compound comprises a substituted carboxamide; and   a tubular in a wellbore in a subterranean formation, wherein the tubular is in fluid communication with the corrosion inhibitor supply.   
     
     
         20 . A system according to  claim 19 , wherein the substituted carboxamide has the formula:
   R 1 C(O)NR 2 R 3      wherein R 1  is selected from the group consisting of a hydrogen, an alky group, an alkenyl group, a heteroatom substituted alkyl group, or a heteroatom atom substituted alkenyl group,   wherein R 2  is a hydrogen, an alky group, an alkenyl group, a heteroatom substituted alkyl group, a heteroatom atom substituted alkenyl group, or an alkyl or alkenyl group terminated by a five-membered heterocyclic ring with at least one pendent group comprising a ketone group, a thione group, or any combination thereof, and   wherein R 3  is an alkyl or alkenyl group terminated by a five-membered heterocyclic ring with at least one pendent group comprising a ketone group, a thione group, or any combination thereof.