Hydrotesting and Mothballing Composition and Method of using Combination Products for Multifunctional Water Treatment

Abstract

This invention relates to a composition, comprising a) at least one quaternary ammonium compound of the formula (I) wherein R is a C 5 to C 21 aliphatic hydrocarbon group, X is an anionic counter ion, and R a , R b are selected from the group consisting of hydrogen, methyl, ethyl, allyl, propyl, butyl, phenyl or benzyl residues, b) ammonium bisulfite or sodium bisulfite, c) glutaraldehyde or THPS, and d) at least one organic dye.

1 . A composition, comprising
 a) at least one quaternary ammonium compound of the formula (I)   
       
         
           
           
               
               
           
         
         
           wherein 
           R is a C 5  to C 21  aliphatic hydrocarbon group, 
           X is an anionic counter ion, and 
           R a , R b  are selected from the group consisting of hydrogen, methyl, ethyl, allyl, propyl, butyl, phenyl or benzyl residues, 
         
         b) ammonium bisulfite or sodium bisulfite, 
         c) glutaraldehyde or THPS, and 
         d) at least one organic dye. 
       
     
     
         2 . The composition according to  claim 1 , wherein R is a C 8  to C 14  aliphatic hydrocarbon group. 
     
     
         3 . The composition according to  claim 1 , wherein R is a linear or branched alkyl or alkenyl residue. 
     
     
         4 . The composition according to  claim 1 , wherein X is selected from the group consisting of acetate, polycarboxylates, chloride, bromide, iodide, bicarbonate, carbonate, sulfate and methylsulfate. 
     
     
         5 . The composition according to  claim 1 , wherein R a  and/or R b  are independently selected from the group consisting of hydrogen, methyl, ethyl, allyl, propyl, butyl, phenyl or benzyl residues. 
     
     
         6 . The composition according to  claim 1 , wherein the composition additionally comprises alkyl quaternary compounds corresponding to the formula (II) 
       
         
           
           
               
               
           
         
         wherein 
         R is a C 5  to C 21  aliphatic hydrocarbon group, 
         X is an anionic counterion and 
         R a , R b  and R c  are independently a C 5  to C 21  aliphatic hydrocarbon group. 
       
     
     
         7 . The composition according to  claim 1 , wherein component b) additionally comprises an additional oxygen scavenger selected from the group consisting of sodium sulfite, hydrazine, diethylhydroxylamine (DEHA), carbohydrazide, erythorbic acid, methylethylketoxime (MEKO), and hydroquinone. 
     
     
         8 . The composition according to  claim 1 , wherein the composition additionally comprises at least one other biocide selected from the group consisting of Tetrahydro-3,5-dimethyl-2H-1,3,5-thiadiazine-2-thione (Dazomet); N,N′-Methylene bis(5-methyl oxazolidine) (MBMO); 1,3-Bis(hydroxymethyl)-5,5-dimethylimidazoline-2,4-dione (DMDM hydantoin). 
     
     
         9 . The composition according to  claim 1 , wherein component d) is selected from the group consisting of fluorescein, disodium salt (9-o-Carboxyphenyl-6-hydroxy-3-isoxanthone, disodium salt); C.I. 45350 disodium salt; C.I. 766; C.I. Acid Yellow 73; D&C Yellow No. 8; Disodium 6-hydroxy-3-oxo-9-xanthene-o-benzoate; fluorescein sodium; xanthene dye as shown in Formula (IV); 9-(2-carboxyphenol)-3,6-bis(diethylamino)-xanthium chloride (Rhodamin B); C.I. 45170; Basic Violet 10 as shown in Formula (V) 
       
         
           
           
               
               
           
         
       
     
     
         10 . The composition according to  claim 1 , wherein the composition additionally comprises a co-solvent selected from primary, secondary and tertiary monohydric alcohols with between 1 and 20 carbon atoms, and diols with between 2 and 20 carbon atoms. 
     
     
         11 . The composition according to  claim 1 , wherein the composition additionally comprises a mutual solvent selected from the group consisting of 2-ethyl-hexanol, ethylene glycol ether of 2 ethyl-hexanol, polyethylene glycol ethers of 2 ethyl-hexanol and propylene glycol. 
     
     
         12 . The composition according to  claim 1 , wherein composition additionally comprises water. 
     
     
         13 . The composition according to  claim 1 , wherein 10 to 70 wt.-% of component a) are present. 
     
     
         14 . The composition according to  claim 1 , wherein 1 to 50 wt.-% of component b) are present. 
     
     
         15 . The composition according to  claim 1 , wherein 1 to 20 wt.-% of component c) are present. 
     
     
         16 . The composition according to  claim 1 , wherein 1 to 20 wt.-% of component d) are present. 
     
     
         17 . The composition according to  claim 10 , wherein 1 to 30 wt.-% of co-solvent are present. 
     
     
         18 . The composition according to  claim 11 , wherein 1-30 wt.-% of the mutual solvent are present. 
     
     
         19 . The composition according to  claim 12 , wherein water is present ad 100 wt.-%. 
     
     
         20 . The composition according to  claim 1 , wherein 1 to 25 wt.-% of other compounds selected from the group consisting of polyglycolethers and inorganic salts are present. 
     
     
         21 . A process for pressure testing oilfield equipment using an aqueous pressure medium, the process comprising adding to the aqueous pressure medium a composition, comprising
 a) at least one quaternary ammonium compound of the formula (I)   
       
         
           
           
               
               
           
         
         
           wherein 
           R is a C 5  to C 21  aliphatic hydrocarbon group, 
           X is an anionic counter ion, and 
           R a , R b  are selected from the group consisting of hydrogen, methyl, ethyl, allyl, propyl, butyl, phenyl or benzyl residues, 
         
         b) ammonium bisulfite, sodium bisulfite, or both 
         c) glutaraldehyde, THPS, or both, and 
         d) at least one organic dye. 
       
     
     
         22 . (canceled) 
     
     
         23 . The process according to  claim 21 , wherein the composition is present in an amount of 100 to 2,000 mg/L of the aqueous pressure medium.