Electrostatically coated composites

Abstract

Herein disclosed is a method of electrostatically coating a composite object comprising: a) Pretreating a surface of the composite object with a composition to induce conductivity; b) Applying a charge to the object after surface pretreatment; and c) Electrostatically applying a coating material to the object. In an embodiment, the method comprises cleaning the surface of the composite object prior to pretreating. Also described is a composite downhole tool pretreated with a surface pretreatment composition and electrostatically coated. In an embodiment, the composite downhole tool comprises bridge or frac plug mandrels, wedges, sleeves, noses, cones, mule shoes, extrusion limiters, slips, baffles, landing seats, frac balls, wireline tools, housings for measurement-while-drilling, housings for logging-while-drilling, or tubular parts.

What is claimed is: 
     
         1 . A method of electrostatically coating a composite object comprising:
 a) Pretreating a surface of said composite object with a composition to induce conductivity;   b) Applying a charge to said object after surface pretreatment; and   c) Electrostatically applying a coating material to said object.   
     
     
         2 . The method of  claim 1  further comprising cleaning the surface of said composite object prior to pretreating, and optionally comprising utilizing acetone or denatured alcohol to clean said surface. 
     
     
         3 . The method of  claim 1  wherein step (b) takes place immediately after step (a) or after the composition dries or at any state in between. 
     
     
         4 . The method of  claim 1  further comprising curing said object after coating, and optionally wherein said curing takes place at a temperature of from about 250° F. to about 450° F., and optionally wherein said curing takes place for less than 1 hour. 
     
     
         5 . The method of  claim 1   wherein said composition comprises at least one iodophor of a member selected from the group consisting of nonionic surfactants, glycol ether, polyvinylpyrrolidone, and combinations thereof; or   wherein said composition comprises at least one iodophor of polyethoxylated nonylphenol, at least one iodophor of polyethoxylated fatty alcohol, and combinations thereof.   
     
     
         6 . The method of  claim 1   wherein said composition comprises from about 0.001 wt-% to about 100 wt-% of at least one iodophor of a nonionic surfactant, glycol ether, polyvinylpyrrolidone, and combinations thereof; or   wherein said composition comprises from about 0.5 wt-% to about 1.5 wt-% titratable iodine.   
     
     
         7 . The method of  claim 1  wherein said composition comprises at least one member selected from the group consisting of water, alcohol, ether toluene, p-xylene, benzene, carbon disulfide, chloroform, carbon tetrachloride, glycerol, and alkaline iodide solution. 
     
     
         8 . The method of  claim 1  wherein said composition comprises at least one iodophor of a nonionic surfactant selected from the group consisting of primary and secondary aliphatic alcohol ethoxylates, alkylphenol ethoxylates and ethylene oxide/propylene oxide condensates on primary alkanols, condensates of ethylene oxide with sorbitan fatty acid esters, condensates of ethylene oxide and aliphatic ethers or glycols and combinations thereof, optionally wherein said composition comprises at least one ethylene oxide/propylene oxide condensates which comprises about 50% to about 70% ethylene oxide and at least one of nonylphenoxypoly (ethyleneoxy) ethanol or octylphenoxypoly (ethyleneoxy) ethanol. 
     
     
         9 . The method of  claim 1   wherein said composition comprises at least one of water, ethanol, methanol, isopropanol; or   wherein said composition comprises at least one halophor of a nonionic surfactant, glycol ether, polyvinylpyrrolidone, and combinations thereof.   
     
     
         10 . The method of  claim 1  wherein said composition comprises at least one member selected from the group consisting of halophors of nonionic surfactants; halophors of amphoteric surfactants; iodophors, chlorophors and bromophors of anionic surfactants; halophors of glycol ether or polyvinylpyrrolidone; hypohalites; hypohalates; perhalates; iodine, chlorine, bromine, and fluorine. 
     
     
         11 . The method of  claim 1  wherein said composition comprises a halogen complex which is an iodophor of a surfactant, optionally wherein said composition comprises an iodophor of polyethoxylated nonylphenol, an iodophor of polyethoxylated fatty alcohol or a combination thereof. 
     
     
         12 . The method of  claim 1  wherein said composition comprises at least one member selected from the group consisting of halophors of nonionic surfactants; halophors of amphoteric surfactants; iodophors, chlorophors and bromophors of anionic surfactants; halophors of glycol ether or polyvinylpyrrolidone; hypohalites; hypohalates; perhalates; iodine, chlorine, bromine, and fluorine; optionally wherein said halogen salt is an alkali metal or alkaline earth metal halide salt, hypohalite, hypohalate, or perhalate. 
     
     
         13 . The method of  claim 1  wherein said composition comprises at least one member selected from the group consisting of iodophors nonionic surfactants, iodophors of amphoteric surfactants; iodophors of cationic surfactants; iodophors of anionic surfactants; iodophors of glycol ether; and iodophors of polyvinylpyrrolidone. 
     
     
         14 . The method of  claim 1  wherein said composition is a hypohalite, and optionally wherein said hypohalite is sodium hypochlorite. 
     
     
         15 . A composite object made according to  claim 1 , wherein said object is used in the oil and gas industry, and optionally wherein said object comprises bridge or frac plug mandrels, wedges, sleeves, noses, cones, mule shoes, extrusion limiters, slips, baffles, landing seats, frac balls, wireline tools, housings for measurement-while-drilling, housings for logging-while-drilling, or tubular parts. 
     
     
         16 . A composite object
 pretreated with a surface treatment composition comprising at least one halogen complex which is an iodophor and electrostatically coated, and optimally wherein said iodophor is an iodophor of polyethoxylated nonylphenol, an iodophor of polyethoxylated fatty alcohol or combination thereof; or   used in the oil and gas industry wherein said object is pretreated with a surface pretreatment composition comprising at least one halogen, a halogen salt, a halogen complex or combination thereof, wherein said halogen is iodine and electrostatically coated; or   used in the oil and gas industry wherein said object is pretreated with a surface pretreatment composition comprising at least one member selected from the group consisting of halophors of nonionic surfactants; halophors of amphoteric surfactants; iodophors, chlorophors and bromopbors of anionic surfactants; halophors of glycol ether or polyvinylpyrrolidone; hypohalites; hypohalates; perhalates; iodine, chlorine, bromine, and fluorine and electrostatically coated.   
     
     
         17 . A method of manufacturing a composite downhole tool comprising:
 a) pretreating a surface of said composite object with a composition to induce conductivity;   b) applying a charge to said object after surface pretreatment; and   c) electrostatically applying a coating material to said object.   
     
     
         18 . The method of  claim 17  further comprising cleaning the surface of said composite object prior to pretreating, and optionally comprising utilizing acetone or denatured alcohol to clean said surface. 
     
     
         19 . The method of  claim 17  wherein said composite downhole tool comprises bridge or frac plug mandrels, wedges, sleeves, noses, cones, mule shoes, extrusion limiters, slips, baffles, landing seats, frac balls, wireline tools, housings for measurement-while-drilling, housings for logging-while-drilling, or tubular parts. 
     
     
         20 . A composite downhole tool pretreated with a surface treatment composition and electrostatically coated, wherein said surface treatment composition comprises
 at least one halogen complex which is an iodophor, and optionally wherein said iodophor is an iodophor of polyethoxylated nonylphenol, an iodophor of polyethoxylated fatty alcohol or combination thereof; or   at least one halogen, a halogen salt, a halogen complex or combination thereof, wherein said halogen is iodine; or   at least one member selected from the group consisting of halophors of nonionic surfactants; halophors of amphoteric surfactants; iodophors, chlorophors and bromopbors of anionic surfactants; halophors of glycol ether or polyvinylpyrrolidone; hypohalites; hypohalates; perhalates; iodine, chlorine, bromine, and fluorine; and   optionally wherein said composite downhole tool comprises bridge or frac plug mandrels, wedges, sleeves, noses, cones, mule shoes, extrusion limiters, slips, baffles, landing seats, frac balls, wireline tools, housings for measurement-while-drilling, housings for logging-while-drilling, or tubular parts.