A method of consolidating permeable unconsolidated formations with an epoxy forming resin under controlled reaction and temperature conditions using three premixed solutions which are to be supplied to the field, one solution comprising epoxide dissolved in aromatic hydrocarbons, the second solution comprising a curing agent dissolved in aromatic and nonaromatic hydrocarbons and the third solution containing phenol and m.p. cresol dissolved in aromatic and nonaromatic hydrocarbons. By suitably choosing the amount of the third solution, the mixture of the three solutions can be used in a temperature range of from 20.degree. C. to 100.degree. C. A part of a permeable formation surrounding a well is treated with a resin-forming composition which on hardening at the formation temperature forms a film consisting of a hardened resin covering the surfaces of the sand grains of the formation.
A method of treating an underground formation is provided, the method including sequential steps of: (a) contacting the formation with an aqueous medium; (b) contacting the formation with a hydrocarbon fluid; (c) contacting the formation with a solvent in the form of a glycol ether; (d) contacting the formation with a consolidation solution of between 30 and 60 % m of monomeric and/or polymeric organic polyepoxides having more than one epoxy group per molecule and between 5 and 20% m of a curing agent in the solvent; and (e) contacting the formation with a viscosified fluid containing aliphatic hydrocarbons.
A composition is provided which, when applied to a metal surface, forms a corrosion-inhibiting film thereon. The composition comprises an epoxy resin, an effective amount of a curing agent for the epoxy resin, an alcohol, and a hydrocarbon diluent. The composition is applied by contacting the metal surface with the composition as one solution or as a hydrocarbon solution of the epoxy resin and a solution comprising the alcohol and the curing agent. The composition is particularly useful in the treatment of down-well metal surfaces in oil and gas wells to inhibit the corrosion of the metal.
In a process for completing and operating a well, which process involves passing carbon dioxide through a case, cemented and perforated well, carbon dioxide-induced damage of the cement is avoided by coating the cement tunnel walls so that the carbon dioxide is passed through perforation tunnels which have been internally coated by epoxy resin.
An epoxy resin composition curable to a hard impermeable solid which contains a liquid aromatic diluent having the general formula: wherein R.sub.1 is hydrogen; a straight or branched chain alkyl radical; a cycloparaffin radical or a mixture thereof; wherein the alkyl and cycloparaffin radicals have within the range of about 1 to 10 carbon atoms; and further wherein at least one R.sub.1 group is said alkyl or cycloparaffin radical.
A composition is provided which, when applied to a metal surface, forms a corrosion-inhibiting film thereon. The composition comprises an epoxy resin, an effective amount of a curing agent for the epoxy resin, an alcohol, and a hydrocarbon diluent. The composition is applied by contacting the metal surface with the composition as one solution or as a hydrocarbon solution of the epoxy resin and a solution comprising the alcohol and the curing agent. The composition is particularly useful in the treatment of down-well metal surfaces in oil and gas wells to inhibit the corrosion of the metal.
