Dissolving barium sulfate scale with aqueous solutions of salts of carboxymethyl monocyclic macrocyclic polyamines

摘要: Barium sulfate scale can be removed from remote locations such as those in or around the borehole of a well extending into subterranean earth formation by contacting with an aqueous solution consisting essentially water,a monovalent cation salt monocyclic macrocyclic polyamine containing at least two nitrogen-linked carboxymethyl groups and enough basic compound to provide pH about 8.