Patent ID: 7615516

Claim:
A method of adding an oil field chemical to a fluid comprising: providing a fluid selected from the group consisting of water; mixtures of hydrocarbons and water; mixtures of hydrocarbons, water and gas; mixtures of hydrocarbons, water and solids; mixtures of hydrocarbons, water, gas and solids; mixtures of water, gas, and solids; and mixtures of water and solids; introducing an oil field chemical-containing microemulsion to the fluid, where the oil field chemical-containing microemulsion comprises: a non-aqueous internal phase comprising the oil field chemical, where the oil field chemical additionally has a surfactant property and the oil field chemical is present in an amount effective to form a stable microemulsion of droplets of the internal phase in the external phase; and an aqueous external phase; and breaking the microemulsion to add the oil field chemical to the fluid.