PROCESSO PARA REDUCAO DA QUEDA DE PRESSAO EM UM CONDUTO QUE FLUI UM MATERIAL REDUTOR DE ARRASTO E PROCESSO PARA PRODUCAO DE OLEO

摘要

Method for reducing pressure drop in a conduit carrying a viscous drag reducing material by injecting a lower viscosity liquid which is immiscible with the drag reducing material at the periphery of the conduit to form a flowing annular layer of such lower viscosity liquid thereby reducing the pressure drop in the conduit.