Abstract: Oil-water separation is frequently encountered in petroleum production engineering. Up to now, this is done mostly by gravity separation technique. Since 80's an important breakthrough has been made in using hydrocyclones for liquid-liquid separation. A geometrical configuration of hydrocyclones, called type F, developed by the researchers from Southampton University, England in 1988 is the most typical ones which consists of double cones and a cylindrical part, and is considered as a standard configuration...