Three-phase separation device using doubly-canted decanter

A three phase separation device for fluids, comprising means for enabling practicable three-phase separation of a fluid comprising heavy and light liquids and solids, including, a bowl for the fluid including a hollow cylindrical section having first and second ends, a canted section connected to said first end of said cylindrical section and having first and second portions of different tapering angles including a first portion adjacent said cylindrical section which is of a larger tapering angle than said second portion which is remote from said cylindrical section, a screw rotatably mounted in said bowl and extending through said cylindrical section and said canted section and having a screw thread conforming to the configuration of each section, a heavy liquid exit port on said second portion of said cylindrical section adjacent its exterior side, and a light exit port on said cylindrical section spaced radially inwardly of said heavy liquid exit port and near the surface of the fluid.