A method of separating drilling/production fluids from solid cuttings from a mixture received from down hole, without the use of shale shakers, de-sanders, or de-sanders, through the steps of flowing the mixture from the well bore into a flow line above the surface of a well; next, flowing the mixture into a single separation zone of a size capable of receiving the mixture directly from the flow line on a continuous basis; circulating or centrifuging the mixture to a desired RPM within the separation zone; providing a liquid permeable barrier surrounding the mixture as the mixture is centrifuged within the separation zone; collecting the liquid in a first retrieval zone after the liquid has penetrated permeable barrier; and collecting the solids that could not penetrate the permeable barrier in a second retrieval zone within the barrier. The flow into the separation zone may be at a rate of 50-2000 gallons per minute; while the permeable barrier is a screen with openings of a size within the range of 50 to 1500 microns. Also, the mixture is circulated at a rate of a range of 15 to 1200 RPM's in order to achieve separation to a suitable degree. The separation zone would include either a horizontal or vertical centrifuge apparatus.