The vertical centrifuge http://www.kosun.us/drilling-waste-management/vertical-centrifuge.html makes its contribution with its innovative process after the shale shaker completes its task. Cuttings that pass over the shaker typically have an average of 30% to 50% ROC (Retention on Cuttings) when they enter the proprietary auger system and begin to cycle through the VERTI-G cuttings dryer. The initial processing is done with a vertical cutting dryer that utilizes centrifugal force to take advantage of their differing densities to separate the largest portion of the remaining drilling fluid from the cuttings. The processed cuttings are discharged from the vortex dryer into the adjacent shale bin, and then have an average ROC between 4% and 7% once processing is complete. This ROC percentage represents cuttings suitable for immediate disposal requiring minimal if any further stabilization. Processed waste material is lighter, less toxic and is a more cost-efficiency.
High-speed Centrifuge for Maximum in Liquid/Solid Separation
The vertical centrifuge incorporates a high-speed vertical centrifuge that achieves maximum liquid/solid separation in large-volume processing. This mechanism makes the VERTI-G dryer one of the industry’s best performing and most dependable cutting dryers. The VERTI-G dryer gives operators a critical advantage in meeting increasingly stringent environmental rules for cuttings disposal. The flow of cuttings into the VERTI-G dryer is PLC-controlled and continuously fed to yield optimum liquid/ solid separation. Once cuttings are introduced into the dryer’s charge hopper, widely spaced, independently adjustable flights continuously direct cuttings to the shaker screen surface. Flights are tungsten carbide coated to reduce abrasion and ensure optimum tolerance.
KOSUN Vertical Centrifuge uses centrifugal force to dry drilled solids in oil or synthetic base fluids. A stainless steel screen bowl traps “wet” solids and accelerates them up 900 RPM. Liquid is forced through the screen bowl openings, while “dry” solids are extracted by the angled flights attached to the cone, which rotate slightly slower than the bowl. Tungsten carbide protects the flights from abrasive solids and ensures long operational life. This aids in maintaining a constant gap between the scroll and screen bowl, which is crucial for proper operation. KOSUN Cutting Dryer has been done with strict balance testing for all major rotary components to minimize vibration & noisy.