Centrifuges for oilfield applications were first introduced in the early 1950s. These early units were adapted from existing industrial decanting centrifuges. In the mid 1960s, a perforated rotor type machine was developed which does not perform like a pure decanter. Commonly called â€œbarite recoveryâ€ centrifuges, these early designs were limited in capacity and application. Today, the centrifuge is even more important part of solids control. In addition, the increased use of low-solids mud and environmental dewatering applications require higher process volumes, greater clarification and solids capacity, and additional fine solids removal. Equipment selection is decided by site specific requirements. Proper system selection is the first step to effective solids control.
A decanting centrifuge is so named because it Decants, or removes, free liquid from separated solids. A decanting centrifuge consists of a conveyor screw inside a rotating bowl. See figure below.