centrifuge
A rapidly rotating flywheel on a vertical axle to whose rim is attached a series of tubes at one end, the other end being free to tilt upwards and outwards. At high speeds, the centrifugal force in the tubes is far greater than gravity. The centrifuge is used to expel fluids from core samples, either to clean them or to
Detailed Explanation
desaturate them for measurements of irreducible water saturation, resistivity index or nuclear magnetic resonance properties. It can be used at multiple speeds to obtain a capillary pressure curve. Centrifuges are also used in studies of clay mineralogy, where micron-scale fractions are extracted from suspension and subjected to analysis by X-ray diffraction (XRD).