Geology department at College of Science organized a workshop as training course for graduate students entitled CIRCULATION  SYSTEM. It has been presented by Mohammed jabbar obaid hosted from Al-Namariq United Company for Development and Training the workshop aims to develop students of geologists to work in oil companies, the lecture included an explanation Functions of a Drilling Fluid and Circulation system (Mud Pits, Mud Pump, Pump  Manifold, stand pipe, Annulus, shale shaker