Hydraulics 3 : A general term referring to how fluids move and unloads cuttings, etc. in a well. Most common in drilling to insure claring and effective pressure control
George E. King Engineering, 5000 Oilfield Terms: A Glossary of Petroleum Engineering Terms, Abbreviations and Acronyms, US 2010. http://gekengineering.com/Downloads/Free_Downloads /Glossary_of_Petroleum_Engineering_Terms_25_August _2010.pdf, (Oil - Amer) {593}