A method, system and computer program product for performing a drilling operation for an oil field, the oil field having a subterranean formation with geological structures and reservoirs therein. The method involves creating a finite-difference model to simulate behavior of a drilling assembly used...http://www.google.de/patents/US8014987?utm_source=gb-gplus-sharePatent US8014987 - Modeling the transient behavior of BHA/drill string while drilling