A TORQUE ESTIMATION METHOD TO AID AN INTELLIGENT MANAGEMENT SYSTEM FOR OIL WELLS AUTOMATED Topics: Expert Systems for Industry; Intelligent Fault Detection and Identification; Knowledge-Based Systems Applications; Mechatronic Systems In Proceedings of the First International Conference on Informatics in Control, Automation and Robotics - Volume 1: ICINCO, 270-275, 2004 , Setúbal, Portugal