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Dissertation Defense: Dynamics, Nonlinear Instabilities, and Control of Drill-Strings
October 2, 2020 @ 1:00 pm - 3:00 pm
Author: Xie Zheng
Professor Balakumar Balachandran, Chair
Professor Amr Baz
Professor Nikhil Chopra
Associate Professor Jin-Oh Hahn
Associate Professor Maria Cameron
Abstract: Drill strings are flexible, slender structures, which are many kilometers long, and used to transmit the rotary motion to the drill bit in the process of drilling a borehole. Due to the flexibility of the drill string and nonlinear interactions between the drill bit and rock, these systems often experience severe vibrations, and these vibrations may cause excessive wear of drill bit and equipment damage…. Click here to read more.