SIMULATION OF DRILL STRING VIBRATION DUE TO RISER'S OSCILLATION

In deep sea drilling, there are two major components of drilling tools that are
subjected to vibration, namely the marine riser and the drilling pipe. Analysis of
vibration in the marine riser and drill pipes are two topical areas that have individually
received considerable attention by researchers in the past. For the marine riser, the
focus was on the vortex-induced vibration (VTV) in different shear and flow regime.
On the other hand, the focus on the drill pipes was on different vibratory modes and
resonance. While these two subjects are interrelated, borne by the fact that the marine
riser encapsulates and protects the drill pipe, they have been little attempt to
investigate them together as an assembly.