... handling operations that results in less non-productive time (NPT) and enables drilling in extremely challenging environments more efficiently. MWD measurement while drilling frequency drilling data acquisition drilling operation hohl drilling measurement Drilling Equipment torsional...

... eigenfrequency angular acceleration drillstring design dual-mass flywheel laboratory test hohl frequency range high-frequency torsional oscillation Introduction High-frequency torsional oscillation is a self-excited torsional vibration of the drillstring caused by the interaction of the drill bit...