rotational vibration mitigation using a tuned mass torsional damper

摘要

patent summary: "rotational vibration mitigation using a tuned mass torsional damper". A vibration reduction apparatus includes: a damping assembly configured to be fixedly coupled to a wellbore component, the wellbore component configured to rotate within a wellbore in an earth formation, the damping assembly having a damping frequency that is adjusted relative to a selected natural vibration frequency of the downhole rotating component to reduce vibration due to component rotation.