Devices, systems, and methods for high frequency oscillation mitigation

A method for mitigating damage from high frequency oscillation (HFO), comprising:

• identifying one or more contact points of a downhole drilling system;
• using the identified one or more contact points, identifying one or more contact regions of the downhole drilling system with a wellbore wall, wherein the one or more contact regions form at least one oscillation node independent of pressure;
• and
• based on the identified one or more contact regions, determining an installation location of an HFO mitigation mechanism on the downhole drilling system to modify an HFO waveform of the downhole drilling system, wherein modifying the HFO waveform comprises controlling flow associated with one or more components of a motor assembly.

A method for mitigating torsional oscillation, comprising:

• preparing a bending model for a bottomhole assembly (BHA) performing drilling operations in a dogleg of a wellbore;
• identifying one or more contact regions of an outer surface of the BHA with a wellbore wall in the dogleg, the one or more contact regions defining at least one oscillation node of the BHA;
• determining the at least one oscillation node is a pressure independent node;
• and
• based on determining the at least one oscillation node is the pressure independent node, transferring at least a first oscillation node of the at least one oscillation node uphole by modifying a design of the BHA and thereby changing the one or more contact regions such that they do not act as the first oscillation node, wherein modifying the design of the BHA comprises controlling flow associated with one or more components of a motor assembly.