Baker Hughes Oilfield Operations LLC

Sui-Long Lam

Volker Peters

Hanno Reckmann

Andreas Hohl

Christian Herbig

Armin Kueck

Dennis Heinisch

Vincent Kulke

Mathias Tergeist

Systems and methods for damping torsional oscillations of downhole systems are described. The systems include a downhole drilling system disposed at an end of the downhole system in operative connection with a drill bit. A damping system is installed on the downhole drilling system, the damping system having at least one damper element configured to dampen at least one HFTO mode. At least one mode-shape tuning element is arranged on the drilling system. The at least one mode-shape tuning element is configured and positioned on the drilling system to modify at least one of a shape of the HFTO mode, a frequency of the HFTO mode, an excitability of the HFTO mode, and a damping efficiency of the at least one damper element.

Optimized placement of vibration damper tools through mode-shape tuning

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Lower Saxony, Germany

Sui-Long Lam