Drilling cost reduction is a major concern for geothermal operators and crucial to long-term geothermal development. Reducing drilling days and lowering per-foot costs are primary means to achieving this goal. Baker Hughes, Inc. (BHI) developed the Kymera hybrid bit with these goals in mind. The advantage of the Kymera bit technology versus standard tungsten carbide insert (TCI) bits is in the Kymera’s combination of roller-cone design and polycrystalline diamond compact (PDC) bit design. In trials at EnergySource’s Hudson Ranch II project, performance data from 12.25- in (311 mm) and 9.875- in (250.8 mm) Kymera bit runs are compared to TCI bit runs in offset wells. Performance is measured using a systematic approach comparing revolutions per minute (RPM) and rate of penetration (ROP) in both slide and rotating modes. Formation and depth are also factored into the performance data. The Kymera hybrid bit increased rates of penetration and total footage drilled per bit run, resulting in a significant reduction in cost per foot (CPF) versus standard roller-cone bits for a substantial cost savings.