HIGH-FREQUENCY

TORSIONAL OSCILLATION

High-Frequency Torsional Oscillations (HFTO) are a common problem when drilling hard and dense formations. HFTO excitation initiates at the PDC bit and self-perpetuates throughout BHA components below the motor power section. HFTO can cause rapid torsional fatigue to BHA components resulting in unexpected costs due to premature trips and damage. 

Below are solutions to help manage HFTO: