Borehole Drilling Method


alt label
vibratory more like this
notation 5 more like this
definition A sonic or vibratory drill head works by sending high frequency resonant vibrations down the drill string to the drill bit, while the operator controls these frequencies to suit the specific conditions of the soil/rock geology. Vibrations may also be generated within the drill head. The frequency is generally between 50 and 180 hertz (cycles per second) and can be varied by the operator. Resonance magnifies the amplitude of the drill bit, which fluidizes the soil particles at the bit face, allowing for fast and easy penetration through most geological formations. An internal spring system isolates these vibrational forces from the rest of the drill rig. more like this
source Powers et al, 2007. Construction Dewatering and Groundwater Control: New Methods and Applications more like this
in scheme boreholedrillingmethod
has top concept
is primary topic of sonic
narrower vibrocore
broader sonic
top concept of boreholedrillingmethod