International Workshop on MicropilesSeattle, Washington

September 24-27, 2003

Sonic Drilling

Applications in Micropiles

What is a Sonic Drill?

A drilling system that uses the principle of resonance to drill a hole and install a casing in practically any type of ground.

Basically, the drill head is a variable frequency generator that imparts resonant energy to the drill string.

Sonic Drill Features

A Sonic Drill… Is capable of installing casing up to 12”

in diameter, in practically any material. Provides a relatively undisturbed core

sample over the entire length of the hole Drills dry – no drilling mud necessary

Sonic Samples

Till 6” Granite

Sonic Drill Features

A Sonic Drill… Produces very little cuttings, which

significantly reduces disposal costs Can be track, wheel, skid, barge, or rail

mounted. Is modular in design – for helicopter

work

Barge System

Rail System

Boston Tunnel Project

Arctic System

Sonic Drill Features

A Sonic Drill… Can be wheeled through a 42 inch

doorway Can drill under an 8-foot ceiling Can be adapted to diamond core or air

drill using a down-hole hammer Can use oil-field tubing, of various

thread forms and pipe lengths