Longyear Tm, Inc.

Todd A Nevenner

Robert Eugene Able

Kristian S Drivdahl

Kenneth Carl Altrichter

Erik M Gaugh

Drew Mark Butler

A drill head assembly includes a shaft having a shaft axis, an oscillator assembly operatively associated with the shaft, the oscillator assembly having at least one eccentrically weighted rotor configured to rotate about a pivot point to generate an oscillating vibratory force, wherein an oscillation centerline is defined transverse to the shaft axis and including the pivot point. The drill head assembly also includes a lower bearing coupled to the shaft on a first side of the oscillation centerline and an upper bearing coupled to the shaft on a second side of the oscillation centerline, the second side being opposite the first side.

Methods of preloading a sonic drill head and methods of drilling using the same

Sonic drill head

A method for making drill bits includes sequentially moving a plurality of drill bits through a belt furnace, and moving the drill bits to a cooling station using an automated device after the drill bits have moved through the belt furnace. A continuous process for making core drill bits may also include placing a drill bit on a belt of a belt furnace, transporting the drill bit through the furnace using the belt, removing the drill bit from the belt using an automated process, and cooling the drill bit.

Process of drill bit manufacture

Growing community of inventors

Murray, UT, United States of America

Todd A Nevenner