Sonic drilling method and apparatus

Details Sonic drilling method and apparatus Sonic drilling method and apparatus

1995-04-27

1996-08-27

Bagnell, David J.

Boring or penetrating the earth

Tool actuation by reaction of rotating eccentric mass

175 22, 175171, E21B 720, E21B 724

Patent

active

055491707

ABSTRACT:
A drill string is advanced into the ground by inducing vibrations in the drill string at a resonant frequency. The drill string has an opening at a downhole end leading to a hollow interior. As drilling progresses, a core enters the hollow interior. A casing is driven around the drill string to seal the borehole. Sonic advancing of the drill string minimizes waste materials and can be operated without a circulating fluid.

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