"We're designed to work well in terms of the normal -- if there is a normal -- drilling mode, " he says.

CNN: John D. Sutter

Drilling a 2 or 3 foot hole can be done with normal equipment, while drilling a ten, fifty, or one hundred foot diameter vertical hole would require an entirely new invention.

FORBES: Why Can't We Start Building The World's Deepest Building?

Fracking is the underground fracturing of very deep underground shale deposits where natural gas is sequestered and then is recovered using normal process procedures of deep and horizontal drilling for recovering natural gas.

FORBES: Intelligent Investing