In honor of the Chilean mine rescue, I thought it appropriate to post this photo I took of a well being drilled and installed. In this photo the workers are welding sections of well casing together, to be installed in the already drilled hole.
The rescue tunnel in Chile was nothing more than a large diameter well, and drilled in a similar fashion to water and oil wells all around the world. I know from experience the hard work involved in drilling such a tunnel. Well drillers are hardy people, and I give everyone involved in the heroic mine rescue a huge thumbs up.