Casing Bore:
http://www.youtube.com/watch?v=u0EAN5cy1Ck

Tunnel Boring Machine:
http://www.youtube.com/watch?v=CFaz1DJIgNA

TBM - Tunnel Boring Machine Animation:
http://www.youtube.com/watch?v=PjWF4EoajV0

MTBM - Micro-Tunneling Machine Animation:
http://www.youtube.com/watch?v=EC9kECxaCXM 

GTBM - Guided Tube Boring Machine Animation:
http://www.youtube.com/watch?v=o-KGa49Ioqw

NOTE: The web sites listed above are intended as resources only. They are not a substitute for professional consultation. We recommended consulting our office before beginning any trenchless project.