Ensign Energy Oil Well Service Rig - By David Nicholson
Here's more of David Nicholson's scratchbuilt oil well service rig using Promotex wheels and tires. The platform on the back lifts, the derrick moves up and down, and stabilizing rams on the back lift up and down. Modeled after an Ensign Energy (Alberta, Canada) rig. Featured previously in Photo Gallery 759.
