Today we made some progress, we drilled through the casing shoe. We continued to drill most of the day, but made little headway because of the loose, unconsolidated nature of the rock formation at this depth. We circulated mud to try and remove some of this material, but the bit could not advance very much. Near the end of the day, we decided to inject cement into this unconsolidated region to anchor the loose rock in place and make it easier to drill through. We are currently tripping out the drill string, and will inject cement tomorrow morning.