While running in hole 13-3/8” shoe track, Driller noticed a sudden hold up happened. He suspected that the edge of float shoe was hooked up inside conductor shoe. Due to this DSV and NTP decided to pull the float shoe to rig floor for checking the condition. As the casing shoe was coming through the slips it caught slip segment, After inspecting the shoe and RIH casing Floor-man noticed that segment had moved from carrier position and informed driller to stop. TBT was held on removing and replacing slip segment. While repositioning segment it dropped to Cellar. No one injured.