Float Shoe

A rounded profile component attached to the downhole end of a casing string. An integral check valve in the float shoe prevents reverse flow, or U-tubing, of cement slurry from the annulus into the casing or flow of wellbore fluids into the casing string as it is run. The space between the float or guide shoe and the landing or float collar. The purpose of a is to keep the trailing edge of cement, which can become contaminated with drilling fluid while pumping down inside a pipe, from being displaced out the end of the casing and resulting in a wet shoe.