Casing shoe, also called guide shoe or cement shoe, in drilling is a short, specially designed piece of equipment installed at the very bottom of a casing string to facilitate running the casing into the wellbore and to support cementing operations. It typically has a rounded, tapered, or reinforced profile that helps guide the casing past irregularities, ledges, or tight sections in the hole, reducing the risk of damage to the casing or wellbore. During cementing, the casing shoe allows drilling fluid and cement slurry to exit the casing and flow into the annular space between the casing and the formation. By protecting the casing end and aiding proper cement placement, the casing shoe plays an important role in achieving correct casing depth, maintaining well integrity, and establishing effective zonal isolation.
