Commonly a bullet-nosed shaped device installed at the bottom of the casing string is known as what?

• A. Float Shoe
• B. Drill Bit
• C. Casing Shoe
• D. Guide Shoe

Answer: (C)

The bullet-nosed piece at the bottom of a casing string is the casing shoe. Its shape is designed to ease the run into the wellbore and provide a smooth transition from the bore to the casing wall, which helps establish a proper space for cement to be placed behind the casing. This creates a reliable cementing path and a solid seat for the casing as it is cemented in place.

Different devices at the bottom of casing have other primary roles: a float shoe includes a one-way valve to prevent backflow of cement, a guide shoe helps steer and center the casing as it runs, and a drill bit is used for cutting rock, not part of the casing string.