1. n. [Drilling]

The bottom of the casing string, including the cement around it, or the equipment run at the bottom of the casing string.

Synonyms: shoe

See: bullhead,  float shoe,  plug and abandon

2. n. [Drilling]

A short assembly, typically manufactured from a heavy steel collar and profiled cement interior, that is screwed to the bottom of a casing string. The rounded profile helps guide the casing string past any ledges or obstructions that would prevent the string from being correctly located in the wellbore.

Synonyms: shoe

See: float shoe,  guide shoe