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casing shoe

n. (context engineering English) In drilling, a bull-nose shaped device, known as a '''guide shoe''' or '''casing shoe''', is attached to the bottom of the casing string and a casing hanger, which allows the casing to be suspended from the wellhead, is attached to the top of the casing.

Wikipedia
Casing shoe

In oil drilling and borehole mining, a casing shoe or guide shoe is a bull-nose shaped device which is attached to the bottom of the casing string. A casing hanger, which allows the casing to be suspended from the wellhead, is attached to the top of the casing.