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.
Famous quotes containing the word shoe:
“A little neglect may breed mischief ... for want of a nail, the shoe was lost; for want of a shoe the horse was lost; and for want of a horse the rider was lost.”
—Benjamin Franklin (1706–1790)