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.
- "Casing shoe". Oilfield Glossary. Schlumberger Limited. http://www.glossary.oilfield.slb.com/Display.cfm?Term=casing%20shoe. Retrieved 2008-02-02.
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