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Device used in drilling
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.
References
"Casing shoe". Oilfield Glossary. Schlumberger Limited. Archived from the original on 2006-10-17. Retrieved 2008-02-02.
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