Float Shoe

A guide shoe run on the bottom of the casing string that incorporates a ball or spring-loaded backpressure valve which prevents wellbore fluid from entering the casing while the pipe is lowered in the well. Performs the same function as the float collar.

Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards


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