Float Shoe
The float shoe is similar to the guide shoe except it has a check valve to keep fluids from entering the casing from the bottom. The primary purpose is to hold the cement column in place in the annulus since the density of the cement is usually greater than that of the mud and it would tend to equalize the hydrostatic pressure difference by flowing back into the casing were it not for the check valve.
Float Collar
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Reamer Shoe
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Guide Shoe
The guide shoe is simply a plain end device run on the bottom of any type of casing with a cement or composite bottom and a restricted hole through the center. It is rounded on the bottom so it will pass easily into the well.
Cement Plug
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