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float collar

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float collar [′flōt ‚käl·ər]
(petroleum engineering)
A specialized coupling device inserted in a casing string just above the bottom that contains a check valve to permit downward passage of fluid but not upward passage through the casing.


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Infant/Child Life Jackets: Should have a crotch strap, an oversized float collar to keep head out of water; and a grab loop for easy retrieval.
 
 
 
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