Drop-in Check Valve
Drop-in Check Valve
Collection
Drop-in Check Valve
Collection
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Drop-in Check Valve short for DICV,which is an internal preventer.

It  is used to provide protection from backflow during periods when the drill string is left open or kicks are frequent.

The landing sub is installed just above the bit sub. The valve may either be installed with the landing sub or placed

in the drill string at the top and pumped down to the landing sub. Once seated it allows downward mudflow only.


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Standard
API SPEC 7-1