BACKGROUND

This section is intended to provide relevant background information to facilitate a better understanding of the various aspects of the described embodiments. Accordingly, it should be understood that these statements are to be read in this light and not as admissions of prior art.

Check valves and other floating equipment can be installed above ground within a pipe or casing and used during downhole operations, such as for controlling fluid flow. The check valve is installed into a segment of pipe which is later connected to the casing. The valve is assembled into this segment via concrete, resin, or even threading. Problems may be caused during the downhole operation if a check valve becomes unattached or slips from within the casing.

Therefore, there is a need for a check valve assembly that reliably maintains a gas-tight seal with the inner surface of the casing under relatively high pressures commonly experienced during downhole operations.

