Casing shoe with flow operated diverter valve

A shoe for use with a casing or liner string, comprising:

• a tubular body;
• a nose:
• mounted to an end of the tubular body, and having:
• a chamber formed therein, a front port extending longitudinally from the chamber to an exterior of the nose, and a side port extending transversely from the chamber to the exterior of the nose;
• and
• a valve repeatedly shiftable between a deployment position where the front port is open and the side port is closed and a cleaning position where the front port is closed and the side port is open and comprising a piston disposed in the chamber and movable between the positions,
• wherein:
• the valve is configured to shift to the deployment position in response to forward flow through the shoe being less than a threshold flow rate,
• the valve is configured to shift to the cleaning position in response to the forward flow through the shoe being greater than the threshold flow rate,
• the piston has a cap portion formed at an end thereof,
• the cap portion has an aperture formed therein adjacent to a periphery thereof,
• the piston covers an inlet of the side port in the deployment position, and
• a solid portion of the cap portion covers an inlet of the front port in the cleaning position.