The primary purpose of this guide shoe is to guide the casing to depth when run with
large bore float equipment.
Another advantage is allowing a maximum amount of fluid to pass into the casing
and be debris tolerant.
The large orifice is also designed to allow the conversion ball and tube to pass
without hindrance through the guide shoe.
The guide shoe is designed to allow ample flow area should the composite tube rest
on the cement rather than pump through.