A retrievable center bit for use with a tubular including an inner bore
and a drill shoe cutter mounted thereon. The retrievable center bit may
include a body positionable in the bore of the tubular and including an
upper end, a lower end and a side outer surface extending therebetween. A
cutting surface may be supported on the lower end of the bit body. There
may be a locking assembly on the body for releasably locking the bit
axially and rotationally to the tubular. A longitudinal bore may extend
from the upper end into the body and the body may include a fluid port
extending from the bore to open on the cutting surface and a lateral
fluid port extending from the bore opening on the side outer surface
positionable adjacent the drill shoe cutter when the bit is locked to the
tubular.