Float equipment for use with composite casing or liner string

A float collar for assembly with a composite string of downhole tubulars, comprising:

• a tubular housing made from a composite material and having threaded couplings formed at longitudinal ends thereof;
• a float valve disposed in a bore of the housing;
• a sheath connecting the float valve to the housing and sealing an interface between the float valve and the housing;
• and
• a guide operable to prevent side-tracking of a drill bit into the housing while drilling out the float valve and the sheath and comprising:
• a shield disposed adjacent to an inner surface of the housing and made from a non-drillable metal or alloy,
• wherein:
• the guide further comprises a plurality of stacked segments, each segment of the plurality of segments has an inner hub portion and an outer ribbed portion, and a frusto-conical profile formed at a top of the sheath;
• and
• the shield is a sleeve lining an inner surface of the housing at an interface between the sheath and the housing.