1, Float collar and float shoe are one of the general necessary accessory of the under part of casing string.t he characteristic are as following :

1)      the inner component of the equipment is made up of drillable aluminium alloy

2)      the equipment can be connected directly with casing.

3)       eligible back-pressure air proof configuration, can reduce the resistance of grout or mud.

4)      Valve seat and valve core can effectively prevent the return of mud

5)      Intensity noumenon material equals to APIN-80steel grade.