... ,LTC,STC 3. Grade:k55,J55,N80,P110 float shoe for casing1. DescribtionThe float shoe which is connected at the end of casing ... string functions as guide or back pressure valve. It is ... /8”LCSG40CrSY/T5618-2000FX-FZQ34036531355010MPa13-3/8”LCSG40CrSY/T5618-2000 float shoe for casing