A centralizer is an equipment used to keep sheath center of wellbore to ensure good placement of cement sheath around casing string. A continues 360 annular space around casing leads cement to complete seal the casing to borehole wall. The bows of welded type centralizer are bend with the dies and bows are not directly in contact with whole pipe so no contact between bows and hole pipe results the less friction between centralizer and hole pipe. In the Welded semi rigid type centralizers introducing bending of bows improve bow strength to hold the weight of outer pipe or hole pipe results high resistance power. The study of Different Models in order to Test the Centralizer, Stop Collar and Float Equipment. The Purpose of Testing of Centralizer to Examine the Starting, Running and Restoring Force of Centralizer and Float Equipment for Ductility and high Pressure and High Temperature Test as they uses in oil Field Industry. The Resulting Data from these Tests are meant to check the Quality as well as basis for Improving the Design of Centralizer, Stop Collar and Float Equipment.