Casing running, Casing T&D, determines whether the casing can be run smoothly in wells during the cementing by calculating the friction drag and hook load. Based on the finite element analysis of pipe string mechanics model, the Casing T&D can analyze the string buckling, tensile resistance, twisting resistance, etc.. During the casing running, it can calculate the maximum borehole curvature that the casing can pass and support complex working conditions like float casing running.