The 398-page document provides the essential mathematical equations and templates used to calculate the performance properties of downhole tubulars. Key calculations include:
Old practices often ignored axial tension's effect on collapse. The re-emphasizes the API biaxial method: when you apply tension to a pipe, its collapse resistance decreases . The formula ( \sigma_z = \sigma_a + \sigma_b ) (axial stress plus bending stress) now includes more precise correction factors for tapered strings. api 5c3 pdf new
Yes. The title explicitly includes Casing, Tubing, Drill Pipe, and Line Pipe . However, for drill pipe specifically, you may also need API 7G (Drill Stem Design) for fatigue and torsional limits. The new 5C3 focuses on pressure and axial collapse. and Line Pipe . However