Application of Model Test in Analyzing Drill Pipe

Based on similar theory and using model test,mainly researches the torsional strain of the drill pipes in the condition of neglecting the geometry size of the drilling bit,drill collar,kelly bar and not considering joint impact.The rules of the torsional strain difference between two drill pipes can be gained by modeling and analyzing 50、89 drill pipes in the same boundaries.These improve the more complete understanding of dill pipe and have the reference gist for the drill pipe design optimization,which provide guidance gap in engineering drilling.