**4. Conclusion**

In synopsis; aluminum drill pipe is subjected to less strain than steel drill pipe. This is due to their lower modulus of elasticity and lighter density than steel drill pipe. Which leads to a good fatigue resistance even at the simultaneous presence of high applied torque and axial load, and severe doglegs, which makes the use of other options Steel drill pipe impractical from the fatigue failure standpoint. The limiting factor for using aluminum drill pipe in such severe conditions is not the fatigue resistance of the material that the pipe is made of, but the high contact forces between the wellbore and aluminum drill pipe.

*Mechanical Resistance of a Superficially Treated Alloy Drill Pipe during Onshore Drilling DOI: http://dx.doi.org/10.5772/intechopen.101867*
