How Do We Distinguish Net (Frac) Pressure from Friction Pressures?

Friction along the wellbore, through the perforations and the near-wellbore area of the fracture can hide from us what is truly happening with frac pressures downhole.  As VP of Engineering, Leen  Weijers, demonstrates here in a comparable situation while he inflates a bike tire, there is a simple solution to obtaining an accurate downhole – or bike tire – pressure measurement.