Entrance hole size (perforation)
Input(s)
\(\sigma_{y}\): Yield Strength of Casing of Interest (ksi)
\(\sigma_{y r}\): Yield Strength of Reference Casing (ksi)
\(d_{r}\) : Entrance Hole Diameter in Reference Casing (in.)
Output(s)
d: Entrance Hole Diameter in Casing of Interest (in.)
Formula(s)
\[
d=\left(\frac{\sigma_{y r}}{\sigma_{y}}\right)^{0.5} d_{r}
\]
Reference(s)
Bell, W. T., Sukup, R. A., & Tariq, S. M. (1995). Perforating. Henry L. Doherty Memorial Fund of AIME, Society of Petroleum Engineers, Page: 50.