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.