A revisit to the Lekhnitskii-Amadei solution for borehole stress calculation in tilted transversely isotropic media

A wellbore drilled in pre-stressed formations concentrates the far-field stresses. These concentrations often lead to borehole instability producing breakouts, drilling-induced fractures, or complete failure. In isotropic rock masses this problem has been extensively studied. However, fewer studies attempt to understand borehole failure in more realistic rocks characterized by both elastic and strength anisotropy. A program to calculate the...