During this research, two requirements have been used: the Mohr–Coulomb (M–C) criterion plus the multi-weak-plane strength criterion for shale formations. These are typically used to carry out exploration and obtain the optimization from the failure criteria for shale–sandstone interbedded reservoirs. The Patchy Plane of Weak point criterion extends Jaeger’s https://medium.com/@vertechs/innovations-in-mpd-drilling-revolutionizing-well-control-3ea0e8bc5ffb