During the activation of a blind shear ram in an emergency, what is the specific pressure requirement for the hydraulic control pod to ensure a complete seal of the open hole?

To ensure a complete seal of an open hole during an emergency, a blind shear ram—a heavy-duty steel device designed to fully block the wellbore and cut through any pipe inside—must be activated by hydraulic control pod pressure that significantly exceeds the current wellbore pressure. Because the wellbore acts like a pressurized pipe pushing back against the ....