| breakout [`brā´kau̇t] ELECTRICITY A joint at which one or more conductors are brought out from a multiconductor cable. ENGINEERING Failure or collapse of a borehole wall due to stress anisotropy. MINING ENGINEERING To pull drill rods or casing from a borehole and unscrew them at points where they are joined by threaded couplings to form lengths that can be stacked in the drill tripod or derrick. |