Abstract: A silo bin drilling system used for unclogging bulk material in a silo bin. The drilling system includes a hydraulic drill with drill motor. The drill is mounted above an access hole in a top portion of the bin. An access door in a bottom of the bin is used for forming a lower bin cavity in the material. The system also includes a pipe string. The pipe string is attached to a pipe string motor. A bottom of the pipe string is attached to a drill bit with foldable blades. The drill bit is used for drilling a cavity access hole through the clogged bulk material into the lower bin cavity. The pipe string motor then moves the drill bit with unfolded blades upwardly through the material drilling a large diameter raise hole until the clogged material collapses in the bin.