Abstract: A system for supporting a table bushing of a drill rig during a drill-bit changing operation is provided. The system includes a bushing support bracket mounted to a breakout wrench and having support arms arranged to engage the table bushing as a drill string is raised. The support arms are arranged to support the table bushing away from a deck opening and hold the table bushing in an elevated supported position while a drill bit is removed from or installed onto the drill string.

Abstract: A drill bit handling and changing system includes a deck wrench assembly mounted on a deck of a mast of a drill rig and arranged to break the bit from a drill pipe of the rig, and a bit changing mechanism slidably disposed on the deck wrench assembly between a standby position and an engaged position where the bit changing mechanism is centered with the drill bit and/or drill pipe. The bit changing mechanism includes a carousel having a plurality of receptacles, at least one of the receptacles being empty to receive a used drill bit and at least two receptacles holding new drill bits to be connected with the drill pipe after the used drill bit is removed from the drill string. The bit changing mechanism includes a slewing drive arranged to rotate the carousel to present an empty receptacle or a new drill bit to the drill pipe.