Abstract: An apparatus for performing earth borehole operations comprising a base or substructure, a mast mounted on the base, a top drive mounted on the mast for longitudinal movement therealong, the top drive having an opening therethrough and a coiled tubing injector mounted on the mast above the top drive such that coiled tubing from the tubing injector can pass through the opening in the top drive, the apparatus being operable to selectively use the top drive to engage and manipulate a component used in borehole operations while the coiled tubing injector is substantially inoperative and selectively operable to use the coiled tubing injector to inject coiled tubing into an earth borehole while the top drive is substantially inoperative or alternatively using the coiled tubing injector to inject coiled tubing into a tubular string being manipulated by the top drive.