A system for delivering a tubular pipe segment from a ground level to an elevated drill rig floor. A pipe assembly system based at the ground level includes a bucking unit for connecting a first joint and a second joint to form the tubular pipe segment, a powered first conveyor for moving the first joint into the bucking unit, a first staging pipe rack, a powered second conveyor for moving the second joint into the bucking unit, and reversible for moving the tubular pipe segment out of the bucking unit, a second staging pipe rack for storing a plurality of joints, and a transfer pipe rack for storing a plurality of tubular pipe segments.