A magazine for holding a plurality of pipes, and a drive head including a drive member adapted to be coupled to a pipe. The drive member is aligned along a drive axis. The drilling apparatus includes a first drive mechanism for rotating the drive member about the drive axis, and a second drive mechanism...http://www.google.co.uk/patents/US6332502?utm_source=gb-gplus-sharePatent US6332502 - Pipe loading device for a directional drilling apparatus
