A sub-ducting apparatus

摘要

A sub-ducting apparatus (10) comprising a sub-duct (12), and a remotely operable path-finding head (20) for facilitation of the subduct into a duct (1). The head is detachable at the end of the subduct and includes an expandable portion (20A, 20B) or a cutter (20C, 20D), as a result of which, twisted or jammed cables may be removed from the duct.