Directional drilling is an alternative means of installing or replacing underground utilities with only minimal site disruption or restoration costs. Directional boring is a two stage process. In stage one, a steerable drill head bores a pilot hole to a pre-designated point. In stage two, the drill head is removed and, depending on the size of the product being installed, is replaced with a reamer to help open the path. A swivel is inserted between the reamer and the product to be installed to allow the reamer to rotate without twisting the product. At this point the entire assembly is pulled back through the pilot hole to the entry pit.
