Abstract: A swivel arrangement especially suitable for connecting the back end of a reaming tool to the front end of utility cable during installation of the latter underground is disclosed herein. This arrangement includes a swivel mechanism which is smaller in cross-section than the reaming tool and utility cable apparatus, for connecting the swivel mechanism to and between the reaming tool and utility cable, whereby to create an axially extending radial gap between the tool and cable. In accordance with one feature of the disclosed swivel arrangement, one end of the swivel mechanism is fixedly connected to the back end of the reaming tool to prevent relative lateral moement between the tool.

Abstract: A nozzle assembly for enlarging an inground passageway produced by, for example, a boring device is disclosed herein. The nozzle assembly is comprised of a longitudinally extending nozzle body defining an interior cavity adapted to receive fluid under pressure from an external source and at least one arrangement of outwardly facing adjacent stepped surfaces which provide longitudinally spaced cutting jets directed normal to the movement of the boring device and nozzle assembly as the latter moves through a previously provided passageway in order to progressively enlarge the passageway.