Abstract: A method and apparatus for installing underground utilities using an offset head fluid jet drilling and reaming apparatus. The drill is maneuverable and provides means for remote sensing of orientation and depth. Embodiments are illustrated with single and multiple jet cutting orifices.

Abstract: A method and apparatus for installing underground utilities using an offset head fluid jet drilling and reaming apparatus. The drill is maneuverable and provides means for remote sensing of orientation and depth. Embodiments are illustrated with single and multiple jet cutting orifices.

Abstract: A hand held fluid jet drilling apparatus is described. The drill includes an elongated drill stem with a fluid jet nozzle on one end and a motor on the other end. High pressure fluid is supplied to the drill from an external power pack which also produces compressed air. The drill includes a high pressure swivel which allows the motor to rotate the nozzle while a continuous supply of fluid is present. The drill stem is spring mounted to provide protection to the operator. The swivel may also operate as an on-off valve which supplies flushing fluid while the drill is off. The drill is operable as a drill, reamer or slotting tool by suitable arrangement of controls. A second embodiment is illustrated which provides for continuous flushing with low pressure fluid during operation. The drill is also attachable to mechanical feed systems to extend face coverage.