U.S. Patent No. 7,584,807 for Multiple Pulsejet Boring Device for rapidly boring through the ground having directional boring capabilities.
ABSTRACT:
A method and device for boring a hole through a material along a desired path includes an umbilical subsystem [2000] connected to a boring subsystem [3000] having a plurality of pulsejets [3100]. These pulsejets [3100] repeatedly receive and ignite a combustible fluid [7] in a combustion chamber [3230] causing a portion of the fluid [7] to be forced out of a nozzle [3260] at high speeds as a fluid slug [10] that impacts materials ahead of the pulsejet [3100].
Tags: combustion chamber, Device, directional, ground, high speeds, material, plurality, Pulsejet, pulsejets, University of Scranton