Patent ID: 7584807

Claim:
A steerable boring device for boring a hole [ 5 ] through a material in a desired direction comprising: a) an umbilical subsystem [ 2000 ]; b) a boring subsystem [ 3000 ] connected to the umbilical subsystem [ 2000 ] having a plurality of pulsejets [ 3100 ] for combusting and firing a fluid [ 7 ], each pulsejet [ 3100 ] having: i. an inlet [ 3307 ] for receiving the combustible fluid [ 7 ]; ii. a combustion chamber [ 3230 ] in fluid communication with the inlet [ 3307 ] for receiving the combustible fluid [ 7 ]; iii. a valve [ 3207 ] coupled between the inlet [ 3307 ] and combustion chamber [ 3230 ] for controlling the flow of fluids [ 7 ] from the inlet [ 3307 ] into the combustion chamber [ 3230 ]; iv. a nozzle [ 3260 ] fluidically connected to the combustion chamber [ 3230 ] for accelerating and pointing fluids escaping from the combustion chamber toward said material; v. an ignition device [ 3240 ] coupled to the combustion chamber [ 3230 ] for initiating ignition of the combustible fluid [ 7 ] when activated; c) a controller [ 3310 ] for independently activating the valves [ 3207 ] and the ignition devices [ 3240 ] of the pulsejets [ 3100 ], thereby causing at least one pulsejet [ 3100 ] to fire with greater intensity than the remaining pulsejets [ 3100 ], thereby causing the boring device [ 3000 ] to bore a hole in a desired direction.