Patent ID: 8684104

Claim:
A detachable head for providing a cutting edge during a ramming operation of a pipe casing comprising: an external ring having a first diameter, wherein said first diameter is operatively sized to enable said external ring to engage with an outer surface of said pipe casing; a reaction ring having a second diameter, wherein said second diameter is smaller than said first diameter, and operatively sized to enable said reaction ring to engage flushingly against a front surface of said pipe casing; an internal ring having a third diameter, wherein said third diameter is smaller than both said first and second diameters, and operatively sized to enable said internal ring to engage with an inner surface of said pipe casing; and, wherein said reaction ring is secured between said internal and external rings, and wherein said detachable head is not fastened to said pipe casing and forms said cutting edge for guiding said pipe casing during said ramming operation of said pipe casing.