Boring or penetrating the earth – Boring by below ground recirculation of unsupported elements
Reexamination Certificate
2008-07-15
2008-07-15
Bagnell, David J. (Department: 3672)
Boring or penetrating the earth
Boring by below ground recirculation of unsupported elements
C175S065000, C175S206000, C166S075150
Reexamination Certificate
active
07398838
ABSTRACT:
A system and method for excavating a subterranean formation according to which a fluid is introduced into a vessel to draw a plurality of impactors into the vessel to form a suspension. The suspension is discharged from the vessel and into another vessel, and fluid is introduced into the other vessel to draw the suspension into the other vessel. A suspension is formed in the other vessel that is discharged towards the formation to remove a portion of the formation.
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Curlett Harry B.
Curlett Samuel R.
Harder Nathan J.
Padgett Paul O.
Bagnell David J.
Bracewell & Giuliani LLP
Coy Nicole
Particle Drilling Technologies, Inc.
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