Fluid drilling system with flexible drill string and retro jets

Boring or penetrating the earth – Processes – Boring with specific fluid

Reexamination Certificate

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Details

C175S424000, C299S017000

Reexamination Certificate

active

06866106

ABSTRACT:
A self-advancing drilling system comprising a drilling apparatus, the drilling apparatus having at least one leading fluid cutting nozzle, an advancing device on the drilling apparatus to provide forward movement to the drilling apparatus, the drilling system further comprising a drill string formed from recoverable flexible hose and a steering device having at least one jet nozzle.

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