Hydro-mechanical device for underground drilling

Boring or penetrating the earth – Boring by directly applying heat to fluidize or comminute – Combustion is confined chamber having restricted discharge...

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175 19, 175 92, 175296, 175381, E21B 714

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active

050885685

ABSTRACT:
A hydro-mechanical device for underground drilling for use with a drilling rig comprises a container having a combustion chamber, an ignition system, inlets for introducing a fuel, an oxidizer, a liquid into the combustion chamber, a nozzle for discharging combustion products, a piston slidably mounted in the container and a reamer connected to the piston. The ignition system provides electro-discharges in the fuel, oxidizer, liquid mixture. Each electro-discharge has an explosive nature and produces combustion products having a high pressure. Combustion products are ejected through the circular nozzle surrounding the container to provide a thermal drilling action. The movable piston is pushed downwardly by the products of electro-discharge and causes the reamer to penetrate rocks or a frozen ground to provide a percussion drilling action. By the use of combined effect of thermo-percussion drilling, holes of significant depth can be drilled and rocks or frozen ground of high hardness can be pierced. The present invention is adapted for underground and undersea drilling.

REFERENCES:
patent: 2675993 (1954-04-01), Smith et al.
patent: 2694550 (1954-11-01), Aitchison et al.
patent: 3212592 (1965-10-01), Rolseth et al.
patent: 4076082 (1978-02-01), Baum et al.
patent: 4519453 (1985-05-01), Riddiford

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