High-velocity jet digging method

Details High-velocity jet digging method High-velocity jet digging method

1976-03-12

1977-09-13

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring with specific fluid

37 78, 175422, 299 17, E21B 718

Patent

active

040475808

ABSTRACT:
The method of digging by piercing soil and rock with a jet of liquid discharged at high velocity from a nozzle together with high-velocity air jets discharged from another nozzle arranged concentrically around the liquid nozzle, characterized by the velocity of the air jets being at least half the velocity of sound.

REFERENCES:
patent: 3572839 (1968-08-01), Okabe

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