Boring or penetrating the earth – Processes – Boring with specific fluid
Patent
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
Yahiro Teruo
Yoshida Hiroshi
Chemical Grout Company, Ltd.
Kajima Corporation
Novosad Stephen J.
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