Process and installation for the congelation of grounds by means

Details Process and installation for the congelation of grounds by means Process and installation for the congelation of grounds by means

1985-05-29

1987-06-30

Corbin, David H.

Hydraulic and earth engineering

Temperature modification or control of earthen formation

405258, E02D 3115

Patent

active

046766944

ABSTRACT:
The injection of liquid nitrogen into the probe (2) is regulated in an on-off manner so as to maintain the temperature of the ground at the coldest point above a value within the range of between -140.degree. C. and -160.degree. C. so as to cause calefaction of the liquid nitrogen. The liquid nitrogen is alternately injected into the central passage (9) and into the annular passage (11) of the probe, these passages being thermally insulated from each other.

REFERENCES:
patent: 3220470 (1965-11-01), Balch
patent: 3267680 (1966-08-01), Schlumberger
patent: 4403459 (1983-09-01), Hurlbut

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