Apparatus for producing deep boreholes

Details Apparatus for producing deep boreholes Apparatus for producing deep boreholes

1978-05-24

1980-01-29

Leppink, James A.

Boring or penetrating the earth

With heating or cooling drilling fluid

175 70, 175 72, 175107, 175104, C09K 700, E21C 706

Patent

active

041857038

ABSTRACT:
This invention concerns the production of very deep boreholes. A rotary drilling tool is suspended at one end of a very long line of supporting elements such as a cable. During at least the entire duration of the drilling operation, the borehole is filled at least partly with at least one substance which remains in a liquid state and has a density greater than the mean density of the drilled ground strata. Thus any infiltrations in the borehole and the drilling debris move naturally upwards to the free surface of the liquid substance filling the borehole.

REFERENCES:
patent: 678045 (1901-07-01), Seltner
patent: 1396625 (1921-11-01), Corrigan
patent: 1419068 (1922-06-01), McFadden
patent: 1877225 (1932-09-01), Capeliuschnicoff
patent: 2595126 (1952-05-01), Causey
patent: 3195661 (1965-07-01), Jackson et al.
patent: 3509949 (1970-05-01), Kukihara
patent: 3743037 (1973-07-01), Bulakh et al.
patent: 3773121 (1973-11-01), Ikeda
patent: 3935910 (1976-02-01), Gaudy et al.
patent: 3945445 (1976-03-01), Ikeda

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