Process and apparatus for producing deep boreholes

Details Process and apparatus for producing deep boreholes Process and apparatus for producing deep boreholes

1976-12-10

1978-09-26

Purser, Ernest R.

Boring or penetrating the earth

Boring a submerged formation

Boring from floating support with submerged independent...

166288, 252 85R, 175107, 175 70, 175 72, C09K 700, E21C 706

Patent

active

041162854

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: 1455010 (1923-05-01), Swan
patent: 2043504 (1936-06-01), Blow
patent: 2161245 (1939-06-01), Cain et al.
patent: 2264449 (1941-12-01), Mounce
patent: 2267683 (1941-12-01), Johnston
patent: 2341572 (1944-02-01), Reed
patent: 2341574 (1944-02-01), Reed
patent: 2643094 (1953-06-01), Peter

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