Thermal drilling device

Details Thermal drilling device Thermal drilling device

1976-10-21

1978-02-28

Purser, Ernest R.

Boring or penetrating the earth

Boring by directly applying heat to fluidize or comminute

Combustion is confined chamber having restricted discharge...

266904, 431158, E21B 714

Patent

active

040760820

ABSTRACT:
A thermal drilling device which operates in a rotary or circumferentially oscillatory motion and which is particularly adapted for drilling geological formations comprises a drill body which has an interior combustion chamber with a bottom having an outlet defining a discharge nozzle. Means are provided for adding fuel components into the combustion chamber and for igniting them to generate hot gaseous products of combustion which are discharged through a nozzle slot arranged at the bottom of the combustion chamber. The nozzle slot extends diametrically of the drilling area at the bottom and slot outline or a plurality of slots arranged symmetrically relative to the longitudinal axis of the drilling body. In one embodiment the nozzle slot has a radially extending portion with the circumferential width of the slot increasing in a radial outward direction.

REFERENCES:
patent: 2266834 (1941-12-01), Walker et al.
patent: 2638976 (1953-05-01), Vixler
patent: 2725929 (1955-12-01), Massier
patent: 3172457 (1965-03-01), Hartmann et al.
patent: 3182734 (1965-05-01), Scott
patent: 3358783 (1967-12-01), Raynal et al.
patent: 3687375 (1972-08-01), Griffiths
patent: 3756511 (1973-08-01), Shinroku et al.

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