Device for producing boreholes in coal or the like

Details Device for producing boreholes in coal or the like Device for producing boreholes in coal or the like

1981-11-24

1984-04-03

Purser, Ernest R.

Boring or penetrating the earth

With below-ground tool drive prime mover

Fluid rotary type

175 67, 415 80, 415502, E21B 718

Patent

active

044402422

ABSTRACT:
Apparatus for drilling geological formations includes a hydraulic motor through which a high pressure fluid is delivered to plural nozzles which define material cutting jets. A portion of the fluid supplied to the motor is diverted and employed to generate a torque which causes the rotation of the rotor of the motor which is mechanically connected to the drill head which includes the cutting jet defining nozzles. The apparatus is connected, typically by means of a hose, to a source of pressurized fluid and thrust nozzles maintain the correct position of the motor and associated drill during the boring operation.

REFERENCES:
patent: 1860214 (1932-05-01), Yeaman
patent: 2950087 (1960-08-01), Gregory
patent: 3576222 (1971-04-01), Acheson et al.
patent: 3844362 (1974-10-01), Elbert et al.
patent: 4003673 (1977-01-01), Eskeli
patent: 4012164 (1977-03-01), Eskeli
patent: 4333539 (1982-06-01), Lyons et al.

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