Rotatable drilling head

Details Rotatable drilling head Rotatable drilling head

1982-04-26

1983-09-06

Leppink, James A.

Boring or penetrating the earth

Common drive or advancing means for concurrently boring...

299 90, 299 18, 175394, E21B 1044, E21B 110

Patent

active

044023715

ABSTRACT:
A drilling head for use in mining operations comprises a cylindrical drum having an open rear end and defining an interior cavity, an exterior spiral arranged to forwardly advance mined particles, a nose spiral disposed in advance of the drum and arranged so as to rearwardly advance the mined particles, the exterior and nose spirals terminating generally at the front portion of the drum and together defining at least one recovery aperture through which the mined particles forwardly advanced by the exterior spiral and rearwardly advanced by the nose spiral can pass to the interior cavity, and an interior spiral disposed so as to rearwardly advance the particles which pass through the recovery aperture. An assembly of counter rotating drilling heads is also disclosed.

REFERENCES:
patent: 161865 (1975-04-01), Cook
patent: 1485455 (1924-03-01), Freda
patent: 1996347 (1935-04-01), Reppert
patent: 2562841 (1951-07-01), Compton
patent: 2770449 (1956-11-01), McCarthy
patent: 2810566 (1957-10-01), Parsons
patent: 2841379 (1958-07-01), Driehaus
patent: 3094397 (1963-06-01), Lopker
patent: 3642325 (1972-02-01), Mulvaney
patent: 4219239 (1980-08-01), Weikert et al.

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