Earth boring head

Details Earth boring head Earth boring head

1981-02-25

1983-05-24

Purser, Ernest R.

Boring or penetrating the earth

Boring without earth removal

175 21, 175385, 405184, E21C 900

Patent

active

043846246

ABSTRACT:
An earth boring head comprising a generally conical earth boring member having a forward portion and a rearward portion. At least one aperture is fashioned in a forward portion of the earth boring member for liberating a lubricating fluid around the rearward portion of the conical member as the member is moved through an earth formation. In a preferred embodiment the conical earth boring member is fitted with a generally conical pilot member coaxially mounted in front of the conical earth boring member.

REFERENCES:
patent: 281868 (1868-07-01), Rhoades et al.
patent: 1639731 (1927-08-01), Humiston
patent: 1993365 (1935-03-01), Englebright et al.
patent: 2162108 (1939-06-01), Newman
patent: 2349033 (1944-05-01), Elliott
patent: 2664273 (1953-12-01), Merrick
patent: 3805899 (1974-04-01), Hicks et al.

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