Drill bit

Details Drill bit Drill bit

1977-06-13

1978-10-03

Purser, Ernest R.

Boring or penetrating the earth

With below-ground tool drive prime mover

With mechanical motion-converting means

175228, 175319, 299 85, E21B 106

Patent

active

041178971

ABSTRACT:
A drill bit comprising a body suspended in a well bore by an electrical cable which transmits power to a motor secured to the body and eccentric cam member rotated by the drive shaft of the motor and engagable with a plurality of reciprocal drill pins whereby the pins are sequentially impinged against the sidewalls and bottom of the well bore for producing a drilling operation.

REFERENCES:
patent: 1391626 (1921-09-01), Gilthorpe
patent: 2400853 (1946-05-01), Stilley
patent: 2797065 (1957-06-01), Houston
patent: 2859941 (1958-11-01), Carroll et al.
patent: 3517759 (1970-06-01), Crumbo

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