Drill bit

Details Drill bit Drill bit

1986-07-22

1987-12-08

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

With fluid conduit lining or element

175410, 175418, E21B 1060

Patent

active

047113120

ABSTRACT:
A drill bit for use in combination with a through-the-steel drill stem, the drill bit including an elongated body portion having a bore through which cuttings may be removed, a web extending transversely across the bore for receiving a drill tip, and drill ports leading from the drill tip to the bore and from the periphery of the body portion to the bore, the drill ports comprising opposed axially extending openings contoured as a hemisphere to define opposed axially extending faces of the web and opening to the bore from the drill tip and extending axially along the body portion and opening from the periphery thereof to the bore below the web. The drill bit may be provided with a sleeve to delimit the drill ports.

REFERENCES:
patent: 4330044 (1982-05-01), Orr et al.
patent: 4356873 (1982-11-01), Dziak
patent: 4603751 (1986-08-01), Erickson
patent: 4605079 (1986-08-01), Leibee et al.

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