Drill bit

Details Drill bit Drill bit

1985-06-20

1986-08-12

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175393, 175418, E21B 1036

Patent

active

046050795

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 through the drill stem, a web for receiving a drill tip, and a sleeve attached about the body portion thereof, the web thereof having axially extending faces coutoured from the periphery of the body portion toward the axis thereof, and the sleeve extending from the body portion and in spaced apart axial relation to the contoured faces of the web in a manner to define drill cut receiving ports opening upwardly to the drill tip and downwardly to the bore of the body portion. The drill bit may be provided with a male keeper or retainer to mate with a complementary female receptor of the drill stem for interconnection of the drill bit to the drill stem.

REFERENCES:
patent: 2595962 (1952-05-01), Letts
patent: 3980805 (1976-09-01), Lipari
patent: 4183691 (1980-01-01), Van Melle
patent: 4330044 (1982-05-01), Orr et al.
patent: 4368789 (1983-01-01), Orr et al.

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