Drill bit and roller cutter for said drill bit

Details Drill bit and roller cutter for said drill bit Drill bit and roller cutter for said drill bit

1988-02-16

1989-05-23

Dang, Hoang C.

Boring or penetrating the earth

Processes

175355, 175363, 175364, 175376, 175378, E21B 1010, E21B 1016, E21B 1020

Patent

active

048321362

ABSTRACT:
A drill bit has a plurality of roller cutters mounted on a front face of the drill bit. The roller cutters are mounted in pairs which are equidistantly spaced from an axis of rotation of the drill bit. Each roller cutter is rotatably mounted in a saddle affixed on the front face. The roller cutters are reversibly mounted in their saddles. Each roller cutter includes a plurality of circumferentially extending cutting structures spaced apart along an axis of rotation of the roller cutter. The cutting structures are arranged non-symmetrically relative to a center plane through the roller cutter so that when a roller cutter is reversed, the location of kerfs cut by the roller cutter change.

REFERENCES:
patent: 1646620 (1927-10-01), Loy
patent: 3797592 (1974-03-01), Goodfellow
patent: 3863994 (1975-02-01), Fink
patent: 3981370 (1976-09-01), Bingham et al.
patent: 4399879 (1983-08-01), Liljekvist et al.
patent: 4454923 (1984-06-01), Tibussek

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