Directional drill bit

Details Directional drill bit Directional drill bit

1996-12-23

1998-11-24

Bagnell, David J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175327, 175331, 175435, 761084, E21B 1000, B21K 504

Patent

active

058395253

ABSTRACT:
A roller cone or drag-type drill bit for use in drilling subsurface formations, especially useful for directional drilling, has a bit body with a shank portion for connection to a drill string, and a crown portion. Breaker slots are formed in the bit body at or immediately adjacent to the intersection of the crown portion and the shank portion. This location of the breaker slots allows the drill bit to be relatively shorter than comparable prior art bits with the breaker slots formed in the shank portion. The shorter length permits the present drill bit to be more easily steered in directional drilling applications.

REFERENCES:
patent: 4054772 (1977-10-01), Lichte
patent: 4275285 (1981-06-01), Jadach
patent: 4947945 (1990-08-01), Griffin

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