Drill bit with improved steerability

Details Drill bit with improved steerability Drill bit with improved steerability

1989-08-14

1991-04-02

Britts, Ramon S.

Boring or penetrating the earth

Bit or bit element

With bit guide or bore wall compacting device

175415, E21B 1046

Patent

active

050040570

ABSTRACT:
A drill bit offering improved steerability. Drill bits include gage sections which are adapted to facilitate deflection of the bits within a borehole to facilitate navigational or directional drilling. The gage portions of the bit may be arranged in an arcuate path around a portion of the periphery of the bit. Also, the bit portions may be spaced and adapted to serve, at least in part, as fulcrums, to facilitate deflection of the bit and the bringing of gage cutting portions of the bit in contact with the sidewalls of the borehole.

REFERENCES:
patent: 2553701 (1951-05-01), Comstock
patent: 3318400 (1967-05-01), Hildebrandt
patent: 3367430 (1968-02-01), Rowley
patent: 3825083 (1974-07-01), Flarity et al.
patent: 3883077 (1974-09-01), Lavallee
patent: 3978933 (1976-09-01), Olson
patent: 4176723 (1979-12-01), Arceneaux
patent: 4324297 (1982-04-01), Denison
patent: 4385669 (1983-05-01), Knutsen
patent: 4429755 (1984-02-01), Williamson
patent: 4515226 (1985-05-01), Mengel et al.
patent: 4602691 (1986-07-01), Weaver
patent: 4676324 (1987-06-01), Barr et al.
patent: 4714120 (1987-12-01), King
patent: 4733733 (1988-03-01), Bradley et al.
Eastman Christensen Co., Bit Style Book, section "Step-Type Bits (K-Series)", No. K851/M263, 1988.

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