Rotary drill bit

Details Rotary drill bit Rotary drill bit

1980-04-01

1981-11-03

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175372, 277 88, 277 94, 308 82, E21B 1018, E21B 1022, F16J 1532

Patent

active

042980798

ABSTRACT:
A rotary roller bit comprising at least one rotatably carried roller cutter (12) and provided with sealing means (21) for preventing impurities from entering into the bearing system (14, 15, 16,) of the roller cutter. For purposes of preventing axial and wobbling movements of the roller cutter (12) relative to the bit head from creating high contact pressure at the contact surface between the sealing means (21) and the surface against which same seals the sealing means (21) is provided with an elastically yieldable tongue (25) which extends radially relative to the rotational axis of the roller cutter (12).

REFERENCES:
patent: 1945240 (1934-01-01), Tupica
patent: 3096835 (1963-07-01), Neilson
patent: 3193028 (1965-07-01), Radzimovsky
patent: 3199878 (1965-08-01), Cunningham et al.
patent: 3244459 (1966-04-01), Ortloff
patent: 3862762 (1975-01-01), Millsap
patent: 4183417 (1980-01-01), Levefelt

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