Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1986-11-26
1988-12-27
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175424, 239591, E21B 1018
Patent
active
047934263
ABSTRACT:
An improved nozzle retention system in an earth boring bit of the rolling cutter type using a pliable coating bonded to a nozzle retention snap ring in a manner to permit normal seating of the snap ring by bonding the coating only to the inner periphery and portion of a lower surface of the snap ring. The coating material disclosed is elastomeric, including nitrile rubber.
REFERENCES:
patent: 2868512 (1959-01-01), Sease
patent: 3052090 (1962-09-01), Herzog
patent: 3096834 (1963-07-01), Steen
patent: 3115200 (1963-12-01), Mandrell
patent: 4542798 (1985-09-01), Madigan
Bagnell David J.
Novosad Stephen J.
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