Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1984-01-31
1985-09-24
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175393, 175422, E21B 1018
Patent
active
045427984
ABSTRACT:
A nozzle assembly for an earth boring drill bit of the type adapted to receive drilling fluid under pressure and having a nozzle bore in the bottom thereof positioned closely adjacent the well bore bottom when the bit is in engagement therewith with the bore having inner and outer portions. The nozzle assembly comprises a generally cylindrical nozzle member of abrasion and erosion resistant material, selected from a plurality of such members, each being of the same outer diameter but having passaging therein of different cross-sectional area. The nozzle member is adapted to be fitted in the inner portion of the nozzle bore in sealing relationship therewith for forming a first seal for the nozzle assembly. The nozzle assembly further comprises a locknut, separate from the nozzle member, for detachably securing the nozzle member in the nozzle bore, formed at least in part of an abrasion and erosion resistant material. The locknut has a threaded side wall engageable with the outer portion of the nozzle bore, and an aperture therethrough for enabling a stream of drilling fluid from the nozzle member to flow therethrough and being so configured in section as to receive a tool for turning the locknut to install it in and remove it from the nozzle bore.
REFERENCES:
patent: 3111179 (1963-11-01), Albers et al.
patent: 3131779 (1964-05-01), Rowley et al.
patent: 3189107 (1965-06-01), Galle
patent: 4392534 (1983-07-01), Miida
patent: 4400024 (1983-08-01), Ratcliff et al.
patent: 4429755 (1984-02-01), Williamson
Neuder William P.
Novosad Stephen J.
Reed Rock Bit Company
Rowold Carl A.
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