Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1986-05-01
1987-08-18
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175424, E21B 1018
Patent
active
046870679
ABSTRACT:
A three cone rock bit is disclosed having at least a pair of mini-extended nozzles extending from a dome portion of the bit. Two 120.degree. leg segments contain extended nozzles, a third 120.degree. segment is nozzleless. The mini-extended nozzles convert hydraulic pressure to kinetic fluid flow energy with a minimum of flow disturbance, thereby delivering a concentrated flow of fluid against the floor of the formation and across the cutting face of the bit, sweeping detritus past the nozzleless 120.degree. leg segment and up the borehole. A centerjet mini-extended nozzle may additionally be positioned in the rock bit dome to further enhance borehole penetration.
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Chia Weng-Kwen R.
Crouse Richard D.
Oliver Michael S.
Smith Richard D.
Bagnell David J.
Novosad Stephen J.
Smith International Inc.
Upton Robert G.
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