Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – Rotation of bit actuates lubricant feed means
Patent
1987-01-15
1988-03-01
Novosad, Stephen J.
Boring or penetrating the earth
With storage means for bit lubricant carried by bit or shaft
Rotation of bit actuates lubricant feed means
175340, 175356, 175374, 175394, E21B 1018, E21B 1020, E21B 1024, E21B 1044
Patent
active
047279435
ABSTRACT:
A drill bit for drilling into earth formations comprising a plurality of sections having connection means to connect said sections to form a unitary drill bit; means in said plurality of sections for storing and delivering lubricants to the cutting cones; and wear bar segments on said plurality of sections to form continuous wear bars about the periphery of said unitary drill bit thus reducing the wear on said unitary drill bit.
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patent: 4549616 (1985-10-01), Rumpp et al.
patent: 4591008 (1986-05-01), Oliver
Donaghy John K.
Novosad Stephen J.
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