Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – With fluid pressure-actuated feed means
Patent
1987-07-30
1989-02-21
Neuder, William P.
Boring or penetrating the earth
With storage means for bit lubricant carried by bit or shaft
With fluid pressure-actuated feed means
175337, E21B 1018
Patent
active
048057096
ABSTRACT:
A drill bit for drilling into underground formations is disclosed, the drill bit having conduits for providing either lubricant or gaseous drilling fluid to the cutting cone bearings. In an alternate mode of operation, a mixture of lubricant and gaseous fluid is supplied to the bearings.
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Drummond Donald D.
Johnsey Walter F.
Drumco
Neuder William P.
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