Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft
Patent
1984-08-22
1986-05-27
Jillions, John M.
Boring or penetrating the earth
With storage means for bit lubricant carried by bit or shaft
175337, 175374, E21B 910, E21B 1022, E21B 1014
Patent
active
045910081
ABSTRACT:
This invention discloses a method to protect the lubrication reservoir system for sealed bearing rotary cone rock bits. A multiplicity of flush-type tungsten carbide inserts are positioned in each leg of the rock bit surrounding the lubrication reservoir cover cap. The inserts prevent erosion of the leg around the cover cap, thus protecting the snap ring that secures the cover cap within the reservoir chamber.
REFERENCES:
patent: 3130801 (1964-04-01), Schumacher, Jr.
patent: 3134447 (1964-05-01), McElya et al.
patent: 3513728 (1970-05-01), Hudson et al.
patent: 4055225 (1977-10-01), Millsapps
patent: 4140189 (1979-02-01), Garner
patent: 4343371 (1982-08-01), Baker, III et al.
patent: 4359113 (1982-11-01), Morris
patent: 4421184 (1983-12-01), Mullins
Hannon Thomas R.
Jillions John M.
Smith International Inc.
Upton Robert G.
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