Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1986-01-15
1987-05-19
Leppink, James A.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175371, 384 96, E21B 1022
Patent
active
046660003
ABSTRACT:
An improved retainer for a rotary cone rock bit and a method for inserting the same is disclosed. A cone cutter is mounted on a bearing pin of an arm of the rotary cone drill bit. Formed in the bearing pin and the inner wall of the cone cutter is an annular channel that is filled with discs through an insertion cavity and the insertion cavity is subsequently sealed. This enables the bearing surface and the bushing engaging the bearing pin to be substantially longer than heretofore possible and the wobble of the cone cutter about the bearing pin is reduced.
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"Varel Drilling Bits," Varel Manufacturing Company, p. 6783 (undated).
Leppink James A.
Meier Harold E.
Melius Terry Lee
Varel Manufacturing Co.
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