Roller-reamer

Details Roller-reamer Roller-reamer

1984-02-16

1985-12-31

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175228, 175371, E21B 1030, E21B 1022

Patent

active

045615080

ABSTRACT:
A roller-reamer structure wherein for each roller shaft, the shaft is tightly, but releasably secured, both radial and thrust bearings being provided for relatively moving roller and shaft surfaces. The shaft is held in the various embodiments within accommodating slots by an interference fit between the shaft and the accommodating slot, by a partially slotted longitudinal opening that allows squeezing of a block about the shaft end, by a tapered shaft end being wedgedly held or by a slotted block opening and tapered wedging block member tightly securing the shaft. Some combinations include a sealed and protected self-lubricating reservoir.

REFERENCES:
patent: 2026323 (1935-12-01), Reed
patent: 2189031 (1940-02-01), Harrington
patent: 2695771 (1954-11-01), Salvatori et al.
patent: 3306381 (1967-02-01), Garrett et al.
patent: 4182425 (1980-01-01), Garrett
patent: 4226291 (1980-10-01), Spelts
patent: 4254839 (1981-03-01), Schpok et al.
patent: 4261426 (1981-04-01), Garrett
patent: 4262760 (1981-04-01), Allison et al.

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