Raise drill bit inboard cutter assembly

Details Raise drill bit inboard cutter assembly Raise drill bit inboard cutter assembly

1980-12-10

1982-11-16

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175 53, 175365, 175366, E21B 1020

Patent

active

043591140

ABSTRACT:
A raise bit (10) is constructed with a plurality of housings (30) secured to cutter carrier frame (14) and disposed about drive stem (12). Housings (30) include a rectangularly-shaped mounting box (48) for rotatably supporting an outboard roller cutter (28). Each housing (30) also includes an upright wall (34) having an upwardly tapered lug (40) extending along the upper edge portion thereof for seating within a correspondingly shaped groove (82) formed along the underside of shoulder section (78) of an L-shaped hanger bracket (68). A roller shell (72) is antifrictionally mounted on a spindle (70) extending outwardly from an upright section (76) of hanger bracket (68). Bracket (68) is held in hooked relationship over lug (40) by a pair of capscrews (74) extending downwardly through clearance holes formed in upright section (76) and engaging within a lower portion of upright wall (34).

REFERENCES:
patent: 1636665 (1927-07-01), Reed
patent: 2065743 (1936-12-01), Reed
patent: 2166664 (1939-07-01), Mead
patent: 3675729 (1972-07-01), Neilson
patent: 3917009 (1975-11-01), Dyer et al.
patent: 4004644 (1977-01-01), Liljekvist
patent: 4010808 (1977-03-01), Youngblood
patent: 4042047 (1977-08-01), Dively et al.
patent: 4108259 (1978-08-01), Dixon et al.
patent: 4177866 (1979-12-01), Mitchell

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