Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1995-10-13
1996-12-24
Dang, Hoang C.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175 40, 175371, 384 95, E21B 1022
Patent
active
055866115
ABSTRACT:
A rotary cutter cone type drill bit having a body structure with a plurality of depending cutter support lugs each having a spindle integral therewith and defining a cylindrical bushing support surface and a spindle head. A cutter cone is positioned for rotation about each of the spindles and is supported for rotation and axial retention by a dual split bushing arrangement. The dual split bushing arrangement has an inner split bushing received in immovable relation about the cylindrical bushing support surface of the spindle and outer split bushing being received in rotatable bearing relation about a portion of the inner split bushing and functioning to retain the inner split bushing about the cylindrical bushing support surface. The inner split bushing also retains the outer split bushing so that the cutter cone is maintained in assembly with the spindle. The outer split bushing is secured in immovable relation within the cutter cone by a lock element or by threaded connection. The split bushings are machined, hardened and are then split by a guillotine type splitter.
REFERENCES:
patent: Re28625 (1975-11-01), Cunningham
patent: 1636663 (1927-07-01), Reed
patent: 1692793 (1928-11-01), Reed
patent: 2595903 (1952-05-01), Swart
patent: 2595904 (1952-05-01), Swart
patent: 3866987 (1975-02-01), Garner
patent: 3995917 (1976-12-01), Quinlan
patent: 4145094 (1979-03-01), Vezirian
patent: 4157122 (1979-06-01), Morris
patent: 4181377 (1980-01-01), Oelke
patent: 4249781 (1981-02-01), Olschewski et al.
patent: 4260203 (1981-04-01), Garner
patent: 4478299 (1984-10-01), Dorosz
patent: 4572306 (1986-02-01), Dorosz
patent: 4756631 (1988-07-01), Jones
patent: 4802539 (1989-02-01), Hall et al.
patent: 4874047 (1989-10-01), Hixon
patent: 4875532 (1989-11-01), Langford, Jr.
patent: 5040624 (1991-08-01), Schumacher et al.
patent: 5080183 (1992-01-01), Schumacher et al.
patent: 5402858 (1995-04-01), Quantz et al.
Cypress Services, Inc.
Dang Hoang C.
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