Method for renewing the cutting face of a diamond drill bit

Details Method for renewing the cutting face of a diamond drill bit Method for renewing the cutting face of a diamond drill bit

1985-12-02

1987-04-07

Meister, James M.

Metal working

Method of mechanical manufacture

Repairing

294262, 294265, 76101A, 76108A, 175315, 408 1BD, B23P 700, E21C 1300

Patent

active

046549480

ABSTRACT:
A drill bit has a formation engaging face through which a plurality of counterbores are formed. A stud assembly having a polycrystalline diamond face thereon is forced into the counterbore in a close tolerance relationship therewith thereby providing frictional forces which prevent movement of the stud assembly respective to the drill bit. A passageway leads from the bottom of the counterbore back to a wall surface of the bit and emerges in spaced relationship respective to the entrance of the counterbore. Hydraulic pressure is effected within the passageway, thereby moving the stud assembly with a piston-like action. The stud assembly is next rotated to bring a new cutting face into cutting position. A tool, made in accordance with the present invention, forces the stud assembly back into the counterbore.

REFERENCES:
patent: 2348293 (1944-05-01), Hamer
patent: 2429967 (1947-10-01), Sorensen
patent: 2439692 (1948-04-01), McKay
patent: 2557619 (1951-06-01), Swart
patent: 2901222 (1959-08-01), Pease, Jr.
patent: 2958119 (1960-11-01), Stansfield et al.
patent: 3075593 (1963-01-01), Holsing
patent: 3537539 (1970-11-01), Adcock
patent: 3858671 (1975-01-01), Kita
patent: 4200159 (1980-04-01), Peschel et al.
patent: 4553615 (1985-11-01), Grainger

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