Revolving cutters for rock bits

Details Revolving cutters for rock bits Revolving cutters for rock bits

1987-04-15

1988-06-21

Suchfield, George A.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175336, 175350, 175355, 175373, E21B 1008, E21B 1012, E21B 1050

Patent

active

047519720

ABSTRACT:
A mechanism is disclosed for rock bits whereby cutting elements, rotatably mounted to fixtures with journals, are constantly forced to rotate or precess by the interaction of the earth formation and the cutter. The cutters are fixed in skewed or offset positions on a cutting face of a rotary drill bit head. These cutting elements act as drag or shear cutters when they are operated in an earth formation.

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patent: 4323130 (1982-04-01), Dennis
patent: 4545441 (1985-10-01), Williamson
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patent: 4610317 (1986-09-01), England et al.

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