Inserts having two components anchored together at a non-perpend

Details Inserts having two components anchored together at a non-perpend Inserts having two components anchored together at a non-perpend

1983-01-20

1985-07-16

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175329, 407118, E21B 1046

Patent

active

045290482

ABSTRACT:
An insert for a rotary type drag bit having two anchored components, an engaging element and a shank, is disclosed. The components are positioned into each other in interfitting relationship with the mating surfaces of the two components being at a non-perpendicular angle to a plane parallel to the front of the engaging element. This insert can then be placed into a receiving feature on the crown of a drill bit. The resulting engaging element to shank interface enables the forces encountered during drilling to be distributed over a larger surface area than conventional flat-on-flat two component attachments so that the bond is less likely to break. The effect of the drilling forces on the engaging element to shank interface is also reduced as the shearing forces are diminished and resolved into compressive forces and the shank provides a support for the interface bond against any remaining shearing forces.

REFERENCES:
patent: 3751114 (1973-08-01), Davis
patent: 4109737 (1978-08-01), Bovenkerk
patent: 4200159 (1980-04-01), Peschel et al.
patent: 4265324 (1981-05-01), Morris et al.
patent: 4333540 (1982-06-01), Daniels et al.
patent: 4334585 (1982-06-01), Upton
patent: 4382477 (1983-05-01), Barr

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