Earth boring cutting element retention system

Details Earth boring cutting element retention system Earth boring cutting element retention system

1976-06-01

1977-09-13

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175374, 403334, E21C 1300

Patent

active

040475832

ABSTRACT:
An earth boring apparatus includes individual cutting elements positioned within corresponding individual sockets in the cutter member body of the apparatus. Each socket has a socket wall and each cutting element has a lower body portion with a surface that contacts the socket wall. In one embodiment the sockets are cylindrical and a substantial portion of the lower body surfaces have a conical taper. This provides an improved fit of the lower body surface along the length of the socket wall and reduces cutting element loss.

REFERENCES:
patent: 2097030 (1937-10-01), Killgore
patent: 2121202 (1938-06-01), Killgore
patent: 3311181 (1967-03-01), Fowler
patent: 3717209 (1973-02-01), Sheldon et al.
patent: 3807804 (1974-04-01), Kniff
patent: 3852874 (1974-12-01), Pearson
patent: 3858671 (1975-01-01), Kita

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