Earth boring cutting element enhanced retention system

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

1978-08-17

1979-12-04

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175410, E21B 908

Patent

active

041767250

ABSTRACT:
An earth boring apparatus includes individual cutting elements positioned within corresponding individual sockets in the cutter member body of the earth boring apparatus. Each socket has a socket wall and bottom. Each cutting element has a lower body portion positioned in the socket with a surface that contacts the socket wall and a bottom surface. The bottom surface has a conical taper. This causes compressive loads to press the lower body portion against the socket wall enhancing retention and reducing cutting element loss.

REFERENCES:
patent: 3357507 (1967-12-01), Stewart
patent: 3389761 (1968-06-01), Ott
patent: 3461983 (1969-08-01), Hudson et al.
patent: 3513728 (1970-05-01), Hudson et al.
patent: 3599737 (1971-08-01), Fischer
patent: 4047583 (1977-09-01), Dyer

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