Cutter elements for hollow drill bit

Details Cutter elements for hollow drill bit Cutter elements for hollow drill bit

1989-06-30

1990-04-10

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Core forming type

175394, 175410, E21B 1002, E21B 1044

Patent

active

049151827

ABSTRACT:
A hollow drill bit is formed of an axially extending tubularly-shaped support member (1) with cutter elements (2) inserted into the leading end (1a) of the support member. Each cutter member (2) has a radially outer surface (2a) and a radially inner surface (2b) with channels (2c, 2d) in each surface inclined relative to the axis of the support member (1). The channels (2c,2d) carry a flowable cooling agent to the leading end of the drill bit, and remove drillings produced by the bit from the leading end.

REFERENCES:
patent: 817296 (1906-04-01), Besson
patent: 1168226 (1916-01-01), Rand
patent: 1172139 (1916-02-01), Jenkins
patent: 1846177 (1932-02-01), Bascom et al.
patent: 2520876 (1950-08-01), Bullock
patent: 3217816 (1965-11-01), Boyer

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