Rotary abrasive drilling bit

Details Rotary abrasive drilling bit Rotary abrasive drilling bit

1977-12-20

1980-02-26

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175330, 175379, 175412, E21B 916

Patent

active

041901266

ABSTRACT:
A rotary abrasive drilling bit disclosed herein is of a construction wherein teeth are equipped on the fore part of a bit body attached to a rotary drill pipe, each of said teeth is composed of a plurality of chips which are made of cemented tungstencarbide and the matrix thereof which is soft and inferior in abrasion resistance relative to said cutting elements or chips, each chip is shaped like a thin stick and extends along the cutting direction of said bit body, the matrix surrounds said chips, and in the matrix of each tooth the chips are orderly arranged to leave a desired interspace along the direction of radius as well as the direction of circumference of the bit body.

REFERENCES:
patent: 2147843 (1939-02-01), Jamar et al.
patent: 2234273 (1941-03-01), Pennington
patent: 3106973 (1963-10-01), Christensen
patent: 3546150 (1970-10-01), Stebley
patent: 3726351 (1973-04-01), Williams, Jr.
patent: 3999962 (1976-12-01), Drui et al.
patent: 4042347 (1977-08-01), Sioui

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