Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1972-07-24
1976-09-28
Brown, David H.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175351, 175371, E21b 914, E21c 1301
Patent
active
039825957
ABSTRACT:
A cutter with replaceable cutting elements is adapted to be mounted upon the rotary head of an earth boring machine or upon the body of an earth boring bit. The cutter is used in conjunction with an earth boring machine that functions to form circular kerfs in the formation being bored to fracture rock between a proximate pair of kerfs in a manner to cause fragments of the formation to be separated from the formation being bored. At least one annular cutting ring is mounted on the periphery of the cutter body for contacting the formations and forming a kerf therein. The cutting ring is in the form of a pair of substantially semicircular disk elements that fit upon the periphery of the cutter body. A corresponding pair of semicircular locking elements with taper surfaces are positioned in overlapping relation to the disk elements. The locking elements are securely bolted to the cutter body and insure that the disk elements remain in the proper position for the earth boring operation. A pair of stops project from the cutter body and contact the ends of the semicircular disk elements thereby preventing the disk elements from rotating relative to the cutter body.
REFERENCES:
patent: 1143275 (1915-06-01), Hughes
patent: 1673285 (1928-06-01), Holdaway et al.
patent: 1705055 (1929-03-01), Allison
patent: 3204710 (1965-09-01), Bechem
patent: 3216513 (1965-11-01), Robbins et al.
patent: 3572452 (1971-03-01), Winberg
patent: 3596724 (1971-08-01), Bechen
patent: 3604523 (1971-09-01), Lichte
Brown David H.
Dresser Industries Inc.
Scott Eddie E.
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