Atlas Copco Secoroc LLC

Jeffery T Ross

Kenneth Martin Curry

Mark L Jones

Kyle E Johnson

A drill bit assembly for boring including a drill bit and a bit sub. A front bit end has a plurality cutting elements at a forward face of the front bit end and a first fluid return passage extending through the drill bit to a rear bit end. The bit sub couples to the rear bit end. The bit sub includes a bore disposed at a front sub end sized and shaped to receive the rear bit end of the drill bit. A plurality of legs extends from a mid-sub region toward the front sub end between pairs of cutting elements. The plurality of legs has a fluid delivery passage disposed therein with the fluid delivery passage extending from the plurality of legs to a rear sub bit end. The bit sub has a second fluid return passage connecting the first fluid return passage to the rear sub bit end.

Reverse circulation bit assembly

Embodiments of the present invention include a drill bit configured for boring holes or wells into the earth. Embodiments include a drill bit comprised of a plurality of blades. Each of the plurality of blades includes one or more holes therethrough configured to receive a cutter that is secured therein. The cutters are secured in the hole with a removable securing device that typically prevents the cutters from being removed when the drill bit is in use but allow the cutters to be removed from the holes when the drill bit is not in use.

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Salt Lake City, UT, United States of America

Jeffery T Ross