Patent ID: 9561550
Date: 2017-02-07
CPC Classifications: B23B,Y10S,Y10T

Claim:
1. A drilling tool comprising: a cutting head having a body comprising an outer surface with bearing surfaces positioned on opposing sides of the body, and a duct formed from an opening in the outer surface and exiting through a rear of the body; and a replaceable insert affixed to the body by a temporary fastening system, the replaceable insert comprising two cutting edges, each cutting edge extending from a rotational axis to the outside diameter of the insert in opposing manners for double effective cutting, wherein the bearing surfaces are in spaced relationship to the replaceable insert and the bearing areas and replaceable insert guide the drilling head, wherein at least one channel is formed along opposing sides of the outer surface of the body configured to direct high pressure fluid toward each of the two cutting edges of the insert, and the fluid and chips formed by the replaceable insert exiting through the duct with the opening having portions adjacent each cutting edge positioned to receive drilling fluid from each of the two cutting edges, and wherein the cutting head is coupled to a single or double tube shank configured to accept the high pressure fluid and chips formed by the replaceable insert exiting through the duct.