Cutting structure for single roller cone drill bit

摘要

A roller cone drill bit is disclosed which includes a bit body adapted to be coupled to a drill string. A bearing journal depends from the bit body. A single roller cone is rotatably attached to the bearing journal. The roller cone is formed from steel and includes a plurality of cutting elements disposed at selected positions about the cone. At least one of the cutting elements has an extending body which has a first end coupled to the roller cone and a distal end extending away from the cone. The extending body is formed from steel. A super hard element is coupled to the distal end of the extending body to form a super hard cutting face for the cutting element.