Rotary drag bit including a central region having a plurality of cutting structures, method of manufacture thereof, and displacement for manufacture thereof

摘要

A rotary drag bit including an inverted cone geometry proximate the longitudinal axis thereof is disclosed. The inverted cone region may include a central region, the central region including a plurality of cutting structures affixed thereto and arranged along at least one spiral path. The at least one spiral path may encircle its center of revolution at least once within the inverted cone region. A cone region displacement and a method for manufacturing a rotary drag bit therewith are disclosed. At least one groove may be formed within the cone region displacement along a respective at least one spiral path, the spiral path encircling its center of revolution at least once. A plurality of cutting structures may be placed within the at least one groove and the cone region displacement may be placed within a mold for filling with an infiltratable powder and infiltrating with a hardenable infiltrant.