REAMING TOOL SUITABLE FOR RUNNING ON CASING OR LINER AND METHOD OF REAMING

摘要

The method of drilling out a reaming tool (10) configured as a shoe having a nose (14) at an axially leading edge thereof and a side wall (16) extending axially to the rear thereof comprises initially engaging an interior surface of the nose (14) proximate a central portion thereof with a drill bit bearing PDC cutting elements to center the drill bit within the nose (14); rotating the drill bit inside the reaming tool (10); and drilling out the nose (14) from the central portion thereof radially outwardly toward a peripheral portion thereof while avoiding contact by the PDC cutting elements of the drill bit with any cutting structure on the reaming tool (10).