INTERCHANGEABLE BEARING BLOCKS FOR DRILL BITS, AND DRILL BITS INCLUDING SAME

摘要

A bearing block (40) is provided that may be used with a drag bit body (10) or frame to limit depth of cut of cutters on a bit. The bearing block is designed so that it may be interchangeably replaced or repaired without necessitating alteration to a standardized bit frame. The interchangeable bearing block may be used to provide a target depth of cut (TDOC) and/or a selected contact or rubbing area (32) to support weight on bit and limit depth of cut (DOC) for improving drilling performance of a bit. The interchangeable bearing block brings manufacturing selectability by providing. a customizable product in terms of depth of cut selection and cutter penetration control for different formations, which is suitable for use with a common bit frame. A rotary drill bit assembly, a unitary cone insert bearing block for a drill bit, and a bit frame are also provided.