IMPREGNATED DRILL BITS WITH INTEGRATED REAMERS

摘要

Drilling tools include a bit crown and an integrated reamer. The bit crown and integrated reamer can be configured with approximately equal drilling lives. The bit crown can be impregnated with abrasive cutting media and include one or more external flutes. The integrated reamer can be positioned at the base the bit crown and include one or more channels that align with one or more of the outer flutes. The channels can taper such that they increase in width as they extend away from the bit crown.

主权项

1. A drilling tool comprising:
a unitary shank having a first end and an opposing second end, wherein the second end of the unitary shank has a top surface substantially transverse to a longitudinal axis of the unitary shank and an exterior surface defining a torodial cavity that extends to and adjoins a portion of the top surface; a connector on the first end of the shank that is configured for securing the shank to a drill string component; a bit crown secured to and extending outwardly away from the top surface of the second end of the shank, wherein the bit crown is configured to have a desired drilling life; and a reamer integrally coupled to the bit crown such that a top portion of the reamer is integrally coupled to the bit crown, wherein the reamer is secured therein the torodial cavity of the shank, and wherein the reamer is configured to have substantially the same desired drilling life as the bit crown.