Patent ID: 8074741

Claim:
A reamer bit comprising: a generally tubular body extending between a first end and a second end, the generally tubular body configured for attachment to a drill string; and a plurality of cutting elements disposed on one or more blades carried by the generally tubular body between the first end and the second end thereof, the cutting elements of the plurality defining a cutting profile spaced radially apart from a longitudinal axis of the reamer bit and longitudinally apart from the first end and the second end of the generally tubular body when the one or more blades are in an operable position; wherein at least one cutting element of the plurality has an effective back rake angle of about fifteen degrees (15°) or more, wherein at least one cutting element of the plurality has a side rake angle of about five degrees (5°) or more, and wherein the plurality of cutting elements comprises all the cutting elements carried by the reamer bit between the first end and the second end.