Patent ID: 8657038

Claim:
An expandable reamer apparatus for enlarging a borehole in a subterranean formation, comprising: an expandable reamer comprising: a tubular body having a longitudinal axis, an upper end having a threaded connection, a lower end having a threaded connection, an inner bore, an outer surface, and at least one track sloped upwardly and outwardly to the longitudinal axis; a drilling fluid flow path extending through the inner bore; and at least one blade having at least one cutting element configured to remove material from the subterranean formation during reaming, at least one blade slidably coupled to the at least one track of the tubular body; and a stabilizer sub having at least one stabilizer rib thereon, the stabilizer sub positioned in a downhole direction from the tubular hod and directly attached to the threaded connection in the lower end of the tubular body of the expandable reamer such that the stabilizer sub shares a common border and is in contact with the tubular body of the expandable reamer without any other subs between the stabilizer sub and the tubular body.