Patent ID: 7882905
Filing Date: 2011-02-08
Classification: E21B

Abstract:
1. A drilling system for enlarging a borehole in a subterranean formation, comprising: an expandable reamer comprising a tubular body having a longitudinal axis and a drilling fluid flow path therethrough, a plurality of generally radially and longitudinally extending blades carried by the tubular body, and cutting structure carried by at least one blade of the plurality of blades, wherein at least one blade of the plurality of blades is movable outwardly with respect to the longitudinal axis; and an expandable stabilizer axially above the expandable reamer and comprising a tubular body having a longitudinal axis and a drilling fluid flow path therethrough, a plurality of generally radially and longitudinally extending bearing pads carried by the tubular body, wherein at least one bearing pad of the plurality of bearing pads includes up-hole cutting structure positioned on an up-hole portion of the at least one bearing pad and a bearing surface extending from the up-hole cutting structure to a down-hole portion of the at least one bearing pad, the up-hole cutting structure being movable outwardly with respect to the longitudinal axis.