Drilling assemblies including expandable reamers and expandable stabilizers, and related methods

A drilling assembly for drilling a subterranean wellbore, comprising:

• an expandable reamer comprising a first tubular body having a first longitudinal axis and a first drilling fluid flow path extending therethrough, a plurality of blades carried by the first tubular body, and a cutting structure carried by at least one blade of the plurality of blades, wherein the at least one blade is outwardly movable from a retracted position to an extended position with respect to the first longitudinal axis, the expandable reamer further comprising a first actuation device for moving the at least one blade from the retracted position to the extended position and a first electrical device configured to receive a first electronic signal and actuate the first actuation device responsive to the first electronic signal, wherein the first electrical device comprises a first processor;
• and
• an expandable stabilizer axially spaced from the expandable reamer and comprising a second tubular body having a second longitudinal axis and a second drilling fluid flow path extending therethrough, a plurality of bearing pads carried by the second tubular body, wherein at least one bearing pad of the plurality of bearing pads is outwardly movable from a retracted position to an extended position with respect to the second longitudinal axis, the expandable stabilizer further comprising a second actuation device for moving the at least one bearing pad from the retracted position to the extended position and a second electrical device configured to receive a second electronic signal and actuate the second actuation device responsive to the second electronic signal, wherein the second electrical device comprises a second processor.

A method of forming a drilling assembly for drilling a subterranean wellbore, comprising:

• coupling an expandable stabilizer to an expandable reamer, the expandable reamer comprising a first tubular body having a first longitudinal axis and a first drilling fluid flow path extending therethrough, a plurality of blades carried by the first tubular body, and a cutting structure carried by at least one blade of the plurality of blades, wherein the at least one blade is outwardly movable from a retracted position to an extended position with respect to the first longitudinal axis for reaming a section of the wellbore responsive to a first electronic signal received by a first electrical device located in the first tubular body, the first electrical device comprising a first processor, the expandable stabilizer comprising a second tubular body having a second longitudinal axis and a second drilling fluid flow path extending therethrough, a plurality of bearing pads carried by the second tubular body, wherein at least one bearing pad of the plurality of bearing pads is outwardly movable from a retracted position to an extended position with respect to the second longitudinal axis responsive to a second electronic signal received by a second electrical device located in the second tubular body, the second electrical device comprising a second processor;
• and
• axially locating the expandable stabilizer a distance of about 25 feet or less above the blades of the expandable reamer.