BLADE-MOUNTED SENSOR APPARATUS, SYSTEMS, AND METHODS

In some embodiments, an apparatus and a system may include a tubular member; at least two interchangeable blades attached to the tubular member, the blades extendible radially outward to an extended position and retractable radially inward to a retracted position, wherein an outer surface of the blades is disposed at or below an outer surface of the tubular member when the blades are in the retracted position; and a plurality of sensors attached to the blades, the sensors to engage a circumferential portion of a borehole wall along the outer surface of the blades in an azimuthal direction when the blades are disposed downhole in the extended position, and to refrain from engaging the borehole wall when the blades are disposed downhole in the retracted position. Additional apparatus and systems, as well as methods, are disclosed.