Patent ID: 8887798

Claim:
A downhole stabilizer comprising: a tool body arranged and designed to couple with a downhole tool string, the tool body including an axial through bore and a mandrel; a first cone deployed about the mandrel, the first cone including a first cone recess, the first cone recess having a set of first cone splines disposed in at least one axial wall thereof; a second cone deployed about the mandrel, the second cone including a second cone recess, the second cone recess having, a set of second cone splines disposed in at least one axial wall thereof; and a stabilizer block deployed axially between the first and second cones and carried in the first and second cone recesses, the stabilizer block having at least two sets of stabilizer block splines disposed on a lateral face thereof, a first of the sets of stabilizer block splines arranged and designed to complement and engage the set of first cone splines and a second of the sets of stabilizer block splines arranged and designed to complement and engage the set of second cone splines; wherein the first cone, the second cone, and the stabilizer block are configured to rotate substantially freely with respect to the tool body, and wherein the sets of first cone splines, second cone splines, and stabilizer block splines are each angled with respect to a longitudinal axis of the tool body such that axial translation of the second cone with respect to the first cone either radially extends or retracts the stabilizer block.