tool can be a liner hanger the release device can be a selectively energized electromagnet or a solenoid that shifts at least one magnet into alignment with at least one second magnet so as to defeat the second magnet from effectively storing the potential energy that can set the tool when the lock is defeated application_number US 201113048075 A description fig1 4 are best understood in conjunction with fig5 7 fig5 7 illustrate an example of an application of the actuation system in the form of a liner hanger 10 that has in one embodiment a ring of segments 12 that axially translate with respect to each other to increase in diameter as better seen in fig1 and 11 the drawings are schematic and are intended to illustrate that the slips 12 in whatever way they are assembled are axially translated in tandem or relative to each other depending on the design by the force of spring 14 acting on setting sleeve 16 to push it in the direction of arrow 18 one or more lock segments 20 are initially disposed in matching grooves 22 to prevent motion in the direction of arrow 18 by the setting sleeve 16 lower magnet ring 24 and upper magnet ring 26 are retained by snap ring 28 against shoulder 30 in a position where magnets 32 attract the lock segments 20 such that segments 20 are partly into groove 22 and partly into a recess 34 in the.