Multi-stage Locking System for Selective Release of a Potential Energy Force to Set a Subterranean Tool

摘要

An actuation tool uses a lock that when released allows a moving magnet to move into position to repel another magnet. Alternatively a magnetic field can be triggered in a stationary magnet such as one delivered on wireline, for example, to accomplish tool actuation. The repelling force on the second magnet moves it away from a locking position to allow another lock to retract and release the stored potential energy, where the release of the potential energy creates kinetic energy to drive an actuation assembly to set the tool. In a preferred application the 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 supporting dogs that retain the potential energy whose movement can set the tool.

主权项

1. An actuation assembly for a subterranean tool, comprising:
a mandrel supporting a final controlled element; a first potential energy source associated with said mandrel; a first detent assembly to selectively isolate said potential energy source from said final controlled element; a second detent assembly selectively operable independently of said first potential energy source, said second detent assembly, when selectively defeated, defeats said first detent assembly to allow said first potential energy source to move said final controlled element.