US 9,428,977 B2 · Multi-stage locking system for selective release of a potential energy force to set a subterranean tool

Abstract

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.

Claims20

Dependent claims

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 and said first detent assembly, said second detent assembly when selectively defeated by a first mechanical movement, thereafter, defeats said first detent assembly by a second mechanical movement to allow said first potential energy source to move said final controlled element.

1 more element

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;
said first detent assembly comprises an actuating member connected to said final controlled element, said actuating member located between said first potential energy source and at least one dog, said dog having a radially extended position that prevents movement of said actuating member by said first potential energy source;
said dog is retained in said radially extended position by said second detent assembly.

3 more elements

Dependencies are inferred from the claim text.

Multi-stage locking system for selective release of a potential energy force to set a subterranean tool

Life of this patent

Multi-stage locking system for selective release of a potential energy force to set a subterranean tool

Life of this patent

Abstract

Claims20