Patent ID: 9303476
Filing Date: 2016-04-05
CPC Classification: E21B

Claim Text:
1. A downhole activation system within a tubular, the system comprising: an axially movable mover; a first magnet attached to the mover, the first magnet axially movable with the mover, said first magnet tubular shaped and axially polarized; a second magnet separated from the first magnet, the second magnet magnetically repulsed by the first magnet, further the second magnet tubular shaped and axially polarized; and, a biasing device urging the second magnet towards the first magnet, wherein the biasing device is a power spring, further wherein movement of the first magnet via the mover towards the second magnet moves the second magnet in a direction against the biasing device; and a third magnet magnetically attracted to the second magnet, the power spring interposed between the second and third magnets, the third magnet tubular shaped and axially polarized.