Synchronic Dual Packer

摘要

A downhole tool having a first packing element and a second packing element configured to synchronically set to selectively hydraulically isolate a portion of the wellbore. The movement of a pin along a j-slot track on a second sleeve sets the second packer in compression and the movement of a pin along a j-slot track on a first sleeve the first packer in tension after the second packer has been set. The j-slot track on the first sleeve has six different pin positions and the j-slot track on the second sleeve has four different pin positions. The pin positions and direction of travel of the j-slot tracks are adapted to permit the synchronized setting of the two packing elements to hydraulically isolate a portion of the wellbore. The wellbore may then be treated by flowing fluid out of a ported sub positioned between the packing elements.

主权项

1. A dual packer comprising:
a first packing element; a first sleeve having a first j-slot track, wherein movement of a first pin along the first j-slot track actuates the first packing element between a set position and a running position; a second packing element; and a second sleeve having a second j-slot track, wherein movement of a second pin along the second j-slot track actuates the second packing element between a set position and a running position.