Patent ID: 7832474
Filing Date: 2010-11-16
Classification: E21B

Abstract:
1. A system for disconnecting a first element from a second element at a desired position in a wellbore, the system comprising: a disconnect tool containing an expandable material, the disconnect tool being actuatable from a locked position, wherein the first and the second elements are interconnected, to an unlocked position, wherein the first and the second element are disconnected, upon a determined expansion of the expandable material in response to the ambient temperature at the desired position in the wellbore; a first portion connected to the first element, the first portion having an internal chamber containing the expandable material and a neck forming an opening into the internal chamber; a second portion connected to the second element, the second portion having a cavity receiving the neck when the tool is in the locked position; and a locking mechanism releasably holding the first portion and the second portion in the locked position.