Patent ID: 7562710

Claim:
A method for forming a seal in situ in a region of an annulus located around a pipe structure in a well, the method comprising: (A) conveying a perforation device into the pipe structure to a location adjacent the region of the annulus; (B) making at least one hole through a pipe wall of the pipe structure at the annulus region using the perforation device; (C) heating and melting at least part of a fusible, solid-state packer material capable of entering into a solid state upon cooling, and then forcing melted, liquid packer material through the hole through the pipe wall and further into the annulus region and filling the annulus region, wherein the liquid packer material, upon cooling, enters into solid state and forms the seal, the method further comprising: using a packer injection module comprising at least one packer chamber containing the fusible packer material; a heating device; and a driving device and a propulsion device therefore; conveying the packer injection module into the pipe structure to the location adjacent the annulus region using a connection line; keeping at least part of the packer material in a melted, liquid state in the packer chamber using the heating device; connecting the packer chamber in a flow-communicating manner to the hole through the pipe wall; and forcing melted, liquid packer material out of the packer chamber and into the annulus region through the hole through the pipe wall using the driving device and the propulsion device, wherein the seal forms upon cooling.