| abstract |
A method and a device for in situ formation of a seal ( 17 ) in a region ( 2 ) of an annulus ( 18 ) located around a pipe structure ( 4 ) in a well ( 18 ), in which the method comprises the following steps: (A) to convey a perforation device into the pipe structure ( 4 ) to a location vis-a-vis said region ( 2 ) of the annulus ( 16 ); (B) by means of the perforation device, to make at least one hole ( 13 ) through the pipe wall of the pipe structure ( 4 ) at said annulus region ( 2 ); (C) to force a liquid sealing material, which is capable of entering into solid state, through said hole ( 13 ) and further into the annulus region ( 2 ) for the filling thereof, where-upon the sealing material enters into solid state and forms said seal ( 17 ). The distinctive characteristic of the method is that step (C) thereof also comprises:—to choose a fusible, solid-state packer material ( 5 ) as raw material for said seal material;—to heat and melt at least a part of the solid-state packer material ( 5 ); and—subsequently, to force liquid packer material ( 5 ) into the annulus region ( 2 ) via the at least one hole ( 13 ) through said pipe wall, whereupon the liquid packer material ( 5 ) enters into solid state and forms said seal ( 17 ) in the annulus region ( 2 ). |