Pakningssammenstilling

Seal assembly (10) to prevent fluid flow in at least one direction in a tool annulus between the seal assembly (10) and a casing pipe (2), where the seal assembly (10) comprises: a tool mandrel (11) with a through bore (13), a double conical, elastic seal element (12) arranged around the tool mandrel (11), extending in the longitudinal direction of the tool mandrel (11) from a first end (12.1) to a second, axially movable end (12.2), where the seal element's (12) first end (12.1) is fixed in a ring bracket (18) to the tool mandrel (11), while the second, axially movable end (12.2) of the seal element (12) is arranged to slide along the tool mandrel (11) between a first stop flange (11.1) and a second position or stop flange (11.2) on the tool mandrel (11), the double conical seal element (12) having a largest outer diameter (15) between the first (12.1) and the second end (12.2), forming a seal annular cavity (16) between the seal element and the tool mandrel, wherein the seal element (12) is compressible in towards the seal annular cavity (16) and the mandrel (11) through the second end (12.2) sliding away from the first end (12.1) along the tool mandrel (11), when the seal element (12) is pushed into a restriction (1) in the casing pipe (2).