Seal assembly for pipeline isolation tool and methods of use

A pipeline plug comprising:

• a plug body, the plug body being tubular;
• an actuation mechanism, the actuation mechanism including a fixed head and a movable head, the fixed head coupled to the plug body;
• and
• a seal assembly positioned about the plug body between the fixed head and the movable head, the seal assembly including:
• a pressure head, the pressure head including a forcing face;
• a primary tapered ring adapted for radial expansion during a setting operation of the seal assembly, the primary tapered ring including an expansion face, the expansion face abutting the forcing face,
• a primary seal ring;
• a squeezer assembly, the squeezer assembly including a seal face, the seal face abutting the primary seal ring;
• a secondary tapered ring, the secondary tapered ring including a wedge squeezer face, the wedge squeezer face abutting a wedge face of the squeezer assembly;
• and
• a bowl, the bowl including a wedge face, the wedge face in abutment with an expansion face of the secondary tapered ring.