Patent ID: 7708061

Claim:
A cup tool for providing a high-pressure fluid-tight seal in an annular gap between the cup tool and a casing or a tubing in a cased wellbore, the cup tool comprising: a cup tool tube having a threaded upper end for connection to a high-pressure mandrel, the cup tool tube having an outer surface over which a two-part elastomeric cup is slidably mounted for reciprocal movement from an unset position for entry of the cup tool into the casing or tubing to a set position in which the annular gap is obstructed by a top part of the two-part elastomeric cup to contain fluid pressure below the two-part elastomeric cup, the outer surface of the cup tool tube having a lower region of a first diameter and an upper region with a second, larger diameter and a tapered region between the upper region and the lower region; and the two-part elastomeric cup including a bottom part having a lip seal that rides against the outer surface of the cup tool tube, and seals against the tapered region of the cup tool tube to provide a high pressure seal between the cup tool tube and the bottom part of the two-part elastomeric cup when the two-part elastomeric cup is in the set position.