Patent ID: 7434617

Claim:
A cup tool for providing a high-pressure fluid seal in an annulus between a high-pressure mandrel and a production casing or a production tubing in a wellbore, comprising: a cup tool tube having a threaded upper end for connection to the high-pressure mandrel; a three-part packoff assembly that slides over the cup tool tube from an unset position to a set position, the three-part pack off assembly including an elastomeric cup that surrounds the cup tool tube, a rigid alignment ring that surrounds the cup tool tube above a top end of the elastomeric cup, an inner periphery of the rigid alignment ring comprising an annular groove that accommodates an O-ring for providing a seal between the cup tool tube and the rigid alignment ring, and an elastomeric packoff element that surrounds the cup tool tube above a top end of the rigid alignment ring.