Patent ID: 6918441
Filing Date: 2005-07-19
Classification: E21B

Abstract:
1. A cup tool for providing a high-pressure fluid seal in an annulus between a high pressure mandrel and a 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 stepped shoulder at an upper end of the cup tool tube, the stepped shoulder including at least two substantially right-angled steps; and an elastomeric sealing element that is slidably received on the cup tool tube, the elastomeric sealing element having a top end with a square top edge that engages the stepped shoulder when the elastomeric sealing element is forced upwardly over the cup tool tube by fluid pressure; whereby the top end of the elastomeric sealing element is adapted to be forced upwardly and over one or more of the right-angled steps when the elastomeric sealing element is exposed to elevated fluid pressures, thereby extruding into the annulus in order to provide the high-pressure fluid seal.