Patent ID: 8336635
Filing Date: 2012-12-25
Classification: E21B

Abstract:
1. A downhole apparatus for use in a well bore, the apparatus comprising: a center mandrel; slip means disposed on the center mandrel for grippingly engaging an inner surface of the well bore when in a set position; a retractable packer cup disposed on the center mandrel for selectively sealing an annulus between the center mandrel and the well bore, the retractable packer cup being releasably coupled to the center mandrel, the retractable packer cup is slidable relative to the center mandrel when released so as to permit the expansion of an elastomeric lip portion to sealingly engage the well bore; and an o-ring that extends around the center mandrel for preventing the flow of fluid between the center mandrel and the retractable packer cup; wherein the retractable packer cup seals the annulus prior to setting the slip means in the set position for engaging the well bore.