Patent ID: 6695050
Filing Date: 2004-02-24
Classification: E21B

Abstract:
A packer apparatus for use in a wellbore, the packer apparatus comprising:a packer mandrel; a packer element assembly disposed about the packer mandrel, wherein the packer element assembly has an upper end and a lower end; an upper retaining shoe disposed about the packer mandrel above the upper end of the packer element assembly for axially retaining the packer element assembly; and a lower retaining shoe disposed about the packer mandrel below the lower end of the packer element assembly for axially retaining the packer element assembly; wherein at least one of the upper retainer shoe and lower retaining shoe comprises: an expandable inner shoe disposed about the packer mandrel; an expandable outer shoe disposed about the inner shoe; and an inner wedge disposed about the packer mandrel and positioned in the inner shoe for engaging the corresponding one of the upper end or lower end of the packer element assembly.