Patent ID: 7617868

Claim:
A hanger assembly for securing a string of expandable casing to an upper casing, the hanger assembly comprising: a radially expandable housing for securing to an upper end of the expandable casing and locating within a lower portion of the upper casing; an annular radially expandable seal on the housing; and at least one lengthwise expandable slip disposed around a circumference of a circularly-shaped portion of the housing, at least one of the at least one lengthwise expandable slips comprising an elongated strip having a run-in position comprising a wave-shape with a peak and two valleys disposed on either side of the peak, the expandable housing being radially expandable from the run-in position to a partially expanded position, wherein the peak contacts an inner wall of the upper casing to anchor the expandable casing, and the seal is still spaced from the inner wall of the upper casing to provide a flow path, and the expandable housing being further expandable from the partially expanded position to a set position, wherein the peak bites into the inner wall of the upper casing causing at least one of the at least one lengthwise expandable slips to become compressed and the seal to seal against the upper casing.