Patent ID: 7546872

Claim:
A liner hanger for securing to the inner wall of a wellbore casing and having an initial run-in position and a set position, the liner hanger comprising: a mandrel having an inner wall surface defining a bore and an outer wall surface, the outer wall surface having at least one slip pocket, a plurality of spring slots, each spring slot having at least one spring disposed therein, and a piston housing, the piston housing having at least one piston disposed therein, wherein the piston is in fluid communication with the bore; a slip housing disposed below the piston housing and each of the spring slots, the slip housing being slidingly engaged with the outer wall surface of the mandrel and having at least one slip operatively associated therewith, each of the at least one slips being disposed within a corresponding slip pocket; and a retainer, wherein the slip housing is held in the run-in position by the retainer so that each of the slips is disposed within each of the corresponding slip pockets, and wherein actuation of the piston causes the retainer to release the slip housing allowing each of the plurality of springs to move the slip housing upward axially from the run-in position to the set position which causes each of the slips to move upward axially and radially relative to the corresponding slip pockets and the mandrel to engage the inner wall of the wellbore casing.