Importance

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Abstract

The casing suspension system includes a hanger having a load transfer mechanism and a finding/latching mechanism for finding, latching, and transferring load to an outer casing. The load transfer mechanism includes a ring disposed within a reduced diameter portion around the hanger. The ring includes a plurality of load bearing elements extending downwardly with the load bearing elements having a plurality of external teeth. The load bearing elements include an upwardly facing convex annular shoulder which engages a mating downwardly facing concave annular shoulder on the hanger. A spring retainer is disposed around the lower end of the load bearing elements to bias the load bearing elements inwardly. The hanger also includes a spring tube disposed below the load transfer ring. The spring tube includes a plurality of integral gates having keys. As the hanger is lowered into the well, the spring retainer maintains the load bearing elements in the 'in' position. Once the keys on the spring tube engage a profile in the outer casing, the load transfer ring moves downwardly with respect to the spring tube causing the spring tube to wedge the load bearing elements in the 'out' position into engagement with the outer casing.

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First Claim