| 摘要 |
An apparatus and method for supporting and sealing a string of casing in a well utilizes the weight of the casing to form the seal. A tubular housing locates at the surface of the well. A seal sleeve is placed on a landing shoulder in the bore of the housing. A suspension mandrel connects to the upper end of the string of casing. The mandrel has an external tapered surface that engages an internal tapered surface and a seal sleeve. This creates a wedging action which moves the seal sleeve radially outward to seal against the bore of the housing. The weight of the string of casing pulls the mandrel down in the seal sleeve to cause this wedging action.
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