| 摘要 |
A subsea wellhead assembly includes a housing 12 with a bore 14 and a load shoulder 20. A hanger 10 is lowered into the housing 12, the hanger 10 having at least one downward facing load shoulder 40 and an expandable load ring 42 carried on the hanger 10. Landing the hanger on the housings load shoulder 20 energizes the load ring 42, causing it to expand and thereby increase the contact area between a load shoulder 44 on the load ring 42 and a load shoulder 20 on the housing 12. The shoulders 40, 44, 20 create a path for the load to be transferred to the housing 12. The load ring expansion is limited to elastic expansion to allow it to return to a retracted position when the casing weight is removed. |
