Patent ID: 8186426

Claim:
A seal assembly for sealing within an annulus between inner and outer coaxially disposed wellhead members, the inner wellhead member being axially expandable, the seal assembly comprising: a metal seal element disposable within the annulus and having an inner leg and an outer leg; an energizing ring selectively insertable into a slot between the inner and outer legs in the seal element and having, a cam surface an inner circumference; and an annular lockdown member having a wickered profile on an inner radial surface of the lockdown member and that is selectively moveable from unengaged configuration unengaged with the inner wellhead member into an engaged configuration with the profile engaged with a corresponding wickered profile on the inner wellhead member, so that when the energizing ring is inserted into the slot and the cam surface of the energizing ring contacts an outer radial surface of the lockdown member, the lockdown member is moved into the engaged configuration with the inner wellhead member and is moveable with respect to the outer wellhead member as the inner wellhead member thermally expands; and an upward facing shoulder on an inner circumference of the energizing ring below the lockdown member, so that when the energizing ring is moved upward from the slot and the cam surface of the energizing ring is moved away from the lockdown member, the upward facing shoulder engages a lower end of the lockdown member to move the lockdown member from the annulus.