Patent ID: 8813837

Claim:
A wellhead system, comprising: a first wellhead assembly having a bore with an axis and an internal profile and a tag shoulder in the bore; a second wellhead assembly that is lowered into and landed within the bore of the first wellhead assembly, comprising: a load member carried by the second wellhead assembly, the load member being actuable to engage the profile in the first wellhead assembly to enable the first wellhead assembly to support the second wellhead assembly; an actuation member carried by the second wellhead assembly to move the load member into engagement with the profile, the actuation member having an outward extending actuation member shoulder landing on the tag shoulder, the actuation member having a downward extending leg and an inward-extending actuation member protrusion on the leg; an outward extending second wellhead assembly protrusion on the second wellhead assembly, the actuation member having a run-in position wherein the second wellhead assembly protrusion is located on the actuation member protrusion, preventing downward movement of the second wellhead assembly relative to the actuation member after the actuation member has landed on the tag shoulder, until sufficient weight is applied to the second wellhead member to cause the leg to elastically deform, which moves the actuation member protrusion radially outward to allow the second wellhead assembly protrusion to slide past and below the actuation member protrusion; and a retainer ring secured to the second wellhead assembly below the actuation member to retain the actuation member on the second wellhead assembly.