Patent ID: 8978772
Filing Date: 2015-03-17
Classification: E21B

Abstract:
1. A wellhead assembly comprising: A wellhead member defining a bore having a shoulder, the bore having a conical profile that decreases in diameter in an upward direction; A hanger landed on the shoulder within the bore of the wellhead member and defining an annulus between the wellhead member and the hanger; A hanger seal ring for disposal within the annulus, and for engagement with an inner surface of the wellhead member, and an outer surface of the hanger so that the hanger seal ring prevents flow through the annulus; and A nose ring having first and second ring components, the nose ring for attachment to a lower end of the hanger seal ring, the first ring component having a conical surface for engagement with the conical profile in the bore of the wellhead member, and the second ring component for engagement with the hanger to limit upward axial movement of the hanger; Wherein the first and second ring components are rigidly attached one to another by a shear element prior to engagement with the hanger and the conical profile in the bore of the wellhead member.