METHOD AND SYSTEM FOR RETAINING A LOCK RING ON A CASING HANGER

摘要

A retention system for limiting axial and radial movement of a wellbore lock ring (18). The retention system includes pins (20) for resisting axial movement of the lock ring and assemblies for limiting radial outward movement of the lock ring. The lock ring circumscribes and couples to a wellbore hanger (12). The pins project radially from the hanger into the lock ring and into slots (24), where the slots extend a distance along the inner surface of the lock ring. The assemblies also project radially into the hanger and each have a portion that registers with a channel on a lower end of the lock ring. Lock ring outer radial movement is limited by contact between the portions of the assemblies and inner surfaces of the channels.