| 摘要 |
WELLHEAD ASSEMBLIES, SEAL ASSEMBLIES, AND METHODS OF LOCKING DOWN AN ANNULUS SEAL (22) DISPOSED WITHIN AN ANNULUS (16) BETWEEN OUTER AND INNER WELLHEAD MEMBERS (12, 13), ARE PROVIDED. A SEAL ASSEMBLY (21) IS POSITIONED IN AN ANNULUS (16). AN ENERGIZING MEMBER (24, 41) IS AXIALLY TRANSLATED DOWNWARD TO ENERGIZE AN ANNULUS SEAL ELEMENT (22) AND OUTWARDLY RADIALLY COMPRESS A HIGH-STRENGTH LOCKDOWN MEMBER (25) INTO CONTACT WITH AN INNER DIAMETER SURFACE (15) OF A WELLHEAD MEMBER (12). THE WELLHEAD MEMBER (12) CAN INCLUDE A SET OF WICKERS (32). DURING COMPRESSION, THE OUTER DIAMETER SURFACE (35) OF THE LOCKDOWN MEMBER (25) IS PLASTICALLY DEFORMED ONTO THE SET OF WICKERS (32). THE MOST ILLUSTRATIVE DRAWING IS |
