INNER RISER ADJUSTABLE HANGER AND SEAL ASSEMBLY

摘要

An inner riser adjustable hanger and seal assembly (10) are provided for applying tension to a casing string (20) secured at a lower end within a well and supported at an upper end by a wellhead housing (12). The wellhead housing has a locking member (14) on an inner surface thereof. A tensioning mechanism (60) tensions the casing string and secures the upper end to the wellhead housing (12). A seal body locking member (24) is radially moveable into engagement with the housing locking member (66) to fix the axial position of the seal body (18) and the wellhead housing, and a lower assembly seals (46) between the seal body and the casing string. The casing string is tensioned without appreciable rotation of the hanger body or the upper and lower seal assemblies.