SUBSEA WELLHEAD WITH SEGMENTED FATIGUE REDUCTION SLEEVE

摘要

A subsea wellhead comprises a generally cylindrical body including a lower extension (9) for forming an annular space (11) for a cement column between the lower extension and an outer conductor. The extension carries a multiplicity of interfitting rings (13b) forming a sleeve which facilitates the flexure of the extension in the presence of the cement column. Each ring may comprise an inner flange for disposition adjacent the outside of the extension and an outer flange for fitment over the inner flange of an adjacent ring. The outer flange may have a radial through-bore.