A casing hanger assembly allowing for the application of tension

摘要

An adjustable hanger for maintaining tension on casing and tubing extending between a subsea wellhead and a surface wellhead on a platform includes a tubular outer body 45 movably coupled to an external surface of the casing hanger and a housing 21 that has an internal grooved profile 49. Also present is a split ring 47 having a tapered internal diameter and an external grooved profile adapted to mate with the internal grooved profile 49 of the housing 21. An energising ring 51 is releasably coupled to an external surface of the tubular outer body 45 and includes a tapered outside diameter at a lower end for engaging the tapered internal diameter of the split ring 47. At the upper end of the energising ring 51 are lugs 63 for releasably engaging a running tool (33, fig 1). Also claimed is a running tool assembly for running a casing hanger assembly that includes an internal grooved profile and a torque sleeve 73. Additionally there is claimed a method of running a casing hanger assembly which includes an internal grooved profile characterised by using the running tool to rotate an outer portion of a casing and displacing an outer portion of the casing hanger assembly in a longitudinal direction relative to the casing.