Adjustable threaded hanger
View Patent ↗An adjustable hanger for retaining in tension casing and tubing extending between a subsea wellhead and a surface wellhead on a platform.
1. A casing hanger assembly for hanging a string of casing on the interior of a housing that includes an internal grooved profile and an internal load shoulder, comprising:
a tubular casing hanger comprising an upper end comprising internal threads for releasably coupling the casing hanger to a running tool and a lower end adapted to be coupled to an upper end of the string of casing;
a tubular outer body movably coupled to an external surface of the tubular casing hanger comprising a tapered external surface at a lower end for engaging the internal load shoulder of the housing;
a split ring movably coupled to an external surface of the tubular outer body comprising a tapered internal diameter and an external grooved profile adapted to mate with the internal grooved profile of the housing; and
an energizing ring releasably coupled to an external surface of the tubular outer body comprising a tapered outside diameter at a lower end for engaging the tapered internal diameter of the split ring and one or more lugs at an upper end for releasably engaging the running tool.
2. The casing hanger assembly of claim 1 , further comprising:
a stop ring releasably coupled to an external surface of the tubular casing hanger for limiting displacement of the tubular outer body relative to the tubular casing hanger.
3. The casing hanger assembly of claim 1 , further comprising:
one or more torque keys coupled to an external surface of the tubular outer body and movably coupled to an internal surface of the energizing ring for transmitting torque from the tubular outer body to the energizing ring.
4. The casing hanger assembly of claim 3 , further comprising:
a retainer ring coupled to an external surface of the tubular casing hanger for retaining the torque keys to the tubular outer body.
5. The casing hanger assembly of claim 1 , wherein the energizing ring comprising a plurality of circumferentially spaced apart lugs at an upper end for transmitting torque from the running tool to the energizing ring.
6. The casing hanger assembly of claim 1 , wherein the lugs at the upper end of the energizing ring comprise internal threads.
7. The casing hanger assembly of claim 1 , further comprising:
one or more shear pins coupled to an external surface of the tubular casing hanger for releasably holding the energizing ring in an upper position relative to the tubular casing hanger.
8. The casing hanger assembly of claim 1 , further comprising:
a spacer ring movably coupled to an external surface of the tubular casing hanger comprising a lower end coupled to the lugs of the upper end of the energizing ring; and
a tubular seal assembly comprising a lower end coupled to an upper end of the spacer ring and an upper end adapted to be releasably coupled to the running tool.
9. The casing hanger assembly of claim 1 , further comprising:
one or more pins coupled to an external surface of the tubular casing hanger and movably coupled to the split ring for preventing rotation of the split ring relative to the tubular casing hanger.