Thin Wall Active Casing Hanger

摘要

A wellbore system includes a housing assembly and first and second position casing hangers supported by the housing assembly. A load member is provided that is adapted to extend between the first position casing hanger and the housing assembly to enable the housing assembly to support the first position casing hanger. The second position casing hanger is stacked onto the first position casing hanger, and an interface is defined between the first and second position casing hangers to aid in alignment and centralization of the second position casing hanger during installation. The interface also provides radial support to the first position casing hanger and enables loads associated with the second position hanger to be transferred to the housing assembly through the load member.

主权项

1. A wellhead system comprising:
a wellhead with a bore; a first position casing hanger in the bore and comprising an upper end, a lower end, and an axial passage, the lower end of the first position casing hanger including a first connector connected to a first casing string; a second position casing hanger in the bore and comprising an elongated annular body that extends into the axial passage of the first position casing hanger, and a second connector connected to a second casing string; and a centralizing ring set in an annular space between the elongated annular body and the first position casing hanger, so that when the first position casing hanger deflects radially inward in response to axial loads, the centralizing ring supports the first position casing hanger.