The Low Pressure Housing Provides A Location Point For The Drilling

1740 Words Nov 3rd, 2016 7 Pages
Lower Pressure Housing
The low-pressure housing provides a location point for the drilling guide base, and provides an interface for the 18¾-in. (476.25mm) provides an interface for the 18¾-in. (476.25mm) high-pressure housing. It is important for this first string to be jetted or cemented in place correctly, because this string is the foundation for the rest of the well (Petrowiki)
2.1.3 High-Pressure Housing
The subsea high-pressure wellhead housing (typically 18¾ in. (476.25mm)) is, effectively, a unitized wellhead with no annulus access. It provides an interface between the subsea BOP stack and the subsea well. The subsea wellhead is the male member to a large-bore connection, as shown in (the female counterpart is the wellhead connector on the bottom of the BOP stack), that will be made up in a remote subsea, ocean-floor environment. The 18¾-in (476.25mm) wellhead will house and support each casing string by way of a mandrel-type casing hanger. The internal diameter of the 18¾-in (476.25mm) wellhead provides a metal-to-metal sealing surface for the seal assembly, when it is energized around the casing hanger. The wellhead provides a primary landing shoulder in the bottom ID area to support the combined casing loads, and will typically accommodate two or three casing hangers and a tubing hanger. The minimum ID of the wellhead is designed to let a 17½-in (438.15mm) drilling bit pass through. (Petrowiki)
2.1.4 Casing hangers
All subsea casing hangers are mandrel type. The…
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