Cuttings injection and annulus remediation systems for...

Details Cuttings injection and annulus remediation systems for... Cuttings injection and annulus remediation systems for...

2005-03-29

2005-03-29

Dang, Hoang (Department: 3672)

Wells

Submerged well

Connection or disconnection of submerged members remotely...

C166S088400, C166S089100, C166S090100, C166S368000

Reexamination Certificate

active

06871708

ABSTRACT:
A wellhead assembly has an inner wellhead that lands in an outer wellhead, the inner wellhead having first and second internal passages. Each passage has an upper opening at the outer surface of the inner housing and a lower opening at the inner surface. An external shoulder of a casing hanger lands on an internal shoulder of the inner housing, the lower opening of the first passage being below the internal shoulder, the lower opening of the second passage being above the internal shoulder. The casing hanger has a substantially-vertical passage located in its sidewall, an upper port registering with the lower opening of the second passage, a lower port being located below the external shoulder for communicating with the annulus. Valve assemblies at the upper openings control the flow of heavy fluid injected into a casing annulus through the second passage and of cuttings injected into the annulus through the first passage.

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