Contingency tieback adapter

Details Contingency tieback adapter Contingency tieback adapter

1992-11-02

1994-11-29

Nicholson, Eric K.

Pipe joints or couplings

With assembly means or feature

166348, 285141, 285308, 285 3, F16L 3708

Patent

active

053683358

ABSTRACT:
A tieback system for a subsea well employs a tieback member that can be utilized in the event tieback threads in the casing hanger become damaged. An annular groove is formed in the bore of the wellhead housing above the casing hanger. The tieback member connects to tieback conduit and has a lower end that slides into the interior of the casing hanger. A locking device will lock the tieback member to the groove in the wellhead housing. The locking device includes a retainer which carries a radially movable locking members that are cammed outward by downward movement of the tieback member relative to the retainer.

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patent: 4519633 (1985-05-01), Nichols
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patent: 4919454 (1990-04-01), Caulfield et al.
patent: 4976458 (1990-12-01), Hosie et al.
patent: 5080173 (1992-01-01), Brammer
patent: 5163514 (1992-11-01), Jennings

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