Production casing tieback connector assembly

Details Production casing tieback connector assembly Production casing tieback connector assembly

E - Fixed Constructions

21

B

166/51.4

E21B 17/08 (2006.01) E21B 33/038 (2006.01)

Patent

CA 1181001

PRODUCTION CASING TIEBACK CONNECTOR ASSEMBLY ABSTRACT OF THE DISCLOSURE A connector assembly for connecting a production casing (38) to a subsea wellhead (10) from a tensioned leg platform. A funnel (46) external to the wellhead, guides and aligns the conduc- tor during installation and places a limit on the angular deflection of the conductor relative to the wellhead. The conductor includes at its lower end a tieback joint (44) which is pulled down, aligned, and sealed against the casing hanger (24) with a floating bushing (64) which also preloads the seal (66). The flexibility of the tieback joint (44) in relation to the angular deflection permitted is such that the surfaces of the seal (66) will not move; and preferably the preload on the seal is not removed.

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