Vertically moored platform casing tieback

Details Vertically moored platform casing tieback Vertically moored platform casing tieback

E - Fixed Constructions

21

B

166/51.4

E21B 33/035 (2006.01)

Patent

CA 1127964

VERTICALLY MOORED PLATFORM CASING TIEBACK ABSTRACT OF THE DISCLOSURE Special J-slot connectors have been devised for connecting concentric riser pipes and casing from a struc- ture at the surface of a body of water to corresponding con- centric casings set in the sea floor. This can be called a "tieback tool" for sealingly securing a first tubular member suspended from a vessel floating on a body of water to a casing in the wellbore in the bottom of the body of water. Special multiple axially aligned J-slot means are also pro- vided together with means to assure proper "makeup" of the J-slots. Means are also provided for proper alignment of circumferentially spaced J-slot connectors. Special self- energizing seals are also disclosed.

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