E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/013 (2006.01) E21B 7/132 (2006.01) E21B 43/01 (2006.01) E21B 43/017 (2006.01)
Patent
CA 2248683
An underwater installation for use in offshore drilling of and production from, respectively, oil and/or gas wells at deep and moderate deep water comprises an intermediate station in the form of a buoyancy based hollow body (16) tension strut anchored at the seabed (10) and located at a depth substantially closer to the surface of the sea than the seabed (10). At least one hydrocarbon conveying pipeline extends between the buoyancy body (16) and seabed depth, for the transfer of hydrocarbons from the reservoir to said buoyancy body (16). At least one casing liner string (18a-18h) constitutes the tension leg/strut anchoring of the buoyancy body (16). The invention also relates to a method for the building of an underwater installation.
Installation sous-marine à utiliser dans le forage offshore et l'exploitation, respectivement, de puits de pétrole en eau profonde et moyennement profonde. Ladite installation comporte une station intermédiaire se présentant sous la forme de jambes de force d'un corps creux flottant (16), ancrées dans le fond marin (10) et situées à une profondeur sensiblement plus proche de la surface de la mer que du fond (10). Au moins un pipeline de transport d'hydrocarbures s'étend entre le corps flottant (16) et le fond marin pour le transfert d'hydrocarbures depuis le réservoir jusqu'audit corps flottant (16). Au moins un train de chemises du tubage (18a-18h) constitue l'ancrage formant jambe de force du corps flottant (16). L'invention concerne aussi un procédé de construction d'une installation sous-marine.
Atlantis Deepwater Technology As
Magnussen Terje
Sim & Mcburney
LandOfFree
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