| 摘要 |
<p>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.</p> |
