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US 6,182,763 B2Granted
Subsea module
AssigneeDen Norske Stats Oljeselskap A.S.
InventorsAtle Ingebrigtsen, Jørgen Eide
Life of this patent
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Abstract
Subsea unit for offshore production of oil or gas, comprising one or more wellheads with associated christmas trees provided on or at a bottom frame (template). On or at the template there is mounted a swivel device, having fluid connection to the christmas tree or trees and being provided with connection members for risers and an umbilical or control cable from a production vessel at the sea surface.
Claims9
A subsea module for offshore production of oil or gas, comprising:
- a well template having a number of locations for christmas trees;
- at least one wellhead;
- at least one christmas tree mounted on the at least one wellhead;
- a swivel device provided in one christmas tree location, the swivel device having fluid connection to the at least one christmas tree and the swivel device being rotatable about a first, central vertical axis;
- at least one connecting member provided on the swivel device for connection with at least one riser and another connecting member provided on the swivel device for connection with an umbilical or control cable from a production vessel at sea surface;
- a housing rotatable about the first central, vertical axis;
- at least one attachment member provided on the housing;
- a yoke connected to the at least one attachment member and pivotable about a horizontal axis at one end, the yoke adapted to be connected at its other end to at least one mooring line of the production vessel.
5 more elements
Dependencies are inferred from the claim text.