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Midship Turret/Swivel Retrofit for Existing Vessels

IP.com Disclosure Number: IPCOM000241477D
Publication Date: 2015-May-04
Document File: 2 page(s) / 49K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention seeks to allow the conversion of an existing vessel into a fixed production facility with a near midship positioned turret. Typically, conversions of existing vessels to weathervaning turret moored assets were performed by attaching the turret to the bow. This is much easier to do than to cut into an existing vessel to add an internal turret. However, an internal turret can offer some advantages in terms of the motions and loads in the area of the turret. Therefore, this invention is to propose that the internal turret be attached to the outside of the vessel, closer to the midship. This would prevent significantly cutting into the existing vessel to gain the benefits of an internal turret. This would require that the swivel be submerged below the keel of the vessel to allow the flow of hydrocarbons or otherwise to the vessel. The swivel would remain geofixed, and the turret would weathervane with the vessel.

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Midship Turret/Swivel Retrofit for Existing Vessels

Abstract

This invention seeks to allow the conversion of an existing vessel into a fixed production facility with a near midship positioned turret. Typically, conversions of existing vessels to weathervaning turret moored assets were performed by attaching the turret to the bow. This is much easier to do than to cut into an existing vessel to add an internal turret. However, an internal turret can offer some advantages in terms of the motions and loads in the area of the turret. Therefore, this invention is to propose that the internal turret be attached to the outside of the vessel, closer to the midship. This would prevent significantly cutting into the existing vessel to gain the benefits of an internal turret. This would require that the swivel be submerged below the keel of the vessel to allow the flow of hydrocarbons or otherwise to the vessel. The swivel would remain geofixed, and the turret would weathervane with the vessel.

Main Body

This invention places the turret and swivel around the outside of the vessel rather than interior to the vessel or attached to the bow of the vessel. The swivel is submerged under the keel of the vessel for fluids transfer. Additionally, the swivel could be made to be disconnectable. This would allow the system to be connected offshore and disconnected prior to severe weather. The fluids piping would extend from the swivel up to the topsides.

The benefits of this system are:

•       Can re...