Floating LNG plant

Patent metadata

Field	Value
Publication number	US-9933119-B2
Application number	US-201113989976-A
Country	US
Kind code	B2
Filing date	Sep 16, 2011
Priority date	Nov 30, 2010
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

The present invention relates to a floating LNG plant ( 1, 1′, 100 ) comprising a converted LNG carrier with a hull and a plurality of LNG storage tanks ( 4, 104 ) wherein in that the floating LNG plant ( 1, 1′, 100 ) comprises: —at least one sponson ( 2, 2′, 3, 3′, 102, 103 ) on the side of the hull, for creating additional hull volume, —process equipment ( 110 ) for LNG processing on the floating LNG plant ( 1, 1′, 100 ), and—a reservoir for storing fluids separated during the LNG processing, wherein said reservoir is formed by the ballast tank or in the space reserved for the ballast tank of the original LNG carrier.

First claim

The invention claimed is:

1. A floating LNG plant comprising:
a converted LNG carrier with a hull and a plurality of LNG storage tanks;
at least a first sponson on one side of the hull for creating additional hull volume, wherein the at least first sponson is a double-walled sponson and is arranged to provide double hull protection;
LNG process equipment for LNG processing on the floating LNG plant;
a reservoir for storing fluids separated during the LNG processing, wherein a process equipment module for LNG processing on the floating LNG plant is installed on additional deck space created by adding of the at least first sponson on the one side of the hull, and a part of the process equipment module weight is supported by the hull of the converted LNG carrier with outboard module supports connected to the at least first sponson; and
a new ballast tank in the additional hull volume created by the at least first sponson on the side of the hull, wherein a function of an original ballast tank that was present in an internal hull space of the converted LNG carrier is taken over by said new ballast tank and wherein the internal hull space for the original ballast tank is used for storing residual fluids which are produced in an LNG liquefaction process, wherein said residual fluids comprise at least one of oils and condensate.

2. The floating LNG plant according to claim 1 , wherein the process equipment module for LNG processing on the floating LNG plant is installed on additional deck space created by the at least first sponson on the side of the hull.

3. The floating LNG plant according to claim 2 , wherein the at least first sponson is used for supporting LNG transfer devices for at least one of loading or unloading LNG.

4. The floating LNG plant according to claim 3 , wherein the converted LNG carrier is an LNG FPSO that is provided with the first sponson on the one side and a second sponson on another side of the converted LNG carrier, the first sponson is used for supporting the LNG transfer devices and the second sponson is used for supporting the LNG process equipment.

5. The floating LNG plant according to claim 3 , wherein the at least first sponson is used for storage of a floating offloading hose.

6. The floating LNG plant, according to claim 1 , wherein a power generation unit is placed within the at least first sponson.

7. The floating LNG plant according to claim 1 , wherein the converted LNG carrier is an LNG FPSO that comprises a mooring system and a fluid transfer system, the fluid transfer system including a swivel and piping connecting the swivel to the LNG process equipment for LNG processing.

8. The floating LNG plant according to claim 7 , comprising an external turret in order to allow the floating LNG plant to be weathervaning moored to a seabed via said external turret.

9. The floating LNG plant according to claim 7 , comprising an offloading buoy in order to allow the floating LNG plant to be weathervaning moored to a seabed via said offloading buoy.

10. The floating LNG plant according to claim 1 wherein an outer shell of the at least first one sponson is provided with a collision protection.

11. The floating LNG plant according to claim 10 , wherein the outer shell of the at least first sponson is protected against collision damage using SPS.

12. The floating LNG plant according to claim 1 , wherein the space for the original ballast talk is used to partially house a newly constructed tank for said fluids wherein said tank extends for its remaining part into the space created by the adding of the at least one sponson.

13. The floating LNG plant according to claim 1 , wherein the original ballast tank is used for storing said fluids.

Assignees

• Bernays Adam
• Wille Hein
• Joynson Jeremy Duncan Stuart
• Single Buoy Moorings

Inventors

• Bernays Adam
• Wille Hein
• Joynson Jeremy Duncan Stuart

Classifications

• Y10T29/49716

  Converting · CPC title

• F25J1/0022

  Hydrocarbons, e.g. natural gas · CPC title

• B63B35/44 Primary

  Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices {(construction methods for floating offshore platforms B63B75/00)} · CPC title

• F17C13/082 Primary

  for large sea-borne storage vessels (load-accommodating arrangements for ships or waterborne vessels B63B25/12) · CPC title

• B63B2035/448

  Floating hydrocarbon production vessels, e.g. Floating Production Storage and Offloading vessels [FPSO] · CPC title