METHOD AND SYSTEM FOR OFFSHORE PRODUCTION OF LIQUEFIED NATURAL GAS

摘要

A method and a system for offshore production of liquefied natural gas, wherein natural gas is supplied from an underground source (3) to a field installation (2) for gas treatment. The gas is transferred in compressed form from the field installation (2) to an LNG tanker (15), the transfer taking place via a pipeline (14) surrounded by sea water, and the compressed gas being supplied to a conversion plant (22) which is provided on the LNG tanker (15) and is arranged to convert at least a part of the gas to liquefied form, and the liquified gas being transferred to storage tanks (23) on board the tanker (15). When the storage tanks on the LNG tanker are filled up, the pipeline (14) is disconnected from the LNG tanker and connected to another, similar tanker, the pipeline being permanently connected to a submerged buoy which is arranged for introduction and releasable securement in a submerged downwardly open receiving space in the tanker, and which is provided with a swivel unit for transfer of gas under a high pressure.