Patent ID: 8683823
Filing Date: 2014-04-01
Classification: B63B,F17C,F25J

Abstract:
1. A fuel efficient floating system for processing natural gas offshore using well gas from a well at sea using a dual nitrogen expansion process for liquefying natural gas offshore, the system comprising: a. a moored floating production storage and offloading vessel for receiving well gas from one or more wells; b. a primary processing unit mounted on the moored floating production storage and offloading vessel, the primary processing unit comprising: (vii) a booster compressor receives the removed flash gas and forms compressed flash gas and transfers the compressed flash gas to the primary separation unit for additional processing; c. a gas treatment unit mounted on the moored floating production storage and offloading vessel for receiving the high pressure flash gas stream comprising: d. a moored disconnectable turret for receiving the precooled high pressure feed gas through a flexible conduit; e. a floating liquefaction vessel connected to the moored disconnectable turret, the floating liquefaction vessel comprising: f. wherein the system enables the floating liquefaction vessel to quickly disconnect from the disconnectable turret, transit to sheltered water and discharge cargo to at least one liquefied natural gas trading tanker in sheltered water, avoiding offshore transfer of liquefied natural gas.