An offshore hydrocarbon cooling system is provided. The system includes one or more hydrocarbon process fluid heat exchangers arranged in heat exchange communication between a hydrocarbon process fluid and a cooling medium fluid, a cooling medium fluid distribution pipe system connected to the hydro
An offshore hydrocarbon cooling system is provided. The system includes one or more hydrocarbon process fluid heat exchangers arranged in heat exchange communication between a hydrocarbon process fluid and a cooling medium fluid, a cooling medium fluid distribution pipe system connected to the hydrocarbon process fluid heat exchangers, and a subsea cooling unit for cooling the cooling medium fluid. The subsea cooling unit includes an inlet and an outlet arranged in fluid communication with the cooling medium fluid distribution pipe system, one or more subsea cooling modules, a first conduit arranged to provide fluid communication between the inlet and the subsea cooling module(s) and a second conduit arranged to provide fluid communication between the subsea cooling module(s) and the outlet. Each cooling module comprises a plurality of cooling pipes configured in heat exchange relationship with surrounding seawater.
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1. A hydrocarbon cooling system for an offshore platform having a subsea structure, said system comprising: one or more hydrocarbon process fluid heat exchangers located on the offshore platform and arranged in heat exchange communication between a hydrocarbon process fluid and a cooling medium flui
1. A hydrocarbon cooling system for an offshore platform having a subsea structure, said system comprising: one or more hydrocarbon process fluid heat exchangers located on the offshore platform and arranged in heat exchange communication between a hydrocarbon process fluid and a cooling medium fluid;a cooling medium fluid distribution pipe system located on the offshore platform and connected to the hydrocarbon process fluid heat exchangers; anda subsea cooling unit for cooling the cooling medium fluid, the subsea cooling unit comprising: an inlet and an outlet arranged in fluid communication with the cooling medium fluid distribution pipe system;one or more subsea cooling modules disposed externally of the subsea structure in open sea, each cooling module comprising a plurality of cooling pipes configured in heat exchange relationship with surrounding seawater, wherein the one or more subsea cooling modules are supported above the sea bed by one or more mud mats residing on the sea bed;a first riser arranged to provide fluid communication between the inlet and the one or more subsea cooling modules; anda second riser arranged to provide fluid communication between the one or more subsea cooling modules and the outlet. 2. The system according to claim 1, wherein the offshore platform is a fixed offshore platform. 3. The system according to claim 1, wherein the offshore platform is a floating offshore platform. 4. The system according to claim 1, wherein the one or more respective mud mats comprise a pallet. 5. The system according to claim 1, wherein the one or more respective mud mats incorporate lengths of pipe through which the cooling medium fluid is circulated and/or distributed to the one or more cooling modules. 6. The system according to claim 1, wherein the one or more cooling modules are located remotely from the offshore platform. 7. The system according to claim 6, wherein the first and second risers are arranged in fluid communication with the cooling modules via respective seabed pipes. 8. The system according to claim 1, wherein the one or more subsea cooling modules are located substantially laterally with respect to the offshore platform. 9. The system according to claim 8, wherein the one or more subsea cooling modules are tethered to the offshore platform. 10. The system according to claim 1, wherein the one or more hydrocarbon process fluid heat exchangers are located subsea. 11. A subsea cooling unit for cooling a cooling medium fluid circulating through a heat exchange circuit on an offshore platform having a subsea structure, the heat exchange circuit having a cooling medium fluid distribution pipe system, the subsea cooling unit comprising: an inlet and an outlet arranged in fluid communication with the cooling medium fluid distribution pipe system;one or more subsea cooling modules disposed externally of the subsea structure in open sea, each cooling module comprising a plurality of cooling pipes configured in heat exchange relationship with surrounding seawater, wherein the one or more subsea cooling modules are supported above the sea bed by one or more mud mats residing on the sea bed;a first riser arranged to provide fluid communication between the inlet and the one or more subsea cooling modules; anda second riser arranged to provide fluid communication between the one or more subsea cooling modules and the outlet. 12. The subsea cooling unit according to claim 11, wherein the plurality of cooling pipes are configured in a manifold of parallel lengths of pipe. 13. A method of cooling a hydrocarbon process fluid on an offshore platform having a subsea structure, said method comprising: passing the hydrocarbon process fluid through a hydrocarbon process fluid heat exchanger and passing a cooling medium fluid through a cooling medium fluid distribution pipe system, wherein said heat exchanger and said pipe system are configured to provide heat exchange communication between the hydrocarbon process fluid and the cooling medium fluid, thereby producing a cooled hydrocarbon fluid and a heated cooling medium fluid; and,cooling the heated cooling medium fluid by passing the heated cooling medium fluid through a subsea cooling unit, wherein the subsea cooling unit comprises: an inlet and an outlet arranged in fluid communication with the cooling medium fluid distribution pipe system;one or more subsea cooling modules disposed externally of the subsea structure in open sea, each cooling module comprising a plurality of cooling pipes configured in heat exchange relationship with surrounding seawater, wherein the one or more subsea cooling modules are supported above the sea bed by one or more mud mats residing on the sea bed;a first riser arranged to provide fluid communication between the inlet and the one or more subsea cooling modules; anda second riser arranged to provide fluid communication between the one or more subsea cooling modules and the outlet. 14. A subsea hydrocarbon cooling system, said system comprising: one or more hydrocarbon process fluid heat exchangers arranged in heat exchange communication between a hydrocarbon process fluid and a cooling medium fluid, wherein the one or more hydrocarbon process fluid heat exchangers are located subsea;a cooling medium fluid distribution pipe system connected to the hydrocarbon process fluid heat exchangers; and,a subsea cooling unit for cooling the cooling medium fluid, the subsea cooling unit comprising: an inlet and an outlet arranged in fluid communication with the cooling medium fluid distribution pipe system;one or more subsea cooling modules disposed in open sea, each cooling module comprising a plurality of cooling pipes configured in heat exchange relationship with surrounding seawater, wherein the one or more subsea cooling modules are supported above the sea bed by one or more mud mats residing on the sea bed;a first riser for providing fluid communication between the inlet and the one or more subsea cooling modules; anda second riser for providing fluid communication between the one or more subsea cooling modules and the outlet.
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Nierenberg,Alan B., Apparatus for the regasification of LNG onboard a carrier.
Minkkinen Ari (Saint Nom la Breteche FRX) Larue Joseph (Chambourcy FRX), Process for the treatment and transportation of a natural gas from a gas well.
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