Single Buoy Moorings Inc.

Jeremy Duncan Stuart Joynson

Jack Pollack

Hein Wille

Adam Bernays

Dirk Johan Van Der Zee

Fabrice Dupray

The present invention relates to a floating LNG plant () comprising a converted LNG carrier with a hull and a plurality of LNG storage tanks () wherein in that the floating LNG plant () comprises: &#x2014;at least one sponson () on the side of the hull, for creating additional hull volume, &#x2014;process equipment () for LNG processing on the floating LNG plant (), and&#x2014;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.

Floating LNG plant

A water stream is treated to remove oxygen before injecting the water into an underground hydrocarbon reservoir. The water-oxygen mixture is separated by centrifugal action using fixed spin blades (). Oxygen is removed from the center of the conduit through a gas pipe () coupled to a vacuum pump (). Nitrogen may be introduced upstream of the centrifuge to dilute the water-gas solution to improve the efficiency of the gas-liquid separation.

Gas/liquid separation in water injection into hydrocarbon reservoir

Water that is produced during offshore hydrocarbon processing, such as hot produced water accompanying hydrocarbons taken from subsea reservoirs, or cold water resulting from heating LNG (liquified natural gas) to convert it to gas, is changed in temperature to be closer to that of the surrounding sea using apparatus of minimal cost. The apparatus includes a mixer tube () that lies totally submerged in the sea and a nozzle () that receives the produced water and that has a nozzle end () lying in a middle portion of the mixer tube. A location of the mixer tube middle portion at the nozzle end has an inside diameter (A) much larger than the nozzle end outside diameter (B) to induce the through flow of sea water from the surrounding sea through the mixer tube. The produced water is pumped to a high enough pressure to create turbulence in the mixer tube immediately downstream of the nozzle end to better mix the produced and sea waters.

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Des Papalins, Monaco

Jeremy Duncan Stuart Joynson