SUB-SEA OIL PRODUCTION METHOD Russian patent published in 2010 - IPC E21B43/01 

FIELD: oil-and-gas industry.

SUBSTANCE: invention related to open sea natural gas production method. Method includes gas and gas fountains collection over the bottom gas extracting areas, using dome-shaped gas collector, installed on the bottom, gas transfer into a gasholder, located under the water, gas compression in the gasholder and the gasholder lifting to the surface. Gas compression executed by transferring gas into gas-hydrate phase. Locate the gasholder during gas receiving and compression under water, above bottom, at depth, where water pressure is greater than natural gas hydrate dissociation pressure, corresponding to hydraulic formation thermo baric conditions, taking into account water temperature and connect to water basin during mentioned period. After the gasholder filling in, insulate its cavity and lift it to the surface, with the following transportation to the refinery place, keeping gasholder's thermo baric conditions at level, excluding natural gas hydrate dissociation. After the gasholder delivery to the treatment area, create thermo baric conditions in its cavity, providing gas hydrate dissociation, which selected for the following treatment, use left in the gasholder water according to its purpose.

EFFECT: equipment design and operation arrangement simplification, possibility of gas compression and pure water production.

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