OFFSHORE NATURAL GAS EXTRACTION PLANT Russian patent published in 2010 - IPC E21B43/01 

FIELD: oil and gas industry.

SUBSTANCE: plant includes dome gas collector provided with possibility of being installed on the bottom surface, the cavity of which is interconnected with cavity of accumulating capacity equipped with outlet pipeline the end of which is fixed on buoyancy equipped with device of radio communication with the collecting ship equipped with attachment device with outlet hole of outlet pipeline. Plant includes at least two dome gas collectors. Accumulating capacity is open from below, it has dome shape and positive buoyancy. Ends of pipelines of gas collectors are fixed in the space under the accumulating capacity, thus excluding the possibility of carrying-over of the gas leaving them from the accumulating capacity cavity. Pipelines are rising throughout their length; at that, at least outlet pipeline and pipelines of gas collectors are equipped with electric heating devices. Accumulating capacity is located above the bottom so that its top can be located at the depth where water pressure exceeds the pressure of dissociation of natural gas hydrate at the temperature corresponding to the annual maximum of water temperature.

EFFECT: simplifying the design of the equipment providing the gas collection, simplifying the arrangement of the gas extraction operation of the collecting ship.

6 cl, 1 dwg