GAS HOLDER Russian patent published in 2010 - IPC E21B43/01 F17C1/00 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to facilities for intake and transporting gas and is used for extraction of natural gas in open sea, particularly for extraction of gas freely coming out from out gassing bottom surfaces. The gas holder consists of a case designed to be immersed into water thickness and to be lifted out of it, of an aperture for gas intake and of a device for gas discharge. The gas holder has buoyancy close to zero, while its case is designed to provide towing of the gas holder with a tugboat when it is either on sea surface or in immersed position. The case facilitates maintaining thermo-baric conditions in the cavity at level, which eliminates dissociation of natural gas hydrate; for this purpose it is equipped with facilities of thermo-insulation and/or cooling the cavity, and/or is made with consideration of internal pressure not less, than pressure corresponding to pressure of dissociation of natural gas hydrate at temperature maintained in the cavity of the gas holder. The gas holder is equipped with facilities for intake of gas from the installation for gas accumulation; its cavity can communicate with water area. A bottom part of the gas holder is equipped with an intake aperture of water receiving pipeline.

EFFECT: facilitating gas compaction due to utilisation of potential energy of environment and simultaneous production of gas and fresh water.

10 cl, 2 dwg