UNDERWATER PLANT AND METHOD FOR SEPARATION OF LIQUID FRACTION AND GAS FRACTION Russian patent published in 2012 - IPC E21B43/36 

FIELD: oil and gas industry.

SUBSTANCE: underwater plant contains pipe-lines system which includes the first header connected with at least one well and at least two first pipe branches with inlet channel connected with the first header. First pipe branches contain at least two outlet channels. The first header and first pipe branches are located in the first plane, and one of outlet channels of first pipe branches leads to the second header. According to the invention, the second of outlet channels of first pipe branches leads to at least two second pipe branches located in the second plane below the first plane. At least one of specified outlet channels forms inlet channel of second pipe branches. Second pipe branches contain at least one inlet channel leading to the third header. Longitudinal axis of the first header is perpendicular to longitudinal axes of first pipe branches. First pipe branches are located so that their longitudinal axes are parallel to each other.

EFFECT: providing underwater plant which, as applied to pump, will operate as buffer system or, as applied to recovery of oil-and-gas wells, as a system for destruction of possible plugs which may be formed, or it will operate as a separator of well product phases, for example oil-gas, oil-gas-water, oil-water.

12 cl, 2 dwg