ROTARY DEVICE Russian patent published in 2002 - IPC

FIELD: underwater extraction of gas and oil. SUBSTANCE: rotary device is tailored for connection with production ship on sea surface and includes main rotary member or rotary member for passage of fluid medium over two conduits as minimum. Auxiliary rotary member is intended for hydraulic/electric connection and is designed for transmission of signals and energy. Rotary member for passage of fluid medium is fitted with body put on upper part of immobile well fittings carrying little number of gate valves such as operational gate valve and ring gate valve. Above-mentioned conduits pass vertically through core of rotary member for passage of fluid medium providing access to well from upper side of rotary member for passage of fluid medium. EFFECT: possibility of employment of production ship of conventional design which can also be used for maintenance of well, increased degree of extraction of product from field with limited stock. 10 cl, 2 dwg