MOORING TURRET OF DRILLING SHIP Russian patent published in 2014 - IPC B63B22/02 B63B35/44 E21B43/01 

FIELD: mining.

SUBSTANCE: according to the invention, inside the housing of a drilling ship mooring turret, which has a cylindrical housing with a drilling shaft and an anchor retention system of the ship, in its lower part there installed is an annular cylindrical structure with ballast compartments, which can move vertically along guides below the main plane of the drilling ship. Inside the shaft there arranged are deflectors located along the perimeter of the shaft on its walls above the ship waterline.

EFFECT: invention of a drilling ship mooring turret structure allows protecting a riser pipe at drilling operations under ice conditions and protecting against flooding of an upper deck of the drilling ship through the drilling shaft at stormy drift or at transition of the drilling ship under conditions of considerable disturbance, especially at negative air temperature contributing to formation of ice on deck structures of the drilling ship.

2 dwg