MOBILE ARCTIC DRILLING SYSTEM OF YEAR-ROUND OPERATION Russian patent published in 2011 - IPC E21B17/00 E21B7/12 

FIELD: oil and gas production.

SUBSTANCE: group of inventions refers to mobile arctic drilling system of year-round operation (MYADS) for drilling sea boreholes and/or performing other operations on platform in multiple successive points of boreholes location in arctic or sub-arctic climate. The disclosed invention combines ability of transfer into various points of boreholes location and strength for withstanding ice load at the place of borehole location. Also, in arctic or sub-arctic regions there is present ice surface. A concept of a multi-support "self-lifting" platform is implemented in MYADS wherein the supports telescope from a case while maintaining anchoring on bottom soil and providing case lifting from water. Inertia moment of the supports approximately equals from 100 m⁴ to 130 m⁴.

EFFECT: transfer to various points of borehole location; strength facilitating tolerance to loads from ice formation when system is positioned on point of borehole location and when there is present ice surface in sub-arctic zone.

46 cl, 18 dwg