Provided is a method and a system for removal of oil under ice through an opening made into ice. The system includes oil booms extending under ice in two different directions from the opening so as to constitute an angle of less than 180 degrees between each other; an oil collection device placed in the opening; and a propulsion device placed on the level of the lower surface of ice at a distance from the opening in the area of the angle so as to provide a flow directed towards the opening between the oil booms in the area of the angle.

Provided is a device for removal of oil under ice through an opening made into ice. The device comprises a long rope mop in the form of an endless loop, a propulsion device provided with a deflection wheel for pulling the rope mop substantially straight under ice, a power device provided with a drive wheel for circulation of the loop through the drive wheel and the deflection wheel and a cleaning device for cleaning of the rope mop from any impurities adhered thereto.

Provided is a device for removal of oil under ice through an opening made into ice. The device comprises a long rope mop in the form of an endless loop, a propulsion device provided with a deflection wheel for pulling the rope mop substantially straight under ice, a power device provided with a drive wheel for circulation of the loop through the drive wheel and the deflection wheel and a cleaning device for cleaning of the rope mop from any impurities adhered thereto.

Apparatus for recovering spilled oil in water infested with floating ice or other debris comprises a fence having an upper rail and lower rail encircling an area to receive an oil skimmer. A plurality of buoyancy units maintain the fence at an appropriate water level. An ice-deflecting cone covers the bottom of the fence when the apparatus is deployed. A plurality of cables may be attached to the upper rail of the fence to raise and lower the apparatus into the water. The fence is preferably circular, with a diameter in the range of 10 to 50 feet. The fence preferably includes a plurality of spaced-apart vertical supports between the upper and lower rails to keep chunks of ice or other debris from entering into the encircled area, and the lower barrier structure is perforated, with openings in the range of less than an inch to several inches.

Apparatus for recovering spilled oil in water infested with floating ice or other debris comprises a fence having an upper rail and lower rail encircling an area to receive an oil skimmer. A plurality of buoyancy units maintain the fence at an appropriate water level. An ice-deflecting cone covers the bottom of the fence when the apparatus is deployed. A plurality of cables may be attached to the upper rail of the fence to raise and lower the apparatus into the water. The fence is preferably circular, with a diameter in the range of 10 to 50 feet. The fence preferably includes a plurality of spaced-apart vertical supports between the upper and lower rails to keep chunks of ice or other debris from entering into the encircled area, and the lower barrier structure is perforated, with openings in the range of less than an inch to several inches.