310results about "Ice breakers" patented technology

An offshore floating production, storage, and off-loading vessel has a monolithic non ship-shaped hull of polygonal configuration surrounding a central double tapered conical moon pool and contains water ballast and oil storage compartments. The exterior side walls of the hull have flat surfaces and sharp corners to cut ice sheets, resist and break ice, and move ice pressure ridges away from the structure. An adjustable water ballast system induces heave, roll, pitch and surge motions of the vessel to dynamically position and maneuver the vessel to accomplish ice cutting, breaking and moving operations. The moon pool shape and other devices on the vessel provide added virtual mass capable of increasing the natural period of the roll and heave modes, reducing dynamic amplification and resonance due to waves and vessel motion, and facilitate maneuvering the vessel. The vessel may be moored by a disconnectable turret buoy received in a support frame at the bottom of the moon pool and to which flexible well risers and mooring lines are connected.

An optical power transfer system comprising a fiber spooler, a fiber optic rotary joint mechanically connected to the fiber spooler, and an electrical power extraction subsystem connected to the fiber optic rotary joint with an optical waveguide. Optical energy is generated at and transferred from a base station through fiber wrapped around the spooler, through the rotary joint, and ultimately to the power extraction system at a remote mobility platform for conversion to another form of energy.

The invention discloses a multi-body arctic navigation ship which comprises a plurality of ship body structures. The ship body structures comprise an ice-breaking stem structure, a cargo compartment structure, a head ballast tank, a tail ballast tank, a side ballast tank and an engine room. The upper portions of the ship body structures are provided with superstructures, and the tails of the ship body structures are provided with a plurality of propellers. The head ballast tank is communicated with the tail ballast tank and the side ballast tank through pipes; and among the head ballast tank, the tail ballast tank and the side ballast tank, the water flow direction is controlled through a solenoid valve and a ballast pump. According to the multi-body arctic navigation ship, a conventional mode of ice breaking by a single ship body is replaced with multi-ship body ice breaking, and the ice-breaking capability and flexibility during polar region ice region navigation are greatly improved; and the ship expands an ice breaking area, so that a safer navigation region is opened up. A head molded line is optimized, and main engine power needed for ice region navigation is reduced.

A floating support for off-shore oil production in an arctic or antarctic zone, the support being fitted under its hull with a disconnectable turret from which there extend anchor lines connected to the sea bottom and bottom-to-surface connection pipes. The hull including lateral sides extending in its longitudinal direction. The longitudinal lateral sides of the support carry respective pluralities of devices for localized destruction of pack ice, each device having a destruction tool having at least one pointed portion suitable for breaking pack ice by repeated actuation in vertical pivoting and/or translation of the tool relative to the side, the point, on moving downwards, thus bearing in localized manner against the surface of the pack ice with a force that is preferably at least 10,000 kN. The tool being actuated in pivoting and/or translation with the help of a pivoting and/or translation guide structure applied against the side of the support.

The invention discloses an auxiliary device for an icebreaker, which includes a connecting frame and a mechanical frame. A motor and a reducer are arranged on the frame, and a main shaft is arranged in the mechanical frame. A limit bar is set, and a positioning screw is set on the spur wheel; a sling is set on the mechanical frame, and a hoist is set on the bow, and the sling is connected to the hoist; the advantage of the present invention is that the ice layer can be easily broken and the icebreaker can be pulled forward , greatly improving the ice-breaking efficiency and ice-breaking thickness.

A system and method for clearing an approaching floating ice mass comprising locating a hydrocarbon development platform in a marine environment, and determining a direction from which the ice mass is approaching the hydrocarbon development platform. The method also includes providing an intervention vessel having a water-agitating mechanism associated therewith for propagating artificially generated waves towards a leading edge of the approaching ice mass to fracture the ice mass along the leading edge, thereby causing small ice pieces to separate from the ice mass.

The invention discloses an ice-breaker bow structure. The transverse section of a forwards-bent stem (4) of the bow line type is in a V shape. The included angle (a) between each vertical line and a corresponding middle longitudinal section line is 40 degrees-70 degrees. The bottom end of the bow is provided with a wedge-shaped front heel (5) of which the height (h) is 75%-125% of the thickness of an ice layer, the included angle (c) between a front end profile (6) of the wedge-shaped front heel and the vertical direction is 1 degree-8 degrees, and the front heel is in smooth connection with an ice-breaker body. According to the ice-breaker bow structure, by improving the line type of the polar ice-breaker bow, the stem is bent forwards, the transverse section is in the V shape, and the bottom end of the bow is provided with the novel bow line type of the wedge-shaped front heel through a knuckle line, so that the ice-breaker body has the effects that the icebreaking ability is high, the icebreaking resistance is low, ice is easy to discharge, the risk that ice blocks enter an icebreaker back propeller working area can be reduced, and the polar ice-breaker is prevented from stranding accidents.

The invention belongs to the technical field of ocean and inland river ice breaking, and particularly relates to a bubble ice breaking method. A bubble generating device is used for pulsation bubbles at the position, vertically away from an ice layer by D, below the ice layer, D is larger than 0 and smaller than 2R, R is the maximum radius capable of being reached by the bubbles generated by the bubble generating device under the situations that the water depth is the same, and the ice layer does not exist, the near ice layer is damaged through the movement of underwater movable bubbles, and ice breaking is conducted; one or more bubbles are generated in water, the bubbles are expanded and then contracted, and ice layer damage is caused through at least one of the following four forms. According to the bubble ice breaking method, designing and manufacturing of an ice breaker are not needed, throwing of bombs, explosives and the like is not needed, and cost is saved; a mechanical structure does not directly collide with the ice, and damage of a ship body or a machine is avoided; and substances such as the explosives do not need to be used, explosion pollutants are avoided, and the bubble ice breaking method is more environment-friendly and safer.

The invention relates to a semi-submersible vessel for offshore operations which is suitable to be operated in icy waters and in ice-free waters, said vessel comprising: -an operating deck to accommodate equipment; -at least one lower hull; -an essentially vertical connecting structure between the at least one lower hull and the operating deck; -a ballast system to ballast or deballast the vessel; ; wherein the connecting structure has a water portion and an icebreaking portion being arranged on top of each other, wherein the vessel is configured to have an icebreaking draft for icy waters in which the water- or iceline is substantially level with the icebreaking portion, and a water draft for ice-free waters in which the waterline is substantially level with the water portion, wherein the icebreaking portion has a closed tapered contour, and wherein during the water draft the collective area of the water portion of the connecting structure intersecting the water surface is smaller than the collective area of the icebreaking portion of the connecting structure intersecting the water surface during the icebreaking draft.

The invention discloses a water surface toggle ice crusher, which comprises a frame and a power machine arranged on the frame, wherein a floating box is arranged on the bottom surface of the frame, two brackets are arranged on the two sides of the frame separately, a main drive shaft is arranged between the two brackets, two flywheels are fixedly arranged at two ends of the main drive shaft separately, two sides of the frame extend forwards and overtop the floating box, and then extend upwards, thereby two front arms are formed, wherein a rotating shaft is arranged between the upper portions of the two front arms while a secondary drive shaft is arranged between two lower portions of the two front arms, striking arms are fixedly connected with two ends of the rotating shaft, an ice breaking hammer is fixedly connected with the lower portion of the striking arm, a connecting rod is connected to the flywheel via hinge while the other end of the connecting rod is connected to the striking arm via hinge, a rolling wheel is fixedly arranged on the secondary drive shaft, the power machine is in driving connection with the main drive shaft while the main drive shaft is in driving connection with the secondary drive shaft. The water surface toggle ice crusher is simple in structure and adapted for small area water, which is capable of breaking ice continuously with sound ice breaking effect.

The present invention discloses apparatuses, systems, and methods for operating a marine vessel, drilling subsea wells, and producing hydrocarbons therefrom. The marine vessel comprises at least two matching pairs of controlled azimuthing propulsion devices to ice-vane the vessel in the event of a changing ice drift or other conditions and keep station in a body of water containing pack ice. In one embodiment, a matching pair of azimuthing propulsion devices are provided. In one embodiment, the propulsion devices share a single physical axis of rotation and in another each propulsion device has its own physical axis of rotation. In another embodiment, the azimuthing propulsion devices are controlled by an automatic control system with a feedback loop. In yet another embodiment, the vessel is substantially oblong having a centrally mounted turret with mooring lines capable of disconnecting from the vessel.

This invention discloses a boat and especially to the one suitable for sailing on ice, whose minimum water level and maximum water level left and right sides a quarter flow angle is between the twenty degrees and twenty six degrees to effectively decrease the resistance on the ice sailing and the push power needed by the boat motor and ensure the drainage volume of the boat.

The invention relates to a vessel or a floating structure operating in ice-covered waters comprising a hull or the like (1, 1 ') including at least one bow-like end or a similar hull portion (2, 2'), which is exposed to the loading effect of the ice, while the ice or the vessel is moving. Said bow-like end or a similar hull portion (2, 2'), in the underwater part of the hull, is equipped with means for leading one or several strong, mainly upwards-directed flows of water towards the ice or the ice field encountered by the bow-like end or a similar hull portion (2, 2'). The invention also relates to a method of using the vessel or the floating structure.

The invention relates to shipbuilding, and more specifically to the icebreakers and tugboats intended for operation in ice in shallow water conditions. The proposed invention is aimed to improve maneuverability of the ship running both ahead and astern in constrained environment in ice and in open water, as well as to improve its icegoing capabilities and to effectively handle air penetration to the operating AZT propellers and ship propulsors. For this purpose the icebreaker intended for operation preferably in shallow freezing waters comprising a hull with a sled-like stern overhang having flat bottom and ice protection shield along the perimeter of the overhang, and podded propulsion system disposed in the overhang and comprising two side propulsors mounted on the shafts symmetrically to the ship's CL, and arranged with regard to hull height so that the propulsor's tip edges do not protrude beyond the ship's base plane and design waterline at the propellers' location, and, according to the invention, is fitted with two 360-degree azimuth thrusters (AZT) equipped with pulling propellers mounted on the AZT shafts in front of their pods with blade tip edges not protruding beyond the base plane and arranged symmetrically to the ship's CL displaced sternward in such a way that the distance between the disks of AZT propellers and disks of side propulsors is not greater than the diameter of propulsor and the 360-degree turn of azimuth thruster about its axes with no contact to ship's propulsors is provided. In DWL area, the ship's stern overhang is of wedge-type icebreaking shape with 90 DEG-180 DEG wedge angle along the DWL with its surface being inclined at no less than 30 DEG to the vertical. An ice protection shield with wedge-shape cross section does not protrude beyond the ship's hull and is formed so as to extend in the bow direction beyond the disks plane of ship's side propulsors by the value not greater than two diameters of the above-mentioned propulsors; moreover, it has height at which the lower edge of the shield in the stern protrudes upwards from the rotation axes of AZT propellers at least by half the radius of these propellers. The proposed ship intended for operation in shallow freezing water offers improved maneuverability and icegoing capabilities comparing preferably with prototype.

The invention relates to an ice-breaker, in particular to the novel efficient ice-breaker. The novel efficient ice-breaker comprises a front ice breaking frame, a steel wire, a first servo motor, a vertical frame, a horizontal frame, rear rice knifes, a spiral propeller, an ice-breaker body, broadening boards, side ice breaking devices, a lower ice breaking device, an upper ice breaking device, aguiding shaft and hydraulic cylinders. The novel efficient ice-breaker has the advantages that by means of arrangement modes of a central hammerhead and three outer hammerheads of the front ice breaking frame, the transverse and longitudinal ice breaking areas of the front ice breaking frame in an advancing process of the ice-breaker can be increased; the front ice breaking frame breaks ice in advance, which is beneficial to lower the difficulty of subsequent ice breaking of the side ice breaking devices, the lower ice breaking device and the upper ice breaking device; the upper ice breaking device can saw the upper portion of an ice layer, the lower ice breaking device can saw the lower portion of the ice layer, and the cooperative action of a second ice breaking hammer and an ice breaking hammer on the lower ice breaking device is additionally provided, so that the ice breaking efficiency is greatly improved; a piston rod of each hydraulic cylinder pushes and pulls a corresponding rotating part back and forth, so that the corresponding rotating part continuously keeps away from or gets close to the ice-breaker body around a corresponding pin, damage to the ice-breaker body of crushed ice is reduced, and a navigation channel is broadened.

The present invention relates to an icebreaking vessel, which includes a hull with a bottom (2), a bow part (3) and a stern part (4). The bow part (3) includes a forward inclined upper bow portion (31), a bulbous lower bow portion (33), and an intermediate bow portion (32). The vessel is designed with a construction water line (W1), an upper ice water line (W3) and a lower ice water line (W2). In order to improve the icebreaking capacity of the vessel, an upper surface of the bulbous lower bow portion (33) is arranged to be at or in the vicinity of the water surface when the vessel operates at the construction water line (W1) of the vessel. When the vessel operates at the lower ice water line (W2), a lower surface of the bulbous lower bow portion (33) is arranged to penetrate the water surface. When the vessel operates at the upper ice water line (W3), the forward inclined upper bow portion (31) is arranged to penetrate the water surface. The present invention also relates to a method for operating the icebreaking vessel.