BUOYANCY DEVICE OF RISER AND LNG FPSO SHIP HAVING THE SAME

• Main Authors: YOO, KWANG KYU, KIM, DAE JUNG
• Format: Patent
• Language: English; Korean
• Published: 07.04.2016
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRICITY; EQUIPMENT FOR SHIPPING; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES; FIXED CONSTRUCTIONS; FIXED-CAPACITY GAS-HOLDERS; HEATING; INDUCTANCES; LIGHTING; MAGNETS; MECHANICAL ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PERFORMING OPERATIONS; RELATED EQUIPMENT; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SHIPS OR OTHER WATERBORNE VESSELS; STORING OF DISTRIBUTING GASES OR LIQUIDS; TRANSFORMERS; TRANSPORTING; VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES; WEAPONS

A buoyancy device of a riser and an LNG FPSO ship using the same include: the riser where one end lifted from the ocean floor is connected to a connection part of a hull, and a number of first electromagnets are arranged continuously to have different polarities in a vertical direction on the outer circumference; a buoyancy material which is combined to the outer circumference of the riser, and has a number of second electromagnets continuously arranged corresponding to the first electromagnet to have different polarities in the vertical direction on the inner circumference; and a power supply part which inverts the direction of a current delivered to one direction of the first electromagnets continuously and then moves the second electromagnet along the riser, and then attaches the first electromagnets to a fixed section of the second electromagnets by generating repulsive force using flow of the current only. The buoyancy device of the riser can prevent accumulation of floating matters on a curved section or damage to the curved section even in case the riser is curved excessively. 본 발명에 따른 라이저의 부력장치 및 이를 이용한 LNG FPSO선은, 해저에서 리프팅된 일단이 선체의 연결부에 결합되며, 외주에는 종 방향을 따라 서로 다른 극성을 갖도록 다수의 제1전자석이 연속적으로 배열되는 라이저와, 상기 라이저의 외주에 결합되며, 내주에는 종 방향을 따라 서로 다른 극성을 갖도록 상기 제1전자석과 대응되는 다수의 제2전자석이 연속적으로 배열되는 부력재 및, 상기 제1전자석들의 일 방향으로 전달시킨 전류의 방향을 연속적으로 반전시켜 상기 제2전자석이 상기 라이저를 따라 이동시킨 후, 전류의 흐름만을 이용해 척력을 발생시켜 상기 제1전자석들을 상기 제2전자석들의 고정구간에 부착시키는 전원 공급부를 포함한다.