Abstract:
A mid-depth buoyancy tank system for supporting a riser is disclosed. The mid-depth buoyancy tank system, as a mid-depth buoyancy tank system for a riser to develop an oil field where the level of water is low, comprises a ballast tank inside; a conduit where ballast water from the ballast tank flows; a valve installed in the conduit; a pump which sucks or discharges the ballast water from the ballast tank; a mid-depth buoyancy tank equipped with a sea chest for allowing the ballast water to flow in or flow out; a tether installed in the lower part of the mid-depth buoyancy tank to support the mid-depth buoyancy tank on the seabed; and an active ballasting device which discharges the ballast water from the ballast tank to increase the buoyancy of the mid-depth buoyancy tank when the rotation of the mid-depth buoyancy tank is detected to be faster than a predetermined value of a movement measuring device installed inside the mid-depth buoyancy tank designed to detect the rotation caused by currents and waves.
Abstract:
Disclosed is a mooring line of offshore construction. The mooring line of the offshore construction comprises an anchor fixed to the seabed surface in order for a hull to be placed in the position; a chain for supporting the anchor; a chain connected to the hull; and a rope for connecting the chains. A flexible lubrication pipe covering the chain and having lubricant inside and an end cap sealed to the end of the flexible lubrication pipe to seal the lubricant in the flexible lubrication pipe are included.
Abstract:
PURPOSE: A mining ship and an operational method thereof are provided to shorten mineral transportation schedule by minimizing the stop time of a mineral lifting work. CONSTITUTION: A mineral ship comprises a ship body(1), a mining device, a mineral lifting device(4), a detachable cargo hold(9), and a mooring device(8). The mining device mines minerals on the seabed under a ship. The mineral lifting device lifts up the mined minerals to the ship. The detachable cargo hold stores the minerals lifted by the mineral lifting device. The mooring device moors the detachable cargo hold to the ship and is positioned in a stern or a stem of the ship.
Abstract:
본 발명은 해상 풍력 발전기의 하부 구조물에 대해 상부 구조물을 조립함에 있어 해양 환경에 의해 변화하는 설치선박의 6 자유도 모션을 흡수할 수 있도록 하여 해상 풍력 발전기의 설치작업이 설치해역의 해양 환경과 수심 등에 따라 영향을 받지 않도록 함과 더불어 설치에 소요되는 비용과 시간을 줄여 작업의 효율을 향상시킬 수 있도록 하는 데 그 목적이 있다. 전술한 목적을 달성하기 위한 본 발명은, 풍력 발전기용 상부 구조물(3)과 하부 구조물(5)에 대한 위치 정보를 각각 검출하는 위치 검출부와, 선체의 거동 자세 변화를 검출하는 6 자유도 검출부(8), 선체의 위치 및 방향을 조정하기 위한 자항 설비부(9), 선체의 6 자유도 모션을 흡수하여 상기 하부 구조물(5)에 대한 상기 상부 구조물(3)의 위치를 선체의 거동 자세와 무관하게 일치시키는 위치 조정부(4) 및, 상기 위치 검출부와 상기 6 자유도 검출부(8)로부터 각각 검출되는 정보를 매개로 상기 위치 조정부(4)와 상기 자항 설비부(9)의 동작을 각각 제어하는 제어부(13)를 구비한다.
Abstract:
PURPOSE: A method for unloading liquid goods from a floating structure with an intermediate loading tank is provided to reduce the time of exposing a general membrane tank to an intermediate loading condition. CONSTITUTION: Liquid goods stored in an intermediate loading tank(1) are unloaded to the outside of a floating structure. Liquid goods stored in a general membrane tank(3) except for the intermediate loading tank are transferred to the intermediate loading tank. The liquid goods transferred from the general membrane tank to the intermediate loading tank are unloaded to the outside of the floating structure. The intermediate loading tank has a structure of bearing a sloshing impact even in an intermediate loading condition.
Abstract:
Disclosed is a mooring system of a mining ship. The mooring system includes a cargo hold storage provided in a hull to accommodate detachable cargo hold, and an electromagnet unit installed on the cargo hold storage to detachably connect the detachable cargo hold to the hull. Since the electromagnet unit is installed on the hull to moor the detachable cargo hold, the mooring system can control the six degree of freedom motion of the ship at once, can remarkably reduce the berthing time and the deberthing time, and can minimize manpower input required for the berthing. If the detachable cargo hold is inserted in the cargo hold storage, the electromagnet unit is withdrawn from the hull, thereby effectively preventing damage caused by the collision between the electromagnet unit and the detachable cargo hold.
Abstract:
PURPOSE: A movable port is provided to promote the more effective marine transportation and operation of harbor facilities by loading and unloading cargos in a sea area away from harbor facilities located on land, to exclude the work for controlling the quantity of water in a ballast tank by keeping the submerged depth in the seawater regularly regardless of the amount of cargos loaded and securing the required draft, and to prevent the disturbance and contamination of a marine ecosystem. CONSTITUTION: A movable port comprises a main platform(10) having transportation equipment(12) for loading and unloading cargos(3) and a mooring portion(14) for mooring an external vessel(1), and a sub platform(20) mooring to the main platform and having a non-watertight space for allowing seawater to enter and leave, wherein a basket type loading box(7) is installed to the non-watertight space to be separable to load the cargos within.
Abstract:
PURPOSE: A tension adjusting device and a tension control system of the tendon at a TLP(tesnioned leg platform) are provided to control tension in real time by the selection of remote controllable equipment and to reduce manufacturing/working cost by the minimizing of the number of installation positions of an existing ballast system and a pump system. CONSTITUTION: A tension adjusting device of the tendon at a TLP(tesnioned leg platform) comprises a motor(M) and a tendon tension adjusting unit(240). The motor generates forward or backward rotating movement depending on a signal. The tendon tension adjusting unit is installed on the end of the tendon. The tendon tension adjusting unit converts forward and backward rotation by the motor to translating movement to vary the tension of the tendon. The tendon tension adjusting unit controls the length of the tendon by raising or lowering the tendon by the translating movement using a screw jack. The tendon tension adjusting unit controls the length of the tendon by raising or lowering the tendon by the translating movement using a turn buckle.