Device for reducing fluid oscillation in moon pool in sailing of drilling ship

Abstract

The invention discloses a device for reducing fluid oscillation in a moon pool in sailing of a drilling ship. The device comprises a first damping box and a second damping box, wherein the first damping box and the second damping box are arranged at the bottom of the moon pool; one end of each of the first damping box and the second damping box is hinged to the inner wall of the moon pool; the other ends of the first damping box and the second damping box are both circular arc-shaped; when the first damping box and the second damping box are horizontal, the bottom of the moon pool can be sealed by the first damping box and the second damping box; the first damping box and the second damping box are respectively connected with a driving device; the driving device is used for driving the first damping box and the second damping box to rotate around the inner wall of the moon pool. By adoption of the device for reducing fluid oscillation in the moon pool in sailing of the drilling ship, vortexes caused by sudden structure change when fluid flows through the bottom of the moon pool with a large opening can be well reduced by virtue of the damping boxes, impact of the vortexes to the inner wall of the moon pool can be weakened, ship shaking can be reduced, and ship sailing resistance can be reduced.

Description

Technical field [0001] The invention relates to a device for reducing fluid vibration in a moon pool when a drilling ship is sailing, and belongs to the technical field of ships and ocean engineering. Background technique [0002] Drilling ships play an important role in offshore engineering and offshore oil development. Different from the conventional ship type, the drilling ship has a moon pool structure that penetrates the hull near the midship. The structure of the moon pond brings many unfavorable factors to the structural strength of the hull. Since the moon pond is connected to the ocean, the seawater inside the moon pond is affected by the external marine environment. Under the action of wind, waves and currents, the fluid in the moon pool has two oscillation phenomena, "piston" and "sloshing". The fluid oscillation in the moon pond damages the hull structure, deteriorates the working and resting environment of the crew, and reduces work efficiency. At the same time, th...

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Problems solved by technology

However, these measures did not effectively improve the impact of the structural mutation at the bottom of the moon pool, and did not significantly weaken the heaving motion of the fluid.

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