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Platform moon pool damping device

A drag reduction device and platform technology, which are used in devices to reduce the influence of resistance of marine engineering structures, devices for sloshing and eddies, and in the field of reducing the liquid level oscillation of the moonpool of the drilling platform under different working conditions, and can solve the problem of increasing the tightness. requirements, inconvenience of operation, environmental impact of marine work and rest, etc., to achieve the effect of curbing vortex reaction, reducing viscous resistance, and reducing sloshing effect

Inactive Publication Date: 2016-03-23
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the inner wall of the moon pool at the bottom of the platform is in direct contact with the incoming waves, the vortex generated at the front of the moon pool is transported to the rear end, and when it hits the back wall of the moon pool, it is blocked and sent back to the inside of the moon pool, causing the fluid in the moon pool to roll, and the back wall of the moon pool The pressure on the front wall is higher, thus generating resistance; at the same time, under the action of wind, waves and currents, the free liquid surface in the moon pool will form an up and down "piston" movement along the depth direction of the moon pool and a "sloshing" movement in the horizontal direction, which will affect the inner surface of the moon pool. impact on the wall and deck, which affects the movement posture of the main body of the platform in seawater, and has a serious impact on the working and resting environment at sea
[0003] At present, in order to cope with the adverse effects of the moon pool, it is generally used to add appendages on the inner wall or bottom of the moon pool and to add movable panels that can be opened and closed in the moon pool. These measures can reduce part of the resistance to a certain extent, but due to the When working at sea, it is necessary to deal with the influence of resistance under different working conditions. The existing technical solutions cannot fully meet the requirements of drag reduction for the moon pool structure. Moreover, for movable opening and closing plates, hydraulic cylinder push-pull methods are generally used to drive the plates. Movement, the hydraulic cylinder device is susceptible to seawater immersion corrosion, which increases the airtightness requirements and also brings a lot of inconvenience in operation

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with drawings and embodiments.

[0023] Such as Figure 1~Figure 6 As shown, this embodiment includes a vibration damping cabin 1 and a sloshing cabin 2 arranged vertically on the lateral inner walls 10 at both ends of the moon pool. The vibration damping cabin 1 and the sloshing cabin 2 are separated by a watertight partition 3 . The outer wall 11 of the damping cabin and the lower outer wall 21 of the sloshing cabin are respectively horizontally placed with several rows of staggered damping blocks 4, the outer wall 21 of the lower part of the sloshing cabin is fixedly connected with four wave-blocking columns 5 with the same width as the moon pool, above the middle of the sloshing cabin There is no vertical outer wall, and three-layer partitions 22 are arranged up and down in the sloshing reduction cabin 2. Eight rows of vertical wave-dissipating blocks 6 are placed horizontally on the upper and lowe...

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Abstract

The invention discloses a platform moon pool damping device which comprises a shock absorption cabin and a shake absorption cabin which are arranged on the transverse inner walls at the two ends of a moon pool and separated through a watertight separation board. Multiple rows of damping blocks distributed in a staggered manner are transversely arranged on the outer wall of the shock absorption cabin and the outer wall of the lower portion of the shake absorption cabin respectively. Multiple wave stop columns are arranged on the outer wall of the lower portion of the shake absorption cabin. Three separation boards are arranged in the shake absorption cabin from top to bottom. Multiple rows of vertical wave elimination blocks horizontally distributed in a staggered manner are transversely arranged on the upper sides and the lower sides of the separation boards and the inner wall of the shake absorption cabin bottom. The separation boards are provided with vertically-corresponding wedge blocks towards the outer end of the platform moon pool. Multiple rectangular openings are formed in the shock absorption cabin outer wall and a vertical wall board of the shock absorption cabin respectively. Multiple rows of horizontal wave elimination blocks vertically distributed in a staggered manner are transversely arranged on the inner walls of the two longitudinal ends and a vertical wall board of the moon pool. The shock absorption cabin and the shake absorption cabin can guarantee that a platform works safely and stably under different working conditions. The wave stop columns arranged on the outer wall of the lower portion of the shake absorption cabin can effectively resist incoming flow impact, the kinetic energy of waves is weakened, incoming flow is inducted to move towards the bottom of the moon pool, and formed vortexes in the moon pool are reduced.

Description

technical field [0001] The invention relates to a device for reducing the influence of resistance of marine engineering structures, in particular to a device for reducing liquid surface oscillation, sloshing and vortices of a drilling platform moon pool under different working conditions, and belongs to the technical field of ships and marine engineering. Background technique [0002] With the increase of human demand for oil and natural gas energy, the development of land resources can no longer meet the existing oil supply. Offshore oil exploration and development are urgently needed. Various new types of marine equipment are constantly emerging under this new situation. As the main product of offshore drilling equipment, the drilling platform is also constantly developing and innovating. Moon pool, as an indispensable structural form of offshore drilling platform, is generally located in the middle of the platform. Its structure is a vertical channel from the upper splint...

Claims

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Application Information

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IPC IPC(8): B63B35/44
CPCB63B35/4413
Inventor 谷家扬章培蒋志勇姚震球黄祥宏
Owner JIANGSU UNIV OF SCI & TECH
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