Semi-submersible support platform and positioning method thereof

Abstract

A semi-submersible support platform and a positioning method thereof are disclosed. The semi-submersible support platform, used for operations at sea after sailed to a certain position of a sea surface, includes an upper deck and a lower pontoon. The upper deck and the lower pontoon are connected by a plurality of upright columns. Each upright column is provided with a support leg that is longitudinally inserted through the upright column. The lower pontoon has a plurality of chambers for receiving water therein. The support leg has a compartment for receiving water therein. Each upright column includes a leveling mechanism therein. When the support leg sinks to reach the seabed, the leveling mechanism in each upright column is combined with the support leg to support the support leg. The leveling mechanism can drive the upper deck to move up or down along the support leg.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a support platform for operations at sea, and more particularly to a semi-submersible support platform and a positioning method thereof.BACKGROUND OF THE INVENTION[0002]For hanging operation at sea, there is a platform that can be used on the sea. After the platform is sailed to a certain position, it can be used for hanging operation at sea. In order to maintain stability during the hanging operation, especially to avoid vertical fluctuations caused by wind and waves on the platform, a positioning means is used for positioning the platform on the sea surface, which is conducive to the stability and safety of the hanging operation.[0003]For example, U.S. Pat. No. 5,759,481 B1 and No. 7,815,398 B2 disclose a platform for operations at sea. A deck is provided with a plurality of legs. When the platform is sailed to a certain position, the legs are driven to move down to reach the seabed. The deck is lifted above the sea surf...

AI Technical Summary

Benefits of technology

The present invention is about a way to position a platform in the sea using support legs and a lower pontoon filled with seawater. This method is cost-effective and stable. The technical effect of this invention is to provide a reliable and economical way to position a platform in the sea.

Problems solved by technology

The problem of the sinking of the platform caused by the waves will cause the instability of the height of the platform, which is unfavorable for operations at sea.

Such a platform has the problems of heavy load and slow speed.

However, it has been found in practice that even if the center of gravity of the platform is moved down toward the sea surface and the platform is tightened by the cables or steel cable, the platform is still be vertically floating due to wind and waves, which will inevitably lead to instability during operations at sea.

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