U-shaped offshore engineering installation vessel and jacket topside module installation method

Abstract

The invention belongs to the technical field of ocean engineering and relates to a U-shaped ocean engineering installation ship which is used for installing a module on the upper portion of a conduit frame. A ship body (1) of the installation ship comprises a stern U-shaped groove part (2) and a bow midship part (3), a deck of the ship body (1) is provided with a sliding rail (4) penetrating the head and the tail of the ship body (1), and a fender device (5) is fixed on the inner side of the stern U-shaped groove part (2). The invention relates to a method for using the installation ship to install the module on the upper portion of the conduit frame. The installation ship is good in stability, high in wind wave resistance and suitable for external float towing installation of the large module on the conduit frame.

Description

Technical field [0001] The invention belongs to the technical field of ocean engineering and relates to an ocean engineering installation ship. Background technique [0002] At present, there are two ways to install the upper module of the jacket: the floating lifting method and the internal floating dragging method. The lifting capacity of a crane using the floating crane method is generally below 7,500 tons, and the blocks whose weight exceeds the lifting capacity need to be installed by block hoisting, which greatly increases the workload of offshore construction and the difficulty of project coordination ; The internal floating towing method uses a "T" type installation ship for block installation. This method can solve the problem of insufficient lifting capacity of the crane ship to a certain extent. In the method of installation, the width of the bow is reduced so that the bow can be inserted between the main pipes of the jacket for block installation. The main disad...

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Problems solved by technology

The lifting capacity of the floating crane is generally less than 7,500 tons. For the blocks whose weight exceeds the lifting capacity, they need to be installed in separate hoisting methods, which greatly increases the workload of offshore construction and the difficulty of project coordination. ; The internal floating towing method uses a "T" type installation ship for block installation. This method can solve the problem of insufficient lifting capacity of the crane ship to a certain extent, but the internal floating towing method limits the size of the ship's width. The width of the bow of the installation method is reduced so that the bow can be inserted between the main pipes of the jacket for block installation. The main disadvantage of this type of ship is that it has poor wind and wave resistance, especially in the case of long-period swells. The ship moves violently The movement amplitude is large, it is difficult to implement offshore installation, the risk of the block installation process is high, and higher requirements are put forward for the environmental conditions that can be constructed, and it is difficult to select the operating weather window

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