Combining process for topside structures and hull structures of tension leg platforms

Abstract

The invention provides a combining process for topside structures and hull structures of tension leg platforms. The process includes the following steps that firstly, after bearing sliding ways are laid on a general assembly platform of a dock, topsides of the tension leg platforms are established on the bearing sliding ways, and hulls are established in the dock; secondly, bearing trusses are arranged between the tension leg platforms and the dock and first sliding ways are arranged on the bearing trusses; thirdly, second sliding ways are arranged on the tension leg platforms; fourthly, temporary connecting boxes are arranged between the hulls and the tension leg platforms; fifthly, third sliding ways are laid on the first sliding ways, the second sliding ways and the temporary connecting boxes; sixthly, each topside is moved to the portion among uprights of the corresponding hull; seventhly, the uprights are provided with hydraulic lifting devices; eighthly, the topsides are lifted to the set positions to be fixed; and ninthly, the temporary connecting boxes are dragged to a deep-water region, sunk and separated from the tension leg platforms. By the adoption of the combining process, the topsides and the hulls can be established at the same time and integrally combined, and general assembly and combination efficiency is improved; and the risks of offshore operation are reduced.

Description

technical field [0001] The invention relates to a closing process, in particular to a closing process for an upper module of a tension leg platform and a lower floating body structure, and belongs to the field of offshore oil engineering. Background technique [0002] At present, the tension leg platform is a powerful tool for developing deep-sea oil and gas resources, and its working water depth has exceeded 1,000 meters. Tension leg platform is one of the main forces of deepwater oil development, and the mastery of its construction technology plays a decisive role in our deepwater oil development strategy. The final assembly of the upper module (Topside) and the lower floating body (Hull) in the construction process of the TLP is the key technology in the construction of the TLP. [0003] The main body of the tension leg platform is divided into two parts: the upper module structure and the lower floating body structure. Usually, the upper module structure is assembled o...

AI Technical Summary

Problems solved by technology

This method needs to find a closed or semi-closed water area with sufficient water depth in the surrounding area of ​​the construction site, and requires that the wind and waves in this water area should not be too large. Barges are used to transport the upper module, and various support ships are also required, so the cost is huge, and the risk of offshore operations is relatively high, and it is greatly affected by external factors

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