Construction program of semi-submersible platform for offshore oil and gas development

Abstract

The invention discloses a construction program of a semi-submersible platform for offshore oil and gas development, and comprises the following steps: preparing parts, making an upgrade support, and folding a pontoon and a column into a lower part structure; a plurality of elevating brackets are arranged on the exterior of two sides in the longitudinal direction of a main deck, a plurality of elevating brackets are arranged on the hollow position of two sides in the longitudinal direction of the main deck, a lower elevating lifting point is arranged on a position which corresponds to strong structure of the close lower part of the main deck under the elevating brackets of the interior and the exterior, a elevating beam on the top part of the elevating bracket is provided with pressure synchronous elevating equipment which is connected with lower elevating lifting point on the main deck so as to carry out the overall hydraulic synchronizing elevating and lifting on the main deck, the lower part structure of the main deck is moved under thereof to be in place, and the pressure synchronous lifting equipment slowly lowers to enable the main deck to be located on the lower part structure and to be welded and provided with a tube support structure. The invention has simple operation, time saving and energy saving and improved working efficiency.

Description

Technical field: [0001] The invention relates to a construction scheme of an offshore oil and gas development device, in particular to a construction scheme of a semi-submersible platform for offshore oil and gas development. Background technique: [0002] As the onshore oil reserves are declining, more and more countries have begun to focus on the exploitation of offshore oil, and the market demand for offshore oil rigs will also increase. The upper hull part is the main deck, and the lower hull part is composed of two pontoon bridges and four columns. Each pontoon bridge is equipped with two columns. Currently, there are two methods for constructing this type of semi-submersible platform: one is to use segmented loading In this, the construction speed is slow, the completeness of the mechanical completion is poor, and the work efficiency is relatively low; the other is to make the most of the site resources and speed up the project progress. The lower hull and the upper hull ar...

AI Technical Summary

Problems solved by technology

The upper hull part is the main deck, and the lower hull part is composed of two pontoons and four columns, and each pontoon is equipped with two columns. At present, there are two ways to build this type of semi-submersible platform: one is to adopt segmented loading , the construction speed is slow, the integrity of the mechanical completion is poor, and the work efficiency is relatively low; the other is to maximize the use of site resources and speed up the project progress. The lower hull and the upper hull are manufactured separately and at the same time. When they are completed to the maximum, adopt The 20,000-ton gantry crane lifts the upper hull to the lower hull as a whole, which requires a large one-time investment, increases construction costs, and wastes resources

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