Segmentation dividing method of cylindrical deep sea drilling platform basement built based on semi-submersible barge

Abstract

The invention relates to the field of marine engineering equipment, in particular to a segmentation dividing method of a cylindrical deep sea drilling oil storage platform basement built based on a semi-submersible barge. The method includes that: the cylindrical deep sea drilling oil storage platform basement is symmetrically and equally divided into N sector-shaped columns in the circumferential direction from top to bottom, and N is an integer; each sector-shaped column is divided into N quadrilateral columns from top to bottom in the direction of the radius of each sector-shaped column, N is an integer and the dividing standard is that top-to-bottom projection areas of the quadrilateral columns are identical; and each quadrilateral column is one segment of the cylindrical deep sea drilling oil storage platform basement. The segmentation dividing method enables the total number of segments of the basement to be the minimum, reduces segment hoisting times and improves the segment building efficiency of the cylindrical deep sea drilling oil storage platform basement. Straight-line welding joints are reserved between the segments, worker construction is fast, deformation of the welding joints can be controlled easily, and the segmentation dividing method improves economic benefit of plants compared with arc welding joints due to the fact that no special welding devices are needed.

Description

[0001] Field [0002] The invention relates to the field of marine engineering equipment, in particular to a method for segmenting the bottom layer of a cylindrical deep-sea drilling oil storage platform built on the basis of a semi-submersible barge. technical background [0003] Cylindrical deep-sea drilling and oil storage platforms, such as the SEVAN Driller produced by Nantong COSCO Shipping Co., Ltd., are manufactured using the method of "layer-by-layer manufacturing and layer-by-layer stacking". When manufacturing the bottom layer of this type of drilling platform, each segment is prefabricated first, and then each segment is hoisted to the semi-submerged barge, and then each segment is welded into a whole, thus forming the bottom layer of the drilling platform. The semi-submerged barge is removed, and the bottom layer is used as the manufacturing platform to complete the construction of the entire drilling platform. [0004] When dividing the bottom section of the pla...

AI Technical Summary

Problems solved by technology

[0004] When dividing the bottom section of the platform, since the construction platform is a semi-submerged barge, it is necessary to comprehensively consider the width of the semi-submerged barge, the single maximum lifting capacity of the gantry crane in the manufacturing plant, the cylindrical drilling oil space, and the quality of the projected area per unit of the section and other practical constraints, there is no similar segment division method in literature and patents, and a special segment division method needs to be customized to meet the actual needs of the bottom layer of a cylindrical deep-sea drilling oil storage platform built on a semi-submersible barge

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