Ultra-large floating production storage and offloading (FPSO) ship closure process

Abstract

The invention relates to an ultra-large FPSO ship closure process. The ultra-large FPSO ship closure process comprises the following steps that S1, a first ship body section and a second ship body section are manufactured and formed; s2, the first ship body section and the second ship body section are dragged into the folding dock in sequence, and then the folding dock is emptied so that the first ship body section and the second ship body section can both be fixed to the sitting pier assembly; then, the relative positions of the first ship body section and the second ship body section are finely adjusted until the pre-welded joints are accurately aligned; and S3, tailor welding of the first ship body section and the second ship body section is completed. Therefore, on one hand, the first ship body section and the second ship body section can be synchronously built in the two small docks respectively, so that the construction period is greatly shortened; and on the other hand, in the folding welding stage, the first ship body section and the second ship body section are kept in the jacked state all the time, and guiding of the connector position can be rapidly and accurately achieved in a traction mode before formal welding.

Description

technical field [0001] The invention relates to the technical field of shipbuilding, in particular to a super-large FPSO ship closing process. Background technique [0002] The super-large FPSO ship is the latest construction project of COSCO SHIPPING Group. The planned berthing port is located in Mauritania. The scale of the production facility on the super-large FPSO ship will reach 5 million cubic feet per day, which will have various functions such as fluid reception, gas / liquid separation, gas processing, and condensate removal. [0003] In the prior art, the construction method of large ships is as follows: a plurality of hulls are segmented in a large dock and directly welded in sequence according to the construction blueprint. The sequential tailor welding of each hull segment and the formed half hull is carried out until the overall construction of the large hull is completed. Although this technical solution solves the design concept of using a small dock to buil...

AI Technical Summary

Problems solved by technology

Although this technical solution solves the design concept of using a small dock to build a large ship, there are still the following problems in the actual construction: 1) Because the traditional hull adopts a segment-by-section welding method (the rear segment can only be executed after the front segment of the hull is loaded). Hull carrying work), resulting in very slow overall construction progress of the hull, and a long construction period; 2) During the construction process, because the hull sections are always in a floating state, it is extremely difficult to align the interface, and it is difficult to ensure the final shape of the hull quality

Moreover, in the actual construction process, it is necessary to repeat the quality inspection and confirmation of the design indicators such as the straightness and deflection of the hull many times, resulting in a large waste of manpower and material resources for quality inspection.

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