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Construction method for self-elevating drilling platform cantilever beam main beam

A drilling platform and construction method technology, applied in construction, water conservancy projects, artificial islands, etc., can solve the problem that the precision control is not well solved, and achieve the effects of shortening the construction period, reducing risks, and controlling deformation

Active Publication Date: 2018-09-04
NANTONG ZHENHUA HEAVY EQUIP MFG
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  • Application Information

AI Technical Summary

Problems solved by technology

The installation accuracy is extremely high. The cantilever beam main beam is used as the cantilever beam foundation structure, requiring a total length of 56.5m. The width tolerance of the lower panels of the cantilever beams A and B beams is +1.6 / -0.8mm, and the warpage of the lower panels in the width direction is ±1.6mm. The precision control of this kind of steel structure construction has not been well solved in China

Method used

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  • Construction method for self-elevating drilling platform cantilever beam main beam

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Embodiment 1

[0045] A method for constructing a cantilever beam main beam structure of a jack-up drilling platform, such as figure 1 As shown, the main girder of the cantilever beam is mainly composed of upper flange 1, web 2, lower flange 3, inclined V-plate 4, triangular bracket 5, inner large rib 6, inner small rib 7, outer rib 8 and Outer reinforcing rib 9 forms. After the parts are unloaded, the groove is processed first, and then the plates are spliced, and the T row is prefabricated. The upper and lower T rows are combined to form an I-beam, and the inner and outer ribs are welded to complete the cantilever beam main beam. The main steps are as follows (taking a main beam as an example):

[0046] 1. Splicing of the upper and lower wings of the main beam: the upper wing is divided into 7 parts for CNC blanking, of which parts 11 and 12 are 51mm thick and made of EH36, and the rest of the parts are 76mm thick and made of EQ63. The lower wing plate is divided into 7 parts for CNC bla...

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Abstract

The invention discloses a construction method for a self-elevating drilling platform cantilever beam main beam. The self-elevating drilling platform cantilever beam main beam is constructed through the steps of material preparation, upper-lower wing plate butt joint, web splicing, inclined-V plate splicing, T-row fabrication and T-row folding. By means of the construction process, the problem thatthe deformation of a single part is large due to the fact that a narrow-strip-shaped groove is cut through flames is solved; structure assembling and welding are relatively dispersed, assembly line work is adopted, and reasonable arrangement of workshops is facilitated; meanwhile, deformation can be effectively controlled; main beam folding is performed on a horizontal jig frame, work high abovethe ground is avoided, and risks are further lowered; and after a component is segmented, synchronous construction can be realized, the construction cycle is shortened, and production efficiency is improved.

Description

technical field [0001] The invention relates to a construction method of a main beam, in particular to a construction method of a cantilever beam main beam of a self-elevating drilling platform. Background technique [0002] With the development of society and the advancement of science and technology, oil and gas exploration and development have turned to the ocean. The offshore platform is the basic facility for the development of offshore oil and gas resources, and the base for offshore production and living. It provides a place for offshore operations and living for the development and utilization of marine resources. As the key structure of the drilling platform, the cantilever beam improves the drilling quantity, drilling efficiency and flexibility of the drilling operation of the platform. The installation accuracy is extremely high. The cantilever beam main beam is used as the cantilever beam foundation structure, requiring a total length of 56.5m. The width toleran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B17/00
CPCE02B17/00E02B2017/0039
Inventor 曹凤丽吴正峰林海桥
Owner NANTONG ZHENHUA HEAVY EQUIP MFG
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