Welding process for stiffener rings between topside blocks and jackets

Abstract

The invention relates to a process for welding reinforcing rings between a topside module and a jacket. The process includes the following steps: (1) one reinforcing ring serves as a unit, and welding prefabrication of the reinforcing rings and internal flange rings is carried out on the exterior of the jacket and the exterior of the topside module; when prefabrication is carried out, one reinforcing ring is divided into a plurality of arc-shaped plates, and then the multiple arc-shaped plates are spliced together to form the overall reinforcing ring; (2) the flange rings are placed on a potension meter, and are welded to the arc-shaped plates through a submerged arc welding machine to conduct pairing; (3) K-shaped notches are formed in the edges of the outer sides of the reinforcing rings, the flange rings are clamped through clamps, and then the reinforcing rings are placed into pipes to conduct pairing; (4) reputedly executing the step (1) and the step (2) until the overall welding process is completed. By means of the process, a large amount of in-pipe welding work is avoided, the operation environment of an operator is improved, and the operation safety is greatly improved. In addition, the requirement for operating skills of the operator is greatly reduced, and the construction efficiency is greatly improved.

Description

technical field [0001] The invention relates to a connection process of an upper block and a jacket, in particular to a welding process for a reinforcing ring between an upper block and a jacket. It belongs to the field of offshore oil engineering. Background technique [0002] In offshore oil development projects, various platforms such as oil production platforms, living platforms, and central processing platforms need to be built offshore. The platform generally includes: offshore steel structures such as upper blocks, underwater support structures - jackets, etc. In order to make the connection between the upper block and the lower jacket firm, a reinforcing ring is provided between the upper block and the lower jacket. [0003] Along with the enlargement of the jacket and the upper module, the jacket and the upper module are also developing in the direction of large wall thickness, dense internal structure, complex and diverse. Due to the dense internal structure of ...

AI Technical Summary

Problems solved by technology

[0005] 1. Welding molding is not good, and the pass rate is low;

[0006] 2. High requirements for workers' skill level

[0007] 3. The deposition rate per unit time is small and the welding efficiency is low

[0008] 4. Since the reinforcement rings are welded, they are generally operated in a semi-closed space, and the distance between the reinforcement rings is narrow. The workers are faced with severe tests such as smoke, dust, and high temperature. The construction environment is harsh and the safety is not high.

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