Hoisting method for deep water large-scale jacket construction on land

Abstract

The invention relates to a hoisting method for deep water large-scale jacket construction on land, comprising the following steps: (1) putting a plurality of temporary supports along the two sides of a sliding way; (2) hoisting conduits on a sliding boot and the temporary supports at the two sides of the sliding way;(3) hoisting a plurality of tiepieces between the temporary supports at the two sides of the sliding way and the two conduits; (4) installing a first layer of horizontal pieces and the tiepieces from one end of an uniwafer therein; (5) and (6) successively installing a plurality layers of laminates between the horizontal pieces and the plurality of the tiepieces; (7) carrying out 90 degree turning over of hoisting operation on a combined-piece by taking the conduit on the combined-piece as a rotating shaft and the conduit at the other side as a suspension point shaft; and (8) carrying out 90 degree of hoisting operation on the uniwafer at the other side by taking the conduit on the uniwafer at the other side as the rotating shaft and the conduit at the other side as the suspension point shaft, and folding with the combined-piece to integrate the uniwafer and the combined-piece(109) into a whole. By using the method, superaltitude hoisting operation quantities are reduced by 50%, and the safety of the hoisting operation is increased. Most of operations are carried out at low altitude, thereby lowering the risk of hoisting.

Description

technical field [0001] The invention relates to a hoisting method, in particular to a hoisting method suitable for land construction of a deep-water large-scale jacket that is high, large, heavy, complex in structure, and high in quality requirements, and 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. Platforms generally include: offshore engineering blocks, underwater support structures - jackets, single points and other offshore engineering structures. These steel structure marine engineering structures are generally prefabricated on land first, and then transported to sea for assembly. [0003] As my country's offshore oil development continues to move towards the deep water field, large deep water jackets have been used more and more widely. [0004] At present, the water...

AI Technical Summary

Problems solved by technology

[0020] 2. The eighth and ninth steps adopt the hoisting form of the buckle. Due to the limitation of the capacity of the hoisting equipment, the top vertical piece needs to be divided into two to three parts for hoisting separately. The structure is scattered and all are assembled at high altitude. Unfavorable dimensional accuracy;

[0021] 3. In the eighth and ninth steps, the pipes of the top vertical piece and the adjacent tie bars at the bottom need to be assembled and welded at super high altitudes. A large number of super high altitude assembled and welded workloads increase the construction cost. dangerous;

[0022] 4. Due to the limitation of equipment and space in the eighth and ninth steps, the assembly and welding operations at high altitude are more difficult than at low altitude, and the construction quality is not easy to control;

[0023] 5. During the hoisting operation of the top vertical piece in the eighth and ninth steps, the suspended structure needs to cross a large number of structures below it from front to back at high altitude, and the risk factor increases

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