Method for dismantling discarded jacket through air bags

Abstract

A method for dismantling a discarded jacket through air bags comprises the following steps: 1, dismantling preparation is performed on the discarded jacket; 2, a plurality of air bag groups are lowered into water and are connected to form a whole air bag floating aiding unit; 3, the air bag floating aiding unit and a local control panel arranged at the top of the discarded jacket are connected, so that the remote control panel can realize controlling and monitoring functions; 4, the air bag floating aiding unit is inflated to be in a pressure maintaining state; 5, a workboat is connected with the discarded jacket and tows the discarded jacket away from the site. The method has the advantages that the dismantling efficiency can be improved greatly and the dismantling cost is reduced; the offshore construction risks are reduced; meanwhile, the completeness of the discarded jacket can be kept, the construction risks caused by jacket disassembly are reduced, and the air bags are recyclable, so that the engineering cost can be reduced substantially.

Description

technical field [0001] The invention relates to the dismantling of an offshore platform jacket, in particular to a method for removing an abandoned jacket by using an air bag. It belongs to the field of offshore oil engineering. Background technique [0002] In order to avoid damage to the marine environment or affect the exploitation of marine resources, according to international conventions and relevant domestic regulations, oil and gas fields must be dismantled and relocated within one year of shutdown. [0003] At present, there are nearly 10,000 offshore oil platforms of various forms in the world. With the end of the service period of these platforms, more and more platforms will enter the abandonment stage. In the next few decades, offshore oil platforms will inevitably be dismantled. peak period. [0004] The dismantling of the abandoned platform is mainly divided into: the first is: the dismantling of the upper block structure; the second is: the dismantling of t...

AI Technical Summary

Problems solved by technology

Therefore, this sudden change of load is very dangerous to the structure of the floating hook, and it is likely to cause structural damage to the floating hook

At the same time, since the adsorption force of the mud cannot be determined, it will be difficult for the constructor to pre-select a suitable floating crane with lifting capacity.

Therefore, this phenomenon often forces the constructor to choose a floating crane that is larger than the actual demand, resulting in some unnecessary increase in engineering costs.

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