Device and method for offshore installation and maintenance of telescopic column of dry tree semi-submersible platform

Abstract

The invention discloses a device and method for offshore installation and maintenance of a telescopic column on a dry tree semi-submersible platform, comprising a guide rail bearing system, a main structure of the device, a traction system and a hydraulic lifting system; Multiple guide rail systems, the main structure of the device can be transferred between multiple columns, and can slide on the guide rail system of each column; the traction system is used to lift the telescopic column from the lower part of the column to the hydraulic lifting system place; hydraulic lifting system, including lifting frame, upper clamp assembly, lower clamp assembly and hydraulic telescopic mechanism; there is a shuttle channel in the middle of the lifting frame, the upper clamp assembly is fixed on the inner top of the lifting frame, and the lower clamp assembly slides Installed on the lifting frame; the hydraulic telescopic mechanism is set on the inner bottom of the lifting frame and connected with the lower clamp assembly. The upper clamp assembly and the lower clamp assembly are used to alternately clamp or release the telescopic column when the telescopic column passes through the shuttle channel. column.

Description

technical field [0001] The present invention relates to a dry tree semi-submersible platform telescopic column offshore installation and maintenance device and its use method, in particular to a deep-water floating multifunctional dry tree semi-submersible platform telescopic column offshore installation and maintenance device and its use method , which belongs to the technical field of deep-water offshore oil and gas development. Background technique [0002] Deep-water floating platforms are the main equipment for deep-water offshore oil and gas development. Semi-submersible platforms have obvious advantages in terms of construction, installation and economy compared with single-column platforms and tension-leg platforms. However, the heave motion performance of the conventional semi-submersible platform is poor. As a deepwater oil and gas development and production platform, a wet tree must be used, and the wet tree technology is complicated and expensive. The dry tree h...

AI Technical Summary

Problems solved by technology

However, the heave motion performance of the conventional semi-submersible platform is poor. As a deepwater oil and gas development and production platform, a wet tree must be used, and the wet tree technology is complex and expensive.

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