Transverse flexible supporting structure of top-tensioned vertical pipe

Abstract

The invention discloses a transverse flexible supporting structure of a top-tensioned vertical pipe. A support assembly includes: a support body, wherein the moon pool is horizontally distributed in amoon pool through which a top tension type vertical pipe on the floating platform penetrates; wherein the supporting main body is flexibly connected with the moon pool, a plurality of openings for the top tension type vertical pipes and seabed equipment to penetrate through are formed in the supporting main body, and the number and the positions of the openings correspond to the number and the positions of the top tension type vertical pipes on the floating platform; and a limiting mechanism is movably arranged on each opening, and the limiting mechanisms limit the horizontal movement of thetop tension type vertical pipes when the floating platform performs in-place operation. According to the transverse flexible supporting structure, the relative horizontal displacement of the verticalpipe and the platform can be reduced, interference and collision between the vertical pipe and the platform structure are avoided, and meanwhile the bending moment of the vertical pipe at the supporting structure can be reduced.

Description

technical field [0001] The invention relates to a support structure for suppressing the lateral free movement of a top-tensioned riser, in particular to a laterally flexible support structure for a top-tensioned riser, which belongs to the technical field of deep-water marine oil and gas development. Background technique [0002] my country's offshore oil and gas development has a history of more than 40 years, and it has gradually developed from offshore shallow water areas to far sea deep water areas. The riser system is a key component of offshore oil and gas development, but it is also one of the weak and vulnerable components. The top-tensioned riser connects the seabed and the offshore platform in a vertical or nearly vertical manner, and transports resources such as oil and gas on the seabed to the platform for processing. Top tensioned risers are connected at the top to a tensioner located on the deck of the platform and at the bottom to a wellhead fixed to the seab...

AI Technical Summary

Problems solved by technology

In addition, under the joint action of platform motion, environmental load and internal flow, closely arranged adjacent risers have different motion responses, which may cause interference or collision between risers and affect the safe operation of risers.

[0004] For the traditional tension leg platform (TLP), due to the large inner distance of the pontoons, interference and collision between the top-tensioned riser and the platform structure generally do not occur; however, the interaction point between the riser and the platform is located at a very high tensioner. Deteriorated the kinematic performance of the platform

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