Submarine pipeline complex load joint loading test device

Abstract

The invention relates to a combined loading testing device for complex loads of submarine pipelines. The combined loading testing device comprises an end cover (1-1), a cylinder end part (1-6), a cylinder main body (1-5) and a cylinder tail (1-12), wherein a front-end sealing flange (1-15) and a tail-end sealing flange (1-19) are welded to two ends of a testing pipe fitting (1-16), respectively, holes are formed in the top and the side part of the cylinder main body (1-5), respectively, and vibrating devices (1-10) are mounted at the two holes and are used for applying vibrating loads to the testing pipe fitting along the radial direction; an axial force-torque combined loading device is connected to the cylinder tail (1-12) through a connecting assembly (1-13); the tail-end sealing flange (1-19) is connected with a connecting shaft (1-21) through a tail-end connecting assembly (1-23), and the connecting shaft (1-21) stretches out of a cylinder and is connected with the axial force-torque combined loading device. According to the combined loading testing device, the approximate simulation of deepwater pipelines and vertical pipes under different limiting conditional loads is provided.

Description

technical field [0001] The invention relates to a combined loading test device for complex loads of submarine pipelines, which can realize the joint action of axial tension and compression, vibration, torque and external pressure loads on a scaled pipeline test piece, and approximate simulation of submarine pipelines and standpipes in the test. The real operating environment during installation and service enables in-depth exploration of the failure modes of deepwater pipelines and risers under different load combinations. Background technique [0002] Energy security and the core competitiveness of the world economy are increasingly dependent on the utilization and development of marine resources. However, my country's offshore oil and gas exploration and development technology still has a large gap compared with the world's advanced level. It is necessary to accelerate the innovation of deep-sea oil and gas development technology and enter the "deep-sea era". [0003] Amo...

AI Technical Summary

Problems solved by technology

[0005] 1. The external load that can be simulated by domestic and foreign deep-water pressure chambers is single, mainly due to the influence of axial tension or bending moment under the action of water pressure on the mechanical properties of submarine pipelines, and local stability tests under the combined action of multiple loads cannot be realized

[0006] 2. Relevant devices at home and abroad cannot realize the dynamic test of submarine pipeline specimens under high pressure by applying radial bidirectional vibration, axial tension and compression and torque composite loads at the same time under the action of high water pressure

[0007] 3. Relevant devices at home and abroad cannot realize the dynamic test of deepwater riser specimens under high pressure by applying axial and radial vibration loads at the same time under the action of high water pressure

[0008] The existing test device (such as patent application number: CN201110008538) has realized the test of a full-scale pipeline, but it is only a single application of external loads, and cannot realize the joint action of multiple loads

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