Separable type deepwater seabed pipeline bending test system

Abstract

The invention belongs to the technical field of deep sea oil development, exploitation and transportation and relates to a separable type deepwater seabed pipeline bending test system which comprises a pressure chamber, a pipeline bending loading device, a hydraulic loading mechanism and a pipeline auxiliary device, wherein the pressure chamber comprises a main chamber body and front and tail end covers connected to two ends of the main chamber body; sealing rings are arranged inside the front and tail end covers; a guide rail is arranged on the upper surface of the bottom of the pressure chamber; the pipeline bending loading device which is composed of a bracket and a pulley is arranged on the guide rail; two end parts above the bracket are provided with a pair of U-shaped clamp slots with slotted plates; two pairs of detachable cover plates with slotted plates and bolts are arranged above the two U-shaped clamp slots; and a pair of hydraulic loading mechanisms are arranged at the inner side above the bracket. The system can be used for simultaneously loading an external static water pressure, a bending pressure and a test-piece inner pressure on a real proportional test-piece and can be used for simulating the actual flow condition of conveying different media at different temperatures by using the seabed pipeline in the actual engineering.

Description

technical field [0001] The invention belongs to the technical field of deep sea oil development and transportation, and relates to a buckling test device for a submarine pipeline. Background technique [0002] The environmental conditions of submarine pipelines, especially deep-sea submarine pipelines, are extremely complex. During the working process, they are subjected to various loads, such as the seawater pressure acting on the outer wall of the pipeline. Especially for deep-sea pipelines, the water pressure increases with water depth. Increasing the water depth of 1,000 meters can increase the external pressure of the pipeline to ten MPa; wave fluctuations or current surges, rough seabed terrain, and pipe laying operations will cause the pipeline to bend. Since the submarine pipeline generally transports heated oil, the temperature difference between the inside and outside The thermal expansion force formed also has a great influence on the pipeline. The deep-sea pipeli...

AI Technical Summary

Problems solved by technology

The joints of the pipe fittings protruding from the cabin are sealed with movable rubber devices. Due to the use of rubber seals, the water pressure in the middle section of the cabin cannot be added to the deep sea hydrostatic pressure value, generally the maximum is 1Mpa, and the test length of the pipe fittings is limited. Effective on the pipe test piece The study area is small

At present, there is no device in China that simulates the deep-sea high-pressure environment and is suitable for buckling tests of full-scale pipelines under loads such as bending and internal pressure.

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