Buckling test device for deepwater submarine conduit

Abstract

The invention relates to a buckling test device for a deepwater submarine conduit, belonging to the technical field of development, exploration and transportation of deepwater oil. The buckling test device of the deepwater submarine conduit comprises a pressure cabin consisting of a main cabin body, a front-end cabin cover and a tail-end cabin cover of the cabin body, wherein the front-end cabin cover and the tail-end cabin cover are respectively connected to the two ends of the main cabin body; a seal ring is respectively arranged on the inner sides of the front-end cabin cover and the tail-end cabin cover; an oil hydraulic press is fixed on the front-end cabin cover; the piston rod of the oil hydraulic press is extended into the main cabin body through penetrating the front-end cabin cover; the end part of the piston rod is provided with a piston rod flange; the upper surface of the bottom of the main cabin body is provided with guide rails; a tackle for transporting a conduit piece to be tested is placed on the guide rails; the two ends of the conduit piece to be tested are connected with an end flange of the conduit respectively; the piston rod flange is matched with one end flange of the conduit; and the other end flange of the conduit on the other end of the conduit piece to be tested is matched with a top-bottom flange which is fixed on the tail-end cabin cover of the cabin body. Through the buckling test device for deepwater submarine conduit, a deepwater high-pressure environment can be simulated, thus a buckling test for the conduit with various loads can be performed.

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 marine environment, especially the deep sea environment, has complex and diverse conditions. Submarine pipelines not only bear self-weight, external hydrostatic pressure, internal pressure, medium temperature, prestress, force of pipeline accessories, force of covering and seabed, force caused by pigging operation, etc. Functional loads, as well as environmental loads such as wind, waves, currents, ice (for riser or landing pipeline sections) and earthquakes, are also challenged by occasional loads such as extreme sea conditions, ship collisions, falling objects, sand liquefaction, and operational failures. Pipelines laid in deep water areas are very likely to fail under the action of external loads, such as yield failure of the spanning section of the pipeline, bu...

AI Technical Summary

Problems solved by technology

For example, the bell-shaped pressure chamber in Norway is placed vertically to measure the buckling performance of the upper and lower sides of the plate under the action of hydrostatic pressure difference, but the maximum pressure of the pressure chamber is only 4Mpa; while the domestic 915 pressure cylinder has a working section with a diameter of 1.5 m, the length of the working section is 2.9m, the pressure cylinder is also vertical, and the pipeline buckling test device suitable for longer pipe fittings and considering various load combinations has not yet appeared in China

Images