Coordination type deep-sea oil transportation pipeline

Abstract

The invention discloses a coordination type deep-sea oil transportation pipeline which comprises an inner pipe, an outer pipe and heat-insulation materials. Spaces between the inner pipe and the outer pipe are filled with the heat-insulation materials, the heat-insulation materials are made of polyurethane foam materials or foam cement, an anticorrosion layer is arranged on the outer wall of the inner pipe, antislip mats are equidistantly wound on the anticorrosion layer, and centering rings with continuous groove structures are butted onto the antislip mats. The coordination type deep-sea oil transportation pipeline has the advantages of excellent coordination effects and buckling resistance, good heat-insulation performance, low steel consumption, high bending rigidity and applicability to deep-sea and extra-deep-sea oil and gas development environments.

Description

Technical field [0001] The invention relates to an offshore oil transmission equipment, and more specifically, to a coordinated deep-sea oil pipeline. Background technique [0002] The deep-sea oil pipeline is an important link in the process of deep-sea oil and gas exploration. Once damaged, it will cause irreversible losses. Deep-sea oil pipelines and general underwater oil pipelines have the following characteristics: 1. High oil pressure and high water pressure; 2. High oil temperature and low water temperature. The above characteristics lead to the need for excellent structural performance and excellent thermal insulation performance for deep-water oil pipelines. In the deep sea and ultra-deep sea fields, traditional single-layer pipelines can no longer meet the performance requirements of structure and insulation, and the pipe-in-pipe system has become the first choice for deep-sea pipeline systems. [0003] In the existing pipe-in-pipe system, the outer pipe and the inner ...

AI Technical Summary

Problems solved by technology

[0003] In the existing tube-in-pipe system, the outer tube and the inner tube often cannot move in coordination in the length direction, resulting in the inability to give full play to the bending resistance of the inner and outer tubes; at the same time, the outer tube and the inner tube move in segments in the radial direction and cannot be continuous The pressure of the inner and outer pipes is transmitted, so that the outer pipe needs a large wall thickness to overcome the huge seawater pressure; in addition, the insulation layer filled between the outer pipe and the inner pipe has no structural performance and can only play the role of heat preservation, which also increases Structural Burden of the Outer Tube

The above three factors cause the various components of the pipe-in-pipe system to be unable to work in harmony, resulting in a large amount of steel consumption and failure to exert all structural performance, resulting in waste

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