Anticorrosion layer protective structure of pipeline of directional drilling crossing section and method for manufacturing anticorrosion layer protective structure

Abstract

The invention provides an anticorrosion layer protective structure of a pipeline of a directional drilling crossing section and a method for manufacturing the anticorrosion layer protective structure. The anticorrosion layer protective structure comprises a steel pipe and an anticorrosion layer. The anticorrosion layer covers the outer surface of the steel pipe, and a composite protective layer further covers the outer surface of the anticorrosion layer. The method for manufacturing the anticorrosion layer protective structure includes steps of (1), pretreating the anticorrosion layer of the pipeline; (2), distributing resin adhesive; (3), discharging yarns and dipping the yarns in the adhesive; (4), winding and forming the yarns; (5), trimming the yarns. The anticorrosion layer protective structure and the method have the advantages that the anticorrosion layer protective structure of the pipeline is excellent in abrasion-resistant and scratch-resistant performance, high-temperature resistance and corrosion resistance; the method for manufacturing the anticorrosion layer protective structure is high in mechanization and automation degree, the defect of easiness in generating bubbles due to the fact that glass fiber cloth is adhered on the surfaces of existing anticorrosion layers layer by layer and the shortcoming of degradation of the strength of products due to stress concentration at interlacing points of cloth marks and the tail ends of short glass fibers can be overcome, and the shear strength of the protective layer can be greatly improved.

Description

technical field [0001] The invention relates to a protective structure of an outer anticorrosion layer of a pipeline and a preparation method thereof, in particular to a protective structure of an outer anticorrosion layer of a dragged pipeline during the construction of a crossing section of directional drilling and a preparation method thereof. Background technique [0002] At present, in the process of installing various buried pipelines (such as natural gas pipelines and oil pipelines), people often encounter obstacles such as buildings, roads, railways, rivers, lakes, and various areas that are difficult or not suitable for shallow burial. , and the directional drilling technology can better solve this problem. Under normal circumstances, buried pipelines adopt two-layer or three-layer polyolefin composite anticorrosion structure, and the anticorrosion layer of these anticorrosion structures has poor scratch resistance, and it is easy to be rubbed by hard rocks in the g...

AI Technical Summary

Problems solved by technology

[0003]At present, directional drilling at home and abroad is mainly to install a protective layer outside the anti-corrosion layer of the pipeline. The protective layer currently used mainly includes double-layer fusion-bonded epoxy coating, Polyurethane protective coating, UV-curable material protective coating, epoxy polymer concrete coating and resin glass fiber composite material protective layer, etc., mainly have poor wear resistance and scratch resistance, and complicated operation process, which is difficult to completely avoid Damage to the anti-corrosion layer of the dragged pipeline

Relevant patents propose the use of an external metal protection structure, but the overall installation and construction costs are too high, and some installations are insufficiently protected

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