Method for protecting anti-corrosion layer of pipeline during horizontal directional drilling crossing in oil and gas engineering

Abstract

The invention discloses a method for protecting an anti-corrosion layer of a pipeline during horizontal directional drilling crossing in oil and gas engineering. By the method, the completeness of the anti-corrosion layer of the pipeline in the horizontal directional drilling crossing process can be protected, the anti-corrosion layer is prevented from being scratched, and the operating safety and reliability of the pipeline are improved. The method can be also applied to protection of the anti-corrosion layer of a ground buried pipeline in rock sections of mountain areas. The method has the advantages that: an epoxy glass steel protection layer is high in hardness and good in anti-scratching performance; with a matched technology, the epoxy glass steel protection layer can be well bondedwith the anti-corrosion layer of the pipeline and is difficult to peel in the crossing process; special requirements for anti-corrosion materials of the pipeline and the surface of the materials are avoided; epoxy resin is solidified at normal temperature, and the protection layer is simple and convenient to construct; a weld crater repair part of the pipeline is easy to construct and a damaged part of the protection layer is easy to repair by using the epoxy glass steel protection layer; operation is simple and convenient; the completeness of the anti-corrosion layer of the pipeline of a horizontal directional drilling crossing section can be effectively guaranteed; and the reliability of safe operation of the pipeline is improved.

Description

technical field [0001] The invention relates to a construction method, in particular to a protection method for oil and gas engineering directional drilling to pass through pipeline anticorrosion layers. Background technique [0002] Horizontal Directional Drilling (HDD) crossing technology is widely used in various soil conditions for oil and gas pipelines to cross rivers, ditches, highways, railways and other areas that are not easy or suitable for shallow burial passage. Since the pipeline here is buried deep underground or under the river, the anticorrosion layer cannot be repaired by excavation after the pipeline anticorrosion layer is damaged. Therefore, the pipeline anticorrosion layer should be kept as complete as possible. However, in the process of dragging the pipeline back from the hole during the directional drilling pipeline crossing construction, due to the limited geological and construction conditions, it will inevitably cause great damage to the pipeline an...

AI Technical Summary

Problems solved by technology

The currently used polyurethane protective layer has poor scratch resistance; the protective coating of UV-curable material needs to be coated multiple times, and a special light source must be used to effectively cure; the double-layer wear-resistant fusion-bonded epoxy coating can only Disadvantages of prefabrication, inconvenient construction on site, etc.

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