Directional drilling crossing pipeline outer coating structure and machining method thereof

Abstract

The invention provides a directional drilling crossing pipeline outer coating structure and a machining method thereof. The directional drilling crossing pipeline outer coating structure is formed by wrapping the outer surface of a corrosion-resistant layer with a composite protection layer. The composite protection layer is made of pressure-resistant and friction-resistant composite materials formed by mixing resin, fibers and an additive, wherein the resin is photocuring composite resin, the fibers are made of epoxy glass reinforced plastic and / or dual-layer sintered epoxy powder, and the additive is a solvent-free epoxy abrasion-resistant coating. The composite protection layer has high mechanical damage resistance, and when directional drilling crossing encounters complex geological conditions and hard underground structures, damage to the corrosion-resistant layer can be avoided to the greatest extent. The directional drilling crossing pipeline outer coating structure can resist corrosion of a chemical solvent, the phenomenon that a thermal shrinkage sleeve is possibly disengaged in the construction process is completely avoided, and the effect of protecting a pipeline welding junction is greatly improved; and the curing time is short, construction is easy, the construction period is not affected, and the directional drilling crossing pipeline outer coating structure is not influenced by weather elements or field construction conditions, greatly saves manpower and material resources, is high in operability, is easy to implement and popularize, and has broad industrial application prospects.

Description

technical field [0001] The invention relates to the technical field of pipeline laying, in particular to an outer coating structure and a processing method of a directional drilling penetrating pipeline. Background technique [0002] With the development of science and technology and the progress of society, in the current existing technology, in oil field surface pipeline operations, directional drilling crossing technology is widely used in oil and gas pipelines crossing rivers, ditches, highways, railways and other places that are difficult or unsuitable for shallow drilling. Buried through the area. [0003] Due to the complexity of crossing the strata and irregular construction measures, the three-layer extruded polyethylene anti-corrosion layer is scratched deep when the pipeline is dragged back, the heat shrinkable sleeve (belt) covering the welding joint is scraped over, and even the pipe body is scratched. The phenomenon of nudity. Different from the laying method...

AI Technical Summary

Problems solved by technology

The outer coating structure used in the prior art mainly has problems such as poor wear resistance and scratch resistance, complicated construction technology, and it is difficult to effectively avoid damage to the anti-corrosion layer caused by pipeline dragging back.

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