A kind of oil and gas field environmental protection anti-penetration flexible high-pressure conveying pipe and its process method

Abstract

The present invention relates to an oil-gas field environment-friendly anti-penetration flexible high-pressure conveying pipe and a process method thereof. An oil-gas field environment-friendly anti-penetration flexible high-pressure conveying pipe includes an inner core layer, a winding layer and an outer protective layer in sequence from the inside to the outside. The inner core layer It includes an anti-seepage layer, an adhesive layer and an outer layer sequentially from the inside to the outside, the anti-seepage layer is made of PVDF material, the adhesive layer is EVA composite glue, and the outer layer is polyethylene resin. The invention has a simple structure, effectively prevents the infiltration of the medium, prevents the soil from being polluted during the transportation process, and prevents the use of the outer layer and the outer protective layer from being corroded due to the infiltration of the medium; the three-layer co-extrusion process can be used to make the anti-seepage layer , The adhesive layer and the outer layer are extruded in one piece, the permeability of this product is much lower than that of similar products; the winding tension is appropriate, so that this product has a good anti-pressure effect and good flexibility.

Description

technical field [0001] The invention belongs to the technical field of pipelines used in oil and gas fields, and in particular relates to an environment-friendly, seepage-proof and flexible high-pressure pipeline for oil and gas fields and a process method thereof. Background technique [0002] At present, the transmission pipelines used in oil and gas fields mainly include steel pipes, glass steel pipes, flexible composite pipes and steel skeleton composite pipes. Due to the poor corrosion resistance of steel pipes and the high brittleness of glass steel pipes, they are easily broken. At present, the main transportation pipelines used are flexible composite pipes and steel skeleton composite pipes. After the use of the above two products in recent years, due to the low density of the polyethylene lining layer and the large gap between molecules during use, when transporting crude oil or gas, the medium to be transported passes between the molecules. The gap is lost, seeps ...

AI Technical Summary

Problems solved by technology

After the use of the above two products in recent years, due to the low density of the polyethylene lining layer and the large gap between molecules during use, when transporting crude oil or gas, the medium to be transported passes between the molecules. Gap loss, infiltration into the soil, causing pollution to the land

Due to the penetration of the conveying medium, it is easy to cause corrosion to the reinforced layer of the composite pipe, thereby reducing the pressure performance of the product, gradually causing the pipe body to rupture, and causing large-scale pollution to the land and the environment.

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