High-pressure resistant oil and gas pipeline

Abstract

The invention relates to a high-pressure resistant oil and gas pipeline, which comprises a steel pipe. A steel ring is coaxially and fixedly arranged at two ends of the steel pipe respectively, a steel bar framework is coaxially and fixedly arranged between the two steel rings, concrete is coaxially and fixedly arranged on the outer wall of the steel pipe, a prestressed steel wire is wound on the outer wall of the concrete, and protective layers are fixedly arranged on the outer wall of the concrete and the outer wall of the prestressed steel wire. The high-pressure resistant oil and gas pipeline has simple integral structure and scientific and reasonable design, effectively reduces the consumption of steels, reduces the production cost, prolongs the service life, and has simple process and good corrosion resistance.

Description

technical field [0001] The invention relates to the field of pipelines for transporting oil and natural gas, in particular to a high-pressure resistant oil and gas pipeline. Background technique [0002] At present, the oil and gas pipelines on the market are all steel pipes. The wall thickness of steel pipes is generally 8-60mm according to the pipe diameter and operating pressure. The pipe joints are connected by welding, and then an anti-corrosion layer is made on the outer wall of the pipe. With the increasing pressure requirements for oil and gas pipelines and the promulgation of national energy conservation and emission reduction policies, oil and gas pipelines will develop towards high-grade steel and thin pipe walls. For example, the use of X100 pipes saves about 30% of the cost compared with X65 and X70, and saves pipeline construction. The cost is 10% to 12%, but the high steel grade and thin pipe wall also have the following problems: 1. When the steel grade of th...

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Problems solved by technology

With the increasing pressure requirements for oil and gas pipelines and the promulgation of national energy conservation and emission reduction policies, oil and gas pipelines will develop towards high-grade steel and thin pipe walls. For example, the use of X100 pipes saves about 30% of the cost compared with X65 and X70, and saves pipeline construction. The cost is 10% to 12%, but the high steel grade and thin pipe wall also have the following problems: 1. When the steel grade of the pipe exceeds X120 and X125, it is very difficult to reduce the cost by simply increasing the steel grade; 2. The existing crude oil transportation In terms of technology, high-condensation and high-viscosity crude oil is transported by heat treatment, and the insulation capacity of the steel medium is poor, and energy consumption is serious; 3. The external anti-corrosion treatment of the pipeline is only on the outer surface of the pipe, which will inevitably cause damage to the external anti-corrosion layer during construction and backfilling damage, greatly reducing the service life of the pipe, thus bringing inestimable losses to the entire project

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