Anti-sulfur non-metallic composite continuous tube is internationally leading

Recently, the sulfur-resistant non-metallic composite continuous pipe developed by CNPC Engineering Materials Research Institute Co.
, Ltd.
has passed the appraisal
of scientific and technological achievements organized by the China Petroleum and Chemical Industry Federation.
The appraisal results show that the product has reached the international leading level, has outstanding temperature resistance and corrosion resistance, has good economic and social benefits, and can provide a strong guarantee
for the smooth operation and efficient development of oil and gas fields.

An important feature of oil and gas resources in western China is hydrogen
sulfide.
Under the existing technical conditions, the cost of sulfur-resistant alloy pipelines remains high, and sulfur-resistant carbon steel pipelines have high filling costs and difficult management due to the injection of corrosion inhibitors
.
Based on the dual needs of corrosion control and cost reduction and efficiency improvement, non-metallic pipes with excellent corrosion resistance have become an important development direction
for sulfur-containing oil and gas transmission pipes.

The engineering materials research institute has developed sulfur-resistant non-metallic composite continuous pipes, which have broken through the technical bottlenecks
of pipe structure design, material selection, quality assessment, and on-site application.
The product uses high barrier, high temperature resistance and swelling resistance thermoplastic as the lining layer, and was approved as an important product
of independent innovation of CNPC in 2020.
In addition, the product can be used in an environment of 110°C for a long time, and the design maximum transmission pressure is increased to 16 MPa, and the maximum partial pressure of hydrogen sulfide is 2500 kPa, which is better than international standards
.

At the same time, the product solves the problem of corrosion and perforation of alloy products, and the service life is expected to be increased by 2~3 times, reducing the environmental pollution
caused by failure accidents.
The product has 21 core patents, including 13 invention patents and 8 utility model patents
.
At the same time, the Engineering Materials Research Institute has established a full-scale physical pipe performance evaluation technical system based on service conditions in China, formulated and revised more than 10 national and industry standards, and improved the application level of
surface non-metallic pipelines in China's oil and gas fields.

It is reported that the product has been demonstrated and applied in Tarim oilfield for more than 4.
8 kilometers
.
After many sampling evaluations in the later stage, it is proved that the product has good service safety and stability, meets the requirements of acid gas gathering and transportation process, and is expected to replace metal corrosion-resistant pipes and become a powerful grip
to solve the corrosion failure of acid gas field gathering and transportation pipelines and reduce pipeline construction investment.
In addition, after further optimization, the product can also be applied to downhole intelligent continuous pipe and marine non-metallic composite pipe, providing strong support
for domestic oil and gas development.