Glass products for inner lining of steel tube, and preparation method

Abstract

The invention relates to a composite steel pipe, in particular to a steel pipe lined glass product. The steel pipe lined glass product is mainly used in the fields of chemical medium transportation, prevention of eccentric wear and wax deposition in oil pumping wells, and buried cold transportation of oil pipelines. The product of the invention is manufactured through three process steps: glass tube production, steel tube sandblasting pretreatment and steel tube lining production. As a newly developed pipeline anti-corrosion technology, steel pipe lining glass technology can effectively solve the corrosion and wax deposition problems of chemical and oil field pipelines, as well as wear and eccentric wear. It has excellent corrosion resistance, excellent wax resistance, and anti-corrosion. Grinding, and can withstand higher temperature, which is also the product and manufacturing process involved in the present invention.

Description

technical field [0001] The invention relates to a composite steel pipe and its manufacturing method, in particular to a steel pipe lined with glass product and its manufacturing method. The steel pipe lined with glass product is mainly used for chemical medium transportation, pumping wells to prevent eccentric wear and wax deposition, Oil pipeline buried cold transportation and other fields. Background technique [0002] We know that pipeline anticorrosion technologies mainly include steel pipe Ni-P plating technology, nitriding technology, coating pipe technology, FRP pipeline technology, etc. The above technologies have played a certain role in the field of pipeline anticorrosion for a period of time, but there are still many problems. Disadvantages and deficiencies, specifically in: [0003] ①. The complete coating of Ni-P plating technology has obvious advantages in corrosion resistance, but in recent years, it has been found that due to technological reasons, it is imp...

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Problems solved by technology

[0003] ①. The complete coating of Ni-P plating technology has obvious advantages in corrosion resistance, but in recent years, it has been found that due to technological reasons, it is impossible to obtain non-porous coatings, and the serious environmental pollution of the process has forced it to reduce its use or stop production

[0004] ② Nitriding technology is better in terms of corrosion resistance and wear resistance, but the surface hardness of the material increases after nitriding, which changes the hardness of the thread and affects the sealing performance of the thread, and causes the elastic coefficient of the surface layer and the core to be different. For deep wells In oil fields, once the tubing is heavy and the surface is cracked, stress concentration will occur and the tubing will be broken, so there are certain limitations

[0005] ③. Coating tube technology has corrosion resistance but is not wear-resistant, and its application also has certain limitations

[0006] ④. FRP pipes have good corrosion resistance, but their strength is low and they are not resistant to high temperatures, so oil production wells cannot be used

Wells stuck due to wax plugging often occur, and wax deposition reduces pipeline transportation area, oil transportation capacity, production decreases, and energy consumption increases, which seriously affects the output efficiency of wax deposition wells

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