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Shale gas pressure valve blocks are consumable parts in fracturing equipment. Using alloy structural steel, their average lifespan is only 30 hours. Therefore, selecting new materials to manufacture fluid valve blocks to increase their lifespan is a direction actively researched by domestic and international oil and gas equipment manufacturers and oil service companies.
In 2014, the company became the first domestic and internationally leading enterprise to manufacture large precipitation-hardened stainless steel fluid valve blocks by utilizing the high strength, high corrosion resistance, and high aspect ratio characteristics of 15-5PH material. After multiple experiments, fluid valve blocks made from 15-5PH achieved a lifespan of 1000 hours, leading both domestically and internationally. By 2023, the company had achieved batch supply to major domestic and international vehicle manufacturers and parts processing enterprises, receiving positive market feedback.
The fracturing pump body forgings produced by the company exhibit excellent mechanical properties, uniform structure, and good purity. Mechanical properties, a comprehensive indicator for materials, are influenced by factors such as grain size, ferrite content, segregation, and purity. Comparing transverse mechanical properties, under the same tensile performance conditions, the room temperature impact performance of the company’s fracturing pump body forgings is twice that of the Italian benchmark company. Using the Explorer ASPEX electron microscope from Thermo Fisher Scientific for metal inclusion detection, overall analysis showed the company’s inclusion index to be 4.8. Using the SAE AMS 2315H-2020 standard for ferrite content detection, the δ-ferrite content in the company’s fracturing pump body material is 0, with no banded segregation.
The company has extended its mature large forging heat treatment technology to ultra-large wellhead pressure equipment and high-pressure food safety fields. For example, the F6NM 75ksi stainless steel material used in blowout preventers can be produced in a maximum size of 600mm×550mm, with the full cross-section Rockwell hardness reaching below 22HRC. The products fully meet the NACE MR0175 corrosion resistance requirements.
