The high-temperature mechanical properties of HS110S steel and its corrosion behaviors in harsh downhole environment

Abstract

Purpose

This paper aims to investigate the high-temperature mechanical properties of HS110S steel and its corrosion behaviors in harsh downhole environment.

Design/methodology/approach

In this work, mechanical property measurements were carried out from 25°C to 350°C and the scanning electron microscopy was used to observe the fracture morphology. The weight-loss measurements and surface characterization were used to evaluate the corrosion resistance of HS110S steel in harsh downhole environment.

Findings

Results show that the yield strength and tensile strength of HS110S steel at 350 °C are 779 and 861 MPa, respectively. Compared with room temperature, the reduction rate values are both less than 20%. At the high-temperature corrosion environment (350 °C), the static and dynamic corrosion rates are 0.9668 and 1.9236 mm/a, respectively. The generated corrosion products are mainly composed of FeSx, FeCO₃ and Fe₃O₄. Therefore, the HS110S steel applied under such conditions needs to take suitable protective measures.

Originality/value

In general, the HS110 steel has widely used in conventional development conditions (e.g. low H₂S or high CO₂ environments). However, to the best of the authors’ knowledge, no studies have reported on its application at more than 250°C. Therefore, this work can be a reference to the application of HS110S steel in high-temperature corrosion conditions.

Citation

Liu, W., Zhou, Z., Li, Z., Li, M., Li, Q., Ye, Z., Yao, J. and Zhong, X. (2022), "The high-temperature mechanical properties of HS110S steel and its corrosion behaviors in harsh downhole environment", Anti-Corrosion Methods and Materials, Vol. 69 No. 5, pp. 550-560. https://doi.org/10.1108/ACMM-05-2022-2650