Fracture Failure Analysis of C110 Oil Tube in a Western Oil Field

Abstract:

There was an oil pipeline fracture found in the unlock process of Z well in western oilfield.The reason that made the oil tube fracturewassystematically studied usingmacroscopic analysis,physical and chemical property test,scanning electron microscope with an energy dispersive X-ray spectrometer and X-ray diffraction analysis.The results suggested that the requirement of relevant standard for C110 steel grade was satisfied with the chemical component and mechanical property of oil tube.The perforation of oil tube made H₂S in the fluid medium enter the oil set of connected rings. In addition, the high-pressure gas left by gas contained certain H₂S and O₂ so that the tubewould fracture and be invalid under the combined action of sulfide stress corrosion and oxygen corrosion.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 1251-1256
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.1251
• Online since: May 2020
• Authors: Li Xia Zhu*, Xian Ren Kuang, Mao Xian Xiong, Xing Xing, Jin Heng Luo, Jun Feng Xie
• Keywords: Fracture, Oil Tube, Oxygen Corrosion, Stress Corrosion

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