ASM Failure Analysis Case Histories: Oil and Gas Production Equipment
Failure of Coiled Tubing due to Hydrogen Sulfide (H2S) Exposure
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Published:2019
Abstract
Coiled tubing with 80 ksi yield strength manufactured to a maximum hardness of 22 HRC to meet NACE Standard MR0175 requirement for sour gas service failed after being on 38 jobs (70% of its estimated fatigue life). A transverse crack where a leak occurred was identified as the primary failure point. Numerous OD surface fissures were revealed by a low-power microscope. A brittle zone near the OD, identified as a sulfide stress crack with additional fatigue cracking was revealed by SEM. Sulfide stress cracking defined as brittle failure by cracking under the combined action of tensile stress and corrosion...
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Member Sign InFailure of Coiled Tubing due to Hydrogen Sulfide (H2S) Exposure, ASM Failure Analysis Case Histories: Oil and Gas Production Equipment, ASM International, 2019, https://doi.org/10.31399/asm.fach.petrol.c0051870
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