Damage

1 case · 1 image

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Application: Subsea Standard: API Capture method: Longitudinal Section Aspect clear all

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Macrography of the longitudinal section of the tool joint, assembled. The pin is still attached to the box end of the other drill pipe in the column, showing that the pin fractured in the region of external diameter transition (right side of the figure), where the box was probably touching the pin shoulder. Interesting to note that the inner diameter still presents a sound coating.

73

ML00088 / Dec.2017

Hydrogen Cracking of an API 5D S135 Drill Pipe

M - Low Alloy Medium Carbon QTP - Drill PipeAp - SubseaCd - Hydrogen Embrittlement

Cm - Longitudinal Section AspectDf - Longitudinal Section