Aspect Before Analysis

2 cases · 3 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Condition: Damage Microstructure: Segregation Bands Standard: API clear all

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Lateral image of a collapsed API 5D grade S135 drill pipe, presenting the fractured region (bottom of the figure) at the pipe body. Although the pipe steel is of a high strenght, the fracture characteristic is ductile, evidencing strong plastic deformation.
545
VIEW
ML00159 / Mar.2020
Collapse of a Drill Pipe
M - Low Alloy Medium Carbon QTP - Drill PipeAp - O&G Well DrillingCd - Ductile Behavior
Cm - Aspect Before AnalysisDf - General View
The connector was welded to the pipe from both (internal and external) sides, a PWHT was applied and the part was machined. The UT indication was detected during final inspection.
78
VIEW
ML00072 / Jan.2018
Liquation Cracks in a High Strength Joint
M - Low Alloy Medium Carbon QTP - Longitudinal Seam Welded PipeAp - O&G Well DrillingCd - Welding Defect
Cm - Aspect Before AnalysisDf - General View

More from these cases

ML00159 — Collapse of a Drill PipeM - Low Alloy Medium Carbon QTP - Drill PipeAp - O&G Well DrillingCd - Ductile Behavior
Macroscopic view of the fracture in the pipe body. In the bottom of the figure, the fracture of the pipe shows a thicker thickness, revealing that this is the pipe region that was first damaged by bending (buckling). In the top of the figure, the fracture shows a (ductile) shearing mechanism and the thickness is thinner, as will be better observed in the macrography.
39
VIEW
ML00159 / Mar.2020
Collapse of a Drill Pipe
M - Low Alloy Medium Carbon QTP - Drill PipeAp - O&G Well DrillingCd - Ductile Behavior
Cm - Aspect Before AnalysisDf - Fracture