S135

2 cases · 2 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Condition: Damage Capture method: Optical Microscope Detail focus: Banded Structure clear all

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Tempered martensite of the pipe body of this API 5D grade S135 drill pipe. The material presents, at this low magnification micrographic aspect, a slightly banded structure, usual for this type of drill pipe.
58
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ML00159 / Mar.2020
Collapse of a Drill Pipe
M - Low Alloy Medium Carbon QTP - Drill PipeAp - O&G Well DrillingCd - Ductile Behavior
Cm - Nital Etched Micrography by OMDf - Banded Structure
Micrography of the longitudinal section of the pin showing a tempered martensite structure, with bands that are associated to segregations. The pin presented average hardness of 38 HRc in the section.
63
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ML00009 / Sep.2017
Hydrogen Cracking of a 5" Drill Pipe S135
M - Low Alloy Medium Carbon QTP - Drill PipeAp - SubseaCd - Hydrogen Embrittlement
Cm - Nital Etched Micrography by OMDf - Banded Structure