SPOBlowout preventer (BOP) valve failed to close -> loss of well control
BOP valve sticking + cement plug failure + inadequate well-integrity verification
The recorded code SPO is an ISO 14224:2016 functional failure code (describes what the equipment failed to do). The damage mechanism (how it failed) is shown in the Mapping block above. The two are distinct dimensions in ISO 14224.
FPH-C5-FM1阀门卡涩/内漏 MECH-VALVE-STICKINGValve Body Corrosion / Erosion fmValve-seat Surface Damage -> Internal Leak fm_2Valve-plug Erosion fm_3Valve Stem Sticking / Bending fm_4Packing Wear -> External Leak fm_5Diaphragm Rupture fm_6Spring Fatigue / Fracture fm_7I/P Converter Failure i_pFeedback Link Loosening fm_8Coil Burnout fm_9Valve Plug Sticking -> Failure to Actuate fm_10Contact Corrosion / Poor Contact fm_11Filter-element Blockage -> Insufficient Supply fm_12Pressure-Relief Valve Set-point Drift fm_13阀门卡涩（机械卡阻） valve_sticking_through弹簧松弛整定漂移 spring_relaxation_setpoint_drift波纹管失效 bellows_failure喉部冲蚀 nozzle_erosion整定压力错误 improper_set_pressure异物堵塞 foreign_object_blockage阀体腐蚀 corrosion_body热黏结（聚合物） thermal_binding起跳颤动 chatters_on_lift拒动（超压不开启） failure_to_open入口管线堵塞 inlet_line_blockage选型过小排量不足 sizing_undersized阀门卡涩/内漏 MECH-VALVE-STICKING阀门卡涩/内漏 MECH-VALVE-STICKING阀门卡涩/内漏 MECH-VALVE-STICKING冲蚀/冲刷腐蚀 MECH-EROSION结垢/堵塞 MECH-FOULING均匀/局部减薄（通用减薄） MECH-THINNING大气腐蚀 MECH-ATMOS机械疲劳 MECH-MECH-FATIGUE锅炉水/凝结水腐蚀 MECH-BWC电偶腐蚀 MECH-GALVANIC脆性断裂 MECH-BRITTLE-FRACTURE