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CSB Investigation
Report No. CSB-PRYOR-2019
2019
Explosion Explosion
Pryor Trust 气井失控喷爆
Pryor Trust, Pittsburg County, Oklahoma
Related equipment → piping (piping)
5Fatalities
0Injuries
ExplosionMechanism code EXP
⌗Failure Mode · ISO 14224 Mapping
Damage mechanism (recorded in KB)
ExplosionEXP
Internal damage-mechanism code (not ISO 14224)
ISO 14224:2016 functional failure code
OTH · Other
Mapped to ISO OTH — Other.
1What Happened
钻井作业中大气泄漏爆炸，5 名工人死亡
2Root Cause
钻井井控/防喷器失效（跨行业映射至承压设备）
3Reliability Lessons (from investigation root cause)
- The 'Root Cause' above is the core lesson of this accident; not split further.
4Associated Failure Mechanisms (Keywords)
气井 井喷 爆炸 钻井 油气
About the Failure-Mode Code (click to expand)
The mechanism code EXP shown on this card is the KB's internal damage-mechanism abbreviation (not an ISO 14224 code); it describes how the equipment failed. The 'ISO 14224 Mapping' block above maps it to the correct ISO functional failure code (which describes what the equipment failed to do) — these are two distinct dimensions in ISO 14224. The mechanism follows the narrative in the card body.
5Evidence Source (transparent)
Authority：U.S. Chemical Safety and Hazard Investigation Board (CSB)
Official Report：www.csb.gov ↗
Data Verification：verified_url_csb_investigations_list_2026-08-07（终报 2019-06-12）
↗Related Failure Modes · Traceability
This accident is not yet linked to a specific FM traceability card.