Investigation Report
Casing Lost Overboard Following Running-Tool Mandrel Fracture During Drilling
03-26-2015 0900 G17001 WR 508 Incident >$25K - Item Lost Overboard
- BSEE
- Investigation Report
- Unknown
- Dropped objectsMechanical failure
- DrillingDynamic positioning
- Upstream oil and gas
- Offshore installation
Read at BSEEOpens the document on bsee.gov
Summary
BSEE investigates the loss of approximately 3,107 feet of casing from Noble Jim Day during drilling at Walker Ridge 508. Strong loop currents complicated dynamic positioning before a running-tool mandrel fractured. Testing found no material anomalies; the report attributes failure to casing weight and current loading. ROV checks found no infrastructure damage.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Mechanical failure; equipment failure.
Classifications: Drilling; well drilling.
Classifications: Dynamic positioning; DP; DP operations.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.