Cause & Consequence
- Moving, flying or falling object
Incident Location
Drilling unit
Incident Activity
Drilling, workover
Incident Info Source
IADC
Specific Incident Equipment
Top Drive Units
Lessons Identified
The safety pin was sheared off allowing the upper pin to work its way loose and drop to the rig floor.
Incident Recommendations
Conduct routine scheduled inspection of all equipment that has a potential to drop from the derrick.
Utilize the company “DROPS Prevention Scheme” checklist and complete a Dropped Object
Management System (DOMS) Rig Inventory List. Attach pictures to the inventory list and retain in the rig
file.
"
Use safety pin with spring latch instead of using nuts similar to the ones used in 350 ton top drive.
"
Develop a JSA to be used when conducting the top drive routine inspection check.
"
Reference the following internal documents
o
Dropped Object Management System (DOMS)
o
Job Safety Analysis
o
Top drive manufacture’s (OEM) operating manual
o
Perform monthly inspections
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