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Jacket levelling tool assembly link plate and pin failure
Country: QATAR - Middle East
Location: OFFSHORE : Other offshore
Incident Date: 14 December 2021 Time: ---
Type of Activity: Construction, commissioning, decommissioning
Cause: Dropped objects
A jacket level survey was ongoing, using a levelling tool installed on the top of the jacket pile and connected with grommets and shackles to the jacket legs on both sides.
Pins of the right assembly slipped out from their position causing the grommet, right side link plate and lower pin to fall down.
As a result of the event, the grommet remained on the scaffold being connected to the jacket leg, and the link plate with the pin (weight approximately 600kg) fell into the sea and landed on the jacket mud mat. The area around the levelling tool was restricted, with access to workers as per JSA control measures, in order to not have any personnel in the line of fire (LOF) during this activity and further level survey.
What Went Wrong?:
Corrective Actions and Recommendations:
Figure 1: Jacket top view with levelling tool position indication
Figure 2: Side view of levelling tool position
Figure 3: Levelling tool and affected pin assembly
Figure 4: Levelling tool after the event
Safety Alert number: 342
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