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ST-80 Cylinder Failure Causes Lower Leg Fracture | Issue 04-2025
ST-80 Cylinder Failure Causes Lower Leg Fracture | Issue 04-2025
The crew was in the process of pushing liner to bottom. After completing the first connection of heavy weight drill pipe, the Floor Hand was moving the ST-80 (iron roughneck) back to its parked position. While maneuvering the ST-80, the extend/retract hydraulic duplex cylinder suddenly failed, causing the unit to fall forward and downward.
The crew was in the process of pushing liner to bottom. After completing the first connection of heavy weight drill pipe, the Floor Hand was moving the ST-80 (iron roughneck) back to its parked position. While maneuvering the ST-80, the extend/retract hydraulic duplex cylinder suddenly failed, causing the unit to fall forward and downward.
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