STATS GROUP
Process & Pipeline Integrity Solutions
Pipeline Isolation, Integrity, Testing, Connection, Repair & Maintenance

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PROCESS & PIPELINE REPAIR
> Caisson Repair
> Caisson Hanger / Retrieval Tool
 

STATS Caisson Hanger / Retrieval Tools are used to safely secure damaged or corroded caissons in position, until a planned retrieval back to the platform can be performed using the same tool.

The internal clamping system features a twin module design each with its own set of independently controlled locks, based on the Tecno Plug™ taper lock-ring design. This system provides axial and lateral stabilisation within the caisson and can operate in a caisson with varying wall thicknesses.

The modular design of the tool allows easy construction in areas of limited space, and can be configured to varying lengths to allow for a choice of set positions within the caisson up to a maximum of 10 meters apart.
24" Caisson Hanger / Retrieval Tool
 
Key Features:
Fractured caisson safely recovered using Caisson Hanger/ Retrieval Tool
• Tool retains caisson securely until repair or replacement.
• Locking system based on taper lock-ring and segmented lock assembly.
• Hydraulically actuated locks grip internal wall of caisson.
• Independent locks can set in caissons with varying wall thicknesses.
• Modular design allows tool configuration to suit caisson defects.
• Tension cable supplies self-energisation effect when pre-tension is applied.
• Once pre-tension is applied to support rigging, hydraulic actuation circuit is redundant.
• Tool removed by releasing tension and hydraulically de-activating locks.