Mooring Chain/Wire Changeover System

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A North Sea semisubmersible had an 8-leg combined wire and chain mooring system whereby the wire and chain had to be disconnected from each other as the mooring lines were run and retrieved.  For various reasons, torque would accumulate in the chain and wire and made disconnection very hazardous.  Hampco developed a unique hydraulic hang-off and handling arrangement to safely control the torque built up at the chain/wire transition and allowing safe manual disconnection.  The scope included all structural support and access on the rig columns.