Offshore Platforms for Jack-up, semi-submersible and drillships
Before a jack-up reaches location, buoys are normally dropped off to mark the centre and leg positions. Marex’s divers are required to do a circular
search of these position to ensure that the legs will be clear of debris
Marex measure de depth of penetration of the legs using an air probe
in area of strong currents, our divers will have to check for scour around the legs and, if necessary, fill scour holes with sandbags and build a
protective wall around the base of the legs
Marex inspecting and repairing the hull
Checking anchor rack and fairleads
Marex checking for debris and penetration of the pontoons (if resting on the seabed) when in shallow water
Inspecting Thrusters, pontoons and all underwater parts of the structures
Assisting with the rigging of anchor pendant wires
Assisting with the recovery of any lost or damaged equipment
Inspect, maintain and repair ship’s accessory structures such as moonpool doors
Inspect all the ship’s thrusters and keep them clear of fouling
Pipelay barges
Shallow, surface-oriented air diving task on the stinger to check and maintain its efficient operation. When diving on stingers divers should have a
means if indicating their position day and night.
Deeper, work on the seabed associated with the pipe and work on the laydown head ad pipeline connections.
Camera or light replacement
Testing valve to flood or dewater the pipe
Stinger valve operation to adjust buoyancy and catenary
Operation on wire of pulling head’s pipe
Install hyperbaric welding habitat
Bolt tensioning
Operate A-frames
Line Up pipeline/risers, measure spoolpiece requirements
Pipeline connections
Metrology: Measurements for spoolpiece fabrication and installation
All types Flanging connections and alignment operations
