Applications
Towed and bottom laid seismic acquisition systems require a wide range of cables. Nexans manufacture and terminate cables such as gunumbilicals, sensor cables, riser cables and lead-in cables for sub-sea seismic operation down to 2000m water depth.
Design
Air-gun umbilicals are used in both towed and bottom laid seismic systems.
Typically air-guns is steel armoured, comprising a central pneumatic hose with power and signal elements laid up over it. Aramid armouring can be supplied on request.
The cable elements are protected from the expanding pneumatic hose by a compressible "air bag" (patent granted 2002).
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