Deep Sea Mining
Mining Umbilical Cable
for Deep Sea Mining
Structure and Components
Armour Layer: High-strength steel wires or synthetic fibres (e.g., aramid) braided or spiral wound to provide tensile strength.
Power Conductors: Copper or copper alloy conductors with pressure-resistant and water-tree-retardant insulation, designed for medium- to high-voltage power transmission.
Optical Communication Unit: Single-Mode or Multi-mode Fibres encapsulated in a stainless-steel tube or pressure-resistant jacket for transmitting video, sensor data, and control commands.
Auxiliary Lines (optional): Small hydraulic hoses or chemical injection tubes.
Sheath and Fillers: Anti-crush filler materials between components, with multilayer polymer sheaths (e.g., polyurethane, PEEK, XLPE) on the outside, plus a wear- and corrosion-resistant coating.
Design Challenges
High Pressure: the cable core experiences a uniform external pressure of approximately 30 MPa or more.
Dynamic Fatigue: Vessel heave causes repeated bending and tension
Abrasion and Corrosion: The cable may contact seabed rock, chloride ions in seawater cause galvanic corrosion of metal parts, requiring corrosion resistant alloys. protection.
Long-length Continuous Manufacturing: Single cable lengths can reach several to more than ten kilometres.
Typical Technical Parameters
Breaking Strength: Tens to hundreds of tonnes
Maximum operating water depth: 1000-2000m or more
Design life: 3-5 years (affected by mobilisation abrasion)
Power capacity: Up to several megawatts
Main Classification
By armour material type
Pure Wteel Wire Armour: High tensile strength but heavier; requires additional protection against seawater corrosion.
Fibre: Light weight, no galvanic corrosion, good fatigue resistance.
Composite Armour: Combination of steel and fibres, balancing strength and weight.
By functional integration type
Power Cable: Power transmission only.
Opto‑Electrical Composite Cable: Power + optical fibre communication.
Related Cable
Comprehensive Functional Cable
power + optical fibre + signal control
This product's specific specification is: steel‑wire armour + aramid fibre reinforcement + optical fibre unit + power conductors + signal control lines.
It is a typical combination of composite armour and a comprehensive functional cable.
