Subsea Oil & Gas Umbilical Cable | Deep‑Water Steel Tube Umbilical for FPSO & Subsea Tree

Deep sea oil and gas dedicated umbilical cable | Shanghai Deru Cable Manufacturer

Specification

Basic Structure	Conductor+Insulation+Jacket+Hose
Conductor	Plain Copper/ Tinned Copper
Insulation	PE
Braid	Kevlar/ Plain Copper/ Tinned Copper
Jacket	PUR/TPE/PCP

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INTRODUCTION

Shanghai Deru Cable, China — As offshore oil‑gas exploration continues moving toward ultra‑deep‑water zones worldwide, reliable subsea umbilical systems become critical infrastructure linking floating production storage and offloading (FPSO) units, semi‑submersible platforms and fixed offshore platforms to subsea production equipment, including subsea trees, subsea manifolds and subsea control modules. Our advanced steel tube umbilical delivers integrated power, fiber‑optic data transmission, hydraulic actuation and chemical injection functions for long‑term offshore field operation.

Subsea Oil

H2: What Is a Steel Tube Subsea Umbilical for Deep‑Water Oil & Gas

A subsea oil & gas umbilical cable, widely known as steel tube umbilical (STU), acts as the “lifeline” of subsea oil‑gas development projects. Unlike ordinary marine cables, this composite umbilical integrates multi‑functional units inside one cable assembly: electrical power cores for subsea equipment power supply, optical fibre units for real‑time signal communication, high‑pressure steel tubes for hydraulic control, and additional steel tubes dedicated to chemical injection such as methanol, corrosion inhibitor and scale inhibitor, preventing hydrate formation and internal corrosion in subsea pipelines.

Two main configurations are available for site conditions: dynamic subsea umbilical and static subsea umbilical. Dynamic sections suspend in seawater, enduring cyclic ocean current load, wave‑induced tension and repeated bending fatigue during 25‑year service life. Static umbilical sections lie on seabed, designed for stable buried or laid‑on‑seabed installation.

Subsea Oil

H2: Key Technical Specifications & Compliance Standards

Our deep‑water steel tube umbilical is engineered for water depth up to 3000 m, meeting strict offshore industry standards API 17E and DNV‑ST‑F101 for subsea umbilical systems.

Service water depth: up to 3000 m ultra‑deep‑water
Design service life: minimum 25 years
Working environment: resistant to seawater, H₂S and CO₂ corrosive medium
Core functions: power transmission, fiber‑optic control signal, high‑pressure hydraulic driving, chemical injection
Structural type: dynamic umbilical for suspended riser section; static umbilical for seabed routing
Manufacturing acceptance: Factory Acceptance Test (FAT) before delivery

Steel tubes adopt high‑corrosion‑resistant alloy material to handle harsh sour‑gas reservoir environment. Electrical conductors are insulated with seawater‑resistant elastomer. Optical units apply hydrogen‑resistant single‑mode fibre to avoid signal degradation under long‑term deep‑water hydrostatic pressure. Outer sheath uses high‑performance marine‑grade polymer against abrasion and marine organism attachment.

Subsea Oil

H2: Typical Application Scenarios

The subsea steel tube umbilical is extensively deployed for global deep‑water offshore projects:

FPSO connected to subsea tree and subsea manifold
Semi‑submersible platform subsea production system
Fixed offshore platform deep‑sea oil‑gas field development
Subsea control module remote monitoring & actuation
Hydraulic valve operation and chemical injection for subsea wellheads

Engineers select dynamic steel tube umbilical when cables hang freely in the water column subject to ocean current movement, while static umbilical is chosen for seabed‑laid routes without large cyclic displacement.

Subsea Oil

H2: Custom Engineering & Project Delivery

Each deep‑water subsea umbilical is a custom‑engineered product. Our engineering team configures quantity and dimension for power cores, optical fibres, hydraulic steel tubes and chemical injection tubes according to project water depth, operating pressure, distance and field corrosive conditions. Complete FAT testing is implemented before shipment to verify electrical performance, hydraulic tightness, optical attenuation and mechanical integrity.

As deep‑water oil‑gas activities expand across South‑East Asia, West Africa and South America offshore basins, qualified steel tube umbilical suppliers play an important role for project schedule and long‑term field safety. We provide full‑cycle support including design review, manufacturing, factory testing, technical documentation and after‑sales consultation for global EPC operators and offshore contractors.

Subsea Oil

H2: Conclusion

Robust API‑qualified subsea oil & gas umbilical cables are irreplaceable for modern ultra‑deep‑water exploitation. Dynamic and static steel tube umbilical solutions guarantee stable power supply, reliable communication, precise hydraulic control and continuous chemical injection for FPSO and subsea tree systems over decades‑long operation.

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ADVANTAGES

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FAQ

Q: Is Derul Cable the original manufacturer?

A: Derul Cable is a special cable manufacturer. Our factory is based in Shanghai.

Q: Is the price negotiable?

A: Yes, the price is negotiable. Our price is also flexible due to several factors including purchase quantity.

Q: What is the regular MOQ for your cable?

A: Any quantity is okay to purchase for product at stock. For product with no stock, its MOQ is usually 100-200 meters per type.

Q: How can I get sample?

A: Usually you only need to pay the express freight, and after your confirmation of the product dimension and structure, we can arrange the sample and send it directly to you.

Q: Is OEM or ODM service available?

A: OEM and ODM services are both available. You can provide us with your requirement for the product and we will evaluate it to push forward.

Q: What is the regular production time?

A: For regular quantity, it usually costs about 15-25 days to produce.

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