Subsea production systems allow oil and gas to be produced from wells on the seabed, often in deep water and far from fixed infrastructure. Designing safe deepwater subsea systems requires an understanding of field development choices, well equipment, production hardware, controls, risers, flow assurance, intervention and project delivery. This course surveys subsea oil and gas engineering, from developing a field and its subsea wells to manifolds, control systems, risers, flow assurance, intervention, HSE and a deepwater development case study. It explains how regional and water-depth drivers shape development choices, how wellheads and Xmas trees enable safe well operation, how manifold layouts and multiplex controls are arranged, how riser families and flowline interfaces are selected, how flow risks are managed, and how diving and ROV technology support intervention. It closes with lessons from a deepwater development and an outlook on emerging subsea solutions.
Course at a glance: Duration 20 hours · Self-paced online · 11 sections, 20 lessons, a 106-page downloadable course book
What you will learn
- Compare subsea field-development choices across operating regions and water depths.
- Explain how subsea wellheads, drilling support systems and Xmas trees enable safe well operation.
- Evaluate manifold layouts and multiplex control systems for subsea production.
- Compare riser families and flowline interfaces for subsea production systems.
- Analyse flow-assurance risks and processing responses in subsea systems.
- Explain diving and ROV methods for subsea intervention and the project-management and HSE frameworks for subsea work.
- Assess a deepwater field-development case and discuss emerging subsea technologies.
Inside the course: a high-level summary, section by section.
What subsea engineering includes
Subsea engineering covers the design, installation, operation and intervention of equipment placed on the seabed to produce hydrocarbons. Because subsea hardware is expensive to install and hard to inspect or fix, engineers must think about reliability, intervention and the long-term field plan alongside the technical design. The course moves from scope to history to professional purpose, setting the context for the technical sections.
Field development and regional drivers
Field development choices depend on region and water depth. Wells, manifolds, flowlines, risers, controls and export lines appear in every development, but their arrangement varies widely with depth, field size and age, weather, fishing and the seabed. Comparing North Sea and West African practice, the course shows how regional factors drive host selection, layout and system requirements, and why items such as pipelay rates, reel-lay limits, bundles, hydraulic studies and mooring plans must be considered at the start. Burial and protection practice varies with region and line size, and bundles can solve both layout and flow assurance problems.
Wellheads and Xmas trees
The subsea wellhead supports casing strings, maintains sealing and pressure containment and provides the mounting point for flow-control equipment. Equally important is what it does not do: protection from fishing activity is handled by separate structures. Drilling support systems, including the role of drilling mud, are explained. Xmas trees control flow from the well through valves and chokes, and the course compares tree designs, such as vertical and horizontal trees, and the implications for intervention and completion.
Manifolds and controls
Manifolds gather production from multiple wells and distribute injection fluids, and manifold layouts are compared for flexibility, cost and intervention access. Multiplex electro-hydraulic control systems allow many functions to be controlled through a single umbilical, and the course explains how they work, how they receive feedback on valve status and can include chemical injection functions, and why electro-hydraulic multiplex control became the modern subsea control backbone. Design details such as protected mating interfaces on control modules show how hardware is arranged to survive installation and retrieval.
Risers and flowlines
Riser families, including rigid steel risers, flexible risers, hybrid towers and steel catenary risers, are compared for their suitability in different water depths and with different host facilities. Flowline interfaces, including jumpers, spools and connections between subsea structures, are explained, with attention to installation and thermal expansion.
Flow assurance
Flow assurance starts at field development rather than being a late troubleshooting activity: the key concern is keeping production moving from reservoir to host throughout field life, and a complete hydraulic and flow study is how engineers check it. Flow risks such as hydrates, wax, scale, slugging and sand are introduced, along with the processing responses used to manage them, including insulation, heating, chemical injection and subsea processing. The course explains why flow assurance is a central consideration in subsea design.
Intervention: diving and ROVs
Diving methods, including saturation diving, are described along with their depth limits and risks. ROV technology, work-class and observation vehicles with tools and manipulators, is the primary means of deepwater intervention, and the course explains how subsea equipment is designed to be ROV-friendly.
Project delivery and HSE
Subsea projects are complex and capital intensive. Project delivery covers phases, contracting and interfaces, while HSE frameworks address safety management, risk assessment and environmental protection, emphasising that safety is designed in from the beginning.
Deepwater case study and outlook
A deepwater field development, the PSVM project, illustrates layout choices, fabrication lessons and how decisions were made in practice. The course closes with emerging solutions, treated as a discussion of how a new idea should be judged: whether it improves control, installation, intervention or long-term maintenance under real field conditions. A look ahead considers how demand, technological capability and transition pressures, including carbon intensity and the expense of sustaining ageing fields, will influence subsea projects to come.
How the subsystems interact
A recurring message is that subsea subsystems cannot be designed in isolation. Water depth and region influence the choice of host facility, which drives riser selection; the number and spacing of wells shape manifold and flowline layout; flow assurance requirements dictate insulation, heating and chemical injection, which in turn add lines to the umbilical and functions to the control system; and every component must be designed for installation and future intervention. Good subsea design therefore depends on systems thinking and close coordination between disciplines from concept selection onward.
Why this matters in practice
Subsea developments are central to offshore oil and gas, and decisions about them increasingly take account of factors such as carbon intensity alongside cost and recovery. Engineers who understand the full subsea system can contribute to field development planning, equipment selection, interface management and safe operation, and can communicate effectively across disciplines. Because subsea systems are expensive to intervene on once installed, understanding the whole system before decisions are fixed is especially valuable.
Seen as a whole, the course links each piece of subsea hardware to the field-wide decisions it supports, from first concept to late-life operation.
Key takeaways
You leave able to compare subsea field-development choices, explain wellheads and trees, evaluate manifold, control, riser and flowline options, analyse flow assurance and intervention considerations and learn from a deepwater case study.
How you study
The course is delivered fully online and is self-paced, so you can fit roughly 20 hours of study around professional commitments. Lessons combine clear explanation with examples, diagrams and short interactive checks, and the main sections end with graded quizzes (9 in total) so you can confirm you can apply each method before moving on. A 106-page course book can be downloaded and printed for offline reading and later reference.
Course contents
- Field Development: Scope and History; Regional Drivers
- Subsea Wells: Wellheads and Mud; Xmas Tree Designs
- Manifolds and Control: Manifold Layouts; Multiplex Control
- Risers and Flowlines: Riser Families; Flowline Interfaces
- Flow Assurance: Flow Risks; Processing Responses
- Diving and ROVs: Diving Methods; ROV Technology
- Project Management: Project Delivery; HSE Frameworks
- PSVM Case Study: PSVM Layout; Fabrication Lessons
- New Technology: Industry Outlook
- Summary: Key Takeaways
Who this course is for
This course is for engineering graduates, subsea, offshore, mechanical and petroleum engineers and professionals moving into the subsea sector who want a broad understanding of subsea production systems. Basic engineering knowledge is assumed.
Frequently asked questions
How long does Sub Sea Engineering take?
The course is designed for about 20 hours of study. It is self-paced and fully online, so you can spread it over a few weeks or complete it more quickly.
What is covered?
The course is organised into 11 sections with 20 lessons, moving from foundations to applied methods, as summarised above.
Is there material to keep after the course?
Yes. A downloadable 106-page course book accompanies the lessons for offline reading and later reference.
How is progress checked?
Each main section closes with a graded quiz (9 in total). The quizzes test understanding of the concepts and methods explained in the lessons rather than memorisation, and you can review the relevant lessons before attempting them.
Can I record this study for my own professional development?
Yes. The course notebook includes a self-assessment of the course objectives before and after study, a reflection page and a learning log, which you can use to keep your own record of professional development.
Duration: 20 hours
Related courses: F01 – Introduction to Subsea Pipeline Systems; D15 – Pipelines, Moorings, Umbilicals and Risers; D02 – Soil Mechanics Applications; G03 – Oil and Gas Engineering
Enrol
Study at your own pace and work through the full course material, worked examples and section quizzes. Enrol in F02 – Sub Sea Engineering →
Recent Comments