Design Of Subsea Pipelines And Risers

Overview of subsea field development

Functions and types of subsea pipelines and risers

Key terminology and definitions

Field layout considerations and system configurations

Introduction to industry codes (DNV-ST-F101, DNV-RP-F105, API RP 1111, ISO 13623)

Regulatory requirements and environmental compliance

Design documentation and verification processes

Design basis and data collection (environmental, operational, geotechnical)

Pipeline route selection and seabed survey considerations

Wall thickness design and pressure containment

Stability on the seabed (on-bottom stability analysis)

Thermal expansion and upheaval buckling

Types of risers: flexible, rigid, hybrid

Riser configurations: SCR, lazy wave, steep wave, free-standing

Riser response to environmental loading (waves, currents, vortex-induced vibration)

Dynamic analysis principles and fatigue design

Riser design case studies

Pipeline and riser material selection (carbon steel, CRA, flexible materials)

External and internal corrosion mechanisms

Corrosion protection: coatings, cathodic protection, corrosion inhibitors

Flow assurance and chemical injection considerations

Hydrodynamic loading: wave, current, and vortex-induced vibrations

Geotechnical interaction: soil-pipe interaction, trenching, and burial

Free span analysis and mitigation techniques

Heat transfer and insulation

Pipeline cooling/heating

Hydrate and wax management

Slugging and multiphase flow considerations

Overview of pipeline and riser installation techniques

Riser installation methods and challenges

Design for installation: allowable stresses, loads, and fatigue

Installation aids: PLETs, PLEMs, buoyancy modules

Common failure modes: corrosion, fatigue, mechanical damage, buckling

Inspection, monitoring, and maintenance strategies

Emergency response and repair techniques

Integrity management systems and documentation