Subsea Systems, Pipelines and Risers
Reinertsen New Energy has more than 40 years of experience from engineering of subsea infrastructure.
Reinertsen New Energy provides engineering services including well systems, subsea production facilities, subsea infrastructure and transport to the receiving facilities offshore or onshore.
Reinertsen New Energy is an independent supplier of services to the oil and gas companies in the following areas:
Systems engineering: Subsea Umbilicals, Risers and Flowlines (SURF) and Subsea Production Systems (SPS).
Field architecture and routing of subsea lines.
Flow assurance.
Engineering and design of subsea systems, pipelines and risers.
Materials selection, corrosion and cathodic protection.
Seabed intervention and pipeline protection.
Installation and Tie-ins.
Landfall design.
The role as “Owner’s Engineer", performing project support, independent engineering studies and verification work.
ConocoPhillips 2024 – 2025
Power from Southern North Sea 2 (Sørlige Nordsjø 2)
The SURF Design FEL-2 study investigated possible solutions for routing, installation and tie-in of subsea power cables connecting Ekofisk and Eldfisk Complexes to the SNII Wind Farm.
The work included:
Input to Design Basis and Functional Spec for subsea cables
Layout and route design including platform approach
Identify and describe all crossings and crossing design
Trenching and rock installation solution for selected route
Subsea cable stability and in-place design
Evaluation of interaction and interference with live assets
Evaluation of installation and tie-in methods
Cable pull-in design / suitability of nominated J-tubes.
Dropped object assessment and protection design
Input to Material Take Off
Input for crossing agreements.
Input for environmental impact assessment
ConocoPhillips 2023 – 2025
Previously Produced Fields (PPF)
Concept development and Pre-FEED of the subsea tie-back of West Ekofisk, Albuskjell and Tommeliten Gamma to Ekofisk Z.
The work included:
Systematic evaluation of potential development concepts
Perform sufficient engineering to recommend SPS concepts
SURF engineering
Flow Assurance
Materials engineering and CP-design
Cost and schedule estimates
System design responsible
Follow-up of EPCI contractors
Design verification
Vår Energi 2023 – 2025
Beta & Dugong
We provide owner’s engineering services in early project phases for the subsea tie-back of the Beta & Dugong fields to the Snorre field.
Reinertsen New Energy is integrated in company’s project team to cover technical advisory services within Subsea Umbilicals, Risers and Flowlines (SURF), and within Subsea Production Systems (SPS)
ConocoPhillips 2019 – 2025
Tommeliten Alfa
Pre-FEED, FEED and detail engineering & follow-up of the Tommeliten Alfa subsea tie-back project:
System design responsible
SPS design (Template, Xmas tree system, Control system, manifold system, Subsea HIPPS, Tooling)
SPU system (Separation technology, Flow measurement, Pump design)
SURF design (Field layout, Flowline design, Umbilical design)
Flow Assurance design
Evaluation of available J-tube solutions
Cost and Schedule estimates
Follow-up of EPCI suppliers
Vår Energi 2019 – 2025
Gjøa Subsea Projects
Reinertsen New Energy is providing the necessary technical expertise and resources required to secure handling of Vår Energi’s technical responsibilities as operator for the Gjøa Subsea Projects, i.e. P1&Duva, Gjøa Nord, Ofelia and Cerisa.
SPS advisor in the project team
SURF advisor in the project team
Material advisor in the project team
System engineering
Review, verifications and follow-up of study contractor’s work (SURF & SPS)
Pipeline corrosion evaluations
Shell (Norway) 2017 – 2025
Ormen Lange Phase 3 – FEED, Post-FEED and Detail Design
Landfall design (Landfall trench, Umbilical pull-tubes w/bellmouth and endcaps)
Field layout design
Pipeline routing and design, expansion and VIV analyses, and input to ECA
Umbilicals routing from Nyhamna to the field, 2x120 km
Umbilicals bottom roughness and free span analyses
Protection and Seabed intervention design; Pre-lay and Post-lay Rock installation vs. Trenching
Geotechnical engineering of all Seabed intervention work
Follow-up of subsea rock installation work
Follow-up of trenching operations
Assurance support; review of manufacturing documents and procedures, follow-up of procurement, qualifications and fabrication activities
Interface management
Chevron/Vipo 2022 – 2024
Janz-Io Compression / Retrofit insulation
The Jansz-Io Compression retrofit insulation scope involved retro fitting of thermal insulation to the existing and operating 30” export spool between the Jansz MPTS and the Jansz PLET at a water depth of ca. 1350 m.
The overall work scope included the engineering and qualification of a suitable ROV installable, and recoverable retrofit insulation system, which enables management of localized internal condensation with risk of localized corrosion through the provision of thermal insulation.
Suitable thermal insulation covers designed for the different spool sections. The scope covered the qualification of a suitable retrofit thermal insulation subsea system, as well as securing that the CP system will be functional during the remaining lifetime of the spool after retrofit insulation.
Reinertsen New Energy was responsible for the engineering design including Thermal Analysis, CP Analysis, Structural Analysis, Installation Analysis, and the Monitoring requirement study.
Neptune Energy 2017 – 2022
Fenja project
Reinertsen New Energy provided the necessary technical expertise and resources required to secure handling of Neptune Energy's technical responsibilities as development operator from the Front End Engineering Design (FEED) phase throughout the Fenja project execution phase (EPCI).
The work included:
System engineering
Lead SURF engineer
Lead Pipelines engineer
Lead Material engineer
Technical safety
Risk Based Inspection Program
Technical support and verification activities
Follow-up of EPCI-contractor (SURF & SPS)
Offshore surveillance
Quality & Audit support
Seabed Separation AS 2018
Dual pipe separator
Development of an installable concept for a subsea dual pipe separator.
The work has been an early phase assessment of system design, equipment needs and assessments of the extent of marine operations.
The separation system includes the flexibility to contain several equipment packages depending on specific field requirements, both in relation to fluid capacity and the need for water injection and/or multi-phase boosting.
Woodside 2017
Browse Field Development
Concept select phase Browse Field Development:
Our scope of work included:
Confirm technical feasibility of DEH for Calliance/Breaknock and Torosa subsea flowlines
Provide sufficient equipment details, functional descriptions, weights and dimensions.
Establish a Class 1 cost estimate.
Identify any risks or opportunities associated with DEH systems for the Browse facilities.
ConocoPhillips 2017
Ekofisk Water Injection (EKOVC)
Engineering Services related to the EKOVC water injection project including preparation of project design basis and project specifications.
The work also comprised design document review, design verifications and procurement support for CPI deliveries.
TechnipFMC 2017
Luno II Trawl Assessment
Support to TechnipFMC on the FEED for the Luno II – Value Engineering.
Four satellite wells on the Luno II field (2 production and 2 WI) are planned to be tied-back to the Edward Grieg platform (20 km).
Our scope of Work included a Trawl Assessment study evaluating the trawl interference of the Umbilical and Gas lift lines (i.e. impact, pullover, hooking) and the protection requirements.
Statoil 2011 – 2015
Åsgard Subsea Compression
Detail design of the subsea pipeline system. The work started with a refinement and update of the FEED results from 2010.
The scope comprised overall layout, routing and design of flowlines, MEG lines, power cables, umbilicals and fiber optical cable (FOC) to/from the compressor station, existing templates/PLEM’s, hot-taps on the Midgard loop and Åsgard A and B, including all associated seabed intervention work.
Further design of all tie-ins and expansion spools (21 off), PLEM/PLET/Riser Base structures (19 off) and verification of the compressor manifold station (SCMS).
A new spool design guideline to be developed as part of the project in cooperation with DNV.
Development of MTO’s, input to ITT’s and assistance to Company with contracts for prefabrication of structures and installation of lines and structures, and follow-on engineering services during the fabrication and installation phases.
ConocoPhillips 1995 – 2015
Ekofisk Area Frame Agreement
Frame agreement covering all phases of SURF projects in the Ekofisk Area:
1995 – 1997 Ekofisk II verification
1997 Eldfisk Water Injection Detail Engineering
1997 Ekofisk II Fuel gas line – Detail Engineering
1997 – 1999 Ekofisk II/Eldfisk – Basic Engineering
1999 – 2000 H7 Subsea Bypass – Concept & Basic Eng
2003 – 2005 FTP Bypass – Detail Engineering
2006 Eldfisk Upgrade – Detail Engineering
2006 Eldfisk 2 – Conceptual Study
2009 – 2009 Norpipe B11 Bypass – Detail Engineering
2009 Norpipe Looping – Conceptual Study
2012 – 2013 Tor II – FEED Study
2013 – 2014 Tommeliten Alfa – Conceptual Study
2013 Norpipe / Teeside – Conceptual Study
2015 Tommeliten Alfa – FEED Study
Wintershall 2013 – 2014
Maria Subsea FEED
The Maria subsea facility is tied via rigid flowlines and flexible risers to Kristin with gas lift being supplied from Åsgard B via Tyrihans and Sulphate reduced sea water supplied with injection pressure from Heidrun.
The Maria Subsea FEED project covered the following engineering activities included:
System Engineering
Flow Assurance
SPS System; X-mas trees, manifold, workover
Control System
Pipeline System
Pipeline components (SSIV, PLEMs and PLETs)
Riser System
Umbilical System
Cost & Schedule
BP Norge 2005 – 2014
Skarv Field Development
Evaluation for location of FPSO
Number of and size of flowlines
Flowline and Export pipeline route alternatives
Concept evaluation of expansion control. Perform bottom roughness analyses and fatigue assessment of pipeline free spans. Evaluate requirements and methods for mitigation of free spans. On-bottom stability analyses
Corrosion allowance evaluation. Material Evaluation. Initiate comprehensive test program (Sintef/Bodycote) to support Flowline material selection
Wall thickness and stability calculations of all piping
Bundle vs. Single line evaluation (price estimates, risk and interv. design)
Complete schedule / Budget for fabrication and installation
ITT technical input (e.g. piping; material, fabrication and installation)
Assisted in material purchase in Germany and Japan
DEH at Sintef; dimensioning of cable
Seabed intervention and estimation of rockdump infill volumes
Statoil 2007 – 2010
Ormen Lange Southern Field Development
Tie-back of Template D to the Phase I gas transportation pipelines going to the Nyhamna onshore process facilities.
The flowline system includes 2 x 16” production lines, a 6 5/8” MEG line and a control umbilical. Each line is 13 km long.
The development area is in 850 m water depth and the seabed is very irregular with very soft clay and stiff clay features.
Detail and follow-on engineering design for flowlines, umbilicals and protection structures.
Main topics included:
Field lay-out architecture and flowline routing
Flowline and coating design
Pipe–soil interaction definition
Free span, fatigue and expansion design
Tie-in spool design
Seabed intervention design (excavation, rock dumping, jetting)
CP design
HSE engineering including dropped object analyses
Lead interface
Offshore supervision and onshore duty service
