SERVICES

Oil&Gas Services

Logo +NR
Oil and gas engineering services — offshore platforms, FPSO modifications and subsea engineering by +NR

OIL & GAS ENGINEERING SERVICES

We deliver integrated engineering and project solutions for the oil & gas industry, from surface facilities and subsea layout design to FPSO/platform adaptations, process optimization, and low-carbon innovations to support the energy transition.

Onshore Structural Systems

Onshore Structural Systems

Structural engineering for industrial buildings and process facilities, sized for heavy-duty operations and the real loads of oil and gas plants.

  • Engineering and design of industrial buildings and support facilities

  • Structural design for silos, storage tanks, pipe racks, and equipment foundations

  • Civil works for platforms, drainage systems, and site access roads

  • Steel and concrete structures for heavy-duty operations

  • Modular and pre-fabricated building systems for industrial applications

Onshore Production Systems

Onshore Production Systems

Piping, valves and tie-ins for onshore production. Layouts that account for maintenance access, future expansion and operational reality, not just nominal flow.

  • Piping design and layout for process and utility systems

  • Valve stations, manifolds, and pipeline configuration

  • Pipe racks and supports for fluid and gas transport

  • Integration of instrumentation and control systems for surface facilities

  • Tie-ins for gathering, separation, and storage systems

Subsea Structural Equipment

Subsea Structural Equipment

Structural equipment for subsea production fields. We engineer the components that anchor a development on the seabed and survive 25 years of operation.

  • Manifolds, PLEM, PLET, and ILT

  • UTAs (Umbilical Termination Assemblies) and SDUs (Subsea Distribution Units)

  • SSIV bases (Subsea Isolation Valves)

  • Tool baskets and jumper deployment frames

  • ROV tools and intervention equipment

Well Systems

Well Systems

Wellhead and Christmas tree systems for surface and subsea applications, plus workover and intervention equipment that operators actually use day to day.

  • Surface wellheads and Xmas Trees

  • Dry and Wet Xmas trees

  • Workover systems

  • Vertical and horizontal connectors

  • Valves and pipelines

Control Systems

Control Systems

Topside and subsea control systems, sensors and power distribution. The intelligence layer that makes the rest of the field measurable and controllable.

  • Field distribution systems (hydraulic, chemical, power & communications)

  • Subsea control modules and sensor equipment

  • Topside control systems

  • Topside power stations and control cabinets

  • Hydraulic Power Units (HPUs), pumps, and topside distribution systems

Subsea Umbilicals & Risers Systems

Subsea Umbilicals & Risers Systems

Umbilicals and risers for transporting fluids, signals and power between seabed and topside. Configuration, routing and installation engineering for the harshest environments.

  • Umbilical configuration and routing definition

  • Flexible and rigid riser system design

  • Installation planning and field configuration

Subsea Equipment Testing & Inspection

Subsea Equipment Testing & Inspection

Independent third-party verification of subsea equipment before it goes underwater. From factory acceptance testing to in-service inspection plans, we run programs that catch problems on land, not 1,500 meters down.

  • Factory Acceptance Testing (FAT) and System Integration Testing (SIT) programs

  • Pre-installation testing for subsea trees, manifolds and connection systems

  • In-service inspection planning and structural integrity assessment

  • Failure analysis and root cause investigation for subsea equipment

R&D for Oil & Gas

R&D for Oil & Gas

Applied research and development for upstream and downstream operations. We work with operators to qualify new technology, run pilot programs and de-risk innovation before it touches production.

  • Technology qualification programs aligned to DNV-RP-A203 and API standards

  • Pilot and prototype design for new subsea, FPSO and refining technology

  • Joint industry projects (JIPs) and collaboration with universities

  • Digital twin development for production optimization and decarbonization R&D

Oil & Gas

Strategic Design & Quality Assurance in Oil & Gas

01
Oil & Gas

Project Definition & Feasibility

  • Conduct feasibility studies and technical assessments
  • Define scope, battery limits, and compliance with API/ISO standards
02
Oil & Gas

Engineering & System Design

  • Design mechanical, electrical, and subsea systems (FEA/FIV analysis)
  • Develop control systems and umbilical layouts
03
Oil & Gas

Quality Assurance & Execution

  • Implement QA/QC procedures and risk assessment actions
  • Oversee fabrication, testing, and commissioning
How we work

Oil & gas engagements, in practice

How +NR approaches decisions on real oil and gas projects: methodology, scope, technology qualification and trade-offs.

How do you scope a new oil and gas engineering project?

We apply INCOSE stakeholder analysis and concept-of-operations development to understand the operator's actual constraint: is it schedule, capital, regulatory, or operability? The scope follows from there, structured around top-down requirements analysis. A field development driven by an early production date looks very different from one driven by capex limits. Getting this clear in the first 2 weeks through structured gate reviews avoids 80% of the rework that happens later.

What does +NR do differently in FPSO modification projects?

We apply INCOSE V-Model verification and validation against the existing hull and systems as immovable constraints, designing new modules to fit within them through design readiness reviews. This sounds obvious, but most FPSO modifications run over budget because new equipment is sized for ideal layouts and then forced into available deck space. Our requirements traceability discipline ensures we size for what is actually there from day one.

How do you approach mature field revitalization?

Field maturity is not a technical problem, it is an economic one. We apply INCOSE trade studies to model the remaining production profile against capex, opex and decommissioning timelines, then engineer interventions that pay back inside the production envelope. Sometimes that means new wells; often it means optimizing what is already there. The engineering follows the economics through structured value engineering, not the other way around.

When do you recommend subsea equipment testing programs?

Always before installation, and selectively in service. We apply INCOSE V-Model V&V principles: Factory Acceptance Testing catches manufacturing issues, System Integration Testing catches interface problems between subsystems. In-service inspection makes sense for components with known degradation modes (umbilicals, flexible risers, mooring lines), less so for static equipment that rarely fails. Choosing where to spend inspection budget is part of the engineering trade study.

How does +NR run R&D for oil and gas operators?

Through structured technology qualification programs aligned to DNV-RP-A203 or API 17N, with clear INCOSE-style gates between TRL stages. We work with operators to define the qualification target, design test programs, run pilots and document evidence within an ISO 9001:2015 quality system. The output is something an operator can present to internal review boards and put on a production asset, not a research paper.

What is the typical engagement model for oil and gas: study, FEED, EPCM, or all of them?

Most engagements run as either FEED (Front-End Engineering Design, 4 to 9 months, INCOSE-structured) or EPCM (12 to 36 months, PMBOK-managed). Conceptual studies are 6 to 12 weeks. Operators that engage the same team across FEED and EPCM tend to see less rework, because design intent is preserved through V-Model verification. We work in any configuration the operator needs, with the same methodology applied consistently.

How does +NR apply INCOSE and PMBOK in oil and gas projects?

We use INCOSE Systems Engineering as the design discipline (requirements traceability, V-Model verification and validation, MBSE, FMEA for risk-critical components) and PMBOK as the project management discipline (WBS, performance baselines, change control boards). Continuous improvement is governed through CMMI and ISO 9001:2015. The combination is what we call the +NR methodology, described in detail on our methodology page, and it is applied identically to subsea, FPSO modifications, mature field revitalization and downstream R&D engagements.