Top 10 Offshore Pipeline Companies Powering Global Energy Infrastructure

The offshore pipeline network, one of the most important parts of the global energy system, is located beneath the ocean’s surface. These enormous undersea pipes connect offshore production sites to refineries and distribution centers while discreetly moving gas and oil across continents. The market for offshore pipelines is receiving more attention as offshore exploration grows and energy consumption keeps rising.

What are Offshore Pipelines?

The term “offshore pipelines” refers to a specific way that fluids, including water, gas, and oil, can be efficiently transported from subsea wells to production facilities and eventually to shore. These pipelines can adapt to different conditions and guarantee required flow rates by using different wall thickness and sizes.

In order to limit any negative impacts from the perspectives of technical, business, environmental, and societal aspects, risk management is necessary during the design, construction, and operation of offshore pipelines. In tandem with the pipeline industry’s efforts to meet the challenges of expanding application into deepwater environments and ice regimes, as well as the ability to achieve more extreme operating conditions such as internal pressure, temperature, and aggressive fluids and envelopes such as transient, cool down, and restart conditions, the necessity, scope, requirements, and complexity of risk management have changed over time.

Fortune Business Insights estimates the market for offshore pipeline to grow from USD 13.21 billion in 2025 to USD 20.58 billion by 2034, with a significant CAGR of 5.01% over the forecast period.

Fortune Business Insights Reveals its Top 10 Offshore Pipeline Companies

1. Subsea 7

With its headquarters in London and a listing in Luxembourg, Subsea 7 is a multinational offshore engineering firm that provides EPCI (engineering, procurement, construction, and installation) for subsea oil, gas, and energy-transition projects. Its offshore pipeline offering focuses on SURF work, which includes the design and construction of export pipelines, infield flowlines, pipeline-end manifolds, and tie-ins employing J-lay/S-lay vessels and rigid/flexible pipe. In order to become a larger subsea business, the corporation also announced a merger with Saipem in July 2025.

2. Saipem

Founded in 1957, Saipem is an international oilfield services company with headquarters in Milan, Italy. Complete EPCI of subsea trunklines, flowlines, and export pipeline-48-inch trunklines, J-lay/S-lay installation, fabrication yards, and a fleet of Saipem 7000, Castorone, and FDS vessels are provided by its offshore pipeline division. Aramco’s USD 500 million grant in February 2025 for a 48-inch trunkline at the Safaniya field, which will be built using regional construction ships and local Dammam fabrication, is a significant step.

3. McDermott International

A Houston-based engineering and construction firm, McDermott International performs integrated EPCI for energy-transition, LNG, and offshore oil and gas projects, including pipelines, SURF, and production facilities. Offshore flowlines, export lines, and cables placed by its S-lay/reel-lay fleet-more than 900 km recently laid in the Middle East are all included in its pipeline portfolio. Following an East Malaysia gas-lift project, PTTEP awarded a contract in September 2025 for Block H gas-field expansion in Malaysia to install a subsea-pipeline, umbilicals, and risers feeding the PFLNG DUA facility.

4. Heerema Marine Contractors

Based in Leiden and established in 1948, Heerema Marine Contractors (HMC) is a Dutch offshore contractor most recognized for its heavy-lift ships, which are used for the transportation, installation, and removal of platforms and undersea pipes. Deepwater export lines, flowlines, risers, and SURF tie-backs placed by deepwater construction vessels are among its pipeline-related tasks. The firm in January 2025 announced fleet upgrades to support deeper SURF/pipeline tie-ins.

5. Petrofac

Founded in 1981, Petrofac is a London-based energy services company that provides operational support and EPC for oil and gas and new energy projects. As part of a larger gas processing scope, its offshore pipeline work falls under the EPC/offshore Projects & Operations section and includes FEED, onshore/offshore line design, procurement, installation, and commissioning/trunklines, feeder lines, and brownfield tie-ins. While maintaining core offshore pipeline capabilities, the company is also shifting to new-energy EPC (hydrogen, CCS, offshore wind).

6. Larsen & Toubro (L&T)

Larsen & Toubro (L&T) is a Mumbai-based Indian multinational formed in 1938, one of the world’s major engineering-consulting and EPC companies. With over 50,000 employees altogether, it leads the Indian hydrocarbon infrastructure sector and provides onshore and offshore pipes, platforms, refineries, and renewable energy projects through its Energy Hydrocarbon vertical. The firm increased its pipeline presence in India and the Middle East in March 2025 when it acquired QatarEnergy’s North Field compression EPC, which consists of onshore and offshore pipes and is valued at approximately USD 4 billion.

7. China Offshore Oil Engineering Co., LTD. (COOEC)

CNOOC controls the Tianjin-based engineering contractor China Offshore Oil Engineering Co., LTD. (COOEC), located in Shanghai. It is the only significant offshore EPCIC company in China, having been established in 1994 using CNOOC assets. For offshore platforms and SURF, COOEC develops, acquires, and installs subsea pipelines and cables. The Hai Yang Shi You 201 pipelayer has been used to lay more than 1,500 kilometers.

8. National Petroleum Construction Company (NPCC)

As a division of the NMDC, National Petroleum Construction Company (NPCC) was established in 1973 and has its headquarters in Abu Dhabi. The company uses 22 vessels to design, acquire, and build platforms, subsea cables, and offshore/onshore pipelines. It obtained ONGC’s Ratna EPC contract in July 2023, and it is still working on pipeline replacement projects for ADNOC, supporting offshore infrastructure in the Middle East and India.

9. TechnipFMC

Founded in 2017 and headquartered in London, TechnipFMC develops, acquires, fabricates, and installs rigid and flexible subsea pipes. In 2025, it won new flexible-pipe contracts from Petrobras and continued reel-lay operations.

10. John Wood Group PLC

Founded in 1982 and based in Aberdeen, Wood Group provides upstream and midstream clients with FEED-to-decommissioning services by designing, engineering, and operating offshore and transition pipelines with Virtuoso monitoring and Iris Edge robotics.

Offshore Pipelines in a Changing Energy Landscape

The offshore pipeline industry’s future is strongly correlated with developments in the energy transition, offshore energy investment, and technological development. It is anticipated that pipelines will improve in resilience, be digitally monitored, and be tailored for deepwater uses. In addition to lowering lifespan costs, improved inspection and maintenance technology will increase safety.  Moreover, demand for offshore pipelines is predicted to stay high as new gas projects come online and offshore output keeps growing. Deepwater developments, the extension of gas infrastructure, and innovation in pipeline engineering and monitoring will all contribute to long-term market growth.