Company directory

NOV

Texan maker of rig machinery, drill pipe, pumps and valves for well construction and production work, quoted in New York, with second-quarter 2026 revenue of USD 2.13 billion.

oilfield-servicesequipment-suppliers

Nabors Industries

Bermuda-registered land drilling contractor with Houston operations, running rigs in the Lower 48, the Middle East and other international markets alongside rig equipment and automation lines.

drilling-contractorsoilfield-servicestechnology-software

Nakilat (Qatar Gas Transport Company)

Doha-headquartered LNG shipping company that owns and operates one of the world's largest liquefied natural gas carrier fleets and provides marine services in Qatar.

logistics-marine

Nel

Norwegian electrolyser manufacturer supplying alkaline and PEM hydrogen production equipment and fuelling technology to industrial and energy projects worldwide.

equipment-suppliersrenewables-transition

Neste

Finnish refiner that has become the world's largest producer of renewable diesel and sustainable aviation fuel, with oil products still made at Porvoo.

refining-petrochemicalsrenewables-transition

Netherland, Sewell & Associates (NSAI)

Dallas petroleum consultancy founded in 1961 that prepares independent reserves reports and technical evaluations for oil and gas companies, financial institutions and governments.

engineering-consulting

NextEra Energy

Owner of Florida's main electric utility alongside a vast wind, solar and battery portfolio, with about 110 gigawatts of generation and a New York listing.

power-utilitiesrenewables-transition

OPEC (Organization of the Petroleum Exporting Countries)

Intergovernmental organisation of 12 oil-exporting countries headquartered in Vienna, coordinating production policy and publishing oil market research.

government-associations

OPITO

Aberdeen-headquartered, industry-owned skills body that sets offshore safety and competence standards, including the BOSIET and HUET survival training taken by offshore workers.

training-certification

Oando

Lagos-headquartered West African oil producer and commodity trader quoted on two exchanges, holding stakes in upstream blocks plus a crude offtake book.

exploration-productiontrading-marketing

Occidental Petroleum

Houston-based oil and gas producer with Permian and Gulf of Mexico output, Middle East and Latin American interests, midstream assets and a carbon venture.

exploration-productionmidstream-pipelines

Oceaneering International

Houston-based engineered services and products group supplying ROV and subsea operations, inspection and integrity work to offshore energy and other industries.

subsea-servicesinspection-ndt

Orion Group

Highland staffing agency founded in 1987 that places engineers, trades and offshore crews with energy, utility and infrastructure employers in 68 countries.

recruitment

Orlen

Poland's largest listed energy group, refining crude oil and selling fuel through thousands of service stations while building gas, power and renewables capacity.

refining-petrochemicalsexploration-productionpower-utilities

Ormat Technologies

Nevada-based geothermal power producer that designs, manufactures, builds and operates geothermal and recovered energy plants and runs battery storage assets.

renewables-transitionpower-utilitiesequipment-suppliers

PTT

PTT Public Company Limited, formerly the Petroleum Authority of Thailand, is a Thai state-owned SET-listed oil and gas company established in 1978 and headquartered in Bangkok. It operates an integrated petroleum and petrochemical business from upstream to downstream.

exploration-productionmidstream-pipelinesrefining-petrochemicals

PTTEP

Thailand's listed upstream petroleum company, producing gas and liquids in the Gulf of Thailand and holding exploration and production interests in Asia and the Middle East.

exploration-production

Patterson-UTI Energy

Houston-based oilfield services group providing land contract drilling, well completion and directional drilling services across US basins and selected markets abroad.

drilling-contractorsoilfield-services

Pembina Pipeline

Calgary-based midstream company running about 18,000 km of pipelines and 6.3 Bcf/d of gas processing capacity in Western Canada, with interests in Alliance and Cedar LNG.

midstream-pipelines

PetroSkills

Tulsa-based oil and gas training provider delivering classroom, virtual and online technical courses plus competency management for upstream, midstream and downstream staff.

training-certification