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Oilfield Services Companies in London: 200+ Active Firms (2026)
Oilfield services companies in London provide engineering, well, subsea and asset-support services for upstream energy projects.
Buying centres in this London cohort cluster around offshore operators, asset owners and prime contractors that need engineering capacity, well support, subsea and pipeline expertise, inspection, maintenance and asset-support services. The buyer is usually technical or operational rather than a general corporate function, with procurement shaped by project risk, certification, mobilisation needs and familiarity with the UK Continental Shelf. Engagements tend to be scoped as project packages, framework call-offs or specialist workstreams; smaller advisory jobs exist, but the better-matched suppliers are those able to support mature-basin work, late-life assets, decommissioning, emissions reduction and energy-transition infrastructure.
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London has 285 actively trading oilfield services firms, including 22 with turnover above £5M and 43 incorporated since 2022. The reported employment footprint is 831 people, which fits a supplier base of specialist engineering, inspection and asset-support teams rather than labour-heavy operators. London’s role is not simply geographic proximity to fields; it also reflects head-office, finance, legal and commercial functions that sit close to upstream decision-makers while operational delivery links back to offshore energy work on the UK Continental Shelf.
Service providers sit inside the UK upstream oil and gas regime rather than a standalone licensing regime for suppliers. The NSTA regulates offshore petroleum licensing and consents, including exploration, development, wells, production consents, pipeline works authorisations, and flaring and venting controls. That matters commercially because suppliers often inherit compliance requirements through operator contracts, method statements and project assurance processes. The remit also now reaches adjacent energy-transition infrastructure, including carbon dioxide storage and offshore hydrogen transport by pipeline and storage, so some oilfield services work is moving into mixed hydrocarbon and transition-project environments.
London’s cohort appears likely to remain more project-services than product-led. Demand tends to follow late-life asset support, decommissioning preparation, emissions control and adjacent offshore infrastructure, all of which favour suppliers with domain knowledge and documented operating procedures. Many smaller firms may stay intentionally specialist, selling expertise into operator and contractor chains rather than building broad service portfolios. Consolidation remains plausible where customers want fewer interfaces and clearer accountability, but the market also leaves room for niche consultancies and inspection-led teams that can adapt to changing consent, safety and assurance expectations.
285
Active firms
2026
22
Above £5M turnover
London cohort
43
Incorporated since 2022
London cohort
Key facts
About 7% of the trading cohort reports turnover above £5M (22 of 285 firms) — the rest sits below that revenue band.
15% of the cohort was incorporated since 2022 (43 firms), so a sizeable share is in its first few filing cycles.
Service providers sit within the UK upstream oil and gas regime; the North Sea Transition Authority regulates offshore petroleum licensing and consents for exploration, development, wells, production, pipeline works, flaring and venting.
The Energy Act 2016 provides the statutory review framework for offshore petroleum and carbon dioxide storage, with the remit expanded in September 2023 to include offshore hydrogen transport by pipeline and storage.
The NSTA’s 2025 review refers to net zero obligations, a 50% production-emissions reduction target by 2030 against a 2018 baseline, and tighter enforcement for flaring and venting consent exceedances.
Offshore energy supports over 150,000 direct and indirect jobs in 2024, with almost 80% of current offshore energy jobs in oil and gas.
The UK Continental Shelf is a mature basin: 47.7 billion boe had been produced by the end of 2024, while proven and probable reserves stood at 2.9 billion boe.
Top London oilfield services companies
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsProvides offshore oil and gas support services including marine vessel operations, shipbuilding and rig conversion, offshore construction, drilling and workover services, and well interventions such…
Serves B2B customers in the global energy sector, primarily oil and gas operators and offshore/maritime companies involved in drilling, well operations, construction, decommissioning and carbon…
Financial Health
HealthyHealthy · Profitable · 6% CAGR over 1y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides well integrity management services for the oil and gas industry, including well integrity testing and monitoring, data collection, risk analysis, and technical reporting. Also delivers…
Serves upstream oil and gas companies, well operators and energy asset teams managing well integrity risks, surface casing vent flow issues, regulatory reporting and emergency well control needs.
Financial Health
StableStable · -37% CAGR over 4y
Location
PEGASUS INTERNATIONAL(UK) LTD
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides engineering and project management services for the energy industry, including design and engineering of land and offshore pipelines, subsea systems, umbilicals, process facilities,…
Sells to businesses in the energy sector, especially oil and gas companies needing engineering and project support for pipelines, subsea, offshore, process facilities, automation and related…
Financial Health
StrongStrong · 0% CAGR over 1y
Location
Consub Property Investments Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides engineering and project management services for energy projects, including offshore and onshore oil and gas developments, pipeline transmission systems, asset decommissioning, and renewable…
Serves B2B energy-sector clients, including oil and gas operators, pipeline and offshore/onshore development teams, decommissioning asset owners, and renewables developers requiring engineering and…
Financial Health
StrongStrong
Location
Owns and operates offshore support vessels and subsea assets providing marine management, subsea inspection, maintenance and repair (IMR), light construction, and offshore operations services for…
Serves offshore energy producers and operators, including oil and gas and renewable/floating wind project owners, needing subsea, offshore operations and marine support across the energy lifecycle.
Location
Provides inspection, non-destructive testing (NDT), and asset integrity management services for offshore energy infrastructure, including subsea inspection, remotely operated vehicle (ROV)…
Serves enterprise and government customers in oil and gas, renewable energy, material handling and logistics, autonomous transit, aerospace, defense, and science and research sectors.
Location
INDEPTH INTERNATIONAL LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies equipment and technical personnel for offshore and subsea operations. Provides remotely operated vehicles (ROVs), diving systems and survey equipment for sale or rental, and delivers…
Serves B2B customers in the offshore and marine sectors, including international operators and contractors running subsea, hydrographic survey, ROV, diving, pipeline, cable lay and inspection…
Financial Health
StableStable · -67% CAGR over 3y
Location
THREE60 ENERGY LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides engineering, consultancy and project services for the energy sector, including subsurface analysis, well engineering, subsea inspection and maintenance, and EPCC support. Also manufactures…
Serves B2B energy-sector clients, including major oilfield operators, offshore and onshore asset owners, new entrants, and companies in oil and gas, renewables, CCS, marine, defence and nuclear…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 2y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides offshore engineering and maintenance services for drilling contractors, specialising in subsea blowout preventer (BOP) systems and well control equipment. Services include inspection,…
Serves B2B offshore drilling contractors and rig operators using platforms, jack-ups, semi-submersibles and drillships in global offshore oil and gas markets.
Financial Health
StableStable · 0% CAGR over 2y
Location
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsProvides engineering consultancy, project support and technical training for energy industries including oil and gas and energy transition sectors. Services cover subsea pipelines, integrity…
Serves energy-sector companies and engineering professionals in oil and gas, subsea pipelines, offshore wind, hydrogen and carbon capture, including teams responsible for integrity, decommissioning,…
Financial Health
DistressedDistressed · -50% CAGR over 1y
Location
Subtec Pro Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides subsea engineering and project management services for offshore oil and gas drilling operations, including well control equipment inspection, BOP stacking and reactivation, riser inspection…
Serves oil and gas companies and drilling contractors running subsea drilling projects, including teams responsible for well control, BOP, riser and offshore project operations.
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies oilfield products and provides services for drilling, completion and well intervention operations. Activities include equipment rental, coring services, product manufacturing, procurement,…
Sells to B2B customers in the energy sector, particularly drilling, completion and well intervention teams at oil, gas and geothermal operators and contractors, across onshore and offshore operations.
Financial Health
HealthyHealthy · Hiring · 68% CAGR over 4y
Location
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsProvides marine, subsea and maintenance services to the oil and gas industry, including offshore unit and support vessel management, tanker pilotage and mooring, ROV inspection, subsea construction…
Serves B2B customers in the oil and gas industry, particularly offshore operators and contractors needing marine, subsea, maintenance and project support in continental and deep offshore environments.
Financial Health
DistressedDistressed
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides subsea services for offshore energy infrastructure, including marine survey, unexploded ordnance identification and disposal, inspection, repair and maintenance, subsea construction, and…
Serves B2B clients in international oil and gas, offshore renewables and subsea infrastructure, including asset owners, operators and cable stakeholders needing marine project support.
Financial Health
StableStable · 0% CAGR over 4y
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides subsea project management and seabed clearance services for offshore projects, including desktop studies, surveys, target investigation and disposal, ALARP certification, and removal of…
Sells to businesses running commercial subsea and offshore projects, particularly offshore energy, decommissioning and marine infrastructure operators responsible for seabed clearance and project…
Financial Health
StrongStrong · Hiring · 63% CAGR over 5y
Location
Provides subsea inspection, maintenance and repair services, non‑destructive testing, remotely operated vehicles, and engineered equipment for offshore oil and gas operations, along with robotics,…
Serves B2B and public-sector customers in oil and gas, renewable energy, aerospace, defense, manufacturing, logistics, autonomous transit, and science and research sectors.
Location
ORCA OCEANIC SYSTEMS LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides engineering, technical consulting and operational support for commercial diving operations, including dive system design, equipment brokerage, IMCA-compliant audits, maintenance programmes…
Serves B2B clients in the global commercial diving and offshore industries, including diving contractors, vessel operators, and energy/marine organisations needing safety, compliance, and operational…
Financial Health
HealthyHealthy
Location
NEXT GEOSOLUTIONS UKCS LIMITED
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsProvides marine geoscience and offshore survey services, including geophysical, geotechnical, environmental and UXO surveys, oceanography, and desktop studies supporting the planning, design,…
Serves B2B and public-sector organisations developing or operating offshore energy and infrastructure assets, including offshore wind farms, interconnectors, oil and gas projects, and defence…
Financial Health
StableStable · -63% CAGR over 4y
Location
Provides asset integrity and maintenance services for industrial infrastructure, including composite pipe and structural repairs, weldless pipe connectors, composite repair inspection, chemical…
Serves asset owners and operators in oil and gas, power, process industries, renewables, marine and defence, including teams managing pipelines, plants, offshore assets and decommissioning projects.
Location
Provides engineered products and technical services including remotely operated vehicles, subsea equipment, inspection and asset integrity services, autonomous mobile robots, and aerospace…
Serves B2B and government buyers in oil and gas, renewable energy, material handling and logistics, autonomous transit, aerospace, defense, and science/research sectors.
Location
Ashtead Technology
Provides subsea equipment rental and technology services for offshore energy projects, including survey and robotics systems, ROV sensors and tooling, mechanical subsea tools, and inspection and…
Serves B2B customers in the global offshore energy sector, including offshore renewables developers, oil and gas operators, decommissioning contractors, and infrastructure or industrial project teams.
Location
LONDON CONSULTANTS LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides engineering consultancy and design services for offshore energy and marine infrastructure, including floating platforms, mooring and anchoring systems, hull and component design, and support…
Serves global B2B clients in offshore energy and marine infrastructure, including renewable and floating wind developers, upstream and midstream oil and gas operators, aquaculture projects, and…
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
Denholm Energy
Provides engineering and industrial services to the energy and marine sectors, including asset maintenance, decontamination, electrical and instrumentation work, fabrication, energy logistics,…
Serves B2B industrial clients in the energy and marine sectors, including oil and gas, defence, petrochemical, renewables, utilities and distillery operators across the UK, USA, Caspian and Middle…
Location
GUIDED ULTRASONICS LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsDevelops and supplies guided wave ultrasonic testing technology for pipeline inspection and monitoring. Provides inspection systems, permanently installed monitoring hardware, analysis software,…
Serves B2B asset integrity, maintenance and inspection teams at pipeline operators, refineries, offshore facilities and midstream energy companies, as well as specialist NDT service providers and…
Financial Health
WeakWeak · 0% CAGR over 3y
Location
OILFIELD PRODUCTION CONSULTANTS (OPC) LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides technical consultancy and specialist staffing for upstream energy projects, including geoscience, subsurface and reservoir engineering, wells and facilities. Delivers studies, project…
Serves B2B clients in upstream energy, including oil and gas operators, E&P companies, CCS developers and underground gas storage project owners working on global energy and storage projects.
Financial Health
StableStable · 0% CAGR over 2y
Location
Altrad International Ltd
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides industrial maintenance and engineering services including inspection, access scaffolding, insulation, surface treatment, mechanical works and project management for energy and process…
Serves B2B industrial asset owners and operators in oil and gas, LNG, nuclear, power generation, process industries, naval, construction and renewable energy, plus building industry buyers and…
Financial Health
WeakWeak · 0% CAGR over 4y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsOwns and operates vessels providing subsea services, ship management, and offshore engineering and construction support for the oil and gas industry. Also undertakes maritime repair and fabrication…
Serves B2B customers in the global oil and gas and maritime sectors, particularly major offshore operators, vessel owners and companies requiring marine, subsea, bunkering or facility-support…
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
INOSYS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides geophysical, geotechnical and foundation engineering consultancy for marine and offshore energy developments, including seabed data analysis, geohazard assessment, site survey and site…
Sells to businesses planning or managing marine and offshore energy developments, including organisations responsible for seabed infrastructure, platform and rig surveys, and carbon capture,…
Financial Health
StrongStrong · Growing, Hiring · 27% CAGR over 4y
Location
Fes Solutions Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, manufactures and supplies fluid transfer and handling equipment for offshore oil, gas and renewable energy sectors, including subsea connectors, swivels, valves, manifolds, hose reel…
Serves B2B customers in the offshore oil and gas and offshore renewable energy sectors, including organisations involved in subsea, marine, pipeline, production and cargo offloading operations.
Financial Health
WeakWeak · 0% CAGR over 2y
Location
INSPECTION AND CONSULTANCY SERVICES LIMITED
Trajectory
2y · 2021–NowFinancial sub-scores
Computed from 2 filingsProvides inspection, non-destructive testing (NDT), and technical consultancy services for oil, gas, petrochemical and energy projects, including vendor inspection, quality assurance and control…
Serves major utilities, construction companies, and operators or contractors in the oil, gas, petrochemical and renewable energy sectors, including organisations needing project and asset inspection…
Financial Health
StableStable · Hiring · 11% CAGR over 1y
Location
Hunting
Designs and manufactures equipment and components for the energy industry, including perforating and logging systems, OCTG connection technologies, subsea and well intervention equipment, well…
Serves B2B customers in the global energy sector, including oil and gas, geothermal and offshore operators, plus aerospace, defence, medical, telecommunications, utilities, commercial and…
Location
FES International
Designs and manufactures fluid transfer and subsea equipment for offshore oil, gas and renewable energy sectors, including hose reel systems, breakaway couplings, valves, connectors, pig launchers,…
Serves B2B customers in the offshore industry, particularly oil and gas operators, offshore renewable energy companies, marine contractors and subsea engineering/project teams.
Location
INFINITY A LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides owner’s project management and engineering consultancy for energy projects, including oil, gas, hydrogen and carbon capture. Supports project evaluation, design and execution, technical…
Serves B2B energy asset owners and operators in oil, gas, hydrogen and carbon capture, including major upstream operators and project partners managing complex energy projects and assets.
Financial Health
StableStable
Location
Hunting
Designs and manufactures equipment and components for the energy industry, including perforating and logging systems, OCTG connection technologies, subsea and well intervention equipment, tubular…
Serves B2B customers in global energy markets, including oil and gas, geothermal, offshore and subsea operators, as well as aerospace and defence, medical, telecommunications, utilities, commercial…
Location
Bluewater Professional Services Ltd
Trajectory
5y · 2022–NowFinancial sub-scores
Computed from 5 filingsDesigns, develops, leases and operates offshore tanker-based production and storage systems for the oil and gas sector, including FPSOs and mooring systems. Provides single point mooring, loading and…
Serves energy companies and offshore project operators in oil and gas, LNG, and renewable energy markets, including customers needing floating production, storage, mooring, and offshore transfer…
Financial Health
StableStable
Location
Hunting
Designs and manufactures equipment and components for the energy industry, including perforating and logging systems, OCTG connection technology, subsea equipment, well intervention and testing…
Serves B2B customers in the global energy sector, including oil and gas, geothermal, offshore and subsea operators, plus aerospace, defence, medical, telecommunications, utilities, commercial and…
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides subsea operations consultancy and technical support for offshore projects, including diving and remotely operated vehicle (ROV) operations, vessel and dive system assurance audits, project…
Serves global B2B clients in offshore energy, marine and subsea sectors, including diving and ROV contractors, vessel operators, supply chains and project coordinators.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
Oceaneering
Provides engineered products and technical services including remotely operated vehicles, subsea connection and distribution systems, inspection and maintenance solutions, positioning and data…
Serves businesses and government/public-sector bodies in oil and gas, renewable energy, material handling and logistics, autonomous transit, aerospace, defence, and science and research.
Location
Heerema
Provides offshore marine contracting services for the energy industry, including transportation, installation and removal of offshore structures such as oil and gas platforms and wind farm…
Serves B2B clients in the offshore energy sector, including offshore wind developers, transmission operators and oil and gas companies with large-scale offshore infrastructure projects.
Location
ASP Shareholdings Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides rope access inspection, maintenance and repair services for renewable energy, oil and gas, and industrial assets. Services include non-destructive testing (NDT), structural inspections,…
Serves businesses operating renewable energy, oil and gas, and asset integrity operations, including owners and operators of onshore and offshore assets requiring inspection, maintenance, repair, and…
Financial Health
WeakWeak · -42% CAGR over 4y
Location
Excellence Logging
Provides oilfield services including surface data logging, real-time drilling data acquisition and monitoring, formation evaluation, well intervention, downhole reservoir logging, and geological and…
Serves upstream oil and gas operators, drilling teams and energy companies managing wells through exploration, drilling, production and intervention phases.
Location
KENT GROUP LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides engineering and technical services for energy infrastructure, including consulting, design, project delivery, commissioning and maintenance of oil, gas and energy transition assets,…
Serves global energy asset owners and operators, including oil and gas, renewables and energy transition project developers, plus data centre clients on major industrial and infrastructure projects.
Financial Health
HealthyHealthy · Hiring · 100% CAGR over 2y
Location
SLB
Provides oilfield technology and services for the energy industry, including reservoir characterization, seismic data processing, drilling and well construction equipment and services, production…
Serves B2B energy companies, oil and gas operators, geothermal and CCUS developers, and industrial firms managing emissions, with buyers in upstream operations, reservoir, drilling, production, and…
Location
RPG QAQC LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides quality assurance and quality control services for the oil and gas industry, including vendor audits and inspections, well component QA support, drill string design review, failure…
Serves B2B customers in the oil and gas sector, especially operators, well engineering teams and suppliers/vendors involved in drilling, completions, production, reservoir and well integrity projects…
Financial Health
HealthyHealthy · Hiring · 6% CAGR over 4y
Location
Delta Energy Services
Provides third-party vendor inspection, quality surveillance and expediting services for energy and engineering projects. Also supplies technical manpower recruitment, ATEX inspection and auditing…
Serves B2B customers in energy and engineering, including oil and gas, subsea, nuclear, utilities, renewables and petrochemical companies, with emphasis on large infrastructure, pipeline and LNG…
Financial Health
Insufficient historyInsufficient history
Location
PPI QUALITY & ENGINEERING UK LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides quality assurance and quality control services for the energy sector, including third‑party equipment inspections at vendor facilities, process and compliance auditing, engineering and…
Serves B2B energy sector customers, including oil and gas operators, LNG and carbon capture project owners, and companies managing critical equipment, assets, vendors and supply chains.
Financial Health
WeakWeak · 0% CAGR over 1y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsOwns and operates offshore support vessels providing marine services to offshore energy exploration and production. Fleet includes platform supply vessels, anchor handling tug supply vessels,…
Serves B2B customers in the global offshore energy industry, including exploration and production operators working in remote and deepwater locations.
Financial Health
StableStable · 0% CAGR over 2y
Location
Forum Energy Technologies
Designs and manufactures equipment and components for oil, gas and energy operations, including drilling and pipe‑handling systems, subsea remotely operated vehicles, valves, fluid handling and…
Serves B2B customers in oil, natural gas and renewable energy, including upstream, midstream and downstream operators, drilling contractors, subsea/offshore teams and energy service companies.
Location
FULKRUM TECHNICAL RESOURCES LTD AND ITS GROUP UNDERTAKINGS
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides inspection, expediting, auditing and technical staffing services for oil, gas and energy projects. Supports asset integrity management and supply chain oversight, delivering quality…
Serves B2B clients in oil and gas and renewables, including energy operators, project owners and contractors managing complex projects and supply chains across multiple countries.
Financial Health
HealthyHealthy · -66% CAGR over 4y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides oilfield engineering services including repair, refurbishment and rental of drilling and oilfield equipment for oil and gas industry clients such as OEMs, drilling contractors, rig owners,…
Serves B2B customers in the oil and gas sector, including original equipment manufacturers, drilling contractors, rig owners, oil companies and oilfield service companies.
Financial Health
StableStable · 0% CAGR over 2y
Location
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How London oilfield services companies work and how to sell to them
What they do
Oilfield services firms usually earn revenue by selling specialist labour, engineering judgement, equipment-backed services and assurance work into upstream and offshore projects. Pricing is typically built around day rates, fixed-price work packages, reimbursable project costs, framework rates or call-off schedules, with variation orders carrying much of the commercial risk. Some firms also rent or maintain tools and inspection equipment, but the core offer is usually services rather than recurring software. Gross margin tends to depend on utilisation, mobilisation planning, certification, insurance cover and the ability to document safe delivery in high-consequence environments.
Who they sell to
Most sell to upstream operators, offshore asset owners, engineering contractors and supply-chain leads inside larger project teams. Technical authority, wells, subsea, pipeline, integrity, decommissioning, HSE and procurement roles all tend to influence buying, with finance involved once liability, payment terms and framework commitments are agreed. Short urgent jobs may be bought through direct award or existing supplier relationships, while larger workstreams usually pass through pre-qualification, tendering, approved vendor lists and commercial review. Trust matters because a low-cost supplier can become expensive if mobilisation slips, paperwork is incomplete or offshore work has to be repeated.
What they buy
Most oilfield services firms tend to spend on project controls, asset and equipment tracking, inspection reporting, document management, QHSE systems, training records, workforce scheduling, time capture, finance, insurance, legal and specialist recruitment. Field-heavy teams also buy logistics support, calibration, certification, personal protective equipment, marine and aviation coordination, and systems that make audit trails easier to retrieve during operator reviews. Sellers with software propositions usually need to show fit with project-based margins, multi-site delivery and subcontractor management. Services sellers often get further when they understand tender deadlines, mobilisation gates and the cost of idle certified staff.
Why and how to sell to them
Oilfield services buyers tend to evaluate vendors when a framework is being renewed, a decommissioning or integrity workstream is starting, a senior operations or commercial hire joins, or a firm is trying to win larger operator and contractor work. Common pain points include uncertain project timing, tight cash conversion, safety documentation, insurance exposure, certification upkeep and pressure to evidence emissions-related controls. Outbound messages work better when they attach to a specific operating trigger: reducing tender admin, shortening mobilisation, improving audit readiness, protecting utilisation or helping a specialist team look credible to larger procurement functions.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
Sources
- Economy & People Report 2024
- Capital investment in offshore energy could rise by over 50%, from £13 billion last year to more than £20 billion by the early 2030s.
- Offshore energy sector employment is estimated to increase by nearly 50% to 225,000 jobs by 2030.
- The offshore energy sector currently supports over 150,000 jobs directly or indirectly.
- Almost 80% of current offshore energy sector jobs are in oil and gas.
- The oil and gas industry contributes approximately £25 billion to the UK economy and has paid £450 billion in production taxes over the past 50 years.
- Reserves and Resources as at end 2024
- Proven and probable UK oil and gas reserves were estimated at 2.9billion boe at the end of 2024.
- UK contingent resources stood at 6.2 billion boe at the end of 2024.
- UK prospective resources were estimated at 4.6 billion boe at the end of 2024.
- Prospective resources were up by 31% from the end of 2023.
- A total of 47.7 billion boe of oil and gas had been produced from the UKCS by the end of 2024.
- Record-high gas production in 2024
- Norway sold 124 billion standard cubic metres (Sm3) of gas in 2024.
- Norway sold 122.8 billion Sm3 of gas in 2022, for comparison with 2024's 124 billion Sm3.
- Overall Norwegian continental shelf production reached about 240 million standard cubic metres of oil equivalent in 2024.
- The 2024 production total was stated as 1510 million barrels of oil equivalent.
- Norway's 2024 overall production was the highest level since 2009.
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