UK oilfield services: the basin shrinks, the service bill doesn't

The 252 UK oilfield-services companies that publish a full profit-and-loss book £37.97bn of combined turnover — and their accounts tell the opposite story to their customers’. Our map of UK oil and gas producers found a basin in managed decline, with three producers shrinking for every one growing. In the service layer beneath them, the ratio inverts: among the £20M+ service companies with a comparable prior year, 49 grew turnover by more than 5% while 21 shrank — better than two growing for every one going backwards. Drilling day rates have recovered, subsea project work is expanding, and the work a dying basin generates on its way out — well intervention, integrity, plug-and-abandonment — is turning up as real demand right across the list. But read the £38bn headline with suspicion: nearly half of it is gas-trading desks and overseas concessions that share a shelf with the service companies without being anything of the kind. Figures are approximate — verify against a company’s own accounts before relying on any single number.

Half the money here isn’t oilfield services

The biggest number on the list is BP Gas Marketing — £7.54bn of turnover and £1.3bn of post-tax profit — and it doesn’t service a single well: it is BP’s gas and LNG trading arm, its revenue falling 45% as gas prices normalised. The same is true down much of the top tier. BP (Abu Dhabi) (£4.53bn turnover, £3.03bn profit) holds BP’s share of the Abu Dhabi onshore concession; two Centrica LNG entities book a combined £2.57bn of LNG portfolio activity, swinging to losses as earlier hedging gains unwound; Fortune Oil (£1.49bn — its own headline figure including joint-venture share; statutory revenue is a fraction of that) is a China-focused oil and gas supply group; Vitol Broking (£841.7M, £269.9M profit) is a London arm of the world’s largest independent commodities trader. Together these trading and concession vehicles carry roughly £17.1bn — 45% of the headline total — and belong in no competitive read of the service market.

Two more caveats before any table. First, the two largest genuine names are global groups that happen to be incorporated in Britain: TechnipFMC (£6.89bn, 21,929 staff worldwide) is the New York-listed subsea-engineering group, and Noble Corporation (£2.49bn, 3,862 staff) is the offshore drilling giant that took a UK registration when it merged with Maersk Drilling — and TechnipFMC’s figure already contains its UK operating company, Technip UK, which also publishes its own £1.0bn accounts. Net all that out and the domestically visible service layer is nearer £11.5bn. Second, most of the big names keep their books in US dollars; the sterling figures here are conversions, so part of every year-on-year move is the exchange rate, not the work.

The giants: the actual service layer

Strip the traders and the top of the market is the North Sea supply chain everyone would recognise — subsea engineers, drilling contractors, tool and equipment groups — almost all of it the UK arm of a global parent, and almost all of it growing.

…and some 240 more, including Ensco Offshore U.K. (£302.2M, a second Valaris entity), FMC Technologies (£258.1M, +48%), Baker Hughes’ UK company (£223.5M and a −£72.8M year, the one big loss at the top) and Expro North Sea (£194.2M, +46%). One resident is not a service company at all: Wood Mackenzie (£299.2M, 896 staff) is an energy research and consultancy house, and we leave it out of every competitive read.

*NOV Downhole Eurasia’s +61% turnover and +82% headcount look like group restructuring — activity consolidating into one entity — as much as trading growth; its sister company National Oilwell Varco UK was flat. **Dixstone UK’s turnover rose from roughly £2M to £368.6M in a year: business moved into the entity, not a company growing 15,000%. ***Technip UK’s PBT includes £59M of dividend income from a subsidiary; operating profit was £68M.

The shape of the market

Away from the giants, this is one of the healthier mid-markets we’ve mapped: the £5–25M band is 79% profitable and the £25–100M band 82%. The graveyard is all at the bottom — 97 companies below £1M of turnover, only 31% profitable, a tail of project vehicles, agencies and near-dormant entities — and the £100M–1bn band softens to 70%, where the loss-makers are mostly big-group UK arms carrying restructuring years rather than struggling independents.

Three ways to make money from the same rig

Rank the mid-market by margin and the table looks bimodal — a cluster at 10–20% and another at 45–85%. That isn’t good and bad management; it’s three different business models that should never share a league table.

People businesses — crews, engineers, inspection teams — earn 10–20% when run well: Altus Intervention, the Aberdeen well-intervention specialist, makes £11.1M on £92.8M (12.0%) with 514 staff; CAN (Offshore) earns 21.1% on rope-access inspection and integrity work with 531 staff; Zenith Oilfield Technology (12.8%) and Oil States Industries UK (10.0%) sit in the same band. This is the real skill tier — margins carried by people, not assets.

Rental and tools businesses earn double that, because the asset does the work: Saltire Energy, the Aberdeen drilling-tool rental house, converts £14.1M of profit from £27.9M of turnover (50.6%) with 56 staff; Swellfix UK (downhole sealing technology) runs at 52%; Downhole Products makes £12.2M on £41.7M (29.3%) with just 16 employees. Above them sit the pure asset owners — single-rig and vessel-leasing entities like Deep Sea Stavanger (UK) (60% margin), Odfjell Rig V (47%) and Subsea Leasing (58%), companies with no staff whose “margin” is a day rate on steel, with the crews and costs booked elsewhere in their groups.

And a third group shouldn’t be here at all: Humber Gathering System (75.2% margin) and CATS North Sea (65.5%) are pipeline and terminal owners earning tariff income — infrastructure economics, not services; Spirit Energy Southern North Sea’s 68.4% is producer economics — its accounts describe a gas producer, pumping from the Cygnus and Clipper South fields, misclassified among the service companies, and its prior year was a £14.2M loss; and BP Kuwait’s 83.6% is a captive of its parent. None of them belongs in a best-run-operator read, whatever the raw screen says.

The decommissioning paradox

The basin’s decline is the service layer’s order book. Every field that stops producing still has to be made safe — wells plugged, platforms lifted, pipelines cleaned — and the accounts show that work arriving. The cleanest example is Petrodec UK, a rig-based well plug-and-abandonment specialist: turnover up 51% to £42.4M, swinging from a £6.0M loss the year before, with headcount growing — a company whose market grows precisely because its customers’ market is shrinking. Its headline 21% profit margin deserves a caveat, though: most of that profit is intra-group staff recharges on a roughly 5% gross trading margin, and 81% of the revenue comes from its Perenco affiliate — captive-contractor economics, not a standalone 21% business. Interwell, whose downhole plugging technology serves the same late-life work, grew 19% with headcount up 16%; well-intervention and integrity names like Altus and CAN grind steadily forward on the same logic — old fields need more looking after, not less.

It is not a gold rush for everyone. Claxton Engineering Services, a decommissioning and drilling-riser specialist, grew 16% and still posted a −£15.2M year, and Large Diameter Drilling lost £19.2M as turnover fell 35% — offshore project work can absorb enormous losses on a bad contract whatever the structural tailwind. The paradox holds all the same: in the producers’ map, decline shows up as shrinking revenue; here it shows up as demand.

Growth, read with care

The scatter leans right — unusual for anything connected to the North Sea — but the biggest numbers are structure, not sales. Floatel UK Contractor’s +16,071% is an accommodation-vessel entity going from near-dormant to a full year’s contract income; Dixstone’s +15,961% is business moving between group companies; Borr Drilling Land Support’s +388% is a group entity scaling up. And with most large names keeping dollar books, a slice of every sterling growth figure is currency.

What’s left is still a genuine upcycle. The drilling contractors’ entities re-priced as day rates recovered — Ensco UK Drilling +74%, Stena Drillmax Ice +90% — and the subsea and well-service names grew with real hiring behind them: Expro North Sea +46% with 952 staff, Weatherford U.K. +49% with staff +13%, Archer (UK) +37%, Rotech Subsea +62% with headcount up 26%. The best single growth story is Dolphin Drilling Offshore: turnover +112% and headcount +147% in its 2024 year — the Dolphin Drilling group’s crewing entity staffing its rig reactivations, 57 crew becoming 141, which is what real reactivation looks like. It comes with an honesty caveat: it sells only within its own group, its accounts carry a material uncertainty over going concern tied to the wider group’s finances, and its newer 2025 accounts show growth cooling to £21.0M (+10%). Murzuq Oil Services (+105% to £44.1M at a 14% margin, staff +29%) is the fastest-growing profitable independent on the list.

Structure: a trading top on an Aberdeen mid-market

Headline concentration is high — the top 5 hold 62.2% of turnover and the top 10 75.3% — but the top 5 is BP’s gas desk, TechnipFMC’s global group, an Abu Dhabi concession, Noble’s global group and an LNG book. The real market structure sits underneath: a tier of global majors’ UK arms (Halliburton, NOV, Baker Hughes, Weatherford, Subsea 7, Valaris’ Ensco companies), then a broad, mostly Scottish-registered mid-market of specialist independents. Of the 252 companies, 200 are corporate-owned and only 35 individual-owned — this is a market of subsidiaries — and about 9% carry Holdings/Bidco/Topco-style names, the fingerprint of buyout structures.

The vintage profile says something the producers’ map couldn’t: this corporate population is still renewing itself. Where only 10 UK oil producers have been incorporated since 2021, 18 service companies have — and the 2010–15 bulge (53 companies) carries the signature of the rig-entity and services boom of the last cycle, with Petrodec, Dolphin Drilling Offshore and Murzuq all incorporated since 2019. Nobody starts a UK oil company any more; people still start companies to serve — and dismantle — the ones that exist.

What the map shows

1. The service layer is growing while its customers shrink. Among £20M+ service companies with a comparable prior year, 49 grew more than 5% and 21 shrank — the inverse of the producers’ three-shrink-for-one-grow.
2. Nearly half the £38bn was never oilfield services. BP’s gas desk, an Abu Dhabi concession, Centrica’s LNG book, Vitol and Fortune Oil carry ~£17.1bn of the headline; the domestically visible service layer is nearer £11.5bn.
3. Decommissioning is the growth paradox made flesh. Petrodec grew 51% to £42.4M plugging the wells the basin is retiring — though its headline 21% margin is mostly intra-group recharges; every field that dies becomes somebody’s revenue.
4. Margin is a business model, not a score. People businesses earn 10–20% (Altus, CAN, Oil States); rental and tools earn 30–50% (Saltire, Swellfix); no-staff rig entities print 45–60% day-rate margins; and the 65–75% “margins” at the top belong to pipelines — and one gas producer — misclassified among the service companies.
5. The genuine signal is hiring-backed growth — Dolphin Drilling Offshore (+112% turnover, +147% crew in its 2024 year), Expro, Weatherford, Rotech — while the +15,000% outliers are group plumbing.
6. The population is still renewing. Eighteen service companies incorporated since 2021, against ten producers — the basin’s endgame is being staffed by new companies, not just old ones.

Methodology and caveats

This covers only the UK oilfield-services companies that publish a full profit-and-loss — 252 of the 441 active companies in the category; the rest file abridged or dormant accounts with no revenue figures, so small crews and consultancies are under-represented. Trading desks, concession holders and pipeline owners share this category with the genuine service companies; we flag and exclude them from competitive reads, but the headline totals include them. Many of the larger companies keep their books in US dollars, so sterling figures and year-on-year moves partly reflect exchange rates; where a global group is UK-incorporated (TechnipFMC, Noble), its figures are worldwide, not UK activity, and can double-count its own UK subsidiaries. Margins are never comparable across people, rental, asset-owning and toll business models; single-entity accounts within larger groups reflect group structure as much as trading. Business descriptions are directional. Figures are approximate — verify against a company’s own accounts before relying on any single number. This is analysis, not financial advice.