Company lists · Data refreshed September 2026

Top 25 Geothermal well drilling services based in the United Kingdom

Name: Geothermal well drilling services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 90 companies tracked

RevenueBase identified 90 geothermal well drilling services headquartered in the United Kingdom as of September 2026 and tracks 903 professional contacts across them, including 336 with verified work emails. London is the largest hub.

This list covers geothermal well drilling services headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

90Companies

903Contacts tracked

336Verified emails

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The 25 largest geothermal well drilling services based in the United Kingdom

Ranked by team size

Top 25 of 90 geothermal well drilling services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to geothermal well drilling services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Well-Safe Solutions	Partial evidence	Aberdeen, United KingdomHQ checked Sep 20, 2026	201-500	286 contacts →
	Partial evidence “Well-Safe Solutions supports each stage of the well life cycle, from cradle to grave, as part of the global energy transition.” Source: RevenueBase Database · checked Sep 20, 2026
2	Star Energy Group PLC	Indirect evidence	Sudbrooke, United KingdomHQ checked Sep 20, 2026	51-200	83 contacts →
	Indirect evidence “Star Energy Group plc is a British energy business.” Source: RevenueBase Database · checked Sep 20, 2026
3	ADP Group LTD	Partial evidence	Wotton-under-edge, United KingdomHQ checked Sep 20, 2026	11-50	52 contacts →
	Partial evidence “ADP Group are an independent contractor specialising in the supply of drilling and associated services across the UK.” Source: RevenueBase Database · checked Sep 20, 2026
4	MGS LTD	Strong evidence	Bury St Edmunds, United KingdomHQ checked Sep 20, 2026	51-200	30 contacts →
	Strong evidence “MGS manufactures and supplies specialist quality products for use in ground investigation, water well, and geothermal drilling applications, as well as a variety of railway…” Source: RevenueBase Database · checked Sep 20, 2026
5	Dando Drilling International	Strong evidence	Arundel, United KingdomHQ checked Sep 20, 2026	51-200	29 contacts →
	Strong evidence “Dando Drilling International has over 150 years experience of supplying drilling rigs and equipment for the water well, mineral exploration, geotechnical & geothermal sectors.” Source: RevenueBase Database · checked Sep 20, 2026
6	Geothermal Development Company	Partial evidence	Great Yarmouth, United KingdomHQ checked Sep 20, 2026	11-50	28 contacts →
	Partial evidence “CeraPhi Energy is a leading project development company delivering global geothermal energy solutions at scale.” Source: RevenueBase Database · checked Sep 20, 2026
7	Igne Ground Investigation England & Wales	Indirect evidence	Ross-on-wye, United KingdomHQ checked Sep 20, 2026	201-500	24 contacts →
	Indirect evidence “Igne is a UK-wide specialist in pre-construction services, delivering integrated solutions across ground investigation, surveys, UXO risk mitigation, geo-environmental services…” Source: RevenueBase Database · checked Sep 20, 2026
8	Drilcorp	Partial evidence	Seaham, United KingdomHQ checked Sep 20, 2026	11-50	21 contacts →
	Partial evidence “Drilcorp was established in 1992 and since then has developed into one of the UK’s top drilling companies.” Source: RevenueBase Database · checked Sep 20, 2026
9	Hydrovolve	Partial evidence	Dyce, United KingdomHQ checked Sep 20, 2026	11-50	18 contacts →
	Partial evidence “HydroVolve offers an integrated range of pioneering technology products and services across the well lifecycle – all designed, engineered and manufactured inhouse by our dedicated…” Source: RevenueBase Database · checked Sep 20, 2026
10	Stuart Wells	Partial evidence	Shropham, United KingdomHQ checked Sep 20, 2026	11-50	18 contacts →
	Partial evidence “Stuart Wells boasts over 30 years’ experience in construction dewatering and well services.” Source: RevenueBase Database · checked Sep 20, 2026
11	Marshall Drilling LTD	Partial evidence	Westbury, United KingdomHQ checked Sep 20, 2026	11-50	17 contacts →
	Partial evidence “Marshall Drilling offer a nationwide service providing a range of drilling services, specialising in geotechnical and geo-environmental rotary drilling.” Source: RevenueBase Database · checked Sep 20, 2026
12	Nicholls Boreholes & Ground Source	Partial evidence	Kirdford, United KingdomHQ checked Sep 20, 2026	51-200	14 contacts →
	Partial evidence “Nicholls Boreholes & Ground Source is an established, industry leading, family-run, specialist drilling company.” Source: RevenueBase Database · checked Sep 20, 2026
13	Townrock Energy	Partial evidence	Edinburgh City, United KingdomHQ checked Sep 20, 2026	11-50	14 contacts →
	Partial evidence “We are an award-winning geothermal company based in Edinburgh, Scotland and a leading specialist in all aspects of the UK’s geothermal resources.” Source: RevenueBase Database · checked Sep 20, 2026
14	Synergy Boreholes LTD	Partial evidence	Aylesbury, United KingdomHQ checked Sep 20, 2026	11-50	14 contacts →
	Partial evidence “We specialise in Geothermal Ground Source Boreholes and Water Boreholes up to 300m.” Source: RevenueBase Database · checked Sep 20, 2026
15	Groundsource Drilling & Contracting LTD	Partial evidence	Kirkby-in-ashfield, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “Groundsource Drilling & Contracting Limited is a specialised drilling contractor providing a quality, professional, and reliable drilling service to the public, private and…” Source: RevenueBase Database · checked Sep 20, 2026
16	AD Morgan	Indirect evidence	Kinsham, United KingdomHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
17	Ants Group LTD	Partial evidence	Kempston, United KingdomHQ checked Sep 20, 2026	11-50	8 contacts →
	Partial evidence “ANTS Group are a leading supplier of Renewables, Civils, Drilling and Environmental services.” Source: RevenueBase Database · checked Sep 20, 2026
18	Aquasource SW LTD	Indirect evidence	St Austell, United KingdomHQ checked Sep 20, 2026	11-50	5 contacts →
	Indirect evidence “Aquasource (SW) Ltd are a family run Borehole, Renewables, and Construction business based at St Stephen in Mid-Cornwall.” Source: RevenueBase Database · checked Sep 20, 2026
19	Terra Firma Ground Investigation LTD	Partial evidence	Ley Hill, United KingdomHQ checked Sep 20, 2026	11-50	5 contacts →
	Partial evidence “Ground Investigation, Geotechnical Design Advice, Geothermal Energy, Water Abstraction, Expert Opinion, Knowledge and Training – TFGI provide the essential Ground Engineering…” Source: RevenueBase Database · checked Sep 20, 2026
20	Onsen Energy	Partial evidence	Bordon, United KingdomHQ checked Sep 20, 2026	11-50	4 contacts →
	Partial evidence “At Onsen Energy, we provide homeowners, developers, sports clubs, schools and the wider energy market with ground source heating systems and drilling services.” Source: RevenueBase Database · checked Sep 20, 2026
21	Primeval Energy LTD	Partial evidence	Cambridge, United KingdomHQ checked Sep 20, 2026	1-10	4 contacts →
	Partial evidence “Primeval Energy is a geothermal solutions company, newly established by seasoned oil and gas, geothermal, finance and commercial professionals.” Source: RevenueBase Database · checked Sep 20, 2026
22	Consortium Drilling LTD	Partial evidence	Sheffield, United KingdomHQ checked Sep 20, 2026	51-200	4 contacts →
	Partial evidence “Consortium Drilling is a leading onshore deep drilling contractor based in the heart of the UK.” Source: RevenueBase Database · checked Sep 20, 2026
23	Whatley & CO Pewsey LTD	Indirect evidence	Pewsey, United KingdomHQ checked Sep 20, 2026	11-50	4 contacts →
	Indirect evidence “First established in 1870, Whatley & Co are a leading provider of and one of the oldest names in water engineering services within southern England.” Source: RevenueBase Database · checked Sep 20, 2026
24	Drift Services Group	Partial evidence	Hereford, United KingdomHQ checked Sep 20, 2026	1-10	3 contacts →
	Partial evidence “At Drift, we deliver precision drilling solutions that unlock secure water supplies and sustainable energy for projects across the UK.” Source: RevenueBase Database · checked Sep 20, 2026
25	Aquifer Energy	Indirect evidence	Leicestershire, United KingdomHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Aquifer Energy is a specialist consultant offering a full range of services for Open & Closed loop Ground Source Heating Projects.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: geothermal well drilling services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names geothermal well drilling services.
Partial evidence: Its own public description names part of geothermal well drilling services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geothermal well drilling services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 90 geothermal well drilling services based in the United Kingdom

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Geothermal well drilling services based in the United Kingdom at a glance

As of Sep 20, 2026

37.2%Verified-email coverage

10.0Average contacts per company

11-50Median size (employees)

4.4%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 90 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among geothermal well drilling services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “geothermal well drilling services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names geothermal well drilling services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among geothermal well drilling services, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 336 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names geothermal well drilling services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many geothermal well drilling services are there based in the United Kingdom?

RevenueBase identified 90 geothermal well drilling services headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Well-Safe Solutions, headquartered in United Kingdom, tops this list with the largest team on record.

Which city has the most geothermal well drilling services?

London leads with 4 headquartered companies, followed by Dundee (2) and Durham (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 336 verified decision-maker contacts tracked across these 90 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.