Company lists · Data refreshed September 2026

Top 25 Subsea drilling systems companies based in Norway

Name: Subsea drilling systems companies based in Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 99 companies tracked

RevenueBase identified 99 subsea drilling systems companies headquartered in Norway as of September 2026 and tracks 8,002 professional contacts across them, including 2,858 with verified work emails. Stavanger is the largest hub.

This list covers subsea drilling systems companies headquartered in Norway, 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 16, 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 16, 2026 86% judged on-target in blind review

99Companies

8,002Contacts tracked

2,858Verified emails

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The 25 largest subsea drilling systems companies based in Norway

Ranked by team size

Top 25 of 99 subsea drilling systems companies based in Norway, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to subsea drilling systems companies: 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	DOF	Partial evidence	Bergen, NorwayHQ checked Sep 16, 2026	5,001-10,000	2,942 contacts →
	Partial evidence “With a multi-national workforce of over 5,700 personnel, DOF is an international group of companies which owns and operates a fleet of modern offshore/subsea vessels, with an…” Source: RevenueBase Database · checked Sep 16, 2026
2	AGR	Strong evidence	Oslo, NorwayHQ checked Sep 16, 2026	501-1,000	768 contacts →
	Strong evidence “AGR – an Aqualis company – is a multidisciplinary consultancy, specialising in drilling & wells, subsurface, marine and subsea solutions, resourcing, technical safety and software…” Source: RevenueBase Database · checked Sep 16, 2026
3	Cosl Drilling Europe AS	Partial evidence	Sandnes, NorwayHQ checked Sep 16, 2026	501-1,000	629 contacts →
	Partial evidence “Always do better" is our guiding principle leading us through the energy transition and towards our vision of becoming the preferred supplier of drilling services.” Source: RevenueBase Database · checked Sep 16, 2026
4	Mhwirth	Indirect evidence	Kristiansand, NorwayHQ checked Sep 16, 2026	1,001-5,000	560 contacts →
	Indirect evidence “October 2021.” Source: RevenueBase Database · checked Sep 16, 2026
5	Island Offshore	Indirect evidence	Ulsteinvik, NorwayHQ checked Sep 16, 2026	501-1,000	501 contacts →
	Indirect evidence “Island Offshore - The Island Offshore Group is a leading provider of services to the offshore industry ranging from Platform Supply, Walk-to-work and Anchor Handling to Advanced…” Source: RevenueBase Database · checked Sep 16, 2026
6	Akofs Offshore	Partial evidence	Oslo, NorwayHQ checked Sep 16, 2026	201-500	233 contacts →
	Partial evidence “AKOFS Offshore is a global provider of vessel based subsea well construction and intervention services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 16, 2026
7	Imenco	Indirect evidence	Aksdal, NorwayHQ checked Sep 16, 2026	201-500	199 contacts →
	Indirect evidence “Imenco is a group of companies working mainly in five main business areas: Offshore oil & gas, offshore renewables, aquaculture, marine & naval and industrial.” Source: RevenueBase Database · checked Sep 16, 2026
8	Enhanced Drilling	Partial evidence	Straume, NorwayHQ checked Sep 16, 2026	51-200	194 contacts →
	Partial evidence “Innovative, enabling technology is at the very heart of Enhanced Drilling.” Source: RevenueBase Database · checked Sep 16, 2026
9	PSW Technology	Partial evidence	Mongstad, NorwayHQ checked Sep 16, 2026	201-500	133 contacts →
	Partial evidence “PSW Technology offers a wide range of services and solutions to the global drilling industry.” Source: RevenueBase Database · checked Sep 16, 2026
10	Island Drilling Company AS	Partial evidence	Sandsli, NorwayHQ checked Sep 16, 2026	51-200	114 contacts →
	Partial evidence “Island Drilling was established in 2006 by industry veterans and Island Offshore, the leading global player in well intervention, to build and own special purpose semi-submersible…” Source: RevenueBase Database · checked Sep 16, 2026
11	Techouse AS	Indirect evidence	Sandnes, NorwayHQ checked Sep 16, 2026	51-200	106 contacts →
	Indirect evidence “Techouse is a leader in the provision of offshore platform processing equipment and services to the international oil & gas industry.” Source: RevenueBase Database · checked Sep 16, 2026
12	TCO AS	Partial evidence	Indre Arna, NorwayHQ checked Sep 16, 2026	51-200	103 contacts →
	Partial evidence “TCO is a Norwegian founded global oilfield service company, which specialises in the design, manufacture and installation of glass barrier plugs, chemical injection systems and…” Source: RevenueBase Database · checked Sep 16, 2026
13	Optime, A Halliburton Service	Partial evidence	Notodden, NorwayHQ checked Sep 16, 2026	51-200	98 contacts →
	Partial evidence “Optime, A Halliburton Service is an innovative subsea oil and gas provider focusing on cost efficient solutions specifically towards products within the well access, well…” Source: RevenueBase Database · checked Sep 16, 2026
14	Scan Tech	Partial evidence	Stavanger, NorwayHQ checked Sep 16, 2026	51-200	72 contacts →
	Partial evidence “Scan Tech develops, designs and manufactures machinery and equipment for well testing, maintenance and modifications, subsea, lifting and marine products.” Source: RevenueBase Database · checked Sep 16, 2026
15	Technip India Limited	Indirect evidence	Sandvika, NorwayHQ checked Sep 16, 2026	51-200	59 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
16	Agility	Partial evidence	Skien, NorwayHQ checked Sep 16, 2026	51-200	53 contacts →
	Partial evidence “A Trusted Partner in Subsea Technology.” Source: RevenueBase Database · checked Sep 16, 2026
17	Subseadesign AS	Partial evidence	Lierbyen, NorwayHQ checked Sep 16, 2026	51-200	47 contacts →
	Partial evidence “SubseaDesign (SD) is an engineering, design and fabrication company providing equipment and services for the oil and gas industry.” Source: RevenueBase Database · checked Sep 16, 2026
18	Wellconnection Group	Strong evidence	Stavanger, NorwayHQ checked Sep 16, 2026	51-200	46 contacts →
	Strong evidence “WellConnection Group is the leading company within inspection, maintenance and repair services (IMR) for drilling and subsea equipment on the Norwegian Continental Shelf.” Source: RevenueBase Database · checked Sep 16, 2026
19	IOT Group	Indirect evidence	Stavanger, NorwayHQ checked Sep 16, 2026	201-500	43 contacts →
	Indirect evidence “IOT Group is an international service organisation within the oil & gas industry, with worldwide locations in the most important oil & gas logistics hubs.” Source: RevenueBase Database · checked Sep 16, 2026
20	Swire Seabed	Partial evidence	Bergen, NorwayHQ checked Sep 16, 2026	51-200	40 contacts →
	Partial evidence “Swire Seabed provides a highly flexible range of integrated subsea services to the global Oil & Gas and renewables industries.” Source: RevenueBase Database · checked Sep 16, 2026
21	Innova	Indirect evidence	Sandnes, NorwayHQ checked Sep 16, 2026	51-200	38 contacts →
	Indirect evidence “Established in 1997, Innova is a leading supplier of services, equipment and solutions to the international underwater industry.” Source: RevenueBase Database · checked Sep 16, 2026
22	Kystdesign	Partial evidence	Aksdal, NorwayHQ checked Sep 16, 2026	51-200	37 contacts →
	Partial evidence “KYSTDESIGN delivers a wide range of products for the subsea oil- and gas industry, renewables, research and fish farming.” Source: RevenueBase Database · checked Sep 16, 2026
23	Tomax AS	Strong evidence	Stavanger, NorwayHQ checked Sep 16, 2026	11-50	36 contacts →
	Strong evidence “Formed in 2005, Tomax is focused on developing technology for improving drilling efficiency with modern drilling systems.” Source: RevenueBase Database · checked Sep 16, 2026
24	Dwellop Group	Indirect evidence	Stavanger, NorwayHQ checked Sep 16, 2026	51-200	31 contacts →
	Indirect evidence “Dwellop Group is an independent Norwegian company delivering topside handling equipment for Well Intervention, WorkOver and P&A operations.” Source: RevenueBase Database · checked Sep 16, 2026
25	Fluid Control Service AS	Indirect evidence	Sola, NorwayHQ checked Sep 16, 2026	11-50	31 contacts →
	Indirect evidence “Fluid Control Service (FCS) is a leading provider of integrated fluid transfer solutions to the offshore and energy sectors.” Source: RevenueBase Database · checked Sep 16, 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: subsea drilling systems companies. 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 subsea drilling systems companies.
Partial evidence: Its own public description names part of subsea drilling systems companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name subsea drilling systems companies. 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 99 subsea drilling systems companies based in Norway

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Subsea drilling systems companies based in Norway at a glance

As of Sep 16, 2026

35.7%Verified-email coverage

80.8Average contacts per company

11-50Median size (employees)

16.2%Largest-city concentration · Stavanger

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Norway, so it is reported there. Company counts and contact totals on this page are exact for Norway, over 99 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 subsea drilling systems companies, 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 Norway whose own description of what they do matches “subsea drilling systems companies”. 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 subsea drilling systems companies), 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 subsea drilling systems companies, and records with no verified work email. Companies headquartered outside Norway 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, 2,858 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 16, 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 subsea drilling systems companies, 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 subsea drilling systems companies are there based in Norway?

RevenueBase identified 99 subsea drilling systems companies headquartered in Norway 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?

DOF, headquartered in Bergen, tops this list with the largest team on record.

Which city has the most subsea drilling systems companies?

Stavanger leads with 16 headquartered companies, followed by Sandnes (9) and Oslo (8).

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 2,858 verified decision-maker contacts tracked across these 99 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 16, 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.