Company lists · Data refreshed September 2026

Top 25 Drilling contractors based in Norway

Name: Drilling contractors based in Norway
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 114 companies tracked

RevenueBase identified 114 drilling contractors headquartered in Norway as of September 2026 and tracks 6,617 professional contacts across them, including 2,228 with verified work emails. Stavanger is the largest hub.

This list covers drilling contractors 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

114Companies

6,617Contacts tracked

2,228Verified emails

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The 25 largest drilling contractors based in Norway

Ranked by team size

Top 25 of 114 drilling contractors 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 drilling contractors: 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	Archer	Partial evidence	Sandnes, NorwayHQ checked Sep 16, 2026	5,001-10,000	2,373 contacts →
	Partial evidence “Archer is a company providing drilling and well services to the global energy industry.” Source: RevenueBase Database · checked Sep 16, 2026
2	AGR	Partial evidence	Oslo, NorwayHQ checked Sep 16, 2026	501-1,000	768 contacts →
	Partial 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	Ocean Installer	Indirect evidence	Stavanger, NorwayHQ checked Sep 16, 2026	201-500	299 contacts →
	Indirect evidence “Ocean Installer is a leading marine construction company that specializes in offshore installation services with more than 15 years of experience delivering large and complex…” Source: RevenueBase Database · checked Sep 16, 2026
6	Akofs Offshore	Indirect evidence	Oslo, NorwayHQ checked Sep 16, 2026	201-500	233 contacts →
	Indirect 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	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
8	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
9	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
10	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
11	TCO AS	Indirect evidence	Indre Arna, NorwayHQ checked Sep 16, 2026	51-200	103 contacts →
	Indirect 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
12	Devico AS	Partial evidence	Heimdal, NorwayHQ checked Sep 16, 2026	51-200	63 contacts →
	Partial evidence “Devico has over 35 years of experience with directional core drilling (DCD) and borehole surveying technology.” Source: RevenueBase Database · checked Sep 16, 2026
13	SUB SEA Services AS	Partial evidence	Stavanger, NorwayHQ checked Sep 16, 2026	51-200	52 contacts →
	Partial evidence “Sub Sea Services is a solution-focused, flexible and collaboration oriented partner to the offshore drilling industry.” Source: RevenueBase Database · checked Sep 16, 2026
14	Subseapartner AS	Partial evidence	Haugesund, NorwayHQ checked Sep 16, 2026	11-50	44 contacts →
	Partial evidence “SubseaPartner is a leading diving contractor in the shallow-deep segment.” Source: RevenueBase Database · checked Sep 16, 2026
15	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
16	Oss-Nor AS	Indirect evidence	Kristiansund, NorwayHQ checked Sep 16, 2026	51-200	40 contacts →
	Indirect evidence “offshore equipment maintenance” Source: RevenueBase Database · checked Sep 16, 2026
17	Tomax AS	Partial evidence	Stavanger, NorwayHQ checked Sep 16, 2026	11-50	36 contacts →
	Partial 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
18	Thermotech AS	Indirect evidence	Haugesund, NorwayHQ checked Sep 16, 2026	11-50	32 contacts →
	Indirect evidence “Thermotech provides leading on-site products and services for the energy sector.” Source: RevenueBase Database · checked Sep 16, 2026
19	Sjøentreprenøren AS	Indirect evidence	Bergen, NorwayHQ checked Sep 16, 2026	11-50	22 contacts →
	Indirect evidence “Vi utfører oppdrag innen mudring, sprenging, riving, konstruksjon, inspeksjon og mye mer under vann.” Source: RevenueBase Database · checked Sep 16, 2026
20	Submara Prosjekt AS	Indirect evidence	Tofte, NorwayHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Dykkerteknikk AS ble etablert i 1976 og er et godt etablert selskap innen undervannsarbeid og marine operasjoner.” Source: RevenueBase Database · checked Sep 16, 2026
21	Aarsleff Fundamentering & Boring	Indirect evidence	Ulefoss, NorwayHQ checked Sep 16, 2026	51-200	20 contacts →
	Indirect evidence “Gjennom våre konkurransedyktige tjenester bygger vi tillit og skaper verdier for kunden.” Source: RevenueBase Database · checked Sep 16, 2026
22	Valen Marina AS	Indirect evidence	Kolltveit, NorwayHQ checked Sep 16, 2026	11-50	18 contacts →
	Indirect evidence “Valen Marina AS er en sjøentreprenør som har sitt virke innenfor dykke- og ROV tjenester.” Source: RevenueBase Database · checked Sep 16, 2026
23	Independent OIL Tools AS	Indirect evidence	Stavanger, NorwayHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence “WE ARE KNOWN FOR BETTER SERVICE & FASTER DELIVERY Independent Oil Tools AS started out back in 1992 in Norway.” Source: RevenueBase Database · checked Sep 16, 2026
24	Onsite Treatment Services	Indirect evidence	Tananger, NorwayHQ checked Sep 16, 2026	11-50	14 contacts →
	Indirect evidence “OTS offers a large and modern rental fleet, water treatment, slop treatment, tank cleaning, filtration, cuttings handling, vacuum systems, mud skips, well service pumps, pumping…” Source: RevenueBase Database · checked Sep 16, 2026
25	Innovar Solutions AS	Partial evidence	Sola, NorwayHQ checked Sep 16, 2026	11-50	14 contacts →
	Partial evidence “Innovar Solutions is a small focused group of people with the capability of inventing, designing, manufacturing and applying new smart tools for drilling and completion operations.” 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: drilling contractors. 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 drilling contractors.
Partial evidence: Its own public description names part of drilling contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name drilling contractors. 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 114 drilling contractors based in Norway

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Drilling contractors based in Norway at a glance

As of Sep 16, 2026

33.7%Verified-email coverage

58.0Average contacts per company

11-50Median size (employees)

17.5%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 114 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 drilling contractors, 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 “drilling contractors”. 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 drilling contractors), 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 drilling contractors, 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, 2,228 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 drilling contractors, 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 drilling contractors are there based in Norway?

RevenueBase identified 114 drilling contractors 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?

Archer, headquartered in Sandnes, tops this list with the largest team on record.

Which city has the most drilling contractors?

Stavanger leads with 20 headquartered companies, followed by Kristiansand (7) and Sandnes (7).

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 2,228 verified decision-maker contacts tracked across these 114 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.