Company lists · Data refreshed September 2026

Top 25 Drilling rig installation companies worldwide

Name: Drilling rig installation companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 3,302 companies tracked

RevenueBase identified 3,302 drilling rig installation companies worldwide as of September 2026 and tracks 167,438 professional contacts across them, including 26,732 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers drilling rig installation companies worldwide, 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 19, 2026. Country and city lists for drilling rig installation companies follow the table.

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 19, 2026 86% judged on-target in blind review

3,302Companies

167,438Contacts tracked

26,732Verified emails

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The 25 largest drilling rig installation companies worldwide

Ranked by team size

Top 25 of 3,302 drilling rig installation companies worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to drilling rig installation 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	Transocean	Partial evidence	Zug, SwitzerlandHQ checked Sep 19, 2026	1,001-5,000	10,068 contacts →
	Partial evidence “Transocean is a leading international provider of offshore contract drilling services for oil and gas wells.” Source: RevenueBase Database · checked Sep 19, 2026
2	Nabors Industries	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	10001+	5,865 contacts →
	Indirect evidence “Nabors Industries is a leading provider of advanced technology for the energy industry.” Source: RevenueBase Database · checked Sep 19, 2026
3	ADES	Partial evidence	Al Khobar, Saudi ArabiaHQ checked Sep 19, 2026	5,001-10,000	3,251 contacts →
	Partial evidence “ADES is a world-leading international provider of oil and gas drilling services.” Source: RevenueBase Database · checked Sep 19, 2026
4	Shelf Drilling	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 19, 2026	1,001-5,000	2,689 contacts →
	Partial evidence “Shelf Drilling is a wholly owned subsidiary of ADES Holding Company, a leading international oil and gas drilling services provider.” Source: RevenueBase Database · checked Sep 19, 2026
5	Ensco PLC	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	5,001-10,000	2,679 contacts →
	Indirect evidence “We Are Valaris With decades of expertise and strategic commitment built on efficiency, capability and ingenuity, our sights are continually set toward a future built with purpose…” Source: RevenueBase Database · checked Sep 19, 2026
6	Precision Drilling	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	5,001-10,000	2,471 contacts →
	Indirect evidence “Precision is a leading provider of safe and High Performance, High-Value services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 19, 2026
7	Estrutural	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 19, 2026	1,001-5,000	2,461 contacts →
	Indirect evidence “Quem somos: Somos uma empresa nacional, com mais de 30 anos no segmento da construção, montagem e manutenção industrial.” Source: RevenueBase Database · checked Sep 19, 2026
8	Archer	Partial evidence	Sandnes, NorwayHQ checked Sep 19, 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 19, 2026
9	Patterson-Uti	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	10001+	2,317 contacts →
	Partial evidence “Patterson-UTI is a leading provider of drilling and completion services to oil and natural gas exploration and production companies in the United States and other select…” Source: RevenueBase Database · checked Sep 19, 2026
10	Ensign Energy Services	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	1,001-5,000	2,176 contacts →
	Indirect evidence “Ensign Energy Services Inc.” Source: RevenueBase Database · checked Sep 19, 2026
11	Egyptian Drilling Company EDC	Partial evidence	Cairo, EgyptHQ checked Sep 19, 2026	5,001-10,000	2,122 contacts →
	Partial evidence “EDC is one of the leading drilling contractors in Egypt and the MENA region; established in 1976 in partnership with Maersk Drilling, EDC is now 100% owned by Egyptian General…” Source: RevenueBase Database · checked Sep 19, 2026
12	SAN Antonio Internacional	Indirect evidence	Comuna 1, ArgentinaHQ checked Sep 19, 2026	1,001-5,000	2,064 contacts →
	Indirect evidence “Somos la mayor prestadora de servicios de perforación de la Argentina y somos líderes en la prestación de servicios asociados al mantenimiento y optimización de los pozos de…” Source: RevenueBase Database · checked Sep 19, 2026
13	Arabian Drilling	Partial evidence	Al-khobar, Saudi ArabiaHQ checked Sep 19, 2026	5,001-10,000	2,042 contacts →
	Partial evidence “We are the region’s trusted onshore and offshore oil & gas drilling company with an extensive track record of operational excellence and advanced capabilities that have enabled…” Source: RevenueBase Database · checked Sep 19, 2026
14	Superior Energy Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,938 contacts →
	Indirect evidence “For oil & gas exploration and production companies worldwide, Superior Energy Services is an oilfield products and services company with global reach, financial stability and…” Source: RevenueBase Database · checked Sep 19, 2026
15	Borr Drilling	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,699 contacts →
	Partial evidence “Borr Drilling Limited is an offshore shallow-water drilling contractor providing worldwide offshore drilling services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 19, 2026
16	Algerian National Drilling Company Enafor	Partial evidence	Ouargla, AlgeriaHQ checked Sep 19, 2026	5,001-10,000	1,407 contacts →
	Partial evidence “National Drilling Company” Source: RevenueBase Database · checked Sep 19, 2026
17	Foresea	Indirect evidence	United StatesHQ checked Sep 19, 2026	1,001-5,000	1,402 contacts →
	Indirect evidence “Somos uma empresa focada em oferecer soluções em Perfuração Offshore, com expertise e excelência em afretamento e operação de sondas para águas ultraprofundas.” Source: RevenueBase Database · checked Sep 19, 2026
18	Gulf Drilling International	Indirect evidence	Doha, QatarHQ checked Sep 19, 2026	1,001-5,000	1,398 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
19	ARO Drilling	Strong evidence	Dammam, Saudi ArabiaHQ checked Sep 19, 2026	1,001-5,000	1,249 contacts →
	Strong evidence “ARO is a world-class offshore drilling contractor that owns, operates, and manages a fleet of high-specification and premium jack-up rigs in Saudi Arabia.” Source: RevenueBase Database · checked Sep 19, 2026
20	Abraj Energy Services	Indirect evidence	Muscat, OmanHQ checked Sep 19, 2026	1,001-5,000	1,244 contacts →
	Indirect evidence “Abraj Energy Services ("Abraj"), was founded in May 2006 and has taken major strides.” Source: RevenueBase Database · checked Sep 19, 2026
21	PT Pertamina Drilling Services Indonesia	Partial evidence	South Jakarta, IndonesiaHQ checked Sep 19, 2026	1,001-5,000	1,200 contacts →
	Partial evidence “PT Pertamina Drilling Services Indonesia (Pertamina Drilling) was established on June 13th, 2008.” Source: RevenueBase Database · checked Sep 19, 2026
22	Stewart & Stevenson	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,135 contacts →
	Indirect evidence “Stewart & Stevenson is a leading designer, manufacturer and provider of specialized equipment and aftermarket parts and service for the oil and gas and other industries that we…” Source: RevenueBase Database · checked Sep 19, 2026
23	Scientific Drilling	Partial evidence	The Woodlands, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,134 contacts →
	Partial evidence “THE ULTIMATE PARTNER IN WELLBORE PLACEMENT Scientific Drilling International is an independent service provider offering a complete high accuracy wellbore placement and drilling…” Source: RevenueBase Database · checked Sep 19, 2026
24	HMH	Partial evidence	Amsterdam, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,097 contacts →
	Partial evidence “HMH is a premier drilling solutions provider - delivering a broad portfolio of products and services that are designed to be the safest and most efficient in the industry.” Source: RevenueBase Database · checked Sep 19, 2026
25	Queiroz Galvão Óleo E GÁS S.A	Indirect evidence	BrazilHQ checked Sep 19, 2026	1,001-5,000	1,069 contacts →
	Indirect evidence “A Queiroz Galvão Óleo e Gás (QGOG) é a maior companhia privada de prestação de serviços de perfuração e produção do Brasil.” Source: RevenueBase Database · checked Sep 19, 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 rig installation 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 drilling rig installation companies.
Partial evidence: Its own public description names part of drilling rig installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name drilling rig installation 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 3,302 drilling rig installation companies worldwide

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Drilling rig installation companies worldwide at a glance

As of Sep 19, 2026

16.0%Verified-email coverage

50.7Average contacts per company

11-50Median size (employees)

4.7%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

852

11-50

1,134

51-200

728

201-500

292

501-1,000

133

1,001-5,000

124

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 rig installation 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.
Coverage: Every country. Country and city lists for drilling rig installation companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “drilling rig installation 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 drilling rig installation 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 drilling rig installation companies, and records with no verified work email.
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, 26,732 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 19, 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.

Drilling rig installation companies by location

20 lists · largest first

Every Drilling rig installation companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 rig installation 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 drilling rig installation companies are there worldwide?

RevenueBase identified 3,302 drilling rig installation companies worldwide 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?

Transocean, headquartered in Zug, tops this list with the largest team on record.

Which country has the most drilling rig installation companies?

The United States leads with 938 companies, followed by Canada (264) and the United Kingdom (127). Every drilling rig installation companies list by country and city is linked on this page.

Which city has the most drilling rig installation companies?

Houston leads with 156 headquartered companies, followed by Calgary (82) and Midland (50).

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 26,732 verified decision-maker contacts tracked across these 3,302 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 19, 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.