Company lists · Data refreshed September 2026

Top 25 Deepwater drilling companies based in the United States

Name: Deepwater drilling companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 471 companies tracked

RevenueBase identified 471 deepwater drilling companies headquartered in the United States as of September 2026 and tracks 69,659 professional contacts across them, including 12,888 with verified work emails. Houston is the largest hub.

This list covers deepwater drilling companies headquartered in the United States, 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.

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

471Companies

69,659Contacts tracked

12,888Verified emails

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The 25 largest deepwater drilling companies based in the United States

Ranked by team size

Top 25 of 471 deepwater drilling companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to deepwater drilling 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	EXPRO	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	6,466 contacts →
	Indirect evidence “Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…” 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	Noble Corporation	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	5,601 contacts →
	Partial evidence “Noble is a leading offshore drilling contractor for the oil and gas industry.” Source: RevenueBase Database · checked Sep 19, 2026
4	FMC Technologies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	10001+	4,749 contacts →
	Indirect evidence “FMC Technologies is now TechnipFMC.” Source: RevenueBase Database · checked Sep 19, 2026
5	Valaris Limited	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	3,173 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	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
7	OIL States International	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	2,215 contacts →
	Indirect evidence “Oil States International, Inc.” Source: RevenueBase Database · checked Sep 19, 2026
8	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
9	Helix Energy Solutions Group	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,706 contacts →
	Indirect evidence “Helix Energy Solutions, headquartered in Houston, Texas, is an international offshore energy services company that provides specialty services to the offshore energy industry…” Source: RevenueBase Database · checked Sep 19, 2026
10	Nine Energy Service	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	712 contacts →
	Indirect evidence “With a culture built on high performance and flawless execution, Nine Energy Service is a unique kind of oilfield services company, offering industry-shaping completion solutions…” Source: RevenueBase Database · checked Sep 19, 2026
11	Atwood Oceanics	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	501-1,000	639 contacts →
	Indirect evidence “Atwood Oceanics, Inc.” Source: RevenueBase Database · checked Sep 19, 2026
12	Worldwide Oilfield Machine	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	635 contacts →
	Partial evidence “Worldwide Oilfield Machine (WOM) is a multinational equipment manufacturer specializing in solutions for drilling, testing, production and intervention operations.” Source: RevenueBase Database · checked Sep 19, 2026
13	Dynamic Industries, INC	Indirect evidence	New Orleans, LA, United StatesHQ checked Sep 19, 2026	1,001-5,000	567 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
14	Pacific Drilling	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	501-1,000	538 contacts →
	Partial evidence “On April 15, 2021, Noble Corporation plc completed its acquisition of Pacific Drilling Company LLC.” Source: RevenueBase Database · checked Sep 19, 2026
15	Kosmos Energy	Partial evidence	Dallas, TX, United StatesHQ checked Sep 19, 2026	201-500	444 contacts →
	Partial evidence “Kosmos Energy is a leading deepwater exploration and production company with assets in proven basins offshore Ghana, Equatorial Guinea and the U.S.” Source: RevenueBase Database · checked Sep 19, 2026
16	Cactus Drilling CO	Partial evidence	Oklahoma City, OK, United StatesHQ checked Sep 19, 2026	1,001-5,000	440 contacts →
	Partial evidence “As the largest privately-held domestic land drilling contractor in the United States, Cactus provides competent, motivated personnel utilizing premium equipment to meet and exceed…” Source: RevenueBase Database · checked Sep 19, 2026
17	Thru Tubing Solutions	Indirect evidence	Newcastle, OK, United StatesHQ checked Sep 19, 2026	501-1,000	428 contacts →
	Indirect evidence “Only Thru Tubing Solutions offers the specialized downhole equipment and services to deliver the results you need, right when you need them.” Source: RevenueBase Database · checked Sep 19, 2026
18	Express Energy Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	501-1,000	379 contacts →
	Indirect evidence “Express Energy Services, a leading oilfield services company, is active in every major hydrocarbon basin in the United States and is a premier provider of products and services…” Source: RevenueBase Database · checked Sep 19, 2026
19	AIR Drilling Associates	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	328 contacts →
	Partial evidence “ADA is a global energy services company specializing in advanced drilling solutions for oil, gas, and geothermal applications.” Source: RevenueBase Database · checked Sep 19, 2026
20	Performance Energy Services, LLC	Indirect evidence	Houma, LA, United StatesHQ checked Sep 19, 2026	501-1,000	305 contacts →
	Indirect evidence “Performance Energy Services, a Danos company, was formed in to deliver safe, client-focused support to the onshore and offshore energy markets.” Source: RevenueBase Database · checked Sep 19, 2026
21	Nabors Drilling USA	Partial evidence	Pocola, OK, United StatesHQ checked Sep 19, 2026	201-500	295 contacts →
	Partial evidence “NABORS DRILLING USA is an oil & energy company based out of 1803 N GRAY ST, POCOLA, Oklahoma, United States.” Source: RevenueBase Database · checked Sep 19, 2026
22	Leam Drilling Services	Partial evidence	New Iberia, LA, United StatesHQ checked Sep 19, 2026	501-1,000	291 contacts →
	Partial evidence “LEAM Drilling Systems, Inc.” Source: RevenueBase Database · checked Sep 19, 2026
23	Independence Contract Drilling	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	286 contacts →
	Partial evidence “Corporate Overview Independence Contract Drilling was formed in 2011 as a vertically integrated premium land drilling services provider.” Source: RevenueBase Database · checked Sep 19, 2026
24	Crosby Energy Services	Indirect evidence	Cut Off, LA, United StatesHQ checked Sep 19, 2026	201-500	272 contacts →
	Indirect evidence “Founded as C&D Wireline in 1968, with C&D Production Specialist joining the business in 1993, today Crosby Energy Services is a certified Women’s Business Enterprise National…” Source: RevenueBase Database · checked Sep 19, 2026
25	Offshore Inland Marine & Oilfield Services, INC	Partial evidence	Pensacola, FL, United StatesHQ checked Sep 19, 2026	51-200	266 contacts →
	Partial evidence “Offshore Inland Marine & Oilfield Services, Inc.(OIMO) corporate headquarters in Pensacola,FL provides a full range of Drilling Rig services and construction support activities…” 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: deepwater drilling 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 deepwater drilling companies.
Partial evidence: Its own public description names part of deepwater drilling companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name deepwater drilling 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 471 deepwater drilling companies based in the United States

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Deepwater drilling companies based in the United States at a glance

As of Sep 19, 2026

18.5%Verified-email coverage

147.9Average contacts per company

11-50Median size (employees)

32.9%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

107

11-50

148

51-200

111

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 471 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 deepwater drilling 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 the United States whose own description of what they do matches “deepwater drilling 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 deepwater drilling 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 deepwater drilling companies, and records with no verified work email. Companies headquartered outside United States 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, 12,888 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.

Deepwater drilling companies by metro

Deepwater drilling companies in Houston155

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 deepwater drilling 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 deepwater drilling companies are there based in the United States?

RevenueBase identified 471 deepwater drilling companies headquartered in the United States 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?

EXPRO, headquartered in Houston, tops this list with the largest team on record.

Which city has the most deepwater drilling companies?

Houston leads with 155 headquartered companies, followed by Midland (13) and Broussard (10).

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 12,888 verified decision-maker contacts tracked across these 471 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.