Company lists · Data refreshed September 2026
Top 25 Downhole tool service providers based in the United States
RevenueBase identified 887 downhole tool service providers headquartered in the United States as of September 2026 and tracks 38,427 professional contacts across them, including 10,047 with verified work emails. Houston is the largest hub.
This list covers downhole tool service providers 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.
The 25 largest downhole tool service providers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,317 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,651 contacts → | ||||
Indirect evidence “Caterpillar Inc.(NYSE:CAT) has completed its acquisition of the Oil & Gas Division (“Weir Oil & Gas”) of the Weir Group PLC, a Scotland-based global engineering business.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,285 contacts → | ||||
Indirect evidence “Cudd offers a broad range of technical and specialized oilfield services to companies engaged in the exploration and production of oil and natural gas worldwide.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,244 contacts → | ||||
Indirect evidence “Newpark Fluids Systems is the world’s leading pure-play oil & gas and geothermal fluid solutions provider.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,134 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 8 | 857 contacts → | ||||
Partial evidence “KLX Energy Services provides more than 100 mission-critical oilfield services, tools, technologies and equipment to some of the industry’s leading operators.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 744 contacts → | ||||
Indirect evidence “Wellbore Integrity Solutions provides superior technologies and global service domain expertise, enabling our customers to enhance the full lifecycle of their wells by solving…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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, 2026Thanks. The Data Team will review it. | |||||
| 11 | 635 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | 608 contacts → | ||||
Indirect evidence “Canrig® is a global supplier of rig technology used to enable safe, efficient and responsible drilling operations.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 501 contacts → | ||||
Indirect evidence “Ranger is one of the largest providers of high specification mobile rig well services, cased hole wireline services, and ancillary services in the U.S.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 432 contacts → | ||||
Indirect evidence “Summit ESP is a service of Halliburton that provides integrated Electric Submersible Pumping systems to enhance daily well production and total reservoir recovery.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 428 contacts → | ||||
Partial 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, 2026Thanks. The Data Team will review it. | |||||
| 16 | 424 contacts → | ||||
Partial evidence “Founded in 1947, Varel Energy Solutions is one of the world’s largest independent manufacturers and suppliers of downhole drilling and completions products to the energy sector.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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, 2026Thanks. The Data Team will review it. | |||||
| 18 | 328 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 19 | 325 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 313 contacts → | ||||
Indirect evidence “Total Directional Services, LLC is a privately owned, managed and operated service company headquartered in Windsor, CO.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 301 contacts → | ||||
Indirect evidence “Since our founding in 2006, NCS Multistage has grown to be a leading provider of engineered products and support services for oil and natural gas wells around the world.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 291 contacts → | ||||
Indirect evidence “LEAM Drilling Systems, Inc.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 286 contacts → | ||||
Partial evidence “NOV™ IntelliServ® provides the oil and gas industry with broadband networked drillstrings and along-string evaluation that enables downhole conditions to be measured, evaluated…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 285 contacts → | ||||
Indirect evidence “Greene’s Energy Group offers a range of support services and products to the oil and gas industry.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 284 contacts → | ||||
Indirect evidence “Since 2003, Premium Oilfield Technologies has been supplying high quality products to the oil and gas industry.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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: downhole tool service providers. 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 downhole tool service providers.
- Partial evidence
- Its own public description names part of downhole tool service providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name downhole tool service providers. 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 887 downhole tool service providers based in the United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 10,047 reachable decision-makers.
Free signup · no credit card
Downhole tool service providers based in the United States at a glance
As of Sep 19, 2026Companies by employee count
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 887 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 downhole tool service providers, 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 “downhole tool service providers”. 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 downhole tool service providers), 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 downhole tool service providers, 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, 10,047 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.
Downhole tool service providers by metro
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 downhole tool service providers, 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 downhole tool service providers are there based in the United States?
RevenueBase identified 887 downhole tool service providers 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?
Patterson-Uti, headquartered in Houston, tops this list with the largest team on record.
Which city has the most downhole tool service providers?
Houston leads with 180 headquartered companies, followed by Midland (66) and Odessa (35).
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 10,047 verified decision-maker contacts tracked across these 887 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.
Ready to reach these companies? Verified emails and direct dials for all 887 downhole tool service providers based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Downhole tool service providers by geography
- Downhole tool service providers based in Conroe, United States
- Downhole tool service providers based in Houston, United States
- Downhole tool service providers based in Midland, United States
- Downhole tool service providers based in Odessa, United States
- Downhole tool service providers based in Oklahoma City, United States
- Downhole tool service providers based in Argentina
- Downhole tool service providers based in Australia
- Downhole tool service providers based in Brazil
- Downhole tool service providers based in Canada
- Downhole tool service providers based in Colombia
- Downhole tool service providers based in Germany
- Downhole tool service providers based in India
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Downhole tool service providers based in Conroe, United States
- Downhole tool service providers based in Houston, United States
- Downhole tool service providers based in Midland, United States
- Downhole tool service providers based in Odessa, United States
- Downhole tool service providers based in Oklahoma City, United States
- Downhole tool service providers based in Argentina