Company lists · Data refreshed September 2026
Top 25 Underreamer and stabilizer manufacturers worldwide
RevenueBase identified 588 underreamer and stabilizer manufacturers worldwide as of September 2026 and tracks 13,737 professional contacts across them, including 4,470 with verified work emails and 0 with mobile numbers. The United States is the largest market and Houston the largest hub.
This list covers underreamer and stabilizer manufacturers 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 underreamer and stabilizer manufacturers 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.
The 25 largest underreamer and stabilizer manufacturers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,135 contacts → | ||||
Partial 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. | |||||
| 2 | 535 contacts → | ||||
Indirect evidence “Ulterra is a forward-thinking drilling partner whose purpose is to empower people to advance the oil field.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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. | |||||
| 5 | 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. | |||||
| 6 | 291 contacts → | ||||
Indirect evidence “LEAM Drilling Systems, Inc.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 279 contacts → | ||||
Indirect evidence “We deliver reliable, high-performance drilling & completion equipment, expert engineering support & responsive service to customers in 100+ countries.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 270 contacts → | ||||
Indirect evidence “Strength.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 237 contacts → | ||||
Indirect evidence “Setting the Standard in Well Completion, Perforating, Seismic and Well Abandonment Technologies.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 185 contacts → | ||||
Partial evidence “We would like to introduce WELLCARE OIL TOOLS PRIVATE LIMITED, an established manufacturer and supplier of a comprehensive range of Quality Downhole Drilling and Completion…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 183 contacts → | ||||
Indirect evidence “GEODynamics creates and delivers downhole solutions that enable unsurpassed oil and gas well economics, performance, and lifespan.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 178 contacts → | ||||
Indirect evidence “Reservoir Group is a world-class niche oilfield services company that has been addressing customer challenges for more than 70 years.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 172 contacts → | ||||
Partial evidence “Seamless Integration Magnum Technology Center designs and manufactures complete equipment packages for Well Testing, Early Production Facilities, Underbalanced Drilling and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 171 contacts → | ||||
Indirect evidence “Soil displacement hammers (moles), pipe ramming machines, HDD boring systems and machines for the trenchless replacement of supply and drainage pipes.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 166 contacts → | ||||
Indirect evidence “Founded in 2005, Pacesetter Directional Drilling helps the world’s leading explorers and producers achieve their most ambitious directional drilling goals through cutting-edge…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 162 contacts → | ||||
Indirect evidence “From its founding in 1960, Grant Prideco has become the world's technology leader for drill pipe and drill stem accessories.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 151 contacts → | ||||
Partial evidence “As fully independent subsidiary within the KCA Deutag Group, Bentec designs and manufactures high-quality, cost-effective drilling rigs and equipment as well as top drives able to…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 140 contacts → | ||||
Indirect evidence “When it comes to bottomhole assemblies, there's only one rental tool name to know, Stabil Drill.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 139 contacts → | ||||
Indirect evidence “SERVA develops specialized gas and oilfield equipment to offer reliable, safe and efficient products for global energy development.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 138 contacts → | ||||
Indirect evidence “Since 1989 WWT International (WWT) has been developing unique products to help operators reach farther in drilling, completion and intervention worldwide.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 138 contacts → | ||||
Partial evidence “PRD Rigs is one of the leading drilling & exploration rig manufacturers in the world.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 128 contacts → | ||||
Partial evidence “PV Fluid Products is a dynamic, privately owned company that specializes in the design, manufacture, supply and support of progressing cavity power sections used in downhole…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 117 contacts → | ||||
Indirect evidence “Blackhawk Specialty Tools provides oil and gas operators with engineered solutions that improve performance and efficiency.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 115 contacts → | ||||
Indirect evidence “Owen Oil Tools, a division of Core Laboratories, is a global leader in downhole completion, perforating, and well abandonment solutions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 110 contacts → | ||||
Indirect evidence “At Volant, we believe in doing the right things for the right reasons and continuously strive to improve the health, safety and environmental contributions that our products and…” 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: underreamer and stabilizer manufacturers. 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 underreamer and stabilizer manufacturers.
- Partial evidence
- Its own public description names part of underreamer and stabilizer manufacturers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name underreamer and stabilizer manufacturers. 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 588 underreamer and stabilizer manufacturers worldwide
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Underreamer and stabilizer manufacturers worldwide at a glance
As of Sep 19, 2026Companies by employee count
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 underreamer and stabilizer manufacturers, 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
- 7 countries, largest first: the United States, Canada, the United Kingdom, India, Germany, the United Arab Emirates, Australia. Country and city lists for underreamer and stabilizer manufacturers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “underreamer and stabilizer manufacturers”. 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 underreamer and stabilizer manufacturers), 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 underreamer and stabilizer manufacturers, 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, 4,470 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.
Underreamer and stabilizer manufacturers by location
7 lists · largest firstEvery Underreamer and stabilizer manufacturers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Underreamer and stabilizer manufacturers based in the United States310
- Underreamer and stabilizer manufacturers based in Canada87
- Underreamer and stabilizer manufacturers based in the United Kingdom53
- Underreamer and stabilizer manufacturers based in India47
- Underreamer and stabilizer manufacturers based in Germany34
- Underreamer and stabilizer manufacturers based in the United Arab Emirates31
- Underreamer and stabilizer manufacturers based in Australia26
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 underreamer and stabilizer manufacturers, 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 underreamer and stabilizer manufacturers are there worldwide?
RevenueBase identified 588 underreamer and stabilizer manufacturers 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?
Stewart & Stevenson, headquartered in Houston, tops this list with the largest team on record.
Which country has the most underreamer and stabilizer manufacturers?
The United States leads with 310 companies, followed by Canada (87) and the United Kingdom (53). Every underreamer and stabilizer manufacturers list by country and city is linked on this page.
Which city has the most underreamer and stabilizer manufacturers?
Houston leads with 72 headquartered companies, followed by Calgary (36) and Dubai (18).
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 4,470 verified decision-maker contacts tracked across these 588 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.