Company lists · Data refreshed September 2026

Top 25 Boring and drilling contractors based in the United States

Name: Boring and drilling contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 783 companies tracked

RevenueBase identified 783 boring and drilling contractors headquartered in the United States as of September 2026 and tracks 14,322 professional contacts across them, including 4,223 with verified work emails. Houston is the largest hub.

This list covers boring and drilling contractors 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 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

783Companies

14,322Contacts tracked

4,223Verified emails

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The 25 largest boring and drilling contractors based in the United States

Ranked by team size

Top 25 of 783 boring and drilling contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to boring and 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	Boart Longyear	Partial evidence	West Valley City, UT, United StatesHQ checked Sep 16, 2026	5,001-10,000	3,285 contacts →
	Partial evidence “Established in 1890, Boart Longyear is the world’s leading innovative provider of drilling services, manufacturer of productivity-driven drilling equipment and performance…” Source: RevenueBase Database · checked Sep 16, 2026
2	Scientific Drilling	Partial evidence	The Woodlands, TX, United StatesHQ checked Sep 16, 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 16, 2026
3	Minova	Indirect evidence	Greenwood Village, CO, United StatesHQ checked Sep 16, 2026	1,001-5,000	449 contacts →
	Indirect evidence “Minova is an industry leader of ground support and geotechnical solutions for mining, tunnelling and surface ground engineering projects.” Source: RevenueBase Database · checked Sep 16, 2026
4	Cactus Drilling CO	Strong evidence	Oklahoma City, OK, United StatesHQ checked Sep 16, 2026	1,001-5,000	440 contacts →
	Strong 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 16, 2026
5	Total Directional Services, LLC	Indirect evidence	Windsor, CO, United StatesHQ checked Sep 16, 2026	51-200	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 16, 2026
6	Leam Drilling Services	Partial evidence	New Iberia, LA, United StatesHQ checked Sep 16, 2026	501-1,000	291 contacts →
	Partial evidence “LEAM Drilling Systems, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
7	Frontier-Kemper Constructors, INC	Indirect evidence	Sylmar, CA, United StatesHQ checked Sep 16, 2026	201-500	273 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
8	Robbins	Indirect evidence	Solon, OH, United StatesHQ checked Sep 16, 2026	501-1,000	264 contacts →
	Indirect evidence “With 70 years of innovation and experience, Robbins is the world’s foremost developer and manufacturer of advanced, underground construction machinery.” Source: RevenueBase Database · checked Sep 16, 2026
9	Cascade Environmental, LLC	Partial evidence	Bothell, WA, United StatesHQ checked Sep 16, 2026	1,001-5,000	248 contacts →
	Partial evidence “CASCADE is the leading provider of environmental and geotechnical drilling, site investigation and environmental remediation.” Source: RevenueBase Database · checked Sep 16, 2026
10	Robert Heely Construction RHC	Partial evidence	Paso Robles, CA, United StatesHQ checked Sep 16, 2026	201-500	232 contacts →
	Partial evidence “RHC is a full-service renewable and industrial construction contractor, serving the San Joaquin Valley, Central Coast and Permian Basin since 1977.” Source: RevenueBase Database · checked Sep 16, 2026
11	Drill Tech Drilling & Shoring, INC	Strong evidence	Antioch, CA, United StatesHQ checked Sep 16, 2026	201-500	217 contacts →
	Strong evidence “Drill Tech Drilling & Shoring, Inc.(DTDS) is a full service Engineering Contractor founded in 1994 Specializing in tunneling, shafts, deep foundation, ground improvement, and…” Source: RevenueBase Database · checked Sep 16, 2026
12	Nomac Drilling	Partial evidence	El Reno, OK, United StatesHQ checked Sep 16, 2026	1,001-5,000	134 contacts →
	Partial evidence “Nomac Drilling is now Patterson-UTI.” Source: RevenueBase Database · checked Sep 16, 2026
13	Geoprobe Systems	Partial evidence	Salina, KS, United StatesHQ checked Sep 16, 2026	51-200	107 contacts →
	Partial evidence “Geoprobe® Manufactures Powerful, Compact Machines & Tooling that Provide Direct Push, Rotary, & Sonic Drilling Capabilities to the Environmental, Geotechnical, Geothermal, &…” Source: RevenueBase Database · checked Sep 16, 2026
14	Bauer Equipment America	Indirect evidence	Conroe, TX, United StatesHQ checked Sep 16, 2026	51-200	92 contacts →
	Indirect evidence “The companies of BAUER AG are today active in a wide variety of fields: industrial engineering, construction, and equipment manufacturing.” Source: RevenueBase Database · checked Sep 16, 2026
15	Equipment Corporation Of America	Partial evidence	Coraopolis, PA, United StatesHQ checked Sep 16, 2026	51-200	87 contacts →
	Partial evidence “Specialized Foundation Construction Machinery * Foundation Drilling Equipment * Pile Driving Equipment * Mobile Piling Rigs * Drilling Accessories * Crane Attachments * Drilling…” Source: RevenueBase Database · checked Sep 16, 2026
16	Redpath USA Corporation	Partial evidence	Sparks, NV, United StatesHQ checked Sep 16, 2026	201-500	87 contacts →
	Partial evidence “Redpath USA Corporation is a full-service underground mining contractor.” Source: RevenueBase Database · checked Sep 16, 2026
17	American Augers	Indirect evidence	West-salem, OH, United StatesHQ checked Sep 16, 2026	201-500	84 contacts →
	Indirect evidence “AmericanAugers and Trencor underground construction equipment are second-to-none.” Source: RevenueBase Database · checked Sep 16, 2026
18	Hole Products	Partial evidence	Little Falls, MN, United StatesHQ checked Sep 16, 2026	51-200	83 contacts →
	Partial evidence “Hole Products is a leading manufacturer and supplier of high performance drilling supplies, tools and equipment to the construction, direct push, environmental, geotechnical…” Source: RevenueBase Database · checked Sep 16, 2026
19	Brierley Associates Corporation	Indirect evidence	Englewood, CO, United StatesHQ checked Sep 16, 2026	51-200	82 contacts →
	Indirect evidence “Creating Space Underground®” has been our mission and our passion for 25 years.” Source: RevenueBase Database · checked Sep 16, 2026
20	Shaft Drillers International	Indirect evidence	Mt Morris, PA, United StatesHQ checked Sep 16, 2026	1,001-5,000	78 contacts →
	Indirect evidence “Shaft Drillers International LLC Headquartered in Mt.” Source: RevenueBase Database · checked Sep 16, 2026
21	Timberline Drilling, INC	Partial evidence	Elko, NV, United StatesHQ checked Sep 16, 2026	201-500	77 contacts →
	Partial evidence “With more than 7.4 million feet drilled in the past seven years, Timberline Drilling has a proven track records in safety and production.” Source: RevenueBase Database · checked Sep 16, 2026
22	B&h Construction, LLC	Indirect evidence	Norman, OK, United StatesHQ checked Sep 16, 2026	501-1,000	76 contacts →
	Indirect evidence “B&H Construction is a family owned underground utility construction company.” Source: RevenueBase Database · checked Sep 16, 2026
23	L. G. Barcus And Sons, INC	Indirect evidence	Kansas City, KS, United StatesHQ checked Sep 16, 2026	51-200	65 contacts →
	Indirect evidence “L.G.” Source: RevenueBase Database · checked Sep 16, 2026
24	Wesco Western Explosives Systems Company	Partial evidence	Salt Lake City, United StatesHQ checked Sep 16, 2026	51-200	61 contacts →
	Partial evidence “WESCO provides rock drilling and blasting solutions to businesses in the construction and mining industries throughout the western United States.” Source: RevenueBase Database · checked Sep 16, 2026
25	BIG DOG Drilling	Strong evidence	Rockwall, TX, United StatesHQ checked Sep 16, 2026	51-200	61 contacts →
	Strong evidence “Big Dog Drilling is commercial pier drilling and concrete contractor located in Rockwall, TX” 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: boring and 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 boring and drilling contractors.
Partial evidence: Its own public description names part of boring and drilling contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name boring and 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 783 boring and drilling contractors based in the United States

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Boring and drilling contractors based in the United States at a glance

As of Sep 16, 2026

29.5%Verified-email coverage

18.3Average contacts per company

11-50Median size (employees)

3.1%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

272

11-50

331

51-200

143

201-500

501-1,000

1,001-5,000

5,001-10,000

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 783 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 boring and 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 the United States whose own description of what they do matches “boring and 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 boring and 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 boring and drilling contractors, 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, 4,223 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 boring and 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 boring and drilling contractors are there based in the United States?

RevenueBase identified 783 boring and drilling contractors 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?

Boart Longyear, headquartered in West Valley City, tops this list with the largest team on record.

Which city has the most boring and drilling contractors?

Houston leads with 24 headquartered companies, followed by Midland (8) and Denver (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 4,223 verified decision-maker contacts tracked across these 783 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.