Company lists · Data refreshed October 2026

Top 25 Oil and gas well completion services based in the United States

RevenueBase identified 689 company matches for oil and gas well completion services associated with the United States as of October 2026 and tracks 108,181 professional contacts across them, including 29,326 with verified work emails. Houston is the largest hub.

This list covers company matches for oil and gas well completion services associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 22, 2026 How this list was built
689Companies
108,181Contacts tracked
29,326Verified emails
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The 25 largest oil and gas well completion services based in the United States

Ranked by team size
Top 25 of 689 company matches for oil and gas well completion services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 22, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHouston, TX, United StatesHQ recorded Oct 22, 202610001+56,783 contacts →

Exact match

“We collaborate and engineer solutions to maximize asset value for our customers.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
2Exact matchHouston, United StatesHQ recorded Oct 22, 20265,001-10,0003,884 contacts →

Exact match

“National Energy Services Reunited Corp.(NESR) was founded in 2017 as one of the largest national oilfield services providers in the MENA and Asia Pacific regions and was the first…”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Oct 22, 20261,001-5,0002,923 contacts →

Exact match

“Headquartered in Houston, Texas, Key Energy Services provides a wide array of leading edge energy production solutions and services.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
4Exact matchHouston, TX, United StatesHQ recorded Oct 22, 202610001+2,444 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
5Exact matchHouston, TX, United StatesHQ recorded Oct 22, 20261,001-5,0002,076 contacts →

Exact match

“For oil & gas exploration and production companies worldwide, Superior Energy Services is an oilfield products and services company with global reach, financial stability and…”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
6Exact matchHouston, TX, United StatesHQ recorded Oct 22, 20265,001-10,0001,652 contacts →

Exact match

“Oil States International, Inc.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
7Exact matchHouston, TX, United StatesHQ recorded Oct 22, 20265,001-10,0001,478 contacts →

Exact match

“NexTier is a leading provider of integrated completions focused on the most demanding land basins in the US.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
8Exact matchThe Woodlands, TX, United StatesHQ recorded Oct 22, 20261,001-5,0001,329 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
9Exact matchThe Woodlands, TX, United StatesHQ recorded Oct 22, 20261,001-5,0001,213 contacts →

Exact match

“THE ULTIMATE PARTNER IN WELLBORE PLACEMENT Scientific Drilling International is an independent service provider offering a complete high accuracy wellbore placement and drilling…”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
10Exact matchHouston, TX, United StatesHQ recorded Oct 22, 20261,001-5,0001,145 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
11Exact matchHouston, TX, United StatesHQ recorded Oct 22, 20261,001-5,000874 contacts →

Exact match

“KLX Energy Services provides more than 100 mission-critical oilfield services, tools, technologies and equipment to some of the industry’s leading operators.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
12Exact matchHumble, TX, United StatesHQ recorded Oct 22, 20261,001-5,000843 contacts →

Exact match

“Innovex International, Inc (NYSE: INVX) is a Houston-based company established in 2024 following the merger of Dril-Quip, Inc and Innovex Downhole Solutions.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
13Exact matchHouston, TX, United StatesHQ recorded Oct 22, 20261,001-5,000776 contacts →

Exact match

“Wellbore Integrity Solutions provides superior technologies and global service domain expertise, enabling our customers to enhance the full lifecycle of their wells by solving…”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
14Exact matchFort Worth, TX, United StatesHQ recorded Oct 22, 20261,001-5,000766 contacts →

Exact match

“FTS International is one of the largest well completion companies in North America.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Oct 22, 20261,001-5,000742 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
16Exact matchAlice, TX, United StatesHQ recorded Oct 22, 20261,001-5,000652 contacts →

Exact match

“FESCO is a diversified energy services company providing quality equipment and experienced personnel since 1949.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Oct 22, 20261,001-5,000506 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
18Exact matchHouston, TX, United StatesHQ recorded Oct 22, 2026201-500451 contacts →

Exact match

“EnerVest is a top-tier, low-cost oil and natural gas operating company.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
19Exact matchNewcastle, OK, United StatesHQ recorded Oct 22, 2026501-1,000445 contacts →

Exact match

“Only Thru Tubing Solutions offers the specialized downhole equipment and services to deliver the results you need, right when you need them.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
20Exact matchSugar Land, TX, United StatesHQ recorded Oct 22, 2026501-1,000438 contacts →

Exact match

“GR Energy Services is a completion solutions company committed to lowering oil and gas company operational risk and total cost of operations.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
21Exact matchZelienople, PA, United StatesHQ recorded Oct 22, 2026501-1,000410 contacts →

Exact match

“Established in 2008, Deep Well Services (DWS) is an oilfield services company specializing in the most complex and difficult types of well work utilizing hydraulic completion…”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
22Exact matchHouston, TX, United StatesHQ recorded Oct 22, 2026501-1,000391 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
23Exact matchHouston, TX, United StatesHQ recorded Oct 22, 2026201-500305 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
24Exact matchNew Iberia, LA, United StatesHQ recorded Oct 22, 2026501-1,000297 contacts →

Exact match

“LEAM Drilling Systems, Inc.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
25Exact matchScott, LA, United StatesHQ recorded Oct 22, 2026201-500293 contacts →

Exact match

“Gordon Technologies is an engineering company providing innovative new technology and service to the oil and gas drilling industry.”

Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase

Showing 25 of 689 oil and gas well completion services based in the United States

See the full list, filter by size, metro and specialty, and access 29,326 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oil and gas well completion services based in the United States at a glance

As of Oct 22, 2026
27.1%Verified-email coverage
157.0Average contacts per company
11-50Median size (employees)
16.8%Largest-city concentration · Houston
Oct 22, 2026Page data refreshed

Companies by employee count

1-10
159
11-50
208
51-200
194
201-500
60
501-1,000
26
1,001-5,000
33
5,001-10,000
6
10001+
3

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 689 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “oil and gas well completion services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 29,326 professional contacts with verified work emails across the full matched dataset. 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 October 22, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “oil and gas well completion services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil and gas well completion services are there based in the United States?

RevenueBase identified 689 company matches for oil and gas well completion services associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Halliburton tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most oil and gas well completion services?

Houston leads with 116 company records, followed by Midland (60) and Odessa (25).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 29,326 professional contacts with verified work emails tracked across these 689 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 22, 2026.

Ready to reach these companies? Verified emails and direct dials for all 689 oil and gas well completion services based in the United States. Start with a free account, no credit card.

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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 SmartSearch, 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.