Company lists · Data refreshed September 2026

Top 13 Offshore drilling vessel operators based in Canada

Name: Offshore drilling vessel operators based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 25 companies tracked

RevenueBase identified 25 offshore drilling vessel operators headquartered in Canada as of September 2026 and tracks 4,301 professional contacts across them, including 917 with verified work emails. Calgary is the largest hub.

This list covers offshore drilling vessel operators headquartered in Canada, 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 20, 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 20, 2026 86% judged on-target in blind review

25Companies

4,301Contacts tracked

917Verified emails

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The 13 largest offshore drilling vessel operators based in Canada

Ranked by team size

Top 13 of 25 offshore drilling vessel operators based in Canada, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to offshore drilling vessel operators: 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	Precision Drilling	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 20, 2026	5,001-10,000	2,471 contacts →
	Indirect evidence “Precision is a leading provider of safe and High Performance, High-Value services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 20, 2026
2	Horizon Drilling	Partial evidence	Calgary, AB, CanadaHQ checked Sep 20, 2026	501-1,000	221 contacts →
	Partial evidence “Horizon Drilling is a division of Western Energy Corps and is Canada’s most reliable and one of the largest drilling contractors.” Source: RevenueBase Database · checked Sep 20, 2026
3	Atlantic Towing	Partial evidence	Saint John, NB, CanadaHQ checked Sep 20, 2026	501-1,000	194 contacts →
	Partial evidence “Atlantic Towing is a leading provider of Offshore Supply, Port and Coastal marine services, operating in the North Atlantic, South Atlantic, Arctic and Pacific Coastal regions, as…” Source: RevenueBase Database · checked Sep 20, 2026
4	Hy-Tech Drilling LTD	Partial evidence	Smithers, BC, CanadaHQ checked Sep 20, 2026	501-1,000	193 contacts →
	Partial evidence “With a focus on preparedness, Hy-Tech Drilling is the long-term partner you can trust to ensure safe and seamless execution, giving you peace of mind.” Source: RevenueBase Database · checked Sep 20, 2026
5	Citadel Drilling LTD	Partial evidence	Calgary, AB, CanadaHQ checked Sep 20, 2026	51-200	74 contacts →
	Partial evidence “To put it bluntly, Citadel Drilling is different.” Source: RevenueBase Database · checked Sep 20, 2026
6	Canship Ugland LTD	Partial evidence	Paradise, NL, CanadaHQ checked Sep 20, 2026	201-500	73 contacts →
	Partial evidence “We are a Ship Management and crewing company operating and managing DP shuttle tankers, harbour tugs, bulk carrier, cargo vessel, oceangoing tug and barge, pilot boats and product…” Source: RevenueBase Database · checked Sep 20, 2026
7	Reliance Offshore, A Subsidiary Of I. H. Mathers	Partial evidence	St John’s, NL, CanadaHQ checked Sep 20, 2026	201-500	64 contacts →
	Partial evidence “Reliance Offshore is the offshore & marine personnel subsidiary of the I.” Source: RevenueBase Database · checked Sep 20, 2026
8	Siem Offshore Canada	Strong evidence	Dartmouth, NS, CanadaHQ checked Sep 20, 2026	51-200	55 contacts →
	Strong evidence “Siem Offshore manages a harsh-weather fleet of offshore support vessels servicing major offshore energy companies.” Source: RevenueBase Database · checked Sep 20, 2026
9	Excalibur Drilling LTD	Partial evidence	Brooks, CanadaHQ checked Sep 20, 2026	51-200	36 contacts →
	Partial evidence “Excalibur Drilling operates four high performance identical heavy telescopic double drilling rigs in Alberta, British Columbia and Saskatchewan with measured depth capabilities of…” Source: RevenueBase Database · checked Sep 20, 2026
10	Leeway Marine	Partial evidence	Dartmouth, NS, CanadaHQ checked Sep 20, 2026	11-50	27 contacts →
	Partial evidence “We own and operate a fleet of vessels, and coordinate operations to support our clients in the acquisition of ocean data.” Source: RevenueBase Database · checked Sep 20, 2026
11	Canpac Marine Services INC	Partial evidence	North Vancouver, BC, CanadaHQ checked Sep 20, 2026	51-200	26 contacts →
	Partial evidence “Canpac Marine Services Inc, is based in the Port of Vancouver, Canada and has been providing marine services to inland, coastal, and offshore sectors since 1965.” Source: RevenueBase Database · checked Sep 20, 2026
12	Nabors Drilling Limited	Partial evidence	Brooks, AB, CanadaHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “Nabors Drilling Limited is a company based out of 551 Industrial Rd, Brooks, AB, Canada.” Source: RevenueBase Database · checked Sep 20, 2026
13	Orange Force Marine LTD	Partial evidence	Port Stanley, ON, CanadaHQ checked Sep 20, 2026	1-10	3 contacts →
	Partial evidence “Orange Force Marine is a capable marine service company that provides flexible, reliable, efficient vessels & equipment, combining professional crew, highly experienced management…” Source: RevenueBase Database · checked Sep 20, 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: offshore drilling vessel operators. 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 offshore drilling vessel operators.
Partial evidence: Its own public description names part of offshore drilling vessel operators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore drilling vessel operators. 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 13 of 25 offshore drilling vessel operators based in Canada

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Offshore drilling vessel operators based in Canada at a glance

As of Sep 20, 2026

21.3%Verified-email coverage

172.0Average contacts per company

51-200Median size (employees)

20.0%Largest-city concentration · Calgary

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 25 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 offshore drilling vessel operators, 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 Canada whose own description of what they do matches “offshore drilling vessel operators”. 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 offshore drilling vessel operators), 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 offshore drilling vessel operators, and records with no verified work email. Companies headquartered outside Canada 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, 917 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 20, 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 offshore drilling vessel operators, 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 offshore drilling vessel operators are there based in Canada?

RevenueBase identified 25 offshore drilling vessel operators headquartered in Canada 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?

Precision Drilling, headquartered in Calgary, tops this list with the largest team on record.

Which city has the most offshore drilling vessel operators?

Calgary leads with 5 headquartered companies, followed by Dartmouth (3) and Brooks (2).

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 917 verified decision-maker contacts tracked across these 25 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 20, 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.