Company lists · Data refreshed September 2026

Top 15 Downstream petroleum IT services based in London, United Kingdom

Name: Downstream petroleum IT services based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 59 companies tracked

RevenueBase identified 59 company matches for downstream petroleum IT services associated with London, United Kingdom as of September 2026 and tracks 698 professional contacts across them, including 152 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for downstream petroleum IT services associated with London, United Kingdom, 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 September 28, 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 Sep 28, 2026 How this list was built

59Companies

698Contacts tracked

152Verified emails

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The 15 largest downstream petroleum IT services based in London, United Kingdom

Ranked by team size

Top 15 of 59 company matches for downstream petroleum IT services based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Hobark International Limited	Exact match	London, United KingdomHQ recorded Sep 28, 2026	201-500	113 contacts →
	Exact match “Hobark International Limited (HIL) is an Integrated Services Company whose subsidiaries: DrillPet International Limited (DIL), Uniterm Nigeria Limited (UNL), UltiProc Nigeria…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Euro Petroleum Consultants	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	66 contacts →
	Exact match “We are a leading independent consulting company with global expertise in Refining, Gas, Petrochemicals, Renewables, and Alternative Energies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Mobility OIL & GAS Limited	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	48 contacts →
	Exact match “Mobility Oil & Gas provides comprehensive services to the oil and gas industry in the areas of Petroleum Engineering Consultancy and Technical Training.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Islay Subsurface & Engineering LTD	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	17 contacts →
	Exact match “Islay Subsurface & Engineering Ltd was founded in 2010 by Iain Whyte to provide support to oil and gas operators, and their partners.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Nventures LTD	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	13 contacts →
	Exact match “The best way to address subsurface risk in exploration is by industry collaboration.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Petroxin	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	13 contacts →
	Exact match “PETROXIN is an international upstream oil and gas company providing technical expertise and cost-effective full life-cycle integrated solutions to global clients of operators and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Citac Africa LTD	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	11 contacts →
	Exact match “CITAC Africa Ltd is a UK-based, independent consultancy company focusing on the downstream African Energy market.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Touchstoneenergy	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	6 contacts →
	Exact match “TouchstoneEnergy are leading providers of world-class business systems dedicated to the global energy sector.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Aeonx Limited	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	5 contacts →
	Exact match “Deploying broad technical and engineering solutions to help oil and gas companies maximise value from their assets.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Rebduk	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “We are an independent oil and gas consultancy, who offers business development services for European market.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Pardelta	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “At Pardelta, we believe progress should be purposeful, with experience across petrochem trading, retail refining and distribution; we enable small and medium businesses to scale…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Opus OIL And GAS Limited	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	2 contacts →
	Exact match “We are Opus Oil and Gas.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Strados International	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match “Strados International Limited is a startup delivering world‑class subsurface professional services for the exploration, development, and management of energy resources.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Dstreamz LTD	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match “Dstreamz offers a compounded value of the Oil and Gas downstream sector's in-depth knowledge and strong expertise in developing and implementing digital solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Gilrita Consulting Limited	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “downstream petroleum IT services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 15 of 59 downstream petroleum IT services based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 152 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Downstream petroleum IT services based in London, United Kingdom at a glance

As of Sep 28, 2026

21.8%Verified-email coverage

11.8Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

5,001-10,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 59 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 London, United Kingdom whose business descriptions match “downstream petroleum IT 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 152 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 September 28, 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.

Downstream petroleum IT services by metro in the United Kingdom

Downstream petroleum IT services in Aberdeen40

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 “downstream petroleum IT services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many downstream petroleum IT services are there based in London, United Kingdom?

RevenueBase identified 59 company matches for downstream petroleum IT services associated with London, United Kingdom as of September 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?

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

Which city in the United Kingdom has the most downstream petroleum IT services?

London leads the United Kingdom with 59 company records, followed by Aberdeen (40) and Edinburgh (7).

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 152 professional contacts with verified work emails tracked across these 59 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 September 28, 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 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.