A month ago, the private analytical and reconnaissance company Dallas published evidence of sanctions violations by the global oilfield services giant SLB (formerly Schlumberger). In our previous investigation, we showed how Western technologies continue to reach Russia and sustain the Russian oil extraction sector. We never received a response to our inquiry regarding SLB’s continued operations in Russia. Therefore, despite a month of silence from the corporation, we are publishing a new set of evidence showing cooperation between SLB subsidiaries and sanctioned Russian oil companies. This investigation shows how Technological Company Schlumberger LLC (Russia) and Schlumberger Logelco, Inc. (Panama) continue to service oil fields operated by Rosneft — the state-controlled energy giant that was hit with a new round of sweeping U.S. sanctions at the end of October this year.
WINTER MOBILIZATION
Analysts from Dallas have gained access to the tender procurement portal of SLB’s Russian subsidiary, Technological Company Schlumberger LLC (https://bidding.supply.slb). At the time of analysis, the portal listed an open tender for a project titled “Winter Mobilization” for 2026, organized in the interests of the Vostok Oil project.
Open tenders on the Schlumberger procurement portal
To understand what “Winter Mobilization” refers to, one must look at the project description. The tender invites participants to provide cargo transportation services for the Schlumberger group of companies to oil and gas fields associated with the Vostok Oil and TBS projects. According to the tender documentation, the winning bidder will sign a framework agreement for the provision of these services from December 1, 2025, to May 31, 2026.
It is clear that the nature of these shipments is aimed at ensuring the uninterrupted operation and maintenance of oil fields essential to Russia’s hydrocarbon production.
Description of the commercial offer on the portal
ROSNEFT
This raises the question: in whose interests is Schlumberger actually operating — and who are Vostok Oil and TBS?
Vostok Oil is a project of the Russian state-owned oil company Rosneft. According to the company’s official website, Rosneft launched this initiative in 2020 — describing it as the largest hydrocarbon production project in the modern global oil and gas industry. The project’s resource base, located in the northern part of Russia’s Krasnoyarsk Krai, is estimated at over 6 billion tons of premium low-sulfur crude oil.
Description of the Vostok Oil project on the Rosneft website
TBS refers to TaimyrBurService, a Russian company wholly owned by Vostok Oil, whose primary business is the provision of oil and gas extraction services.
Yet regardless of how many different legal entities appear in this chain, one essential fact remains clear: all of these enterprises — no matter what names they operate under — are part of Rosneft.
THE ROLE OF SCHLUMBERGER
Analysts from Dallas reviewed a set of documents provided to participants in the tender for winter maintenance of oil fields. This data package includes a sample freight forwarding contract for contractors responsible for delivering cargo to the sites, as well as templates and forms for access permits to oil extraction areas, entry regulations, and other requirements established by Vostok Oil — including standards for access control and internal site regulations.
These rules were prepared by RN-Vankor, another Rosneft subsidiary that has been under U.S. sanctions since January 2025. From these documents, it becomes clear that Russian oil facilities are under strict security measures, with internal regulations resembling those of military installations — which is hardly surprising, given that Russian oil has long been a source of funding for the aggressor’s war.
Access control rules at Rosneft facilities
The standard freight forwarding contract reveals the network of legal entities involved and clarifies Schlumberger’s role in this process. Rosneft’s oil facilities act as the end beneficiaries, while a series of companies place orders for cargo deliveries executed by the freight forwarder. The following companies are listed in the contract:
- Schlumberger Logelco, Inc. (Компания “Шлюмберже Лоджелко, Инк.”);
- Schlumberger Technology Company LLC (ООО “Технологическая Компания Шлюмберже”);
- Schlumberger Vostok LLC (ООО “Шлюмберже Восток”);
- EPU Service Center LLC (ООО “Сервис центр ЭПУ”);
- PetroAlliance Service Company LLC (ООО “Сервисная компания “ПетроАльянс””);
- Tyumenpromgeofizika Production Geophysical Association (АО “Производственное Геофизическое Объединение “Тюменьпромгеофизика””);
- Tyumen Experimental Geophysical Instrumentation Plant (АО “Тюменский Опытно-Экспериментальный Завод Геофизического Приборостроения”);
- Pomorneftegazgeofizika (АО “Поморнефтегазгеофизика”);
- Radius-Service LLC (ООО “Фирма “Радиус-Сервис””);
- REDALIT Schlumberger LLC (ООО “РЭДАЛИТ Шлюмберже”);
- Techgeoservice LLC (ООО “Техгеосервис”).
The first page of a standard Schlumberger freight forwarding contract. The contract is marked Schlumberger-Private confidential. Schlumberger Logelco, Inc. is highlighted in red.
Most of the companies listed are Russian entities, three of which are clearly affiliated with SLB, as reflected in their names: Technological Company Schlumberger LLC (previously featured in our earlier investigation), Schlumberger Vostok LLC, and REDALIT Schlumberger LLC.
However, the first company named in the contract is Schlumberger Logelco, Inc., incorporated under the laws of Panama with a registered address at 8 Calle Aquilino de la Guardia, Panama City, Republic of Panama, and an officially registered representative office in Russia.
Further documentation related to the Winter Mobilization project highlights the leading role of this Panamanian company among the other entities. For example, in the project’s entry and equipment transportation guidelines for Vostok Oil, it is specified that individuals entering Rosneft’s oil sites must list “Schlumberger Logelco, Inc.” as the organization they represent in their application forms — followed by their respective segment, such as Schlumberger Vostok, PetroAlliance, and others.
This clearly indicates that Schlumberger Logelco, Inc. serves as the primary contractor overseeing logistics and transportation for Rosneft’s oil fields, while the other companies listed supply cargo, equipment, and materials to be delivered to the sites.
Screenshots of the memo regarding the arrival and transportation of equipment for the Vostok Oil project. The coordinates of the facilities and the mention of the Panamanian company Schlumberger Logelco, Inc. are highlighted in red.
Notably, the documentation includes geographical coordinates of several facilities, allowing precise identification of at least three sites serviced by SLB’s Russian branches. These locations lie east of the village of Karaul in the Krasnoyarsk Krai, where the Irkinskaya license area is mentioned. Satellite imagery confirms the presence of Taymyr-001 drilling rigs and other infrastructure typical of oil extraction sites at these coordinates.
The oil production sites serviced by SLB branches are located northeast of the village of Karaul.
Rosneft has previously published maps of its oil fields, and the data aligns with the locations specified in the documents.
It is worth noting that Vostok Oil is described by Russian sources as “Rosneft’s flagship project, potentially the largest and most promising venture in the global oil and gas industry.” And this flagship project, despite international sanctions, is being serviced by a foreign company — Schlumberger Logelco, Inc.
CONCLUSIONS
On October 22, 2025, the United States imposed sanctions on Russia for the first time since the change of administration. The measures targeted Russia’s oil giants Lukoil and Rosneft, as President Trump seeks to pressure Putin into agreeing to a ceasefire.
Our previous investigation into SLB’s operations in Russia revealed how Western technologies continue to reach Russian enterprises engaged in the production of oil equipment — a clear violation of the “old U.S. sanctions.”
This new investigation demonstrates that SLB and its Panamanian subsidiary, Schlumberger Logelco, Inc., are directly servicing Rosneft — a blatant breach of the “new U.S. sanctions.”
The question now is: how long will SLB continue to openly disregard sanctions, remaining silent or hiding behind vague statements about “protecting assets and personnel in Russia”? While SLB is not formally registered in the United States, its headquarters in Houston, Texas make its actions tantamount to pursuing an anti-American policy — there is no other way to describe such disregard for sanctions.
We are prepared to provide original copies of the documents used in this investigation — which confirm that SLB subsidiaries are servicing Rosneft facilities — to any interested journalists or analysts. To request access, please use the contact form on our website.
