INC. has completed the construction of an extremely complex horizontal well with a length of 4,100 meters

09.07.2026       

Irkutsk Oil Company (Inc.) has set a new industry record in the segment of onshore drilling in the Russian Federation. The drilling division of the holding, INC-Service LLC, has successfully completed the construction of an ultra—complex horizontal well at the Bolshetirskoye license area in Eastern Siberia, the company&s press service reported. The total length of the trunk was 4,100 meters, and the construction and installation cycle took 90 days. The facility belongs to the category of wells with an extremely large vertical deviation (ERD): the ratio of the length of the trunk to the vertical depth has reached 4.3. According to the international classification, the project has been assigned a complexity index of 7.1 out of 10, which verifies its compliance with the standards of the world&s most complex technological cases.

The key factor in the successful implementation of the project and overcoming geomechanical risks was the introduction of proprietary engineering solutions and patented formulations of drilling fluids. In particular, the INC specialists have developed and integrated an innovative eco-friendly lubricating additive into the production process. The reagent minimizes the coefficient of friction when conducting in a productive reservoir and allows you to completely eliminate the use of hydrocarbon-based solutions. This technology has reduced the anthropogenic impact on the environment and ensured high stability of the borehole walls during ERD drilling.

Currently, INK-Service, which ranks second in the industry ranking of the best employers among drilling companies, has secured the status of a key contractor in the East Siberian region with a total drilling capacity of about 6.5 million meters (more than 1.5 thousand wells). The new strategic goal of the company is to reduce the construction time of wells with a horizontal area of more than 3,000 meters by half. The intensification of drilling operations is designed to significantly increase the profitability and economic efficiency of developing complex reserves on the assets of the subsurface user.