Deviated wells with a high dogleg severity (DLS) or buildup rate present major challenges for electrical submersible pumping systems(ESP) and often prevents the installation of ESPs at the deepest possible setting depth (El Mahbes, 2016). Passing ESP systems through a tight bend radius can reduce system reliability and limit how deep the system can be set to achieve maximum oil recovery. This paper highlights the benefit of using a newly designed ESP system for five highly deviated wells.

The new tight-radius ESP system is designed to pass through buildup rates of up to 25° per 100 ft. with no impact on reliability. This capability means the ESP can be placed at the lowest possible setting depth closer to the production zone, which permits greater reservoir pressure draw down, enhanced overall production, and improved reserve recovery. In addition, tight-radius ESP system reduces the equipment installation time by more than 50% and eliminates the potential of dropping bolts in the wellbore during installation.

This paper presents a comparison between using conventional ESP systems and the new tight-radius ESP design in highly deviated wells and wells where the buildup rate is very high for conventional ESPs to pass through. This technology was applied in multiple wells and results showed that the new ESP design helped extend ESP run life and allowed the operator to set the system deeper in the well, closer to the producing zone, to increase production and maximize reserve recovery.

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