It is widely recognized throughout the industry that as wells get deeper and well trajectories get more complex, the challenge to establish effective cement for zonal isolation (ZI) increases.

This paper will present the results of the world's first installation of a cementless liner using state-of-the-art well annular barrier technology within a subsea, deepwater, pre-salt well in Brazil. This new method demonstrates that maintaining an open sand face delivers lower skin and potentially higher productivity.

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