Finned Suction Piles: Groundbreaking Offshore Experience in Deepwater Clay Soils of Brazil

Abstract This publication represents a critical step in advancing offshore anchoring systems through the implementation of finned suction piles in deepwater fields in Brazil. Building on previous publications that covered geotechnical and structural design in addition to installation analysis, the field data obtained now validates and completes the finned suction pile design. The study highlights the reduction in pile size, enhanced holding capacity, and improved installation processes enabled by the addition of fins, offering a comparative perspective with traditional plain suction piles. Offshore operations feedback corroborates design predictions, demonstrating that fins do not negatively impact the installation process while aligning observed field behavior with design expectations. These findings confirm that finned suction piles are not merely an alternative to traditional suction piles but an evolution that offers a more efficient and reliable anchoring solution. A key objective of this paper is to leverage back-analysis results from these installations to refine the design soil profiles and properties, serving as a benchmark for future anchoring designs in similar deepwater clays. The validation of geotechnical, structural, and now installation behaviors establishes finned suction piles as a field-proven and optimized improvement, paving the way for broader adoption in deepwater environments, particularly for regions with similar geotechnical conditions, such as the Gulf of Guinea and the Gulf of Mexico. This research showcases material savings, reduced environmental impact, and enhanced anchoring performance, setting a new benchmark for offshore anchoring systems.