This session brings together recent advances in drilling technologies and engineering methodologies that are reshaping performance in complex onshore and offshore reservoirs. The session covers high-efficiency horizontal drilling enabled by motorized and rotary steerable systems, automation platforms for non-conventional fields, and field-validated innovations in PDC bit design and cutter–rock interaction. The session also explores optimized well trajectory design using multi-objective approaches to balance risk, cost, and performance, alongside the impact of wellbore irregularities on drilling dynamics. Real-world case studies from Latin America and deepwater environments demonstrate how data-driven decisions, instrumentation, and design optimization translate theory into measurable operational gains. Collectively, the presentations highlight how integrated drilling solutions can improve penetration rates, reduce non-productive time, and enhance overall well delivery efficiency.