Oliasoft WellDesign is a modern, web-based well engineering platform that unifies all key simulations and calculations required in the well planning process. Built by engineers for engineers, it delivers advanced modules for trajectory design, casing and tubing design, drilling mechanics, hydraulics, surge and swab, and blowout and kill analysis. By leveraging predefined rulesets and robust APIs, the software automates complex design workflows, enables rapid scenario evaluation, and integrates seamlessly with existing operator and subsurface systems, including two-way OSDU data flows. The result is faster, more consistent well planning that reduces project costs, enhances safety, and supports fully digital, connected well operations.